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

annotate src/share/vm/gc_implementation/g1/concurrentMark.cpp @ 12233:40136aa2cdb1

8010722: assert: failed: heap size is too big for compressed oops Summary: Use conservative assumptions of required alignment for the various garbage collector components into account when determining the maximum heap size that supports compressed oops. Using this conservative value avoids several circular dependencies in the calculation. Reviewed-by: stefank, dholmes

author	tschatzl
date	Wed, 11 Sep 2013 16:25:02 +0200
parents	ff218fdb30ba
children	190899198332

rev	line source
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1 /*
7450 d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	2 * Copyright (c) 2001, 2013, Oracle and/or its affiliates. All rights reserved.
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4 *
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	5 * This code is free software; you can redistribute it and/or modify it
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	6 * under the terms of the GNU General Public License version 2 only, as
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	7 * published by the Free Software Foundation.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	8 *
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	9 * This code is distributed in the hope that it will be useful, but WITHOUT
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	12 * version 2 for more details (a copy is included in the LICENSE file that
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	13 * accompanied this code).
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	14 *
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	15 * You should have received a copy of the GNU General Public License version
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	16 * 2 along with this work; if not, write to the Free Software Foundation,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	18 *
1552 c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 1547 diff changeset	19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 1547 diff changeset	20 * or visit www.oracle.com if you need additional information or have any
c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 1547 diff changeset	21 * questions.
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	22 *
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	23 */
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	24
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1885 diff changeset	25 #include "precompiled.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1885 diff changeset	26 #include "classfile/symbolTable.hpp"
3771 842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	27 #include "gc_implementation/g1/concurrentMark.inline.hpp"
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1885 diff changeset	28 #include "gc_implementation/g1/concurrentMarkThread.inline.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1885 diff changeset	29 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1885 diff changeset	30 #include "gc_implementation/g1/g1CollectorPolicy.hpp"
3914 20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3867 diff changeset	31 #include "gc_implementation/g1/g1ErgoVerbose.hpp"
6007 5c86f8211d1e 7160728: Introduce an extra logging level for G1 logging brutisso parents: 5988 diff changeset	32 #include "gc_implementation/g1/g1Log.hpp"
3771 842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	33 #include "gc_implementation/g1/g1OopClosures.inline.hpp"
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1885 diff changeset	34 #include "gc_implementation/g1/g1RemSet.hpp"
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	35 #include "gc_implementation/g1/heapRegion.inline.hpp"
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1885 diff changeset	36 #include "gc_implementation/g1/heapRegionRemSet.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1885 diff changeset	37 #include "gc_implementation/g1/heapRegionSeq.inline.hpp"
2125 7246a374a9f2 6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent kamg parents: 2037 diff changeset	38 #include "gc_implementation/shared/vmGCOperations.hpp"
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	39 #include "gc_implementation/shared/gcTimer.hpp"
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	40 #include "gc_implementation/shared/gcTrace.hpp"
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	41 #include "gc_implementation/shared/gcTraceTime.hpp"
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1885 diff changeset	42 #include "memory/genOopClosures.inline.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1885 diff changeset	43 #include "memory/referencePolicy.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1885 diff changeset	44 #include "memory/resourceArea.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1885 diff changeset	45 #include "oops/oop.inline.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1885 diff changeset	46 #include "runtime/handles.inline.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1885 diff changeset	47 #include "runtime/java.hpp"
6197 d2a62e0f25eb 6995781: Native Memory Tracking (Phase 1) zgu parents: 6027 diff changeset	48 #include "services/memTracker.hpp"
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	49
4828 851b58c26def 7130334: G1: Change comments and error messages that refer to CMS in g1/concurrentMark.cpp/hpp brutisso parents: 4827 diff changeset	50 // Concurrent marking bit map wrapper
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	51
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	52 CMBitMapRO::CMBitMapRO(int shifter) :
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	53 _bm(),
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	54 _shifter(shifter) {
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	55 _bmStartWord = 0;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	56 _bmWordSize = 0;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	57 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	58
