graal-compiler: src/share/vm/gc_implementation/g1/concurrentMark.cpp annotate

annotate src/share/vm/gc_implementation/g1/concurrentMark.cpp @ 14304:a2866d45e99e

8027454: Do not traverse string table during G1 remark when treating them as strong roots during initial mark Summary: Do not try to unlink string table entries unconditionally during remark. This is without side effects as the preceding initial mark always uses the string table as strong roots. Needs to be fixed with class unloading during concurrent mark. Reviewed-by: brutisso, mgerdin

author	tschatzl
date	Mon, 20 Jan 2014 11:47:29 +0100
parents	893ce66f7473
children	63a4eb8bcd23 58fc1b1523dc

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");
14209 46e2a5b0c076 8029326: G1 does not check if threads gets created ehelin parents: 12316 diff changeset	556 if (_cmThread->osthread() == NULL) {
46e2a5b0c076 8029326: G1 does not check if threads gets created ehelin parents: 12316 diff changeset	557 vm_shutdown_during_initialization("Could not create ConcurrentMarkThread");
46e2a5b0c076 8029326: G1 does not check if threads gets created ehelin parents: 12316 diff changeset	558 }
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	559
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	560 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	561 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	562 assert(_markBitMap2.covers(heap_rs), "_markBitMap2 inconsistency");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	563
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	564 SATBMarkQueueSet& satb_qs = JavaThread::satb_mark_queue_set();
1282 b81f3572f355 6928059: G1: command line parameter renaming tonyp parents: 1111 diff changeset	565 satb_qs.set_buffer_size(G1SATBBufferSize);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	566
4837 eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	567 _root_regions.init(_g1h, this);
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	568
1284 5f1f51edaff6 6928081: G1: rename parameters common with CMS jmasa parents: 1282 diff changeset	569 if (ConcGCThreads > ParallelGCThreads) {
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	570 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	571 "than ParallelGCThreads (" UINT32_FORMAT ").",
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	572 ConcGCThreads, ParallelGCThreads);
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	573 return;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	574 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	575 if (ParallelGCThreads == 0) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	576 // 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	577 // spawn any marking threads either
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	578 _parallel_marking_threads = 0;
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	579 _max_parallel_marking_threads = 0;
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	580 _sleep_factor = 0.0;
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	581 _marking_task_overhead = 1.0;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	582 } else {
8006 4700e77d44c1 8006894: G1: Number of marking threads missing from PrintFlagsFinal output johnc parents: 7450 diff changeset	583 if (!FLAG_IS_DEFAULT(ConcGCThreads) && ConcGCThreads > 0) {
4700e77d44c1 8006894: G1: Number of marking threads missing from PrintFlagsFinal output johnc parents: 7450 diff changeset	584 // Note: ConcGCThreads has precedence over G1MarkingOverheadPercent
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	585 // if both are set
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	586 _sleep_factor = 0.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	587 _marking_task_overhead = 1.0;
751 20c6f43950b5 6490395: G1: Tidy up command line flags. johnc parents: 647 diff changeset	588 } else if (G1MarkingOverheadPercent > 0) {
8006 4700e77d44c1 8006894: G1: Number of marking threads missing from PrintFlagsFinal output johnc parents: 7450 diff changeset	589 // 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	590 // 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	591 double marking_overhead = (double) G1MarkingOverheadPercent / 100.0;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	592 double overall_cm_overhead =
751 20c6f43950b5 6490395: G1: Tidy up command line flags. johnc parents: 647 diff changeset	593 (double) MaxGCPauseMillis * marking_overhead /
20c6f43950b5 6490395: G1: Tidy up command line flags. johnc parents: 647 diff changeset	594 (double) GCPauseIntervalMillis;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	595 double cpu_ratio = 1.0 / (double) os::processor_count();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	596 double marking_thread_num = ceil(overall_cm_overhead / cpu_ratio);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	597 double marking_task_overhead =
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	598 overall_cm_overhead / marking_thread_num *
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	599 (double) os::processor_count();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	600 double sleep_factor =
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	601 (1.0 - marking_task_overhead) / marking_task_overhead;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	602
8006 4700e77d44c1 8006894: G1: Number of marking threads missing from PrintFlagsFinal output johnc parents: 7450 diff changeset	603 FLAG_SET_ERGO(uintx, ConcGCThreads, (uint) marking_thread_num);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	604 _sleep_factor = sleep_factor;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	605 _marking_task_overhead = marking_task_overhead;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	606 } else {
8006 4700e77d44c1 8006894: G1: Number of marking threads missing from PrintFlagsFinal output johnc parents: 7450 diff changeset	607 // 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	608 // the number of parallel GC threads.
4700e77d44c1 8006894: G1: Number of marking threads missing from PrintFlagsFinal output johnc parents: 7450 diff changeset	609 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	610 FLAG_SET_ERGO(uintx, ConcGCThreads, marking_thread_num);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	611 _sleep_factor = 0.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	612 _marking_task_overhead = 1.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	613 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	614
8006 4700e77d44c1 8006894: G1: Number of marking threads missing from PrintFlagsFinal output johnc parents: 7450 diff changeset	615 assert(ConcGCThreads > 0, "Should have been set");
4700e77d44c1 8006894: G1: Number of marking threads missing from PrintFlagsFinal output johnc parents: 7450 diff changeset	616 _parallel_marking_threads = (uint) ConcGCThreads;
4700e77d44c1 8006894: G1: Number of marking threads missing from PrintFlagsFinal output johnc parents: 7450 diff changeset	617 _max_parallel_marking_threads = _parallel_marking_threads;
4700e77d44c1 8006894: G1: Number of marking threads missing from PrintFlagsFinal output johnc parents: 7450 diff changeset	618
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	619 if (parallel_marking_threads() > 1) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	620 _cleanup_task_overhead = 1.0;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	621 } else {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	622 _cleanup_task_overhead = marking_task_overhead();
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	623 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	624 _cleanup_sleep_factor =
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	625 (1.0 - cleanup_task_overhead()) / cleanup_task_overhead();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	626
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	627 #if 0
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	628 gclog_or_tty->print_cr("Marking Threads %d", parallel_marking_threads());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	629 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	630 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	631 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	632 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	633 #endif
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	634
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	635 guarantee(parallel_marking_threads() > 0, "peace of mind");
1833 8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1719 diff changeset	636 _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	637 _max_parallel_marking_threads, false, true);
1833 8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1719 diff changeset	638 if (_parallel_workers == NULL) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	639 vm_exit_during_initialization("Failed necessary allocation.");
1833 8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1719 diff changeset	640 } else {
8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1719 diff changeset	641 _parallel_workers->initialize_workers();
8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1719 diff changeset	642 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	643 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	644
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	645 if (FLAG_IS_DEFAULT(MarkStackSize)) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	646 uintx mark_stack_size =
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	647 MIN2(MarkStackSizeMax,
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	648 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	649 // 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	650 // 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	651 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	652 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	653 "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	654 mark_stack_size, 1, MarkStackSizeMax);
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	655 return;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	656 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	657 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	658 } else {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	659 // Verify MarkStackSize is in range.
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	660 if (FLAG_IS_CMDLINE(MarkStackSize)) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	661 if (FLAG_IS_DEFAULT(MarkStackSizeMax)) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	662 if (!(MarkStackSize >= 1 && MarkStackSize <= MarkStackSizeMax)) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	663 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	664 "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	665 MarkStackSize, 1, MarkStackSizeMax);
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	666 return;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	667 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	668 } 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	669 if (!(MarkStackSize >= 1 && MarkStackSize <= MarkStackSizeMax)) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	670 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	671 " or for MarkStackSizeMax (" UINTX_FORMAT ")",
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	672 MarkStackSize, MarkStackSizeMax);
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	673 return;
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 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	677 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	678
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	679 if (!_markStack.allocate(MarkStackSize)) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	680 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	681 return;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	682 }
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 _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	685 _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	686
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	687 _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	688 _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	689
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	690 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	691
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	692 // 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	693 _active_tasks = _max_worker_id;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	694
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	695 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	696 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	697 CMTaskQueue* task_queue = new CMTaskQueue();
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	698 task_queue->initialize();
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	699 _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	700
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	701 _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	702 _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	703
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	704 _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	705 _count_marked_bytes[i],
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	706 &_count_card_bitmaps[i],
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	707 task_queue, _task_queues);
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 _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	710 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	711
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	712 // 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	713 // 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	714 _heap_bottom_card_num =
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	715 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	716 CardTableModRefBS::card_shift);
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	717
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	718 // 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	719 clear_all_count_data();
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	720
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	721 // 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	722 _heap_start = (HeapWord*) heap_rs.base();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	723 set_non_marking_state();
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	724 _completed_initialization = true;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	725 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	726
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	727 void ConcurrentMark::update_g1_committed(bool force) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	728 // 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	729 // update _heap_end.
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	730 if (!concurrent_marking_in_progress() && !force) return;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	731
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	732 MemRegion committed = _g1h->g1_committed();
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	733 assert(committed.start() == _heap_start, "start shouldn't change");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	734 HeapWord* new_end = committed.end();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	735 if (new_end > _heap_end) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	736 // The heap has been expanded.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	737
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	738 _heap_end = new_end;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	739 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	740 // Notice that the heap can also shrink. However, this only happens
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	741 // during a Full GC (at least currently) and the entire marking
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	742 // 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	743 // do nothing.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	744 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	745
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	746 void ConcurrentMark::reset() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	747 // 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	748 // phase. CM will be notified of any future g1_committed expansions
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	749 // will be at the end of evacuation pauses, when tasks are
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	750 // inactive.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	751 MemRegion committed = _g1h->g1_committed();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	752 _heap_start = committed.start();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	753 _heap_end = committed.end();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	754
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	755 // Separated the asserts so that we know which one fires.
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	756 assert(_heap_start != NULL, "heap bounds should look ok");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	757 assert(_heap_end != NULL, "heap bounds should look ok");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	758 assert(_heap_start < _heap_end, "heap bounds should look ok");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	759
7450 d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	760 // Reset all the marking data structures and any necessary flags
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	761 reset_marking_state();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	762
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	763 if (verbose_low()) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	764 gclog_or_tty->print_cr("[global] resetting");
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	765 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	766
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	767 // We do reset all of them, since different phases will use
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	768 // 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	769 // of them ready.
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	770 for (uint i = 0; i < _max_worker_id; ++i) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	771 _tasks[i]->reset(_nextMarkBitMap);
1835 4805b9f4779e 6941395: G1: Use only lock-free versions of region stack push() and pop() johnc parents: 1833 diff changeset	772 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	773
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	774 // 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	775 // pause with initial mark piggy-backed
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	776 set_concurrent_marking_in_progress();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	777 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	778
7450 d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	779
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	780 void ConcurrentMark::reset_marking_state(bool clear_overflow) {
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	781 _markStack.set_should_expand();
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	782 _markStack.setEmpty(); // Also clears the _markStack overflow flag
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	783 if (clear_overflow) {
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	784 clear_has_overflown();
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	785 } else {
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	786 assert(has_overflown(), "pre-condition");
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	787 }
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	788 _finger = _heap_start;
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	789
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	790 for (uint i = 0; i < _max_worker_id; ++i) {
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	791 CMTaskQueue* queue = _task_queues->queue(i);
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	792 queue->set_empty();
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	793 }
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	794 }
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	795
8788 e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	796 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	797 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	798
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	799 _active_tasks = active_tasks;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	800 // Need to update the three data structures below according to the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	801 // number of active threads for this phase.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	802 _terminator = ParallelTaskTerminator((int) active_tasks, _task_queues);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	803 _first_overflow_barrier_sync.set_n_workers((int) active_tasks);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	804 _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	805 }
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	806
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	807 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	808 set_concurrency(active_tasks);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	809
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	810 _concurrent = concurrent;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	811 // 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	812 for (uint i = 0; i < _max_worker_id; ++i)
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	813 _tasks[i]->set_concurrent(concurrent);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	814
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	815 if (concurrent) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	816 set_concurrent_marking_in_progress();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	817 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	818 // We currently assume that the concurrent flag has been set to
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	819 // 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	820 // in a STW phase.
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	821 assert(!concurrent_marking_in_progress(), "invariant");
8788 e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	822 assert(_finger == _heap_end,
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	823 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	824 _finger, _heap_end));
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	825 update_g1_committed(true);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	826 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	827 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	828
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	829 void ConcurrentMark::set_non_marking_state() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	830 // 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	831 // not doing marking.
7450 d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	832 reset_marking_state();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	833 _active_tasks = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	834 clear_concurrent_marking_in_progress();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	835 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	836
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	837 ConcurrentMark::~ConcurrentMark() {
4735 776173fc2df9 7125516: G1: ~ConcurrentMark() frees incorrectly stefank parents: 4728 diff changeset	838 // The ConcurrentMark instance is never freed.
776173fc2df9 7125516: G1: ~ConcurrentMark() frees incorrectly stefank parents: 4728 diff changeset	839 ShouldNotReachHere();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	840 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	841
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	842 void ConcurrentMark::clearNextBitmap() {
1359 23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	843 G1CollectedHeap* g1h = G1CollectedHeap::heap();
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	844 G1CollectorPolicy* g1p = g1h->g1_policy();
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	845
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	846 // 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	847 // the current cycle.
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	848 guarantee(cmThread()->during_cycle(), "invariant");
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	849
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	850 // 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	851 // 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	852 // 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	853 // is the case.
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	854 guarantee(!g1h->mark_in_progress(), "invariant");
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	855
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	856 // 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	857 // 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	858 // each chunk.
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	859 HeapWord* start = _nextMarkBitMap->startWord();
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	860 HeapWord* end = _nextMarkBitMap->endWord();
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	861 HeapWord* cur = start;
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	862 size_t chunkSize = M;
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	863 while (cur < end) {
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	864 HeapWord* next = cur + chunkSize;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	865 if (next > end) {
1359 23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	866 next = end;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	867 }
1359 23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	868 MemRegion mr(cur,next);
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	869 _nextMarkBitMap->clearRange(mr);
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	870 cur = next;
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	871 do_yield_check();
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	872
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	873 // 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	874 // 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	875 // 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	876 // clearing to get some checking in the product.
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	877 assert(cmThread()->during_cycle(), "invariant");
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	878 assert(!g1h->mark_in_progress(), "invariant");
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	879 }
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	880
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	881 // Clear the liveness counting data
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	882 clear_all_count_data();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	883
1359 23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	884 // Repeat the asserts from above.
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	885 guarantee(cmThread()->during_cycle(), "invariant");
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	886 guarantee(!g1h->mark_in_progress(), "invariant");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	887 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	888
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	889 class NoteStartOfMarkHRClosure: public HeapRegionClosure {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	890 public:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	891 bool doHeapRegion(HeapRegion* r) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	892 if (!r->continuesHumongous()) {
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	893 r->note_start_of_marking();
342 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 return false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	896 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	897 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	898
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	899 void ConcurrentMark::checkpointRootsInitialPre() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	900 G1CollectedHeap* g1h = G1CollectedHeap::heap();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	901 G1CollectorPolicy* g1p = g1h->g1_policy();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	902
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	903 _has_aborted = false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	904
1547 fb1a39993f69 6951319: enable solaris builds using Sun Studio 12 update 1 jcoomes parents: 1388 diff changeset	905 #ifndef PRODUCT
1044 6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	906 if (G1PrintReachableAtInitialMark) {
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	907 print_reachable("at-cycle-start",
3772 6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	908 VerifyOption_G1UsePrevMarking, true /* all */);
1044 6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	909 }
1547 fb1a39993f69 6951319: enable solaris builds using Sun Studio 12 update 1 jcoomes parents: 1388 diff changeset	910 #endif
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	911
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	912 // 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	913 reset();
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	914
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	915 // For each region note start of marking.
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	916 NoteStartOfMarkHRClosure startcl;
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	917 g1h->heap_region_iterate(&startcl);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	918 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	919
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	920
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	921 void ConcurrentMark::checkpointRootsInitialPost() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	922 G1CollectedHeap* g1h = G1CollectedHeap::heap();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	923
3316 cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	924 // 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	925 // 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	926 // 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	927 // 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	928 // 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	929 // 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	930 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	931
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	932 // Start Concurrent Marking weak-reference discovery.
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	933 ReferenceProcessor* rp = g1h->ref_processor_cm();
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	934 // enable ("weak") refs discovery
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	935 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	936 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	937
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	938 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	939 // 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	940 // 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	941 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	942 false /* expected_active */);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	943
4837 eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	944 _root_regions.prepare_for_scan();
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	945
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	946 // 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	947 // 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	948 // 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	949 // during it. No need to call it here.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	950 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	951
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	952 /*
3316 cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	953 * 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	954 * 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	955 * 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	956 * 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	957 * 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	958 * 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	959 *
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	960 * 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	961 * 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	962 * 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	963 * (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	964 * 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	965 *
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	966 * 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	967 * 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	968 * 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	969 * 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	970 * 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	971 */
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	972
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	973 void ConcurrentMark::enter_first_sync_barrier(uint worker_id) {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	974 if (verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	975 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	976 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	977
3316 cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	978 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	979 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	980 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	981 _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	982 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	983 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	984 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	985 // 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	986 // more work
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	987
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	988 if (verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	989 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	990 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	991
8788 e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	992 // 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	993 // 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	994 // during the remark pause.
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	995 // 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	996 // 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	997 // calls.
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	998 if (concurrent()) {
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	999 // 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	1000 if (worker_id == 0) {
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	1001 // 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	1002 // 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	1003 // 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	1004 // 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	1005 // marking.
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	1006 reset_marking_state(true /* clear_overflow */);
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	1007 force_overflow()->update();
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	1008
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	1009 if (G1Log::fine()) {
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	1010 gclog_or_tty->date_stamp(PrintGCDateStamps);
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	1011 gclog_or_tty->stamp(PrintGCTimeStamps);
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	1012 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	1013 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1014 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1015 }
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 // after this, each task should reset its own data structures then
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1018 // then go into the second barrier
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1019 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1020
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	1021 void ConcurrentMark::enter_second_sync_barrier(uint worker_id) {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	1022 if (verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	1023 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	1024 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1025
3316 cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1026 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	1027 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	1028 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1029 _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	1030 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	1031 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	1032 }
8788 e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	1033 // 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	1034
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	1035 if (verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	1036 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	1037 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1038 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1039
3316 cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1040 #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	1041 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	1042 _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	1043 _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	1044 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 }
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1046
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1047 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	1048 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	1049 _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	1050 _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	1051 } else {
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1052 _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	1053 }
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1054 }
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1055
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1056 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	1057 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	1058 _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	1059 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	1060 } else {
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1061 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	1062 }
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1063 }
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1064 #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	1065
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1066 class CMConcurrentMarkingTask: public AbstractGangTask {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1067 private:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1068 ConcurrentMark* _cm;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1069 ConcurrentMarkThread* _cmt;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1070
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1071 public:
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1072 void work(uint worker_id) {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	1073 assert(Thread::current()->is_ConcurrentGC_thread(),
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	1074 "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	1075 ResourceMark rm;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1076
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1077 double start_vtime = os::elapsedVTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1078
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1079 ConcurrentGCThread::stsJoin();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1080
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1081 assert(worker_id < _cm->active_tasks(), "invariant");
441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1082 CMTask* the_task = _cm->task(worker_id);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1083 the_task->record_start_time();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1084 if (!_cm->has_aborted()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1085 do {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1086 double start_vtime_sec = os::elapsedVTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1087 double start_time_sec = os::elapsedTime();
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	1088 double mark_step_duration_ms = G1ConcMarkStepDurationMillis;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	1089
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	1090 the_task->do_marking_step(mark_step_duration_ms,
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	1091 true /* do_termination */,
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	1092 false /* is_serial*/);
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	1093
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1094 double end_time_sec = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1095 double end_vtime_sec = os::elapsedVTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1096 double elapsed_vtime_sec = end_vtime_sec - start_vtime_sec;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1097 double elapsed_time_sec = end_time_sec - start_time_sec;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1098 _cm->clear_has_overflown();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1099
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1100 bool ret = _cm->do_yield_check(worker_id);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1101
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1102 jlong sleep_time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1103 if (!_cm->has_aborted() && the_task->has_aborted()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1104 sleep_time_ms =
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1105 (jlong) (elapsed_vtime_sec * _cm->sleep_factor() * 1000.0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1106 ConcurrentGCThread::stsLeave();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1107 os::sleep(Thread::current(), sleep_time_ms, false);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1108 ConcurrentGCThread::stsJoin();
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 double end_time2_sec = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1111 double elapsed_time2_sec = end_time2_sec - start_time_sec;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1112
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1113 #if 0
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1114 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	1115 "overhead %1.4lf",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1116 elapsed_vtime_sec * 1000.0, (double) sleep_time_ms,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1117 the_task->conc_overhead(os::elapsedTime()) * 8.0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1118 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	1119 elapsed_time_sec * 1000.0, elapsed_time2_sec * 1000.0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1120 #endif
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1121 } while (!_cm->has_aborted() && the_task->has_aborted());
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 the_task->record_end_time();
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	1124 guarantee(!the_task->has_aborted() \|\| _cm->has_aborted(), "invariant");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1125
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1126 ConcurrentGCThread::stsLeave();
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 double end_vtime = os::elapsedVTime();
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1129 _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	1130 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1131
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1132 CMConcurrentMarkingTask(ConcurrentMark* cm,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1133 ConcurrentMarkThread* cmt) :
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1134 AbstractGangTask("Concurrent Mark"), _cm(cm), _cmt(cmt) { }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1135
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1136 ~CMConcurrentMarkingTask() { }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1137 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1138
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1139 // Calculates the number of active workers for a concurrent
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1140 // phase.
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1141 uint ConcurrentMark::calc_parallel_marking_threads() {
4711 adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	1142 if (G1CollectedHeap::use_parallel_gc_threads()) {
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1143 uint n_conc_workers = 0;
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1144 if (!UseDynamicNumberOfGCThreads \|\|
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1145 (!FLAG_IS_DEFAULT(ConcGCThreads) &&
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1146 !ForceDynamicNumberOfGCThreads)) {
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1147 n_conc_workers = max_parallel_marking_threads();
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1148 } else {
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1149 n_conc_workers =
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1150 AdaptiveSizePolicy::calc_default_active_workers(
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1151 max_parallel_marking_threads(),
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1152 1, /* Minimum workers */
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1153 parallel_marking_threads(),
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1154 Threads::number_of_non_daemon_threads());
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1155 // 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	1156 // 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	1157 }
4711 adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	1158 assert(n_conc_workers > 0, "Always need at least 1");
adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	1159 return n_conc_workers;
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1160 }
4711 adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	1161 // 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	1162 // have spawned any marking threads either. Hence the number of
adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	1163 // concurrent workers should be 0.
adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	1164 return 0;
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1165 }
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1166
4837 eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1167 void ConcurrentMark::scanRootRegion(HeapRegion* hr, uint worker_id) {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1168 // Currently, only survivors can be root regions.
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1169 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	1170 G1RootRegionScanClosure cl(_g1h, this, worker_id);
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1171
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1172 const uintx interval = PrefetchScanIntervalInBytes;
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1173 HeapWord* curr = hr->bottom();
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1174 const HeapWord* end = hr->top();
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1175 while (curr < end) {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1176 Prefetch::read(curr, interval);
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1177 oop obj = oop(curr);
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1178 int size = obj->oop_iterate(&cl);
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1179 assert(size == obj->size(), "sanity");
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1180 curr += size;
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1181 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1182 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1183
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1184 class CMRootRegionScanTask : public AbstractGangTask {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1185 private:
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1186 ConcurrentMark* _cm;
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1187
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1188 public:
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1189 CMRootRegionScanTask(ConcurrentMark* cm) :
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1190 AbstractGangTask("Root Region Scan"), _cm(cm) { }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1191
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1192 void work(uint worker_id) {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1193 assert(Thread::current()->is_ConcurrentGC_thread(),
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1194 "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	1195
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1196 CMRootRegions* root_regions = _cm->root_regions();
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1197 HeapRegion* hr = root_regions->claim_next();
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1198 while (hr != NULL) {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1199 _cm->scanRootRegion(hr, worker_id);
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1200 hr = root_regions->claim_next();
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 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1203 };
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1204
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1205 void ConcurrentMark::scanRootRegions() {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1206 // 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	1207 // 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	1208 // should not attempt to do any further work.
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1209 if (root_regions()->scan_in_progress()) {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1210 _parallel_marking_threads = calc_parallel_marking_threads();
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1211 assert(parallel_marking_threads() <= max_parallel_marking_threads(),
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1212 "Maximum number of marking threads exceeded");
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1213 uint active_workers = MAX2(1U, parallel_marking_threads());
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1214
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1215 CMRootRegionScanTask task(this);
8008 256d3f43c177 8005875: G1: Kitchensink fails with ParallelGCThreads=0 johnc parents: 8006 diff changeset	1216 if (use_parallel_marking_threads()) {
4837 eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1217 _parallel_workers->set_active_workers((int) active_workers);
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1218 _parallel_workers->run_task(&task);
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1219 } else {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1220 task.work(0);
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1221 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1222
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1223 // 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	1224 // 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	1225 // mainly used for sanity checking.
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1226 root_regions()->scan_finished();
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1227 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1228 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1229
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1230 void ConcurrentMark::markFromRoots() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1231 // we might be tempted to assert that:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1232 // assert(asynch == !SafepointSynchronize::is_at_safepoint(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1233 // "inconsistent argument?");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1234 // However that wouldn't be right, because it's possible that
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1235 // a safepoint is indeed in progress as a younger generation
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1236 // 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	1237
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1238 _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	1239 force_overflow_conc()->init();
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1240
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1241 // _g1h has _n_par_threads
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1242 _parallel_marking_threads = calc_parallel_marking_threads();
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1243 assert(parallel_marking_threads() <= max_parallel_marking_threads(),
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1244 "Maximum number of marking threads exceeded");
4711 adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	1245
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1246 uint active_workers = MAX2(1U, parallel_marking_threads());
4711 adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	1247
8788 e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	1248 // 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	1249 set_concurrency_and_phase(active_workers, true /* concurrent */);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1250
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1251 CMConcurrentMarkingTask markingTask(this, cmThread());
8008 256d3f43c177 8005875: G1: Kitchensink fails with ParallelGCThreads=0 johnc parents: 8006 diff changeset	1252 if (use_parallel_marking_threads()) {
4711 adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	1253 _parallel_workers->set_active_workers((int)active_workers);
adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	1254 // 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	1255 // and the decisions on that MT processing is made elsewhere.
adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	1256 assert(_parallel_workers->active_workers() > 0, "Should have been set");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1257 _parallel_workers->run_task(&markingTask);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	1258 } else {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1259 markingTask.work(0);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	1260 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1261 print_stats();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1262 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1263
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1264 void ConcurrentMark::checkpointRootsFinal(bool clear_all_soft_refs) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1265 // world is stopped at this checkpoint
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1266 assert(SafepointSynchronize::is_at_safepoint(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1267 "world should be stopped");
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	1268
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1269 G1CollectedHeap* g1h = G1CollectedHeap::heap();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1270
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1271 // If a full collection has happened, we shouldn't do this.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1272 if (has_aborted()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1273 g1h->set_marking_complete(); // So bitmap clearing isn't confused
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1274 return;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1275 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1276
2125 7246a374a9f2 6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent kamg parents: 2037 diff changeset	1277 SvcGCMarker sgcm(SvcGCMarker::OTHER);
7246a374a9f2 6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent kamg parents: 2037 diff changeset	1278
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	1279 if (VerifyDuringGC) {
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	1280 HandleMark hm; // handle scope
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	1281 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	1282 Universe::verify(VerifyOption_G1UsePrevMarking,
b06ac540229e 8013132: Add a flag to turn off the output of the verbose verification code stefank parents: 9076 diff changeset	1283 " VerifyDuringGC:(before)");
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	1284 }
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	1285
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1286 G1CollectorPolicy* g1p = g1h->g1_policy();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1287 g1p->record_concurrent_mark_remark_start();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1288
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1289 double start = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1290
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1291 checkpointRootsFinalWork();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1292
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1293 double mark_work_end = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1294
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1295 weakRefsWork(clear_all_soft_refs);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1296
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1297 if (has_overflown()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1298 // Oops. We overflowed. Restart concurrent marking.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1299 _restart_for_overflow = true;
8789 1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure johnc parents: 8788 diff changeset	1300 if (G1TraceMarkStackOverflow) {
1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure johnc parents: 8788 diff changeset	1301 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	1302 }
1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure johnc parents: 8788 diff changeset	1303
1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure johnc parents: 8788 diff changeset	1304 // 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	1305 if (VerifyDuringGC) {
1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure johnc parents: 8788 diff changeset	1306 HandleMark hm; // handle scope
1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure johnc parents: 8788 diff changeset	1307 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	1308 Universe::verify(VerifyOption_G1UsePrevMarking,
b06ac540229e 8013132: Add a flag to turn off the output of the verbose verification code stefank parents: 9076 diff changeset	1309 " VerifyDuringGC:(overflow)");
8789 1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure johnc parents: 8788 diff changeset	1310 }
1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure johnc parents: 8788 diff changeset	1311
7450 d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	1312 // Clear the marking state because we will be restarting
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	1313 // marking due to overflowing the global mark stack.
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	1314 reset_marking_state();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1315 } else {
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1316 // 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	1317 // while marking.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1318 aggregate_count_data();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1319
2149 7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 2125 diff changeset	1320 SATBMarkQueueSet& satb_mq_set = JavaThread::satb_mark_queue_set();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1321 // We're done with marking.
1317 d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1314 diff changeset	1322 // 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	1323 // threads to have SATB queues with active set to true.
2149 7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 2125 diff changeset	1324 satb_mq_set.set_active_all_threads(false, /* new active value */
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 2125 diff changeset	1325 true /* expected_active */);
811 830ca2573896 6850846: G1: extend G1 marking verification tonyp parents: 751 diff changeset	1326
830ca2573896 6850846: G1: extend G1 marking verification tonyp parents: 751 diff changeset	1327 if (VerifyDuringGC) {
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	1328 HandleMark hm; // handle scope
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	1329 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	1330 Universe::verify(VerifyOption_G1UseNextMarking,
b06ac540229e 8013132: Add a flag to turn off the output of the verbose verification code stefank parents: 9076 diff changeset	1331 " VerifyDuringGC:(after)");
811 830ca2573896 6850846: G1: extend G1 marking verification tonyp parents: 751 diff changeset	1332 }
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	1333 assert(!restart_for_overflow(), "sanity");
7450 d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	1334 // Completely reset the marking state since marking completed
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	1335 set_non_marking_state();
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	1336 }
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	1337
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	1338 // 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	1339 if (_markStack.should_expand()) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	1340 _markStack.expand();
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	1341 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	1342
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1343 // Statistics
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1344 double now = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1345 _remark_mark_times.add((mark_work_end - start) * 1000.0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1346 _remark_weak_ref_times.add((now - mark_work_end) * 1000.0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1347 _remark_times.add((now - start) * 1000.0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1348
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1349 g1p->record_concurrent_mark_remark_end();
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	1350
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	1351 G1CMIsAliveClosure is_alive(g1h);
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	1352 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	1353 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1354
6027 8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1355 // 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	1356 // liveness counting data.
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1357 class CMCountDataClosureBase: public HeapRegionClosure {
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1358 protected:
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1359 G1CollectedHeap* _g1h;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1360 ConcurrentMark* _cm;
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1361 CardTableModRefBS* _ct_bs;
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1362
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1363 BitMap* _region_bm;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1364 BitMap* _card_bm;
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1365
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1366 // 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	1367 // 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	1368 // 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	1369 // 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	1370 // associated "continues humongous" regions.
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1371 void set_bit_for_region(HeapRegion* hr) {
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1372 assert(!hr->continuesHumongous(), "should have filtered those out");
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1373
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	1374 BitMap::idx_t index = (BitMap::idx_t) hr->hrs_index();
829 30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1375 if (!hr->startsHumongous()) {
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1376 // 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	1377 _region_bm->par_at_put(index, true);
829 30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1378 } else {
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1379 // 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	1380 // 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	1381 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	1382 _region_bm->par_at_put_range(index, end_index, true);
829 30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1383 }
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1384 }
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1385
6027 8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1386 public:
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1387 CMCountDataClosureBase(G1CollectedHeap* g1h,
6027 8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1388 BitMap* region_bm, BitMap* card_bm):
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1389 _g1h(g1h), _cm(g1h->concurrent_mark()),
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1390 _ct_bs((CardTableModRefBS*) (g1h->barrier_set())),
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1391 _region_bm(region_bm), _card_bm(card_bm) { }
6027 8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1392 };
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1393
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1394 // Closure that calculates the # live objects per region. Used
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1395 // for verification purposes during the cleanup pause.
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1396 class CalcLiveObjectsClosure: public CMCountDataClosureBase {
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1397 CMBitMapRO* _bm;
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1398 size_t _region_marked_bytes;
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1399
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1400 public:
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1401 CalcLiveObjectsClosure(CMBitMapRO bm, G1CollectedHeap g1h,
6027 8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1402 BitMap* region_bm, BitMap* card_bm) :
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1403 CMCountDataClosureBase(g1h, region_bm, card_bm),
6027 8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1404 _bm(bm), _region_marked_bytes(0) { }
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1405
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1406 bool doHeapRegion(HeapRegion* hr) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1407
639 922c573ea67d 6815683: G1: SEGV during marking iveresov parents: 619 diff changeset	1408 if (hr->continuesHumongous()) {
829 30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1409 // We will ignore these here and process them when their
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1410 // associated "starts humongous" region is processed (see
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1411 // 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	1412 // associated "starts humongous" region to have their bit set to
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1413 // 1 since, due to the region chunking in the parallel region
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1414 // iteration, a "continues humongous" region might be visited
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1415 // before its associated "starts humongous".
639 922c573ea67d 6815683: G1: SEGV during marking iveresov parents: 619 diff changeset	1416 return false;
922c573ea67d 6815683: G1: SEGV during marking iveresov parents: 619 diff changeset	1417 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1418
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1419 HeapWord* ntams = hr->next_top_at_mark_start();
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1420 HeapWord* start = hr->bottom();
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1421
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1422 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	1423 err_msg("Preconditions not met - "
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1424 "start: "PTR_FORMAT", ntams: "PTR_FORMAT", end: "PTR_FORMAT,
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1425 start, ntams, hr->end()));
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 // Find the first marked object at or after "start".
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1428 start = _bm->getNextMarkedWordAddress(start, ntams);
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1429
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1430 size_t marked_bytes = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1431
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1432 while (start < ntams) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1433 oop obj = oop(start);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1434 int obj_sz = obj->size();
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1435 HeapWord* obj_end = start + obj_sz;
6027 8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1436
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1437 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	1438 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	1439
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1440 // 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	1441 // 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	1442 // 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	1443 // just beyond the heap.
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1444 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	1445 // end of object is not card aligned - increment to cover
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1446 // all the cards spanned by the object
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1447 end_idx += 1;
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1448 }
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1449
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1450 // 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	1451 _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	1452
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1453 // 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	1454 marked_bytes += (size_t)obj_sz * HeapWordSize;
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1455
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1456 // Find the next marked object after this one.
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1457 start = _bm->getNextMarkedWordAddress(obj_end, ntams);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	1458 }
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1459
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1460 // Mark the allocated-since-marking portion...
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1461 HeapWord* top = hr->top();
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1462 if (ntams < top) {
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1463 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	1464 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	1465
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1466 // 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	1467 // 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	1468 // 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	1469 // just beyond the heap.
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1470 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	1471 // end of object is not card aligned - increment to cover
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1472 // all the cards spanned by the object
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1473 end_idx += 1;
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1474 }
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1475 _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	1476
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1477 // This definitely means the region has live objects.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1478 set_bit_for_region(hr);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1479 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1480
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1481 // Update the live region bitmap.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1482 if (marked_bytes > 0) {
829 30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1483 set_bit_for_region(hr);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1484 }
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1485
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1486 // 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	1487 // it can be queried by a calling verificiation routine
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1488 _region_marked_bytes = marked_bytes;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1489
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1490 return false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1491 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1492
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1493 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	1494 };
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1495
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1496 // Heap region closure used for verifying the counting data
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1497 // that was accumulated concurrently and aggregated during
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1498 // 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	1499 // regions during the STW cleanup pause.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1500
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1501 class VerifyLiveObjectDataHRClosure: public HeapRegionClosure {
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1502 G1CollectedHeap* _g1h;
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1503 ConcurrentMark* _cm;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1504 CalcLiveObjectsClosure _calc_cl;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1505 BitMap* _region_bm; // Region BM to be verified
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1506 BitMap* _card_bm; // Card BM to be verified
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1507 bool _verbose; // verbose output?