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	59 HeapWord* CMBitMapRO::getNextMarkedWordAddress(HeapWord* addr,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	60 HeapWord* limit) const {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	61 // First we must round addr up to a possible object boundary.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	62 addr = (HeapWord*)align_size_up((intptr_t)addr,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	63 HeapWordSize << _shifter);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	64 size_t addrOffset = heapWordToOffset(addr);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	65 if (limit == NULL) {
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	66 limit = _bmStartWord + _bmWordSize;
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	67 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	68 size_t limitOffset = heapWordToOffset(limit);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	69 size_t nextOffset = _bm.get_next_one_offset(addrOffset, limitOffset);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	70 HeapWord* nextAddr = offsetToHeapWord(nextOffset);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	71 assert(nextAddr >= addr, "get_next_one postcondition");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	72 assert(nextAddr == limit \|\| isMarked(nextAddr),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	73 "get_next_one postcondition");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	74 return nextAddr;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	75 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	76
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	77 HeapWord* CMBitMapRO::getNextUnmarkedWordAddress(HeapWord* addr,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	78 HeapWord* limit) const {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	79 size_t addrOffset = heapWordToOffset(addr);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	80 if (limit == NULL) {
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	81 limit = _bmStartWord + _bmWordSize;
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	82 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	83 size_t limitOffset = heapWordToOffset(limit);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	84 size_t nextOffset = _bm.get_next_zero_offset(addrOffset, limitOffset);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	85 HeapWord* nextAddr = offsetToHeapWord(nextOffset);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	86 assert(nextAddr >= addr, "get_next_one postcondition");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	87 assert(nextAddr == limit \|\| !isMarked(nextAddr),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	88 "get_next_one postcondition");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	89 return nextAddr;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	90 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	91
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	92 int CMBitMapRO::heapWordDiffToOffsetDiff(size_t diff) const {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	93 assert((diff & ((1 << _shifter) - 1)) == 0, "argument check");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	94 return (int) (diff >> _shifter);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	95 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	96
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	97 #ifndef PRODUCT
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	98 bool CMBitMapRO::covers(ReservedSpace heap_rs) const {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	99 // assert(_bm.map() == _virtual_space.low(), "map inconsistency");
6750 859cd1a76f8a 7197906: BlockOffsetArray::power_to_cards_back() needs to handle > 32 bit shifts brutisso parents: 6725 diff changeset	100 assert(((size_t)_bm.size() * ((size_t)1 << _shifter)) == _bmWordSize,
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	101 "size inconsistency");
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	102 return _bmStartWord == (HeapWord*)(heap_rs.base()) &&
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	103 _bmWordSize == heap_rs.size()>>LogHeapWordSize;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	104 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	105 #endif
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	106
9076 7b835924c31c 8011872: Include Bit Map addresses in the hs_err files stefank parents: 8789 diff changeset	107 void CMBitMapRO::print_on_error(outputStream* st, const char* prefix) const {
7b835924c31c 8011872: Include Bit Map addresses in the hs_err files stefank parents: 8789 diff changeset	108 _bm.print_on_error(st, prefix);
7b835924c31c 8011872: Include Bit Map addresses in the hs_err files stefank parents: 8789 diff changeset	109 }
7b835924c31c 8011872: Include Bit Map addresses in the hs_err files stefank parents: 8789 diff changeset	110
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	111 bool CMBitMap::allocate(ReservedSpace heap_rs) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	112 _bmStartWord = (HeapWord*)(heap_rs.base());
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	113 _bmWordSize = heap_rs.size()/HeapWordSize; // heap_rs.size() is in bytes
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	114 ReservedSpace brs(ReservedSpace::allocation_align_size_up(
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	115 (_bmWordSize >> (_shifter + LogBitsPerByte)) + 1));
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	116 if (!brs.is_reserved()) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	117 warning("ConcurrentMark marking bit map allocation failure");
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	118 return false;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	119 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	120 MemTracker::record_virtual_memory_type((address)brs.base(), mtGC);
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	121 // For now we'll just commit all of the bit map up front.
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	122 // Later on we'll try to be more parsimonious with swap.