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 BitMap* _exp_region_bm; // Expected Region BM values
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1510 BitMap* _exp_card_bm; // Expected card BM values
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1511
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1512 int _failures;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1513
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1514 public:
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1515 VerifyLiveObjectDataHRClosure(G1CollectedHeap* g1h,
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1516 BitMap* region_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1517 BitMap* card_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1518 BitMap* exp_region_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1519 BitMap* exp_card_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1520 bool verbose) :
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1521 _g1h(g1h), _cm(g1h->concurrent_mark()),
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1522 _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	1523 _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	1524 _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	1525 _failures(0) { }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1526
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1527 int failures() const { return _failures; }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1528
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1529 bool doHeapRegion(HeapRegion* hr) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1530 if (hr->continuesHumongous()) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1531 // 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	1532 // associated "starts humongous" region is processed (see
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1533 // 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	1534 // 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	1535 // 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	1536 // iteration, a "continues humongous" region might be visited
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1537 // before its associated "starts humongous".
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1538 return false;
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
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1541 int failures = 0;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1542
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1543 // Call the CalcLiveObjectsClosure to walk the marking bitmap for
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1544 // 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	1545 // and card bitmaps.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1546 bool res = _calc_cl.doHeapRegion(hr);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1547 assert(res == false, "should be continuing");
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 MutexLockerEx x((_verbose ? ParGCRareEvent_lock : NULL),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1550 Mutex::_no_safepoint_check_flag);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1551
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1552 // Verify the marked bytes for this region.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1553 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	1554 size_t act_marked_bytes = hr->next_marked_bytes();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1555
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1556 // 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	1557 // 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	1558 if (exp_marked_bytes > act_marked_bytes) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1559 if (_verbose) {
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	1560 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	1561 "expected: " SIZE_FORMAT ", actual: " SIZE_FORMAT,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1562 hr->hrs_index(), exp_marked_bytes, act_marked_bytes);
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 failures += 1;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1565 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1566
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1567 // 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	1568 // (which was just calculated) region bit maps.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1569 // 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	1570 // 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	1571 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	1572
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1573 bool expected = _exp_region_bm->at(index);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1574 bool actual = _region_bm->at(index);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1575 if (expected && !actual) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1576 if (_verbose) {
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	1577 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	1578 "expected: %s, actual: %s",
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	1579 hr->hrs_index(),
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	1580 BOOL_TO_STR(expected), BOOL_TO_STR(actual));
4836 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 failures += 1;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1583 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1584
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1585 // 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	1586 // 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	1587 // 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	1588
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1589 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	1590 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	1591
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1592 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	1593 expected = _exp_card_bm->at(i);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1594 actual = _card_bm->at(i);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1595
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1596 if (expected && !actual) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1597 if (_verbose) {
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	1598 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	1599 "expected: %s, actual: %s",
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	1600 hr->hrs_index(), i,
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	1601 BOOL_TO_STR(expected), BOOL_TO_STR(actual));
4836 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 failures += 1;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1604 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1605 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1606
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1607 if (failures > 0 && _verbose) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1608 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	1609 "marked_bytes: calc/actual " SIZE_FORMAT "/" SIZE_FORMAT,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1610 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	1611 _calc_cl.region_marked_bytes(), hr->next_marked_bytes());
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
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1614 _failures += failures;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1615
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1616 // 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	1617 // find the first violating region by returning true.
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1618 return false;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1619 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1620 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1621
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1622 class G1ParVerifyFinalCountTask: public AbstractGangTask {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1623 protected:
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1624 G1CollectedHeap* _g1h;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1625 ConcurrentMark* _cm;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1626 BitMap* _actual_region_bm;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1627 BitMap* _actual_card_bm;
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 uint _n_workers;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1630
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1631 BitMap* _expected_region_bm;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1632 BitMap* _expected_card_bm;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1633
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1634 int _failures;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1635 bool _verbose;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1636
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1637 public:
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1638 G1ParVerifyFinalCountTask(G1CollectedHeap* g1h,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1639 BitMap* region_bm, BitMap* card_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1640 BitMap* expected_region_bm, BitMap* expected_card_bm)
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1641 : AbstractGangTask("G1 verify final counting"),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1642 _g1h(g1h), _cm(_g1h->concurrent_mark()),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1643 _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	1644 _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	1645 _failures(0), _verbose(false),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1646 _n_workers(0) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1647 assert(VerifyDuringGC, "don't call this otherwise");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1648
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1649 // 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	1650 // in the call to run_task().
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1651 if (G1CollectedHeap::use_parallel_gc_threads()) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1652 assert( _g1h->workers()->active_workers() > 0,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1653 "Should have been previously set");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1654 _n_workers = _g1h->workers()->active_workers();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1655 } else {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1656 _n_workers = 1;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1657 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1658
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1659 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	1660 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	1661
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1662 _verbose = _cm->verbose_medium();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1663 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1664
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1665 void work(uint worker_id) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1666 assert(worker_id < _n_workers, "invariant");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1667
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1668 VerifyLiveObjectDataHRClosure verify_cl(_g1h,
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1669 _actual_region_bm, _actual_card_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1670 _expected_region_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1671 _expected_card_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1672 _verbose);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1673
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1674 if (G1CollectedHeap::use_parallel_gc_threads()) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1675 _g1h->heap_region_par_iterate_chunked(&verify_cl,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1676 worker_id,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1677 _n_workers,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1678 HeapRegion::VerifyCountClaimValue);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1679 } else {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1680 _g1h->heap_region_iterate(&verify_cl);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1681 }
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 Atomic::add(verify_cl.failures(), &_failures);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1684 }
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 int failures() const { return _failures; }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1687 };
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1688
6027 8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1689 // Closure that finalizes the liveness counting data.
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1690 // Used during the cleanup pause.
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1691 // Sets the bits corresponding to the interval [NTAMS, top]
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1692 // (which contains the implicitly live objects) in the
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1693 // 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	1694 // containing live data, in the region liveness bitmap.
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1695
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1696 class FinalCountDataUpdateClosure: public CMCountDataClosureBase {
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1697 public:
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1698 FinalCountDataUpdateClosure(G1CollectedHeap* g1h,
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1699 BitMap* region_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1700 BitMap* card_bm) :
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1701 CMCountDataClosureBase(g1h, region_bm, card_bm) { }
4836 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 bool doHeapRegion(HeapRegion* hr) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1704
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1705 if (hr->continuesHumongous()) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1706 // 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	1707 // associated "starts humongous" region is processed (see
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1708 // 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	1709 // 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	1710 // 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	1711 // iteration, a "continues humongous" region might be visited
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1712 // before its associated "starts humongous".
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1713 return false;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1714 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1715
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1716 HeapWord* ntams = hr->next_top_at_mark_start();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1717 HeapWord* top = hr->top();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1718
6027 8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1719 assert(hr->bottom() <= ntams && ntams <= hr->end(), "Preconditions.");
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1720
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1721 // Mark the allocated-since-marking portion...
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1722 if (ntams < top) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1723 // This definitely means the region has live objects.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1724 set_bit_for_region(hr);
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1725
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1726 // 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	1727 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	1728 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	1729
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1730 // 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	1731 // 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	1732 // 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	1733 // just beyond the heap.
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1734 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	1735 // end of object is not card aligned - increment to cover
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1736 // all the cards spanned by the object
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1737 end_idx += 1;
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1738 }
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1739
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1740 assert(end_idx <= _card_bm->size(),
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1741 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	1742 end_idx, _card_bm->size()));
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1743 assert(start_idx < _card_bm->size(),
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1744 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	1745 start_idx, _card_bm->size()));
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1746
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1747 _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	1748 }
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1749
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1750 // 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	1751 if (hr->next_marked_bytes() > 0) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1752 set_bit_for_region(hr);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1753 }
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 return false;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1756 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1757 };
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1758
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1759 class G1ParFinalCountTask: public AbstractGangTask {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1760 protected:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1761 G1CollectedHeap* _g1h;
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1762 ConcurrentMark* _cm;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1763 BitMap* _actual_region_bm;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1764 BitMap* _actual_card_bm;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1765
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1766 uint _n_workers;
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1767
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1768 public:
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1769 G1ParFinalCountTask(G1CollectedHeap* g1h, BitMap* region_bm, BitMap* card_bm)
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1770 : AbstractGangTask("G1 final counting"),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1771 _g1h(g1h), _cm(_g1h->concurrent_mark()),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1772 _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	1773 _n_workers(0) {
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1774 // 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	1775 // in the call to run_task().
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1776 if (G1CollectedHeap::use_parallel_gc_threads()) {
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1777 assert( _g1h->workers()->active_workers() > 0,
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1778 "Should have been previously set");
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1779 _n_workers = _g1h->workers()->active_workers();
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	1780 } else {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1781 _n_workers = 1;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	1782 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1783 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1784
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1785 void work(uint worker_id) {
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1786 assert(worker_id < _n_workers, "invariant");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1787
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1788 FinalCountDataUpdateClosure final_update_cl(_g1h,
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1789 _actual_region_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1790 _actual_card_bm);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1791
1833 8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1719 diff changeset	1792 if (G1CollectedHeap::use_parallel_gc_threads()) {
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1793 _g1h->heap_region_par_iterate_chunked(&final_update_cl,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1794 worker_id,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1795 _n_workers,
355 0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 343 diff changeset	1796 HeapRegion::FinalCountClaimValue);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1797 } else {
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1798 _g1h->heap_region_iterate(&final_update_cl);
342 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 };
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 G1ParNoteEndTask;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1804
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1805 class G1NoteEndOfConcMarkClosure : public HeapRegionClosure {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1806 G1CollectedHeap* _g1;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1807 int _worker_num;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1808 size_t _max_live_bytes;
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	1809 uint _regions_claimed;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1810 size_t _freed_bytes;
2173 97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1811 FreeRegionList* _local_cleanup_list;
4072 8aae2050e83e 7092309: G1: introduce old region set tonyp parents: 4013 diff changeset	1812 OldRegionSet* _old_proxy_set;
2173 97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1813 HumongousRegionSet* _humongous_proxy_set;
97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1814 HRRSCleanupTask* _hrrs_cleanup_task;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1815 double _claimed_region_time;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1816 double _max_region_time;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1817
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1818 public:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1819 G1NoteEndOfConcMarkClosure(G1CollectedHeap* g1,
2173 97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1820 int worker_num,
97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1821 FreeRegionList* local_cleanup_list,
4072 8aae2050e83e 7092309: G1: introduce old region set tonyp parents: 4013 diff changeset	1822 OldRegionSet* old_proxy_set,
2173 97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1823 HumongousRegionSet* humongous_proxy_set,
4093 6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	1824 HRRSCleanupTask* hrrs_cleanup_task) :
6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	1825 _g1(g1), _worker_num(worker_num),
6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	1826 _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	1827 _freed_bytes(0),
6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	1828 _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	1829 _local_cleanup_list(local_cleanup_list),
6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	1830 _old_proxy_set(old_proxy_set),
6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	1831 _humongous_proxy_set(humongous_proxy_set),
6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	1832 _hrrs_cleanup_task(hrrs_cleanup_task) { }
6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	1833
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1834 size_t freed_bytes() { return _freed_bytes; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1835
4093 6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	1836 bool doHeapRegion(HeapRegion *hr) {
6254 a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1837 if (hr->continuesHumongous()) {
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1838 return false;
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1839 }
4093 6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	1840 // 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	1841 // 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	1842 _g1->reset_gc_time_stamps(hr);
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1843 double start = os::elapsedTime();
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1844 _regions_claimed++;
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1845 hr->note_end_of_marking();
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1846 _max_live_bytes += hr->max_live_bytes();
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1847 _g1->free_region_if_empty(hr,
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1848 &_freed_bytes,
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1849 _local_cleanup_list,
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1850 _old_proxy_set,
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1851 _humongous_proxy_set,
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1852 _hrrs_cleanup_task,
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1853 true /* par */);
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1854 double region_time = (os::elapsedTime() - start);
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1855 _claimed_region_time += region_time;
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1856 if (region_time > _max_region_time) {
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1857 _max_region_time = region_time;
4093 6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	1858 }
6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	1859 return false;
6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	1860 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1861
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1862 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	1863 uint regions_claimed() { return _regions_claimed; }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1864 double claimed_region_time_sec() { return _claimed_region_time; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1865 double max_region_time_sec() { return _max_region_time; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1866 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1867
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1868 class G1ParNoteEndTask: public AbstractGangTask {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1869 friend class G1NoteEndOfConcMarkClosure;
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	1870
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1871 protected:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1872 G1CollectedHeap* _g1h;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1873 size_t _max_live_bytes;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1874 size_t _freed_bytes;
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	1875 FreeRegionList* _cleanup_list;
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	1876
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1877 public:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1878 G1ParNoteEndTask(G1CollectedHeap* g1h,
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	1879 FreeRegionList* cleanup_list) :
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1880 AbstractGangTask("G1 note end"), _g1h(g1h),
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	1881 _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	1882
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1883 void work(uint worker_id) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1884 double start = os::elapsedTime();
2173 97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1885 FreeRegionList local_cleanup_list("Local Cleanup List");
4072 8aae2050e83e 7092309: G1: introduce old region set tonyp parents: 4013 diff changeset	1886 OldRegionSet old_proxy_set("Local Cleanup Old Proxy Set");
2173 97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1887 HumongousRegionSet humongous_proxy_set("Local Cleanup Humongous Proxy Set");
97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1888 HRRSCleanupTask hrrs_cleanup_task;
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1889 G1NoteEndOfConcMarkClosure g1_note_end(_g1h, worker_id, &local_cleanup_list,
4072 8aae2050e83e 7092309: G1: introduce old region set tonyp parents: 4013 diff changeset	1890 &old_proxy_set,
2173 97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1891 &humongous_proxy_set,
97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1892 &hrrs_cleanup_task);
1833 8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1719 diff changeset	1893 if (G1CollectedHeap::use_parallel_gc_threads()) {
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1894 _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	1895 _g1h->workers()->active_workers(),
355 0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 343 diff changeset	1896 HeapRegion::NoteEndClaimValue);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1897 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1898 _g1h->heap_region_iterate(&g1_note_end);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1899 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1900 assert(g1_note_end.complete(), "Shouldn't have yielded!");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1901
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	1902 // Now update the lists
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	1903 _g1h->update_sets_after_freeing_regions(g1_note_end.freed_bytes(),
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	1904 NULL /* free_list */,
4072 8aae2050e83e 7092309: G1: introduce old region set tonyp parents: 4013 diff changeset	1905 &old_proxy_set,
2173 97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1906 &humongous_proxy_set,
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	1907 true /* par */);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1908 {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1909 MutexLockerEx x(ParGCRareEvent_lock, Mutex::_no_safepoint_check_flag);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1910 _max_live_bytes += g1_note_end.max_live_bytes();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1911 _freed_bytes += g1_note_end.freed_bytes();
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	1912
3778 5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3776 diff changeset	1913 // 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	1914 // 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	1915 // generate output for the newly-reclaimed regions (the list
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3776 diff changeset	1916 // 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	1917 // 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	1918 // 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	1919 // cleanup list.
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3776 diff changeset	1920
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3776 diff changeset	1921 G1HRPrinter* hr_printer = _g1h->hr_printer();
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3776 diff changeset	1922 if (hr_printer->is_active()) {
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3776 diff changeset	1923 HeapRegionLinkedListIterator iter(&local_cleanup_list);
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3776 diff changeset	1924 while (iter.more_available()) {
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3776 diff changeset	1925 HeapRegion* hr = iter.get_next();
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3776 diff changeset	1926 hr_printer->cleanup(hr);
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3776 diff changeset	1927 }
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3776 diff changeset	1928 }
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3776 diff changeset	1929
2173 97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1930 _cleanup_list->add_as_tail(&local_cleanup_list);
97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1931 assert(local_cleanup_list.is_empty(), "post-condition");
97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1932
97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1933 HeapRegionRemSet::finish_cleanup_task(&hrrs_cleanup_task);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1934 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1935 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1936 size_t max_live_bytes() { return _max_live_bytes; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1937 size_t freed_bytes() { return _freed_bytes; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1938 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1939
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1940 class G1ParScrubRemSetTask: public AbstractGangTask {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1941 protected:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1942 G1RemSet* _g1rs;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1943 BitMap* _region_bm;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1944 BitMap* _card_bm;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1945 public:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1946 G1ParScrubRemSetTask(G1CollectedHeap* g1h,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1947 BitMap* region_bm, BitMap* card_bm) :
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1948 AbstractGangTask("G1 ScrubRS"), _g1rs(g1h->g1_rem_set()),
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1949 _region_bm(region_bm), _card_bm(card_bm) { }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1950
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1951 void work(uint worker_id) {
1833 8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1719 diff changeset	1952 if (G1CollectedHeap::use_parallel_gc_threads()) {
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1953 _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	1954 HeapRegion::ScrubRemSetClaimValue);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1955 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1956 _g1rs->scrub(_region_bm, _card_bm);
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 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1961
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1962 void ConcurrentMark::cleanup() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1963 // world is stopped at this checkpoint
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1964 assert(SafepointSynchronize::is_at_safepoint(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1965 "world should be stopped");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1966 G1CollectedHeap* g1h = G1CollectedHeap::heap();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1967
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1968 // If a full collection has happened, we shouldn't do this.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1969 if (has_aborted()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1970 g1h->set_marking_complete(); // So bitmap clearing isn't confused
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1971 return;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1972 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1973
4072 8aae2050e83e 7092309: G1: introduce old region set tonyp parents: 4013 diff changeset	1974 HRSPhaseSetter x(HRSPhaseCleanup);
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	1975 g1h->verify_region_sets_optional();
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	1976
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	1977 if (VerifyDuringGC) {
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	1978 HandleMark hm; // handle scope
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	1979 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	1980 Universe::verify(VerifyOption_G1UsePrevMarking,
b06ac540229e 8013132: Add a flag to turn off the output of the verbose verification code stefank parents: 9076 diff changeset	1981 " VerifyDuringGC:(before)");
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	1982 }
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	1983
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1984 G1CollectorPolicy* g1p = G1CollectedHeap::heap()->g1_policy();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1985 g1p->record_concurrent_mark_cleanup_start();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1986
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1987 double start = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1988
2173 97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1989 HeapRegionRemSet::reset_for_cleanup_tasks();
97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1990
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1991 uint n_workers;
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1992
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1993 // 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	1994 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	1995
1833 8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1719 diff changeset	1996 if (G1CollectedHeap::use_parallel_gc_threads()) {
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1997 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	1998 "sanity check");
0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 343 diff changeset	1999
4711 adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	2000 g1h->set_par_threads();
adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	2001 n_workers = g1h->n_par_threads();
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	2002 assert(g1h->n_par_threads() == n_workers,
4711 adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	2003 "Should not have been reset");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2004 g1h->workers()->run_task(&g1_par_count_task);
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2005 // Done with the parallel phase so reset to 0.
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2006 g1h->set_par_threads(0);
355 0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 343 diff changeset	2007
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2008 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	2009 "sanity check");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2010 } else {
4711 adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	2011 n_workers = 1;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2012 g1_par_count_task.work(0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2013 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2014
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2015 if (VerifyDuringGC) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2016 // Verify that the counting data accumulated during marking matches
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2017 // that calculated by walking the marking bitmap.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2018
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2019 // Bitmaps to hold expected values
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2020 BitMap expected_region_bm(_region_bm.size(), false);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2021 BitMap expected_card_bm(_card_bm.size(), false);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2022
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2023 G1ParVerifyFinalCountTask g1_par_verify_task(g1h,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2024 &_region_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2025 &_card_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2026 &expected_region_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2027 &expected_card_bm);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2028
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2029 if (G1CollectedHeap::use_parallel_gc_threads()) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2030 g1h->set_par_threads((int)n_workers);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2031 g1h->workers()->run_task(&g1_par_verify_task);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2032 // Done with the parallel phase so reset to 0.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2033 g1h->set_par_threads(0);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2034
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2035 assert(g1h->check_heap_region_claim_values(HeapRegion::VerifyCountClaimValue),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2036 "sanity check");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2037 } else {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2038 g1_par_verify_task.work(0);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2039 }
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 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	2042 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2043
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2044 size_t start_used_bytes = g1h->used();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2045 g1h->set_marking_complete();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2046
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2047 double count_end = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2048 double this_final_counting_time = (count_end - start);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2049 _total_counting_time += this_final_counting_time;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2050
2435 371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	2051 if (G1PrintRegionLivenessInfo) {
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	2052 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	2053 _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	2054 }
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	2055
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2056 // Install newly created mark bitMap as "prev".
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2057 swapMarkBitMaps();
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 g1h->reset_gc_time_stamp();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2060
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2061 // Note end of marking in all heap regions.
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2062 G1ParNoteEndTask g1_par_note_end_task(g1h, &_cleanup_list);
1833 8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1719 diff changeset	2063 if (G1CollectedHeap::use_parallel_gc_threads()) {
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2064 g1h->set_par_threads((int)n_workers);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2065 g1h->workers()->run_task(&g1_par_note_end_task);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2066 g1h->set_par_threads(0);
355 0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 343 diff changeset	2067
0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 343 diff changeset	2068 assert(g1h->check_heap_region_claim_values(HeapRegion::NoteEndClaimValue),
0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 343 diff changeset	2069 "sanity check");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2070 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2071 g1_par_note_end_task.work(0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2072 }
6254 a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	2073 g1h->check_gc_time_stamps();
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2074
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2075 if (!cleanup_list_is_empty()) {
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2076 // 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	2077 // concurrently. Notify anyone else that might be wanting free
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2078 // regions that there will be more free regions coming soon.
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2079 g1h->set_free_regions_coming();
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2080 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2081
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2082 // 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	2083 // regions.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2084 if (G1ScrubRemSets) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2085 double rs_scrub_start = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2086 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	2087 if (G1CollectedHeap::use_parallel_gc_threads()) {
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2088 g1h->set_par_threads((int)n_workers);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2089 g1h->workers()->run_task(&g1_par_scrub_rs_task);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2090 g1h->set_par_threads(0);
355 0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 343 diff changeset	2091
0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 343 diff changeset	2092 assert(g1h->check_heap_region_claim_values(
0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 343 diff changeset	2093 HeapRegion::ScrubRemSetClaimValue),
0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 343 diff changeset	2094 "sanity check");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2095 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2096 g1_par_scrub_rs_task.work(0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2097 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2098
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2099 double rs_scrub_end = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2100 double this_rs_scrub_time = (rs_scrub_end - rs_scrub_start);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2101 _total_rs_scrub_time += this_rs_scrub_time;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2102 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2103
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2104 // this will also free any regions totally full of garbage objects,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2105 // and sort the regions.
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2106 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	2107
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2108 // Statistics.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2109 double end = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2110 _cleanup_times.add((end - start) * 1000.0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2111
6007 5c86f8211d1e 7160728: Introduce an extra logging level for G1 logging brutisso parents: 5988 diff changeset	2112 if (G1Log::fine()) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2113 g1h->print_size_transition(gclog_or_tty,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2114 start_used_bytes,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2115 g1h->used(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2116 g1h->capacity());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2117 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2118
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2119 // Clean up will have freed any regions completely full of garbage.
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2120 // Update the soft reference policy with the new heap occupancy.
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2121 Universe::update_heap_info_at_gc();
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2122
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2123 // 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	2124 // races with it goes around and waits for completeCleanup to finish.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2125 g1h->increment_total_collections();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2126
4830 0b3d1ec6eaee 7097586: G1: improve the per-space output when using jmap -heap tonyp parents: 4828 diff changeset	2127 // 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	2128 // 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	2129 g1h->g1mm()->update_sizes();
0b3d1ec6eaee 7097586: G1: improve the per-space output when using jmap -heap tonyp parents: 4828 diff changeset	2130
751 20c6f43950b5 6490395: G1: Tidy up command line flags. johnc parents: 647 diff changeset	2131 if (VerifyDuringGC) {
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	2132 HandleMark hm; // handle scope
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	2133 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	2134 Universe::verify(VerifyOption_G1UsePrevMarking,
b06ac540229e 8013132: Add a flag to turn off the output of the verbose verification code stefank parents: 9076 diff changeset	2135 " VerifyDuringGC:(after)");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2136 }
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2137
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2138 g1h->verify_region_sets_optional();
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	2139 g1h->trace_heap_after_concurrent_cycle();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2140 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2141
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2142 void ConcurrentMark::completeCleanup() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2143 if (has_aborted()) return;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2144
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2145 G1CollectedHeap* g1h = G1CollectedHeap::heap();
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2146
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2147 _cleanup_list.verify_optional();
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2177 diff changeset	2148 FreeRegionList tmp_free_list("Tmp Free List");
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2149
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2150 if (G1ConcRegionFreeingVerbose) {
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2151 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	2152 "cleanup list has %u entries",
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2153 _cleanup_list.length());
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2154 }
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2155
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2156 // Noone else should be accessing the _cleanup_list at this point,
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2157 // so it's not necessary to take any locks
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2158 while (!_cleanup_list.is_empty()) {
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2159 HeapRegion* hr = _cleanup_list.remove_head();
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2160 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	2161 hr->par_clear();
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2177 diff changeset	2162 tmp_free_list.add_as_tail(hr);
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2163
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2164 // 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	2165 // 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	2166 // 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	2167 // 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	2168 // _cleanup_list is empty (which means we just removed the last
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2169 // region from the _cleanup_list).
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2177 diff changeset	2170 if ((tmp_free_list.length() % G1SecondaryFreeListAppendLength == 0) \|\|
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2171 _cleanup_list.is_empty()) {
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2172 if (G1ConcRegionFreeingVerbose) {
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2173 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	2174 "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	2175 "cleanup list still has %u entries",
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2177 diff changeset	2176 tmp_free_list.length(),
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2177 _cleanup_list.length());
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2178 }
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2179
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2180 {
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2181 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag);
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2177 diff changeset	2182 g1h->secondary_free_list_add_as_tail(&tmp_free_list);
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2183 SecondaryFreeList_lock->notify_all();
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2184 }
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2185
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2186 if (G1StressConcRegionFreeing) {
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2187 for (uintx i = 0; i < G1StressConcRegionFreeingDelayMillis; ++i) {
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2188 os::sleep(Thread::current(), (jlong) 1, false);
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2189 }
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2190 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2191 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2192 }
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2177 diff changeset	2193 assert(tmp_free_list.is_empty(), "post-condition");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2194 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2195
8014 f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2196 // Supporting Object and Oop closures for reference discovery
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2197 // and processing in during marking
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2198
2037 b03260081e9b 7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field johnc parents: 1974 diff changeset	2199 bool G1CMIsAliveClosure::do_object_b(oop obj) {
b03260081e9b 7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field johnc parents: 1974 diff changeset	2200 HeapWord* addr = (HeapWord*)obj;
b03260081e9b 7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field johnc parents: 1974 diff changeset	2201 return addr != NULL &&
b03260081e9b 7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field johnc parents: 1974 diff changeset	2202 (!_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	2203 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2204
8014 f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2205 // '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	2206 // 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	2207 // 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	2208 // trace referent objects.
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2209 //
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2210 // 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	2211 // 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	2212 // 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	2213 // 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	2214 // 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	2215 // operating on the global stack.
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2216
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2217 class G1CMKeepAliveAndDrainClosure: public OopClosure {
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2218 ConcurrentMark* _cm;
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2219 CMTask* _task;
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2220 int _ref_counter_limit;
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2221 int _ref_counter;
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2222 bool _is_serial;
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2223 public:
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2224 G1CMKeepAliveAndDrainClosure(ConcurrentMark* cm, CMTask* task, bool is_serial) :
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2225 _cm(cm), _task(task), _is_serial(is_serial),
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2226 _ref_counter_limit(G1RefProcDrainInterval) {
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2227 assert(_ref_counter_limit > 0, "sanity");
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2228 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	2229 _ref_counter = _ref_counter_limit;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2230 }
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2231
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2232 virtual void do_oop(narrowOop* p) { do_oop_work(p); }
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2233 virtual void do_oop( oop* p) { do_oop_work(p); }
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2234
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2235 template <class T> void do_oop_work(T* p) {
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2236 if (!_cm->has_overflown()) {
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2237 oop obj = oopDesc::load_decode_heap_oop(p);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	2238 if (_cm->verbose_high()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	2239 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	2240 "*"PTR_FORMAT" = "PTR_FORMAT,
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	2241 _task->worker_id(), p, (void*) obj);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	2242 }
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2243
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2244 _task->deal_with_reference(obj);
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2245 _ref_counter--;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2246
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2247 if (_ref_counter == 0) {
8014 f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2248 // 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	2249 // 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	2250 // 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	2251 // process these entries.
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2252 //
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2253 // 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	2254 // 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	2255 // 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	2256 // above) or we overflow.
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2257 //
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2258 // 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	2259 // 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	2260 // 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	2261 // 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	2262 // 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	2263 // has_aborted() flag that the marking step has completed.
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2264 do {
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2265 double mark_step_duration_ms = G1ConcMarkStepDurationMillis;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2266 _task->do_marking_step(mark_step_duration_ms,
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2267 false /* do_termination */,
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2268 _is_serial);
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2269 } while (_task->has_aborted() && !_cm->has_overflown());
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2270 _ref_counter = _ref_counter_limit;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2271 }
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2272 } else {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	2273 if (_cm->verbose_high()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	2274 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	2275 }
2174 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 }
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2278 };
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2279
8014 f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2280 // '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	2281 // 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	2282 // 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	2283 // 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	2284 // 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	2285 // added by the 'keep alive' oop closure above.
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2286
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2287 class G1CMDrainMarkingStackClosure: public VoidClosure {
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2288 ConcurrentMark* _cm;
8014 f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2289 CMTask* _task;
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2290 bool _is_serial;
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2291 public:
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2292 G1CMDrainMarkingStackClosure(ConcurrentMark* cm, CMTask* task, bool is_serial) :
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2293 _cm(cm), _task(task), _is_serial(is_serial) {
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2294 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	2295 }
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2296
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2297 void do_void() {
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2298 do {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	2299 if (_cm->verbose_high()) {
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2300 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	2301 _task->worker_id(), BOOL_TO_STR(_is_serial));
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	2302 }
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2303
8014 f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2304 // 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	2305 // 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	2306 // oop closure (an instance of G1CMKeepAliveAndDrainClosure above).
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2307 //
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2308 // 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	2309 // 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	2310 // 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	2311 // 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	2312 // the global marking stack.
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2313 //
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2314 // 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	2315 // 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	2316 // 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	2317 // 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	2318 // 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	2319 // has_aborted() flag that the marking step has completed.
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2320
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2321 _task->do_marking_step(1000000000.0 /* something very large */,
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2322 true /* do_termination */,
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2323 _is_serial);
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2324 } while (_task->has_aborted() && !_cm->has_overflown());
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2325 }
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2326 };
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2327
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2328 // Implementation of AbstractRefProcTaskExecutor for parallel
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2329 // reference processing at the end of G1 concurrent marking
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2330
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2331 class G1CMRefProcTaskExecutor: public AbstractRefProcTaskExecutor {
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2332 private:
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2333 G1CollectedHeap* _g1h;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2334 ConcurrentMark* _cm;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2335 WorkGang* _workers;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2336 int _active_workers;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2337
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2338 public:
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2339 G1CMRefProcTaskExecutor(G1CollectedHeap* g1h,
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2340 ConcurrentMark* cm,
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2341 WorkGang* workers,
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2342 int n_workers) :
4093 6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	2343 _g1h(g1h), _cm(cm),
6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	2344 _workers(workers), _active_workers(n_workers) { }
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2345
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2346 // Executes the given task using concurrent marking worker threads.
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2347 virtual void execute(ProcessTask& task);
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2348 virtual void execute(EnqueueTask& task);
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2349 };
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2350
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2351 class G1CMRefProcTaskProxy: public AbstractGangTask {
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2352 typedef AbstractRefProcTaskExecutor::ProcessTask ProcessTask;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2353 ProcessTask& _proc_task;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2354 G1CollectedHeap* _g1h;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2355 ConcurrentMark* _cm;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2356
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2357 public:
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2358 G1CMRefProcTaskProxy(ProcessTask& proc_task,
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2359 G1CollectedHeap* g1h,
4093 6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	2360 ConcurrentMark* cm) :
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2361 AbstractGangTask("Process reference objects in parallel"),
8014 f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2362 _proc_task(proc_task), _g1h(g1h), _cm(cm) {
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2363 ReferenceProcessor* rp = _g1h->ref_processor_cm();
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2364 assert(rp->processing_is_mt(), "shouldn't be here otherwise");
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2365 }
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2366
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	2367 virtual void work(uint worker_id) {
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2368 CMTask* task = _cm->task(worker_id);
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2369 G1CMIsAliveClosure g1_is_alive(_g1h);
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2370 G1CMKeepAliveAndDrainClosure g1_par_keep_alive(_cm, task, false /* is_serial */);
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2371 G1CMDrainMarkingStackClosure g1_par_drain(_cm, task, false /* is_serial */);
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2372
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	2373 _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	2374 }
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2375 };
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2376
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2377 void G1CMRefProcTaskExecutor::execute(ProcessTask& proc_task) {
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2378 assert(_workers != NULL, "Need parallel worker threads.");
8014 f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2379 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	2380
4093 6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	2381 G1CMRefProcTaskProxy proc_task_proxy(proc_task, _g1h, _cm);
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2382
8788 e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2383 // 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	2384 // proxy task execution, so that the termination protocol
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2385 // 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	2386 // how many workers to wait for.
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2387 _cm->set_concurrency(_active_workers);
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2388 _g1h->set_par_threads(_active_workers);
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2389 _workers->run_task(&proc_task_proxy);
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2390 _g1h->set_par_threads(0);
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2391 }
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2392
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2393 class G1CMRefEnqueueTaskProxy: public AbstractGangTask {
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2394 typedef AbstractRefProcTaskExecutor::EnqueueTask EnqueueTask;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2395 EnqueueTask& _enq_task;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2396
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2397 public:
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2398 G1CMRefEnqueueTaskProxy(EnqueueTask& enq_task) :
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2399 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	2400 _enq_task(enq_task) { }
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2401
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	2402 virtual void work(uint worker_id) {
441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	2403 _enq_task.work(worker_id);
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2404 }
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2405 };
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2406
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2407 void G1CMRefProcTaskExecutor::execute(EnqueueTask& enq_task) {
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2408 assert(_workers != NULL, "Need parallel worker threads.");
8014 f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2409 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	2410
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2411 G1CMRefEnqueueTaskProxy enq_task_proxy(enq_task);
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2412
8788 e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2413 // Not strictly necessary but...
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2414 //
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2415 // 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	2416 // proxy task execution, so that the termination protocol
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2417 // 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	2418 // how many workers to wait for.
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2419 _cm->set_concurrency(_active_workers);
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2420 _g1h->set_par_threads(_active_workers);
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2421 _workers->run_task(&enq_task_proxy);
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2422 _g1h->set_par_threads(0);
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2423 }
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2424
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2425 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	2426 if (has_overflown()) {
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2427 // Skip processing the discovered references if we have
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2428 // overflown the global marking stack. Reference objects
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2429 // 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	2430 // 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	2431 // 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	2432 // less reference objects are discovered.
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2433 return;
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2434 }
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2435
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2436 ResourceMark rm;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2437 HandleMark hm;
3975 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 G1CollectedHeap* g1h = G1CollectedHeap::heap();
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2440
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2441 // Is alive closure.
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2442 G1CMIsAliveClosure g1_is_alive(g1h);
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2443
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2444 // 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	2445 // tables from the displayed time.
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2446 {
6007 5c86f8211d1e 7160728: Introduce an extra logging level for G1 logging brutisso parents: 5988 diff changeset	2447 if (G1Log::finer()) {
3975 1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2448 gclog_or_tty->put(' ');
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2449 }
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	2450 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	2451
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2452 ReferenceProcessor* rp = g1h->ref_processor_cm();
3975 1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2453
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2454 // See the comment in G1CollectedHeap::ref_processing_init()
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2455 // about how reference processing currently works in G1.
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2456
8014 f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2457 // Set the soft reference policy
3975 1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2458 rp->setup_policy(clear_all_soft_refs);
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2459 assert(_markStack.isEmpty(), "mark stack should be empty");
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2460
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2461 // Instances of the 'Keep Alive' and 'Complete GC' closures used
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2462 // in serial reference processing. Note these closures are also
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2463 // used for serially processing (by the the current thread) the
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2464 // JNI references during parallel reference processing.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2465 //
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2466 // These closures do not need to synchronize with the worker
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2467 // threads involved in parallel reference processing as these
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2468 // instances are executed serially by the current thread (e.g.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2469 // reference processing is not multi-threaded and is thus
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2470 // performed by the current thread instead of a gang worker).
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2471 //
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2472 // The gang tasks involved in parallel reference procssing create
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2473 // their own instances of these closures, which do their own
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2474 // synchronization among themselves.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2475 G1CMKeepAliveAndDrainClosure g1_keep_alive(this, task(0), true /* is_serial */);
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2476 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	2477
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2478 // We need at least one active thread. If reference processing
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2479 // is not multi-threaded we use the current (VMThread) thread,
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2480 // otherwise we use the work gang from the G1CollectedHeap and
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2481 // we utilize all the worker threads we can.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2482 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	2483 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	2484 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	2485
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2486 // Parallel processing task executor.
4093 6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	2487 G1CMRefProcTaskExecutor par_task_executor(g1h, this,
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2488 g1h->workers(), active_workers);
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2489 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	2490
8788 e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2491 // 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	2492 // executing the remark task.
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2493 set_concurrency(active_workers);
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2494
8014 f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2495 // 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	2496 // 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	2497 // 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	2498 // 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	2499 rp->set_active_mt_degree(active_workers);
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2500
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2501 // Process the weak references.
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	2502 const ReferenceProcessorStats& stats =
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	2503 rp->process_discovered_references(&g1_is_alive,
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	2504 &g1_keep_alive,
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	2505 &g1_drain_mark_stack,
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	2506 executor,
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	2507 g1h->gc_timer_cm());
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	2508 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	2509
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2510 // 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	2511 // 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	2512 // global marking stack.
3975 1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2513
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2514 assert(_markStack.overflow() \|\| _markStack.isEmpty(),
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2515 "mark stack should be empty (unless it overflowed)");
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2516
3975 1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2517 if (_markStack.overflow()) {
8014 f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2518 // 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	2519 // 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	2520 set_has_overflown();
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2521 }
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2522
8014 f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2523 assert(rp->num_q() == active_workers, "why not");
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2524
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2525 rp->enqueue_discovered_references(executor);
3975 1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2526
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2527 rp->verify_no_references_recorded();
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2528 assert(!rp->discovery_enabled(), "Post condition");
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2529 }
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2530
14304 a2866d45e99e 8027454: Do not traverse string table during G1 remark when treating them as strong roots during initial mark tschatzl parents: 14303 diff changeset	2531 g1h->unlink_string_and_symbol_table(&g1_is_alive,
a2866d45e99e 8027454: Do not traverse string table during G1 remark when treating them as strong roots during initial mark tschatzl parents: 14303 diff changeset	2532 /* process_strings */ false, // currently strings are always roots
a2866d45e99e 8027454: Do not traverse string table during G1 remark when treating them as strong roots during initial mark tschatzl parents: 14303 diff changeset	2533 /* process_symbols */ true);
342 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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2536 void ConcurrentMark::swapMarkBitMaps() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2537 CMBitMapRO* temp = _prevMarkBitMap;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2538 _prevMarkBitMap = (CMBitMapRO*)_nextMarkBitMap;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2539 _nextMarkBitMap = (CMBitMap*) temp;
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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2542 class CMRemarkTask: public AbstractGangTask {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2543 private:
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2544 ConcurrentMark* _cm;
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2545 bool _is_serial;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2546 public:
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	2547 void work(uint worker_id) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2548 // Since all available tasks are actually started, we should
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2549 // 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	2550 if (worker_id < _cm->active_tasks()) {
441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	2551 CMTask* task = _cm->task(worker_id);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2552 task->record_start_time();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2553 do {
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2554 task->do_marking_step(1000000000.0 /* something very large */,
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2555 true /* do_termination */,
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2556 _is_serial);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2557 } while (task->has_aborted() && !_cm->has_overflown());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2558 // 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	2559 // want to abort remark and do concurrent marking again.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2560 task->record_end_time();
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 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2563
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2564 CMRemarkTask(ConcurrentMark* cm, int active_workers, bool is_serial) :
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2565 AbstractGangTask("Par Remark"), _cm(cm), _is_serial(is_serial) {
4711 adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	2566 _cm->terminator()->reset_for_reuse(active_workers);
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2567 }
342 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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2570 void ConcurrentMark::checkpointRootsFinalWork() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2571 ResourceMark rm;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2572 HandleMark hm;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2573 G1CollectedHeap* g1h = G1CollectedHeap::heap();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2574
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2575 g1h->ensure_parsability(false);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2576
1833 8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1719 diff changeset	2577 if (G1CollectedHeap::use_parallel_gc_threads()) {
989 148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 912 diff changeset	2578 G1CollectedHeap::StrongRootsScope srs(g1h);
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2579 // 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	2580 uint active_workers = g1h->workers()->active_workers();
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2581 if (active_workers == 0) {
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2582 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	2583 active_workers = (uint) ParallelGCThreads;
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2584 g1h->workers()->set_active_workers(active_workers);
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2585 }
8788 e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2586 set_concurrency_and_phase(active_workers, false /* concurrent */);
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2587 // Leave _parallel_marking_threads at it's
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2588 // value originally calculated in the ConcurrentMark
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2589 // constructor and pass values of the active workers
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2590 // through the gang in the task.
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2591
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2592 CMRemarkTask remarkTask(this, active_workers, false /* is_serial */);
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2593 // 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	2594 // 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	2595 // immediately.
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2596 g1h->set_par_threads(active_workers);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2597 g1h->workers()->run_task(&remarkTask);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2598 g1h->set_par_threads(0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2599 } else {
989 148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 912 diff changeset	2600 G1CollectedHeap::StrongRootsScope srs(g1h);
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	2601 uint active_workers = 1;
8788 e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2602 set_concurrency_and_phase(active_workers, false /* concurrent */);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2603
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2604 // 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	2605 // the thread to execute the remark - serially. We have
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2606 // to pass true for the is_serial parameter so that
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2607 // CMTask::do_marking_step() doesn't enter the sync
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2608 // barriers in the event of an overflow. Doing so will
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2609 // cause an assert that the current thread is not a
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2610 // concurrent GC thread.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2611 CMRemarkTask remarkTask(this, active_workers, true /* is_serial*/);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2612 remarkTask.work(0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2613 }
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	2614 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	2615 guarantee(has_overflown() \|\|
1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure johnc parents: 8788 diff changeset	2616 satb_mq_set.completed_buffers_num() == 0,
1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure johnc parents: 8788 diff changeset	2617 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	2618 BOOL_TO_STR(has_overflown()),
1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure johnc parents: 8788 diff changeset	2619 satb_mq_set.completed_buffers_num()));
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2620
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2621 print_stats();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2622 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2623
1044 6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2624 #ifndef PRODUCT
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2625
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2626 class PrintReachableOopClosure: public OopClosure {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2627 private:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2628 G1CollectedHeap* _g1h;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2629 outputStream* _out;
3772 6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2630 VerifyOption _vo;
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2631 bool _all;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2632
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2633 public:
3772 6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2634 PrintReachableOopClosure(outputStream* out,
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2635 VerifyOption vo,
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2636 bool all) :
1044 6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2637 _g1h(G1CollectedHeap::heap()),
3772 6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2638 _out(out), _vo(vo), _all(all) { }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2639
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	2640 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	2641 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	2642
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	2643 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	2644 oop obj = oopDesc::load_decode_heap_oop(p);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2645 const char* str = NULL;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2646 const char* str2 = "";
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2647
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2648 if (obj == NULL) {
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2649 str = "";
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2650 } else if (!_g1h->is_in_g1_reserved(obj)) {
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2651 str = " O";
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2652 } else {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2653 HeapRegion* hr = _g1h->heap_region_containing(obj);
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	2654 guarantee(hr != NULL, "invariant");
6254 a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	2655 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	2656 bool marked = _g1h->is_marked(obj, _vo);
1044 6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2657
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2658 if (over_tams) {
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2659 str = " >";
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2660 if (marked) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2661 str2 = " AND MARKED";
1044 6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2662 }
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2663 } else if (marked) {
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2664 str = " M";
1044 6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2665 } else {
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2666 str = " NOT";
1044 6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2667 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2668 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2669
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2670 _out->print_cr(" "PTR_FORMAT": "PTR_FORMAT"%s%s",
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2671 p, (void*) obj, str, str2);
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 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2674
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2675 class PrintReachableObjectClosure : public ObjectClosure {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2676 private:
3772 6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2677 G1CollectedHeap* _g1h;
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2678 outputStream* _out;
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2679 VerifyOption _vo;
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2680 bool _all;
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2681 HeapRegion* _hr;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2682
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2683 public:
3772 6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2684 PrintReachableObjectClosure(outputStream* out,
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2685 VerifyOption vo,
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2686 bool all,
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2687 HeapRegion* hr) :
3772 6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2688 _g1h(G1CollectedHeap::heap()),
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2689 _out(out), _vo(vo), _all(all), _hr(hr) { }
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2690
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2691 void do_object(oop o) {
6254 a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	2692 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	2693 bool marked = _g1h->is_marked(o, _vo);
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2694 bool print_it = _all \|\| over_tams \|\| marked;
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2695
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2696 if (print_it) {
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2697 _out->print_cr(" "PTR_FORMAT"%s",
12316 190899198332 7195622: CheckUnhandledOops has limited usefulness now hseigel parents: 12229 diff changeset	2698 (void *)o, (over_tams) ? " >" : (marked) ? " M" : "");
3772 6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2699 PrintReachableOopClosure oopCl(_out, _vo, _all);
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6254 diff changeset	2700 o->oop_iterate_no_header(&oopCl);
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2701 }
342 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 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2704
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2705 class PrintReachableRegionClosure : public HeapRegionClosure {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2706 private:
6254 a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	2707 G1CollectedHeap* _g1h;
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	2708 outputStream* _out;
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	2709 VerifyOption _vo;
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	2710 bool _all;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2711
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2712 public:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2713 bool doHeapRegion(HeapRegion* hr) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2714 HeapWord* b = hr->bottom();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2715 HeapWord* e = hr->end();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2716 HeapWord* t = hr->top();
6254 a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	2717 HeapWord* p = _g1h->top_at_mark_start(hr, _vo);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2718 _out->print_cr("** ["PTR_FORMAT", "PTR_FORMAT"] top: "PTR_FORMAT" "
1044 6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2719 "TAMS: "PTR_FORMAT, b, e, t, p);
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2720 _out->cr();
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2721
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2722 HeapWord* from = b;
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2723 HeapWord* to = t;
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2724
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2725 if (to > from) {
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2726 _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	2727 _out->cr();
3772 6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2728 PrintReachableObjectClosure ocl(_out, _vo, _all, hr);
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2729 hr->object_iterate_mem_careful(MemRegion(from, to), &ocl);
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2730 _out->cr();
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2731 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2732
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2733 return false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2734 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2735
3772 6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2736 PrintReachableRegionClosure(outputStream* out,
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2737 VerifyOption vo,
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2738 bool all) :
6254 a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	2739 _g1h(G1CollectedHeap::heap()), _out(out), _vo(vo), _all(all) { }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2740 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2741
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2742 void ConcurrentMark::print_reachable(const char* str,
3772 6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2743 VerifyOption vo,
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2744 bool all) {
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2745 gclog_or_tty->cr();
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2746 gclog_or_tty->print_cr("== Doing heap dump... ");
1044 6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2747
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2748 if (G1PrintReachableBaseFile == NULL) {
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2749 gclog_or_tty->print_cr(" #### error: no base file defined");
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2750 return;
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
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2753 if (strlen(G1PrintReachableBaseFile) + 1 + strlen(str) >
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2754 (JVM_MAXPATHLEN - 1)) {
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2755 gclog_or_tty->print_cr(" #### error: file name too long");
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2756 return;
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
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2759 char file_name[JVM_MAXPATHLEN];
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2760 sprintf(file_name, "%s.%s", G1PrintReachableBaseFile, str);
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2761 gclog_or_tty->print_cr(" dumping to file %s", file_name);
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2762
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2763 fileStream fout(file_name);
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2764 if (!fout.is_open()) {
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2765 gclog_or_tty->print_cr(" #### error: could not open file");
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2766 return;
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
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2769 outputStream* out = &fout;
6254 a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	2770 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	2771 out->cr();
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2772
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2773 out->print_cr("--- ITERATING OVER REGIONS");
1044 6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2774 out->cr();
3772 6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2775 PrintReachableRegionClosure rcl(out, vo, all);
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2776 _g1h->heap_region_iterate(&rcl);
1044 6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2777 out->cr();
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2778
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2779 gclog_or_tty->print_cr(" done");
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2780 gclog_or_tty->flush();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2781 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2782
1044 6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2783 #endif // PRODUCT
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2784
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2785 void ConcurrentMark::clearRangePrevBitmap(MemRegion mr) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2786 // 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	2787 // the cast.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2788 ((CMBitMap*)_prevMarkBitMap)->clearRange(mr);
4787 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
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2791 void ConcurrentMark::clearRangeNextBitmap(MemRegion mr) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2792 _nextMarkBitMap->clearRange(mr);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2793 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2794
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2795 void ConcurrentMark::clearRangeBothBitmaps(MemRegion mr) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2796 clearRangePrevBitmap(mr);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2797 clearRangeNextBitmap(mr);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2798 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2799
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2800 HeapRegion*
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	2801 ConcurrentMark::claim_region(uint worker_id) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2802 // "checkpoint" the finger
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2803 HeapWord* finger = _finger;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2804
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2805 // _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	2806 // yield points.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2807 while (finger < _heap_end) {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	2808 assert(_g1h->is_in_g1_reserved(finger), "invariant");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2809
3771 842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2810 // Note on how this code handles humongous regions. In the
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2811 // normal case the finger will reach the start of a "starts
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2812 // humongous" (SH) region. Its end will either be the end of the
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2813 // last "continues humongous" (CH) region in the sequence, or the
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2814 // 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	2815 // the sequence). That way claim_region() will skip over the CH
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2816 // regions. However, there is a subtle race between a CM thread
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2817 // executing this method and a mutator thread doing a humongous
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2818 // object allocation. The two are not mutually exclusive as the CM
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2819 // thread does not need to hold the Heap_lock when it gets
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2820 // here. So there is a chance that claim_region() will come across
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2821 // 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	2822 // region. In the former case, it will either
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2823 // 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	2824 // visit every subsequent CH region, will find their bitmaps
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2825 // empty, and do nothing, or
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2826 // b) Will observe the update of the region's end (in which case
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2827 // it will skip the subsequent CH regions).
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2828 // If it comes across a region that suddenly becomes CH, the
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2829 // scenario will be similar to b). So, the race between
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2830 // claim_region() and a humongous object allocation might force us
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2831 // to do a bit of unnecessary work (due to some unnecessary bitmap
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2832 // iterations) but it should not introduce and correctness issues.
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2833 HeapRegion* curr_region = _g1h->heap_region_containing_raw(finger);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2834 HeapWord* bottom = curr_region->bottom();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2835 HeapWord* end = curr_region->end();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2836 HeapWord* limit = curr_region->next_top_at_mark_start();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2837
3771 842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2838 if (verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	2839 gclog_or_tty->print_cr("[%u] curr_region = "PTR_FORMAT" "
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2840 "["PTR_FORMAT", "PTR_FORMAT"), "
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2841 "limit = "PTR_FORMAT,
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	2842 worker_id, curr_region, bottom, end, limit);
3771 842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2843 }
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2844
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2845 // Is the gap between reading the finger and doing the CAS too long?
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2846 HeapWord* res = (HeapWord*) Atomic::cmpxchg_ptr(end, &_finger, finger);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2847 if (res == finger) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2848 // we succeeded
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2849
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2850 // notice that _finger == end cannot be guaranteed here since,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2851 // someone else might have moved the finger even further
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	2852 assert(_finger >= end, "the finger should have moved forward");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2853
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	2854 if (verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	2855 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	2856 PTR_FORMAT, worker_id, curr_region);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	2857 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2858
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2859 if (limit > bottom) {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	2860 if (verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	2861 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	2862 "returning it ", worker_id, curr_region);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	2863 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2864 return curr_region;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2865 } else {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	2866 assert(limit == bottom,
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	2867 "the region limit should be at bottom");
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	2868 if (verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	2869 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	2870 "returning NULL", worker_id, curr_region);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	2871 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2872 // we return NULL and the caller should try calling
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2873 // claim_region() again.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2874 return NULL;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2875 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2876 } else {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	2877 assert(_finger > finger, "the finger should have moved forward");
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	2878 if (verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	2879 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	2880 "global finger = "PTR_FORMAT", "
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2881 "our finger = "PTR_FORMAT,
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	2882 worker_id, _finger, finger);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	2883 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2884
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2885 // read it again
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2886 finger = _finger;
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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2890 return NULL;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2891 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2892
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2893 #ifndef PRODUCT
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2894 enum VerifyNoCSetOopsPhase {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2895 VerifyNoCSetOopsStack,
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2896 VerifyNoCSetOopsQueues,
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2897 VerifyNoCSetOopsSATBCompleted,
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2898 VerifyNoCSetOopsSATBThread
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
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2901 class VerifyNoCSetOopsClosure : public OopClosure, public ObjectClosure {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2902 private:
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2903 G1CollectedHeap* _g1h;
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2904 VerifyNoCSetOopsPhase _phase;
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2905 int _info;
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2906
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2907 const char* phase_str() {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2908 switch (_phase) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2909 case VerifyNoCSetOopsStack: return "Stack";
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2910 case VerifyNoCSetOopsQueues: return "Queue";
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2911 case VerifyNoCSetOopsSATBCompleted: return "Completed SATB Buffers";
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2912 case VerifyNoCSetOopsSATBThread: return "Thread SATB Buffers";
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2913 default: ShouldNotReachHere();
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2914 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2915 return NULL;
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
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2918 void do_object_work(oop obj) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2919 guarantee(!_g1h->obj_in_cs(obj),
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2920 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	2921 (void*) obj, phase_str(), _info));
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
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2924 public:
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2925 VerifyNoCSetOopsClosure() : _g1h(G1CollectedHeap::heap()) { }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2926
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2927 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	2928 _phase = phase;
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2929 _info = info;
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
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2932 virtual void do_oop(oop* p) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2933 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	2934 do_object_work(obj);
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
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2937 virtual void do_oop(narrowOop* p) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2938 // 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	2939 // stacks and SATB buffers.
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2940 ShouldNotReachHere();
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
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2943 virtual void do_object(oop obj) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2944 do_object_work(obj);
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
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2948 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	2949 bool verify_enqueued_buffers,
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2950 bool verify_thread_buffers,
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2951 bool verify_fingers) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2952 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	2953 if (!G1CollectedHeap::heap()->mark_in_progress()) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2954 return;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2955 }
1835 4805b9f4779e 6941395: G1: Use only lock-free versions of region stack push() and pop() johnc parents: 1833 diff changeset	2956
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2957 VerifyNoCSetOopsClosure cl;
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2958
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2959 if (verify_stacks) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2960 // Verify entries on the global mark stack
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2961 cl.set_phase(VerifyNoCSetOopsStack);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2962 _markStack.oops_do(&cl);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2963
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2964 // 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	2965 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	2966 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	2967 CMTaskQueue* queue = _task_queues->queue(i);
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2968 queue->oops_do(&cl);
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
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2972 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	2973
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2974 // Verify entries on the enqueued SATB buffers
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2975 if (verify_enqueued_buffers) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2976 cl.set_phase(VerifyNoCSetOopsSATBCompleted);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2977 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	2978 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2979
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2980 // 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	2981 if (verify_thread_buffers) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2982 cl.set_phase(VerifyNoCSetOopsSATBThread);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2983 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	2984 }
4805b9f4779e 6941395: G1: Use only lock-free versions of region stack push() and pop() johnc parents: 1833 diff changeset	2985
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2986 if (verify_fingers) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2987 // Verify the global finger
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2988 HeapWord* global_finger = finger();
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2989 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	2990 // 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	2991 // 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	2992 // 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	2993 // which subsequently becomes continues humongous. If that
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2994 // 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	2995 // 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	2996 // not hold any more.
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2997 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	2998 guarantee(global_finger == global_hr->bottom(),
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2999 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	3000 global_finger, HR_FORMAT_PARAMS(global_hr)));
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
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3003 // Verify the task fingers
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3004 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	3005 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	3006 CMTask* task = _tasks[i];
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3007 HeapWord* task_finger = task->finger();
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3008 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	3009 // 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	3010 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	3011 guarantee(task_finger == task_hr->bottom() \|\|
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3012 !task_hr->in_collection_set(),
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3013 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	3014 task_finger, HR_FORMAT_PARAMS(task_hr)));
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 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3017 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3018 }
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3019 #endif // PRODUCT
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3020
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3021 // Aggregate the counting data that was constructed concurrently
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3022 // with marking.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3023 class AggregateCountDataHRClosure: public HeapRegionClosure {
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	3024 G1CollectedHeap* _g1h;
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3025 ConcurrentMark* _cm;
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	3026 CardTableModRefBS* _ct_bs;
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3027 BitMap* _cm_card_bm;
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3028 uint _max_worker_id;
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3029
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3030 public:
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	3031 AggregateCountDataHRClosure(G1CollectedHeap* g1h,
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3032 BitMap* cm_card_bm,
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3033 uint max_worker_id) :
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	3034 _g1h(g1h), _cm(g1h->concurrent_mark()),
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	3035 _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	3036 _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	3037
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3038 bool doHeapRegion(HeapRegion* hr) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3039 if (hr->continuesHumongous()) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3040 // 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	3041 // associated "starts humongous" region is processed.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3042 // Note that we cannot rely on their associated
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3043 // "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	3044 // 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	3045 // iteration, a "continues humongous" region might be visited
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3046 // before its associated "starts humongous".
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3047 return false;
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
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3050 HeapWord* start = hr->bottom();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3051 HeapWord* limit = hr->next_top_at_mark_start();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3052 HeapWord* end = hr->end();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3053
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3054 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	3055 err_msg("Preconditions not met - "
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3056 "start: "PTR_FORMAT", limit: "PTR_FORMAT", "
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3057 "top: "PTR_FORMAT", end: "PTR_FORMAT,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3058 start, limit, hr->top(), hr->end()));
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3059
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3060 assert(hr->next_marked_bytes() == 0, "Precondition");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3061
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3062 if (start == limit) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3063 // 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	3064 return false;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3065 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3066
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	3067 // 'start' should be in the heap.
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	3068 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	3069 // '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	3070 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	3071
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3072 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	3073 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	3074 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	3075
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	3076 // 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	3077 // 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	3078 // the object ending at ntams.
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	3079 // 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	3080 // 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	3081 // limit_idx will then correspond to a (non-existent) card
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	3082 // that is also outside the heap.
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	3083 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	3084 limit_idx += 1;
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
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3087 assert(limit_idx <= end_idx, "or else use atomics");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3088
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3089 // 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	3090 uint hrs_index = hr->hrs_index();
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3091 size_t marked_bytes = 0;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3092
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3093 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	3094 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	3095 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	3096
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3097 // 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	3098 // add it to the running total for this region.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3099 marked_bytes += marked_bytes_array[hrs_index];
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3100
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3101 // 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	3102 // into the global card bitmap.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3103 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	3104
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3105 while (scan_idx < limit_idx) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3106 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	3107 _cm_card_bm->set_bit(scan_idx);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3108 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	3109
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3110 // 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	3111 // 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	3112 // 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	3113 // 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	3114 // passed in for left offset here.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3115 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	3116 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	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
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3120 // Update the marked bytes for this region.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3121 hr->add_to_marked_bytes(marked_bytes);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3122
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3123 // Next heap region
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3124 return false;
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
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3128 class G1AggregateCountDataTask: public AbstractGangTask {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3129 protected:
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3130 G1CollectedHeap* _g1h;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3131 ConcurrentMark* _cm;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3132 BitMap* _cm_card_bm;
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3133 uint _max_worker_id;
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3134 int _active_workers;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3135
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3136 public:
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3137 G1AggregateCountDataTask(G1CollectedHeap* g1h,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3138 ConcurrentMark* cm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3139 BitMap* cm_card_bm,
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3140 uint max_worker_id,
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3141 int n_workers) :
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3142 AbstractGangTask("Count Aggregation"),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3143 _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	3144 _max_worker_id(max_worker_id),
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3145 _active_workers(n_workers) { }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3146
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3147 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	3148 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	3149
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3150 if (G1CollectedHeap::use_parallel_gc_threads()) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3151 _g1h->heap_region_par_iterate_chunked(&cl, worker_id,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3152 _active_workers,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3153 HeapRegion::AggregateCountClaimValue);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3154 } else {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3155 _g1h->heap_region_iterate(&cl);
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
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3161 void ConcurrentMark::aggregate_count_data() {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3162 int n_workers = (G1CollectedHeap::use_parallel_gc_threads() ?
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3163 _g1h->workers()->active_workers() :
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3164 1);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3165
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3166 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	3167 _max_worker_id, n_workers);
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3168
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3169 if (G1CollectedHeap::use_parallel_gc_threads()) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3170 assert(_g1h->check_heap_region_claim_values(HeapRegion::InitialClaimValue),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3171 "sanity check");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3172 _g1h->set_par_threads(n_workers);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3173 _g1h->workers()->run_task(&g1_par_agg_task);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3174 _g1h->set_par_threads(0);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3175
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3176 assert(_g1h->check_heap_region_claim_values(HeapRegion::AggregateCountClaimValue),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3177 "sanity check");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3178 _g1h->reset_heap_region_claim_values();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3179 } else {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3180 g1_par_agg_task.work(0);
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
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3184 // 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	3185 void ConcurrentMark::clear_all_count_data() {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3186 // 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	3187 // liveness count aggregation (during remark) and the
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3188 // final counting task.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3189 _card_bm.clear();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3190
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3191 // 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	3192 // of the final counting task.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3193 _region_bm.clear();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3194
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	3195 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	3196 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	3197
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3198 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	3199 BitMap* task_card_bm = count_card_bitmap_for(i);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3200 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	3201
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3202 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	3203 assert(marked_bytes_array != NULL, "uninitialized");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3204
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	3205 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	3206 task_card_bm->clear();
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 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3209
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3210 void ConcurrentMark::print_stats() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3211 if (verbose_stats()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3212 gclog_or_tty->print_cr("---------------------------------------------------------------------");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3213 for (size_t i = 0; i < _active_tasks; ++i) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3214 _tasks[i]->print_stats();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3215 gclog_or_tty->print_cr("---------------------------------------------------------------------");
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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3220 // abandon current marking iteration due to a Full GC
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3221 void ConcurrentMark::abort() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3222 // Clear all marks to force marking thread to do nothing
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3223 _nextMarkBitMap->clearAll();
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3224 // Clear the liveness counting data
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3225 clear_all_count_data();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3226 // Empty mark stack
7450 d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	3227 reset_marking_state();
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3228 for (uint i = 0; i < _max_worker_id; ++i) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3229 _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	3230 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3231 _has_aborted = true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3232
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3233 SATBMarkQueueSet& satb_mq_set = JavaThread::satb_mark_queue_set();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3234 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	3235 // 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	3236 // 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	3237 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	3238 false, /* new active value */
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1314 diff changeset	3239 satb_mq_set.is_active() /* expected_active */);
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	3240
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	3241 _g1h->trace_heap_after_concurrent_cycle();
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	3242 _g1h->register_concurrent_cycle_end();
342 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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3245 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	3246 NumberSeq& ns) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3247 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	3248 prefix, ns.num(), name, ns.sum()/1000.0, ns.avg());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3249 if (ns.num() > 0) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3250 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	3251 prefix, ns.sd(), ns.maximum());
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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3255 void ConcurrentMark::print_summary_info() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3256 gclog_or_tty->print_cr(" Concurrent marking:");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3257 print_ms_time_info(" ", "init marks", _init_times);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3258 print_ms_time_info(" ", "remarks", _remark_times);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3259 {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3260 print_ms_time_info(" ", "final marks", _remark_mark_times);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3261 print_ms_time_info(" ", "weak refs", _remark_weak_ref_times);
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 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3264 print_ms_time_info(" ", "cleanups", _cleanup_times);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3265 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	3266 _total_counting_time,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3267 (_cleanup_times.num() > 0 ? _total_counting_time * 1000.0 /
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3268 (double)_cleanup_times.num()
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3269 : 0.0));
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3270 if (G1ScrubRemSets) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3271 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	3272 _total_rs_scrub_time,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3273 (_cleanup_times.num() > 0 ? _total_rs_scrub_time * 1000.0 /
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3274 (double)_cleanup_times.num()
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3275 : 0.0));
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3276 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3277 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	3278 (_init_times.sum() + _remark_times.sum() +
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3279 _cleanup_times.sum())/1000.0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3280 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	3281 "(%8.2f s marking).",
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3282 cmThread()->vtime_accum(),
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3283 cmThread()->vtime_mark_accum());
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3284 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3285
1019 035d2e036a9b 6885041: G1: inconsistent thread dump tonyp parents: 993 diff changeset	3286 void ConcurrentMark::print_worker_threads_on(outputStream* st) const {
8008 256d3f43c177 8005875: G1: Kitchensink fails with ParallelGCThreads=0 johnc parents: 8006 diff changeset	3287 if (use_parallel_marking_threads()) {
256d3f43c177 8005875: G1: Kitchensink fails with ParallelGCThreads=0 johnc parents: 8006 diff changeset	3288 _parallel_workers->print_worker_threads_on(st);
256d3f43c177 8005875: G1: Kitchensink fails with ParallelGCThreads=0 johnc parents: 8006 diff changeset	3289 }
1019 035d2e036a9b 6885041: G1: inconsistent thread dump tonyp parents: 993 diff changeset	3290 }
035d2e036a9b 6885041: G1: inconsistent thread dump tonyp parents: 993 diff changeset	3291
9076 7b835924c31c 8011872: Include Bit Map addresses in the hs_err files stefank parents: 8789 diff changeset	3292 void ConcurrentMark::print_on_error(outputStream* st) const {
7b835924c31c 8011872: Include Bit Map addresses in the hs_err files stefank parents: 8789 diff changeset	3293 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	3294 _prevMarkBitMap, _nextMarkBitMap);
7b835924c31c 8011872: Include Bit Map addresses in the hs_err files stefank parents: 8789 diff changeset	3295 _prevMarkBitMap->print_on_error(st, " Prev Bits: ");
7b835924c31c 8011872: Include Bit Map addresses in the hs_err files stefank parents: 8789 diff changeset	3296 _nextMarkBitMap->print_on_error(st, " Next Bits: ");
7b835924c31c 8011872: Include Bit Map addresses in the hs_err files stefank parents: 8789 diff changeset	3297 }
7b835924c31c 8011872: Include Bit Map addresses in the hs_err files stefank parents: 8789 diff changeset	3298
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3299 // 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	3300 bool ConcurrentMark::do_yield_check(uint worker_id) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3301 if (should_yield()) {
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	3302 if (worker_id == 0) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3303 _g1h->g1_policy()->record_concurrent_pause();
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3304 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3305 cmThread()->yield();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3306 return true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3307 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3308 return false;
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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3312 bool ConcurrentMark::should_yield() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3313 return cmThread()->should_yield();
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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3316 bool ConcurrentMark::containing_card_is_marked(void* p) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3317 size_t offset = pointer_delta(p, _g1h->reserved_region().start(), 1);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3318 return _card_bm.at(offset >> CardTableModRefBS::card_shift);
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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3321 bool ConcurrentMark::containing_cards_are_marked(void* start,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3322 void* last) {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3323 return containing_card_is_marked(start) &&
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3324 containing_card_is_marked(last);
342 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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3327 #ifndef PRODUCT
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3328 // for debugging purposes
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3329 void ConcurrentMark::print_finger() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3330 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	3331 _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	3332 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	3333 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	3334 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3335 gclog_or_tty->print_cr("");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3336 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3337 #endif
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3338
3771 842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3339 void CMTask::scan_object(oop obj) {
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3340 assert(_nextMarkBitMap->isMarked((HeapWord*) obj), "invariant");
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3341
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3342 if (_cm->verbose_high()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3343 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	3344 _worker_id, (void*) obj);
3771 842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3345 }
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3346
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3347 size_t obj_size = obj->size();
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3348 _words_scanned += obj_size;
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3349
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3350 obj->oop_iterate(_cm_oop_closure);
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3351 statsOnly( ++_objs_scanned );
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3352 check_limits();
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3353 }
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3354
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3355 // Closure for iteration over bitmaps
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3356 class CMBitMapClosure : public BitMapClosure {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3357 private:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3358 // the bitmap that is being iterated over
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3359 CMBitMap* _nextMarkBitMap;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3360 ConcurrentMark* _cm;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3361 CMTask* _task;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3362
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3363 public:
5988 2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	3364 CMBitMapClosure(CMTask task, ConcurrentMark cm, CMBitMap* nextMarkBitMap) :
2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	3365 _task(task), _cm(cm), _nextMarkBitMap(nextMarkBitMap) { }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3366
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3367 bool do_bit(size_t offset) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3368 HeapWord* addr = _nextMarkBitMap->offsetToHeapWord(offset);
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3369 assert(_nextMarkBitMap->isMarked(addr), "invariant");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3370 assert( addr < _cm->finger(), "invariant");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3371
5988 2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	3372 statsOnly( _task->increase_objs_found_on_bitmap() );
2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	3373 assert(addr >= _task->finger(), "invariant");
2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	3374
2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	3375 // We move that task's local finger along.
2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	3376 _task->move_finger_to(addr);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3377
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3378 _task->scan_object(oop(addr));
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3379 // we only partially drain the local queue and global stack
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3380 _task->drain_local_queue(true);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3381 _task->drain_global_stack(true);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3382
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3383 // 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	3384 // the iteration
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3385 return !_task->has_aborted();
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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3389 // Closure for iterating over objects, currently only used for
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3390 // processing SATB buffers.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3391 class CMObjectClosure : public ObjectClosure {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3392 private:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3393 CMTask* _task;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3394
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3395 public:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3396 void do_object(oop obj) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3397 _task->deal_with_reference(obj);
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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3400 CMObjectClosure(CMTask* task) : _task(task) { }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3401 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3402
3771 842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3403 G1CMOopClosure::G1CMOopClosure(G1CollectedHeap* g1h,
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3404 ConcurrentMark* cm,
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3405 CMTask* task)
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3406 : _g1h(g1h), _cm(cm), _task(task) {
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3407 assert(_ref_processor == NULL, "should be initialized to NULL");
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3408
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3409 if (G1UseConcMarkReferenceProcessing) {
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	3410 _ref_processor = g1h->ref_processor_cm();
3771 842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3411 assert(_ref_processor != NULL, "should not be NULL");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3412 }
3771 842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3413 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3414
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3415 void CMTask::setup_for_region(HeapRegion* hr) {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3416 // Separated the asserts so that we know which one fires.
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3417 assert(hr != NULL,
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3418 "claim_region() should have filtered out continues humongous regions");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3419 assert(!hr->continuesHumongous(),
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3420 "claim_region() should have filtered out continues humongous regions");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3421
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3422 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3423 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	3424 _worker_id, hr);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3425 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3426
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3427 _curr_region = hr;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3428 _finger = hr->bottom();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3429 update_region_limit();
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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3432 void CMTask::update_region_limit() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3433 HeapRegion* hr = _curr_region;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3434 HeapWord* bottom = hr->bottom();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3435 HeapWord* limit = hr->next_top_at_mark_start();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3436
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3437 if (limit == bottom) {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3438 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3439 gclog_or_tty->print_cr("[%u] found an empty region "
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3440 "["PTR_FORMAT", "PTR_FORMAT")",
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3441 _worker_id, bottom, limit);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3442 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3443 // The region was collected underneath our feet.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3444 // We set the finger to bottom to ensure that the bitmap
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3445 // iteration that will follow this will not do anything.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3446 // (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	3447 // 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	3448 _finger = bottom;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3449 } else if (limit >= _region_limit) {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3450 assert(limit >= _finger, "peace of mind");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3451 } else {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3452 assert(limit < _region_limit, "only way to get here");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3453 // This can happen under some pretty unusual circumstances. An
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3454 // evacuation pause empties the region underneath our feet (NTAMS
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3455 // at bottom). We then do some allocation in the region (NTAMS
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3456 // 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	3457 // alloc region (NTAMS will move to top() and the objects
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3458 // originally below it will be grayed). All objects now marked in
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3459 // the region are explicitly grayed, if below the global finger,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3460 // 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	3461 // set _finger to be limit to ensure that the bitmap iteration
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3462 // doesn't do anything.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3463 _finger = limit;
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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3466 _region_limit = limit;
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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3469 void CMTask::giveup_current_region() {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3470 assert(_curr_region != NULL, "invariant");
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3471 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3472 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	3473 _worker_id, _curr_region);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3474 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3475 clear_region_fields();
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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3478 void CMTask::clear_region_fields() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3479 // Values for these three fields that indicate that we're not
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3480 // holding on to a region.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3481 _curr_region = NULL;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3482 _finger = NULL;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3483 _region_limit = NULL;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3484 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3485
3771 842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3486 void CMTask::set_cm_oop_closure(G1CMOopClosure* cm_oop_closure) {
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3487 if (cm_oop_closure == NULL) {
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3488 assert(_cm_oop_closure != NULL, "invariant");
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3489 } else {
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3490 assert(_cm_oop_closure == NULL, "invariant");
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3491 }
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3492 _cm_oop_closure = cm_oop_closure;
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3493 }
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3494
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3495 void CMTask::reset(CMBitMap* nextMarkBitMap) {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3496 guarantee(nextMarkBitMap != NULL, "invariant");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3497
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3498 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3499 gclog_or_tty->print_cr("[%u] resetting", _worker_id);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3500 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3501
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3502 _nextMarkBitMap = nextMarkBitMap;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3503 clear_region_fields();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3504
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3505 _calls = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3506 _elapsed_time_ms = 0.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3507 _termination_time_ms = 0.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3508 _termination_start_time_ms = 0.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3509
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3510 #if _MARKING_STATS_
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3511 _local_pushes = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3512 _local_pops = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3513 _local_max_size = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3514 _objs_scanned = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3515 _global_pushes = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3516 _global_pops = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3517 _global_max_size = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3518 _global_transfers_to = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3519 _global_transfers_from = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3520 _regions_claimed = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3521 _objs_found_on_bitmap = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3522 _satb_buffers_processed = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3523 _steal_attempts = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3524 _steals = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3525 _aborted = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3526 _aborted_overflow = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3527 _aborted_cm_aborted = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3528 _aborted_yield = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3529 _aborted_timed_out = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3530 _aborted_satb = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3531 _aborted_termination = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3532 #endif // _MARKING_STATS_
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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3535 bool CMTask::should_exit_termination() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3536 regular_clock_call();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3537 // 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	3538 // 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	3539 // 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	3540 return !_cm->mark_stack_empty() \|\| has_aborted();
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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3543 void CMTask::reached_limit() {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3544 assert(_words_scanned >= _words_scanned_limit \|\|
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3545 _refs_reached >= _refs_reached_limit ,
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3546 "shouldn't have been called otherwise");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3547 regular_clock_call();
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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3550 void CMTask::regular_clock_call() {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3551 if (has_aborted()) return;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3552
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3553 // First, we need to recalculate the words scanned and refs reached
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3554 // limits for the next clock call.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3555 recalculate_limits();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3556
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3557 // During the regular clock call we do the following
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3558
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3559 // (1) If an overflow has been flagged, then we abort.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3560 if (_cm->has_overflown()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3561 set_has_aborted();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3562 return;
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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3565 // 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	3566 // to check anything else. The other steps are only needed during
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3567 // the concurrent marking phase.
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3568 if (!concurrent()) return;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3569
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3570 // (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	3571 if (_cm->has_aborted()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3572 set_has_aborted();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3573 statsOnly( ++_aborted_cm_aborted );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3574 return;
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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3577 double curr_time_ms = os::elapsedVTime() * 1000.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3578
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3579 // (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	3580 #if _MARKING_STATS_
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3581 if (_words_scanned >= _words_scanned_limit) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3582 ++_clock_due_to_scanning;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3583 }
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3584 if (_refs_reached >= _refs_reached_limit) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3585 ++_clock_due_to_marking;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3586 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3587
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3588 double last_interval_ms = curr_time_ms - _interval_start_time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3589 _interval_start_time_ms = curr_time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3590 _all_clock_intervals_ms.add(last_interval_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3591
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3592 if (_cm->verbose_medium()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3593 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	3594 "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	3595 _worker_id, last_interval_ms,
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3596 _words_scanned,
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3597 (_words_scanned >= _words_scanned_limit) ? " (*)" : "",
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3598 _refs_reached,
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3599 (_refs_reached >= _refs_reached_limit) ? " (*)" : "");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3600 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3601 #endif // _MARKING_STATS_
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3602
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3603 // (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	3604 if (_cm->should_yield()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3605 // 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	3606 // responsible for yielding.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3607 set_has_aborted();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3608 statsOnly( ++_aborted_yield );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3609 return;
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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3612 // (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	3613 // then we abort.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3614 double elapsed_time_ms = curr_time_ms - _start_time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3615 if (elapsed_time_ms > _time_target_ms) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3616 set_has_aborted();
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	3617 _has_timed_out = true;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3618 statsOnly( ++_aborted_timed_out );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3619 return;
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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3622 // (6) Finally, we check whether there are enough completed STAB
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3623 // buffers available for processing. If there are, we abort.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3624 SATBMarkQueueSet& satb_mq_set = JavaThread::satb_mark_queue_set();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3625 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	3626 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3627 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	3628 _worker_id);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3629 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3630 // 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	3631 // the marking task to do so
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3632 set_has_aborted();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3633 statsOnly( ++_aborted_satb );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3634 return;
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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3638 void CMTask::recalculate_limits() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3639 _real_words_scanned_limit = _words_scanned + words_scanned_period;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3640 _words_scanned_limit = _real_words_scanned_limit;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3641
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3642 _real_refs_reached_limit = _refs_reached + refs_reached_period;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3643 _refs_reached_limit = _real_refs_reached_limit;
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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3646 void CMTask::decrease_limits() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3647 // 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	3648 // 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	3649 // 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	3650 // scanning limit so that the clock is called earlier.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3651
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3652 if (_cm->verbose_medium()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3653 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	3654 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3655
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3656 _words_scanned_limit = _real_words_scanned_limit -
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3657 3 * words_scanned_period / 4;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3658 _refs_reached_limit = _real_refs_reached_limit -
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3659 3 * refs_reached_period / 4;
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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3662 void CMTask::move_entries_to_global_stack() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3663 // 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	3664 // from the local queue
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3665 oop buffer[global_stack_transfer_size];
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3666
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3667 int n = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3668 oop obj;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3669 while (n < global_stack_transfer_size && _task_queue->pop_local(obj)) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3670 buffer[n] = obj;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3671 ++n;
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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3674 if (n > 0) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3675 // we popped at least one entry from the local queue
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3676
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3677 statsOnly( ++_global_transfers_to; _local_pops += n );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3678
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3679 if (!_cm->mark_stack_push(buffer, n)) {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3680 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3681 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	3682 _worker_id);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3683 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3684 set_has_aborted();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3685 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3686 // the transfer was successful
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3687
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3688 if (_cm->verbose_medium()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3689 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	3690 _worker_id, n);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3691 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3692 statsOnly( int tmp_size = _cm->mark_stack_size();
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3693 if (tmp_size > _global_max_size) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3694 _global_max_size = tmp_size;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3695 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3696 _global_pushes += n );
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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3700 // this operation was quite expensive, so decrease the limits
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3701 decrease_limits();
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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3704 void CMTask::get_entries_from_global_stack() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3705 // 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	3706 // from the global stack.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3707 oop buffer[global_stack_transfer_size];
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3708 int n;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3709 _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	3710 assert(n <= global_stack_transfer_size,
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3711 "we should not pop more than the given limit");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3712 if (n > 0) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3713 // yes, we did actually pop at least one entry
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3714
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3715 statsOnly( ++_global_transfers_from; _global_pops += n );
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3716 if (_cm->verbose_medium()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3717 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	3718 _worker_id, n);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3719 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3720 for (int i = 0; i < n; ++i) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3721 bool success = _task_queue->push(buffer[i]);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3722 // 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	3723 // 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	3724 assert(success, "invariant");
342 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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3727 statsOnly( int tmp_size = _task_queue->size();
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3728 if (tmp_size > _local_max_size) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3729 _local_max_size = tmp_size;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3730 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3731 _local_pushes += n );
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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3734 // this operation was quite expensive, so decrease the limits
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3735 decrease_limits();
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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3738 void CMTask::drain_local_queue(bool partially) {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3739 if (has_aborted()) return;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3740
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3741 // 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	3742 // 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	3743 // of things to do) or totally (at the very end).
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3744 size_t target_size;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3745 if (partially) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3746 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	3747 } else {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3748 target_size = 0;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3749 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3750
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3751 if (_task_queue->size() > target_size) {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3752 if (_cm->verbose_high()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3753 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	3754 _worker_id, target_size);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3755 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3756
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3757 oop obj;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3758 bool ret = _task_queue->pop_local(obj);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3759 while (ret) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3760 statsOnly( ++_local_pops );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3761
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3762 if (_cm->verbose_high()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3763 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	3764 (void*) obj);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3765 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3766
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3767 assert(_g1h->is_in_g1_reserved((HeapWord*) obj), "invariant" );
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2177 diff changeset	3768 assert(!_g1h->is_on_master_free_list(
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	3769 _g1h->heap_region_containing((HeapWord*) obj)), "invariant");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3770
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3771 scan_object(obj);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3772
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3773 if (_task_queue->size() <= target_size \|\| has_aborted()) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3774 ret = false;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3775 } else {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3776 ret = _task_queue->pop_local(obj);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3777 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3778 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3779
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3780 if (_cm->verbose_high()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3781 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	3782 _worker_id, _task_queue->size());
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3783 }
342 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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3787 void CMTask::drain_global_stack(bool partially) {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3788 if (has_aborted()) return;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3789
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3790 // 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	3791 // drain the global stack.
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3792 assert(partially \|\| _task_queue->size() == 0, "invariant");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3793
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3794 // 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	3795 // 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	3796 // 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	3797 // because we move entries from the global stack in chunks or
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3798 // 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	3799 // drop below the target. But, this is not a problem.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3800 size_t target_size;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3801 if (partially) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3802 target_size = _cm->partial_mark_stack_size_target();
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3803 } else {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3804 target_size = 0;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3805 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3806
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3807 if (_cm->mark_stack_size() > target_size) {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3808 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3809 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	3810 _worker_id, target_size);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3811 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3812
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3813 while (!has_aborted() && _cm->mark_stack_size() > target_size) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3814 get_entries_from_global_stack();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3815 drain_local_queue(partially);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3816 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3817
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3818 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3819 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	3820 _worker_id, _cm->mark_stack_size());
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3821 }
342 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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3825 // 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	3826 // 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	3827 // replicated. We should really get rid of the single-threaded version
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3828 // of the code to simplify things.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3829 void CMTask::drain_satb_buffers() {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3830 if (has_aborted()) return;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3831
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3832 // 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	3833 // 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	3834 // notices that SATB buffers are available for draining. It'd be
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3835 // very counter productive if it did that. :-)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3836 _draining_satb_buffers = true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3837
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3838 CMObjectClosure oc(this);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3839 SATBMarkQueueSet& satb_mq_set = JavaThread::satb_mark_queue_set();
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3840 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	3841 satb_mq_set.set_par_closure(_worker_id, &oc);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3842 } else {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3843 satb_mq_set.set_closure(&oc);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3844 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3845
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3846 // This keeps claiming and applying the closure to completed buffers
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3847 // 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	3848 if (G1CollectedHeap::use_parallel_gc_threads()) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3849 while (!has_aborted() &&
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3850 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	3851 if (_cm->verbose_medium()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3852 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	3853 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3854 statsOnly( ++_satb_buffers_processed );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3855 regular_clock_call();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3856 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3857 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3858 while (!has_aborted() &&
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3859 satb_mq_set.apply_closure_to_completed_buffer()) {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3860 if (_cm->verbose_medium()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3861 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	3862 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3863 statsOnly( ++_satb_buffers_processed );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3864 regular_clock_call();
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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3868 if (!concurrent() && !has_aborted()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3869 // We should only do this during remark.
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3870 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	3871 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	3872 } else {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3873 satb_mq_set.iterate_closure_all_threads();
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3874 }
342 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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3877 _draining_satb_buffers = false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3878
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3879 assert(has_aborted() \|\|
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3880 concurrent() \|\|
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3881 satb_mq_set.completed_buffers_num() == 0, "invariant");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3882
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3883 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	3884 satb_mq_set.set_par_closure(_worker_id, NULL);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3885 } else {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3886 satb_mq_set.set_closure(NULL);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3887 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3888
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3889 // again, this was a potentially expensive operation, decrease the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3890 // limits to get the regular clock call early
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3891 decrease_limits();
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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3894 void CMTask::print_stats() {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3895 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	3896 _worker_id, _calls);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3897 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	3898 _elapsed_time_ms, _termination_time_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3899 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	3900 _step_times_ms.num(), _step_times_ms.avg(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3901 _step_times_ms.sd());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3902 gclog_or_tty->print_cr(" max = %1.2lfms, total = %1.2lfms",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3903 _step_times_ms.maximum(), _step_times_ms.sum());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3904
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3905 #if _MARKING_STATS_
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3906 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	3907 _all_clock_intervals_ms.num(), _all_clock_intervals_ms.avg(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3908 _all_clock_intervals_ms.sd());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3909 gclog_or_tty->print_cr(" max = %1.2lfms, total = %1.2lfms",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3910 _all_clock_intervals_ms.maximum(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3911 _all_clock_intervals_ms.sum());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3912 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	3913 _clock_due_to_scanning, _clock_due_to_marking);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3914 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	3915 _objs_scanned, _objs_found_on_bitmap);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3916 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	3917 _local_pushes, _local_pops, _local_max_size);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3918 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	3919 _global_pushes, _global_pops, _global_max_size);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3920 gclog_or_tty->print_cr(" transfers to = %d, transfers from = %d",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3921 _global_transfers_to,_global_transfers_from);
5988 2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	3922 gclog_or_tty->print_cr(" Regions: claimed = %d", _regions_claimed);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3923 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	3924 gclog_or_tty->print_cr(" Steals: attempts = %d, successes = %d",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3925 _steal_attempts, _steals);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3926 gclog_or_tty->print_cr(" Aborted: %d, due to", _aborted);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3927 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	3928 _aborted_overflow, _aborted_cm_aborted, _aborted_yield);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3929 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	3930 _aborted_timed_out, _aborted_satb, _aborted_termination);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3931 #endif // _MARKING_STATS_
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 /*****************************************************************************
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3935
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	3936 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	3937 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	3938 with other invocations of do_marking_step() on different tasks
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3939 (but only one per task, obviously) and concurrently with the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3940 mutator threads, or during remark, hence it eliminates the need
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3941 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	3942 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	3943 phase. Interestingly, tasks are also claimable during evacuation
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3944 pauses too, since do_marking_step() ensures that it aborts before
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3945 it needs to yield.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3946
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	3947 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	3948 following:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3949
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3950 (1) Marking Bitmap. If there are gray objects that appear only
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3951 on the bitmap (this happens either when dealing with an overflow
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3952 or when the initial marking phase has simply marked the roots
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3953 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	3954 regions whose bitmap they then scan to find gray objects. A
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3955 global finger indicates where the end of the last claimed region
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3956 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	3957 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	3958 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	3959 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	3960 pushed on a stack).
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3961
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3962 (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	3963 reasonably efficiently by the task. Other tasks can steal from
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3964 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	3965 task attempts to keep its local queue short but not totally
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3966 empty, so that entries are available for stealing by other
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3967 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	3968 drain its local queue.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3969
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3970 (3) Global Mark Stack. This handles local queue overflow. During
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3971 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	3972 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	3973 interaction with it which might cause contention. If it
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3974 overflows, then the marking phase should restart and iterate
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3975 over the bitmap to identify gray objects. Throughout the marking
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3976 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	3977 length but not totally empty, so that entries are available for
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3978 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	3979 will totally drain the global mark stack.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3980
5988 2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	3981 (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	3982 made available. Buffers are regularly removed from this queue
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3983 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	3984 long. During remark, all completed buffers are processed, as
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3985 well as the filled in parts of any uncompleted buffers.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3986
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3987 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	3988 has been reached. There are a few other cases when the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3989 do_marking_step() method also aborts:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3990
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3991 (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	3992
5988 2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	3993 (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	3994 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	3995 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	3996 (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	3997 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	3998 immediately restart.
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3999
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4000 (3) When enough completed SATB buffers are available. The
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4001 do_marking_step() method only tries to drain SATB buffers right
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4002 at the beginning. So, if enough buffers are available, the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4003 marking step aborts and the SATB buffers are processed at
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4004 the beginning of the next invocation.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4005
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4006 (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	4007 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	4008 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	4009 happens then objects will be compacted underneath our feet, the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4010 heap might shrink, etc. We save checking for this by just
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4011 aborting and doing the yield right at the end.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4012
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4013 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	4014 be called in a loop (or, otherwise, regularly) until it completes.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4015
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4016 If a marking step completes without its has_aborted() flag being
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4017 true, it means it has completed the current marking phase (and
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4018 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	4019
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4020 A method called regular_clock_call() is invoked "regularly" (in
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4021 sub ms intervals) throughout marking. It is this clock method that
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4022 checks all the abort conditions which were mentioned above and
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4023 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	4024 trigger this clock method: when the number of object words the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4025 marking phase has scanned or the number of references the marking
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4026 phase has visited reach a given limit. Additional invocations to
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4027 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	4028 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	4029 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	4030 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	4031 too and not constantly check them throughout the code.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4032
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4033 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	4034 termination protocol.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4035
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4036 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	4037 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	4038 skip any synchronization in the termination and overflow code.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4039 Examples include the serial remark code and the serial reference
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4040 processing closures.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4041
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4042 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	4043 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	4044 Examples include the concurrent marking code (CMMarkingTask),
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4045 the MT remark code, and the MT reference processing closures.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4046
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4047 *****************************************************************************/
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4048
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	4049 void CMTask::do_marking_step(double time_target_ms,
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4050 bool do_termination,
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4051 bool is_serial) {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4052 assert(time_target_ms >= 1.0, "minimum granularity is 1ms");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4053 assert(concurrent() == _cm->concurrent(), "they should be the same");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4054
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4055 G1CollectorPolicy* g1_policy = _g1h->g1_policy();
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4056 assert(_task_queues != NULL, "invariant");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4057 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	4058 assert(_task_queues->queue(_worker_id) == _task_queue, "invariant");
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4059
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4060 assert(!_claimed,
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4061 "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	4062
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4063 // 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	4064 // 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	4065 // 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	4066 // catch most problems.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4067 _claimed = true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4068
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4069 _start_time_ms = os::elapsedVTime() * 1000.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4070 statsOnly( _interval_start_time_ms = _start_time_ms );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4071
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4072 // 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	4073 // 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	4074 // enable stealing when the termination protocol is enabled
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4075 // and do_marking_step() is not being called serially.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4076 bool do_stealing = do_termination && !is_serial;
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4077
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4078 double diff_prediction_ms =
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4079 g1_policy->get_new_prediction(&_marking_step_diffs_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4080 _time_target_ms = time_target_ms - diff_prediction_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4081
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4082 // 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	4083 // call the regular clock method
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4084 _words_scanned = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4085 _refs_reached = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4086 recalculate_limits();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4087
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4088 // clear all flags
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4089 clear_has_aborted();
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	4090 _has_timed_out = false;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4091 _draining_satb_buffers = false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4092
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4093 ++_calls;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4094
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4095 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4096 gclog_or_tty->print_cr("[%u] >>>>>>>>>> START, call = %d, "
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4097 "target = %1.2lfms >>>>>>>>>>",
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4098 _worker_id, _calls, _time_target_ms);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4099 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4100
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4101 // 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	4102 // 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	4103 // statically.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4104 CMBitMapClosure bitmap_closure(this, _cm, _nextMarkBitMap);
3771 842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	4105 G1CMOopClosure cm_oop_closure(_g1h, _cm, this);
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	4106 set_cm_oop_closure(&cm_oop_closure);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4107
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4108 if (_cm->has_overflown()) {
5988 2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	4109 // 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	4110 // 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	4111 // 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	4112 // right at the end of this task.
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4113 set_has_aborted();
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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4116 // First drain any available SATB buffers. After this, we will not
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4117 // look at SATB buffers before the next invocation of this method.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4118 // If enough completed SATB buffers are queued up, the regular clock
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4119 // will abort this task so that it restarts.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4120 drain_satb_buffers();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4121 // ...then partially drain the local queue and the global stack
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4122 drain_local_queue(true);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4123 drain_global_stack(true);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4124
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4125 do {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4126 if (!has_aborted() && _curr_region != NULL) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4127 // 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	4128 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	4129 "should not be NULL either");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4130
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4131 // We might have restarted this task after an evacuation pause
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4132 // which might have evacuated the region we're holding on to
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4133 // 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	4134 // 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	4135 // contains garbage (update_region_limit() will also move
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4136 // _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	4137 update_region_limit();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4138 // 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	4139 // as we might be restarting this task after aborting half-way
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4140 // through scanning this region. In this case, _finger points to
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4141 // 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	4142 // fresh region, _finger points to start().
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4143 MemRegion mr = MemRegion(_finger, _region_limit);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4144
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4145 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4146 gclog_or_tty->print_cr("[%u] we're scanning part "
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4147 "["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	4148 "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	4149 _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	4150 HR_FORMAT_PARAMS(_curr_region));
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4151 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4152
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	4153 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	4154 "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	4155
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 // 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	4157 // 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	4158 // 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	4159 // 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	4160 // 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	4161 // 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	4162 // that is left.
8034 bce1ac447f6b 7052429: G1: Avoid unnecessary scanning of humongous regions during concurrent marking johnc parents: 8014 diff changeset	4163 // 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	4164 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	4165 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	4166 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	4167 } 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	4168 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	4169 // 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	4170 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	4171 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	4172 }
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 // 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	4174 // 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	4175 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	4176 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	4177 } else if (_nextMarkBitMap->iterate(&bitmap_closure, mr)) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4178 giveup_current_region();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4179 regular_clock_call();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4180 } else {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4181 assert(has_aborted(), "currently the only way to do so");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4182 // The only way to abort the bitmap iteration is to return
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4183 // false from the do_bit() method. However, inside the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4184 // do_bit() method we move the _finger to point to the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4185 // object currently being looked at. So, if we bail out, we
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4186 // have definitely set _finger to something non-null.
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4187 assert(_finger != NULL, "invariant");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4188
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4189 // Region iteration was actually aborted. So now _finger
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4190 // 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	4191 // leave it there, when we restart this task, we will rescan
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4192 // 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	4193 // enough to point to the next possible object header (the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4194 // 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	4195 // granularity).
1314 3f0549ed0c98 6921710: G1: assert(new_finger >= _finger && new_finger < _region_limit,"invariant") apetrusenko parents: 1284 diff changeset	4196 assert(_finger < _region_limit, "invariant");
8733 9def4075da6d 8008079: G1: Add nextObject routine to CMBitMapRO and replace nextWord tamao parents: 8039 diff changeset	4197 HeapWord* new_finger = _nextMarkBitMap->nextObject(_finger);
1314 3f0549ed0c98 6921710: G1: assert(new_finger >= _finger && new_finger < _region_limit,"invariant") apetrusenko parents: 1284 diff changeset	4198 // 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	4199 if (new_finger >= _region_limit) {
5988 2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	4200 giveup_current_region();
1314 3f0549ed0c98 6921710: G1: assert(new_finger >= _finger && new_finger < _region_limit,"invariant") apetrusenko parents: 1284 diff changeset	4201 } else {
5988 2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	4202 move_finger_to(new_finger);
1314 3f0549ed0c98 6921710: G1: assert(new_finger >= _finger && new_finger < _region_limit,"invariant") apetrusenko parents: 1284 diff changeset	4203 }
342 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 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4206 // At this point we have either completed iterating over the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4207 // region we were holding on to, or we have aborted.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4208
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4209 // We then partially drain the local queue and the global stack.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4210 // (Do we really need this?)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4211 drain_local_queue(true);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4212 drain_global_stack(true);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4213
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4214 // 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	4215 // return NULL with potentially more regions available for
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4216 // 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	4217 // whether we're done or not.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4218 while (!has_aborted() && _curr_region == NULL && !_cm->out_of_regions()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4219 // 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	4220 // given up on the previous one.
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4221 // Separated the asserts so that we know which one fires.
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4222 assert(_curr_region == NULL, "invariant");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4223 assert(_finger == NULL, "invariant");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4224 assert(_region_limit == NULL, "invariant");
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4225 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4226 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	4227 }
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4228 HeapRegion* claimed_region = _cm->claim_region(_worker_id);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4229 if (claimed_region != NULL) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4230 // Yes, we managed to claim one
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4231 statsOnly( ++_regions_claimed );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4232
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4233 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4234 gclog_or_tty->print_cr("[%u] we successfully claimed "
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4235 "region "PTR_FORMAT,
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4236 _worker_id, claimed_region);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4237 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4238
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4239 setup_for_region(claimed_region);
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4240 assert(_curr_region == claimed_region, "invariant");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4241 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4242 // 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	4243 // 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	4244 // 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	4245 // method once round the loop to make sure it's called
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4246 // frequently enough.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4247 regular_clock_call();
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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4250 if (!has_aborted() && _curr_region == NULL) {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4251 assert(_cm->out_of_regions(),
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4252 "at this point we should be out of regions");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4253 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4254 } while ( _curr_region != NULL && !has_aborted());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4255
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4256 if (!has_aborted()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4257 // 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	4258 // tasks might be pushing objects to it concurrently.
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4259 assert(_cm->out_of_regions(),
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4260 "at this point we should be out of regions");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4261
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4262 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4263 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	4264 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4265
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4266 // Try to reduce the number of available SATB buffers so that
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4267 // remark has less work to do.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4268 drain_satb_buffers();
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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4271 // 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	4272 // local queue and global stack.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4273 drain_local_queue(false);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4274 drain_global_stack(false);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4275
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4276 // Attempt at work stealing from other task's queues.
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	4277 if (do_stealing && !has_aborted()) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4278 // 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	4279 // we could. Let's try to do some stealing...
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4280
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4281 // 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	4282 // tasks might be pushing objects to it concurrently.
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4283 assert(_cm->out_of_regions() && _task_queue->size() == 0,
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4284 "only way to reach here");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4285
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4286 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4287 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	4288 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4289
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4290 while (!has_aborted()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4291 oop obj;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4292 statsOnly( ++_steal_attempts );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4293
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4294 if (_cm->try_stealing(_worker_id, &_hash_seed, obj)) {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4295 if (_cm->verbose_medium()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4296 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	4297 _worker_id, (void*) obj);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4298 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4299
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4300 statsOnly( ++_steals );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4301
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4302 assert(_nextMarkBitMap->isMarked((HeapWord*) obj),
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4303 "any stolen object should be marked");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4304 scan_object(obj);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4305
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4306 // 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	4307 // local queue and global stack.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4308 drain_local_queue(false);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4309 drain_global_stack(false);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4310 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4311 break;
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 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4315
3316 cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	4316 // 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	4317 // 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	4318 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	4319 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	4320 _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	4321 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	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 }
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	4324
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4325 // 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	4326 // termination protocol.
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	4327 if (do_termination && !has_aborted()) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4328 // 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	4329 // tasks might be concurrently pushing objects on it.
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4330 // Separated the asserts so that we know which one fires.
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4331 assert(_cm->out_of_regions(), "only way to reach here");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4332 assert(_task_queue->size() == 0, "only way to reach here");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4333
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4334 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4335 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	4336 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4337
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4338 _termination_start_time_ms = os::elapsedVTime() * 1000.0;
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4339
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4340 // The CMTask class also extends the TerminatorTerminator class,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4341 // hence its should_exit_termination() method will also decide
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4342 // whether to exit the termination protocol or not.
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4343 bool finished = (is_serial \|\|
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4344 _cm->terminator()->offer_termination(this));
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4345 double termination_end_time_ms = os::elapsedVTime() * 1000.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4346 _termination_time_ms +=
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4347 termination_end_time_ms - _termination_start_time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4348
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4349 if (finished) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4350 // We're all done.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4351
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4352 if (_worker_id == 0) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4353 // let's allow task 0 to do this
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4354 if (concurrent()) {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4355 assert(_cm->concurrent_marking_in_progress(), "invariant");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4356 // we need to set this to false before the next
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4357 // safepoint. This way we ensure that the marking phase
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4358 // doesn't observe any more heap expansions.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4359 _cm->clear_concurrent_marking_in_progress();
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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4363 // 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	4364 // all other tasks have finished. We separated the guarantees so
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4365 // 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	4366 // which one.
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4367 guarantee(_cm->out_of_regions(), "only way to reach here");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4368 guarantee(_cm->mark_stack_empty(), "only way to reach here");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4369 guarantee(_task_queue->size() == 0, "only way to reach here");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4370 guarantee(!_cm->has_overflown(), "only way to reach here");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4371 guarantee(!_cm->mark_stack_overflow(), "only way to reach here");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4372
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4373 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4374 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	4375 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4376 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4377 // 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	4378 // 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	4379
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4380 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4381 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	4382 _worker_id);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4383 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4384
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4385 set_has_aborted();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4386 statsOnly( ++_aborted_termination );
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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4390 // 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	4391 // closure which was statically allocated in this frame doesn't
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4392 // escape it by accident.
3771 842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	4393 set_cm_oop_closure(NULL);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4394 double end_time_ms = os::elapsedVTime() * 1000.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4395 double elapsed_time_ms = end_time_ms - _start_time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4396 // Update the step history.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4397 _step_times_ms.add(elapsed_time_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4398
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4399 if (has_aborted()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4400 // The task was aborted for some reason.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4401
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4402 statsOnly( ++_aborted );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4403
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	4404 if (_has_timed_out) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4405 double diff_ms = elapsed_time_ms - _time_target_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4406 // Keep statistics of how well we did with respect to hitting
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4407 // 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	4408 // other reasons, then the results might get skewed).
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4409 _marking_step_diffs_ms.add(diff_ms);
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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4412 if (_cm->has_overflown()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4413 // This is the interesting one. We aborted because a global
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4414 // overflow was raised. This means we have to restart the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4415 // marking phase and start iterating over regions. However, in
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4416 // 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	4417 // 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	4418 // will achieve this with the use of two barrier sync points.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4419
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4420 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4421 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	4422 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4423
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4424 if (!is_serial) {
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4425 // 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	4426 // from a parallel context
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4427 _cm->enter_first_sync_barrier(_worker_id);
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4428
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4429 // 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	4430 // stopped doing marking work. So, it's now safe to
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4431 // 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	4432 // task 0 will clear the global data structures.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4433 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4434
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4435 statsOnly( ++_aborted_overflow );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4436
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4437 // We clear the local state of this task...
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4438 clear_region_fields();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4439
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4440 if (!is_serial) {
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4441 // ...and enter the second barrier.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4442 _cm->enter_second_sync_barrier(_worker_id);
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4443 }
8788 e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	4444 // 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	4445 // marking, everything has been re-initialized and we're
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4446 // ready to restart.
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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4449 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4450 gclog_or_tty->print_cr("[%u] <<<<<<<<<< ABORTING, target = %1.2lfms, "
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4451 "elapsed = %1.2lfms <<<<<<<<<<",
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4452 _worker_id, _time_target_ms, elapsed_time_ms);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4453 if (_cm->has_aborted()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4454 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	4455 _worker_id);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4456 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4457 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4458 } else {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4459 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4460 gclog_or_tty->print_cr("[%u] <<<<<<<<<< FINISHED, target = %1.2lfms, "
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4461 "elapsed = %1.2lfms <<<<<<<<<<",
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4462 _worker_id, _time_target_ms, elapsed_time_ms);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4463 }
342 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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4466 _claimed = false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4467 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4468
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4469 CMTask::CMTask(uint worker_id,
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4470 ConcurrentMark* cm,
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	4471 size_t* marked_bytes,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	4472 BitMap* card_bm,
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4473 CMTaskQueue* task_queue,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4474 CMTaskQueueSet* task_queues)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4475 : _g1h(G1CollectedHeap::heap()),
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4476 _worker_id(worker_id), _cm(cm),
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4477 _claimed(false),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4478 _nextMarkBitMap(NULL), _hash_seed(17),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4479 _task_queue(task_queue),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4480 _task_queues(task_queues),
3771 842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	4481 _cm_oop_closure(NULL),
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	4482 _marked_bytes_array(marked_bytes),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	4483 _card_bm(card_bm) {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4484 guarantee(task_queue != NULL, "invariant");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4485 guarantee(task_queues != NULL, "invariant");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4486
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4487 statsOnly( _clock_due_to_scanning = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4488 _clock_due_to_marking = 0 );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4489
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4490 _marking_step_diffs_ms.add(0.5);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4491 }
2435 371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4492
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4493 // 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	4494 // 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	4495 // 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	4496 // 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	4497 // 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	4498 // 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	4499
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4500 // 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	4501 // 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	4502 #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	4503
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4504 #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	4505 #ifdef _LP64
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4506 #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	4507 #else // _LP64
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4508 #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	4509 #endif // _LP64
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4510
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4511 // 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	4512 #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	4513 #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	4514 #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	4515 #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	4516 #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	4517 #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	4518
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4519 // 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	4520 #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	4521 #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	4522 #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	4523 #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	4524
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4525 G1PrintRegionLivenessInfoClosure::
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4526 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	4527 : _out(out),
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4528 _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	4529 _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	4530 _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	4531 _hum_prev_live_bytes(0), _hum_next_live_bytes(0),
12080 5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4532 _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	4533 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	4534 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	4535 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	4536 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	4537
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4538 // 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	4539 _out->cr();
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" 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	4541 _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	4542 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	4543 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	4544 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	4545 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	4546 g1_reserved.start(), g1_reserved.end(),
3986 65a8ff39a6da 7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t johnc parents: 3979 diff changeset	4547 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	4548 _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	4549 _out->print_cr(G1PPRL_LINE_PREFIX
10290 05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4550 G1PPRL_TYPE_H_FORMAT
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4551 G1PPRL_ADDR_BASE_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_BYTE_H_FORMAT
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4555 G1PPRL_DOUBLE_H_FORMAT
12080 5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4556 G1PPRL_BYTE_H_FORMAT
10290 05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4557 G1PPRL_BYTE_H_FORMAT,
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4558 "type", "address-range",
12080 5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4559 "used", "prev-live", "next-live", "gc-eff",
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4560 "remset", "code-roots");
3977 5cc33133bc6d 7092245: G1: Wrong format specifier in G1PrintRegionLivenessInfo header output johnc parents: 3975 diff changeset	4561 _out->print_cr(G1PPRL_LINE_PREFIX
10290 05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4562 G1PPRL_TYPE_H_FORMAT
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4563 G1PPRL_ADDR_BASE_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_BYTE_H_FORMAT
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4567 G1PPRL_DOUBLE_H_FORMAT
12080 5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4568 G1PPRL_BYTE_H_FORMAT
10290 05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4569 G1PPRL_BYTE_H_FORMAT,
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4570 "", "",
12080 5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4571 "(bytes)", "(bytes)", "(bytes)", "(bytes/ms)",
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4572 "(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	4573 }
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4574
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4575 // 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	4576 // 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	4577 // 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	4578 // 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	4579 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	4580 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	4581 // 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	4582 // 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	4583 if (*hum_bytes > 0) {
3986 65a8ff39a6da 7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t johnc parents: 3979 diff changeset	4584 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	4585 *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	4586 }
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4587 return bytes;
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
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4590 // 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	4591 // 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	4592 // 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	4593 // 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	4594 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	4595 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	4596 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	4597 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	4598 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	4599 *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	4600 *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	4601 *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	4602 *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	4603 }
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4604
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4605 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	4606 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	4607 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	4608 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	4609 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	4610 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	4611 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	4612 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	4613 double gc_eff = r->gc_efficiency();
10290 05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4614 size_t remset_bytes = r->rem_set()->mem_size();
12080 5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4615 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	4616
2435 371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4617 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	4618 type = "FREE";
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4619 } 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	4620 type = "SURV";
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4621 } 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	4622 type = "EDEN";
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4623 } 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	4624 type = "HUMS";
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4625
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4626 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	4627 _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	4628 "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	4629 // 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	4630 _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	4631 _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	4632 _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	4633 _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	4634 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	4635 &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	4636 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	4637 } 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	4638 type = "HUMC";
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4639 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	4640 &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	4641 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	4642 } else {
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4643 type = "OLD";
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
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4646 _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	4647 _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	4648 _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	4649 _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	4650 _total_remset_bytes += remset_bytes;
12080 5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4651 _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	4652
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4653 // 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	4654 _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	4655 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	4656 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	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
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4659 G1PPRL_BYTE_FORMAT
10290 05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4660 G1PPRL_DOUBLE_FORMAT
12080 5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4661 G1PPRL_BYTE_FORMAT
10290 05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4662 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	4663 type, bottom, end,
12080 5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4664 used_bytes, prev_live_bytes, next_live_bytes, gc_eff,
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4665 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	4666
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4667 return false;
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
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4670 G1PrintRegionLivenessInfoClosure::~G1PrintRegionLivenessInfoClosure() {
10290 05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4671 // 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	4672 _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	4673 // 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	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 _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	4676 " SUMMARY"
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_FORMAT("capacity")
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("used")
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4679 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	4680 G1PPRL_SUM_MB_PERC_FORMAT("next-live")
12080 5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4681 G1PPRL_SUM_MB_FORMAT("remset")
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4682 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	4683 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	4684 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	4685 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	4686 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	4687 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	4688 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	4689 perc(_total_next_live_bytes, _total_capacity_bytes),
12080 5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4690 bytes_to_mb(_total_remset_bytes),
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4691 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	4692 _out->cr();
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4693 }

Mercurial > hg > graal-compiler

annotate src/share/vm/gc_implementation/g1/concurrentMark.cpp @ 14304:a2866d45e99e