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	123 if (!_virtual_space.initialize(brs, brs.size())) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	124 warning("ConcurrentMark marking bit map backing store failure");
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	125 return false;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	126 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	127 assert(_virtual_space.committed_size() == brs.size(),
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	128 "didn't reserve backing store for all of concurrent marking bit map?");
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	129 _bm.set_map((uintptr_t*)_virtual_space.low());
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	130 assert(_virtual_space.committed_size() << (_shifter + LogBitsPerByte) >=
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	131 _bmWordSize, "inconsistency in bit map sizing");
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	132 _bm.set_size(_bmWordSize >> _shifter);
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	133 return true;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	134 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	135
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	136 void CMBitMap::clearAll() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	137 _bm.clear();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	138 return;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	139 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	140
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	141 void CMBitMap::markRange(MemRegion mr) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	142 mr.intersection(MemRegion(_bmStartWord, _bmWordSize));
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	143 assert(!mr.is_empty(), "unexpected empty region");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	144 assert((offsetToHeapWord(heapWordToOffset(mr.end())) ==
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	145 ((HeapWord *) mr.end())),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	146 "markRange memory region end is not card aligned");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	147 // convert address range into offset range
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	148 _bm.at_put_range(heapWordToOffset(mr.start()),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	149 heapWordToOffset(mr.end()), true);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	150 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	151
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	152 void CMBitMap::clearRange(MemRegion mr) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	153 mr.intersection(MemRegion(_bmStartWord, _bmWordSize));
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	154 assert(!mr.is_empty(), "unexpected empty region");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	155 // convert address range into offset range
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	156 _bm.at_put_range(heapWordToOffset(mr.start()),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	157 heapWordToOffset(mr.end()), false);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	158 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	159
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	160 MemRegion CMBitMap::getAndClearMarkedRegion(HeapWord* addr,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	161 HeapWord* end_addr) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	162 HeapWord* start = getNextMarkedWordAddress(addr);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	163 start = MIN2(start, end_addr);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	164 HeapWord* end = getNextUnmarkedWordAddress(start);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	165 end = MIN2(end, end_addr);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	166 assert(start <= end, "Consistency check");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	167 MemRegion mr(start, end);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	168 if (!mr.is_empty()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	169 clearRange(mr);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	170 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	171 return mr;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	172 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	173
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	174 CMMarkStack::CMMarkStack(ConcurrentMark* cm) :
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	175 _base(NULL), _cm(cm)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	176 #ifdef ASSERT
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	177 , _drain_in_progress(false)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	178 , _drain_in_progress_yields(false)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	179 #endif
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	180 {}
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	181
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	182 bool CMMarkStack::allocate(size_t capacity) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	183 // allocate a stack of the requisite depth
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	184 ReservedSpace rs(ReservedSpace::allocation_align_size_up(capacity * sizeof(oop)));
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	185 if (!rs.is_reserved()) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	186 warning("ConcurrentMark MarkStack allocation failure");
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	187 return false;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	188 }
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	189 MemTracker::record_virtual_memory_type((address)rs.base(), mtGC);
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	190 if (!_virtual_space.initialize(rs, rs.size())) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	191 warning("ConcurrentMark MarkStack backing store failure");
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	192 // Release the virtual memory reserved for the marking stack
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	193 rs.release();
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	194 return false;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	195 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	196 assert(_virtual_space.committed_size() == rs.size(),
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	197 "Didn't reserve backing store for all of ConcurrentMark stack?");
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	198 _base = (oop*) _virtual_space.low();
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	199 setEmpty();
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	200 _capacity = (jint) capacity;
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	201 _saved_index = -1;
7450 d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	202 _should_expand = false;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	203 NOT_PRODUCT(_max_depth = 0);
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	204 return true;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	205 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	206
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	207 void CMMarkStack::expand() {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	208 // Called, during remark, if we've overflown the marking stack during marking.
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	209 assert(isEmpty(), "stack should been emptied while handling overflow");
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	210 assert(_capacity <= (jint) MarkStackSizeMax, "stack bigger than permitted");
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	211 // Clear expansion flag
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	212 _should_expand = false;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	213 if (_capacity == (jint) MarkStackSizeMax) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	214 if (PrintGCDetails && Verbose) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	215 gclog_or_tty->print_cr(" (benign) Can't expand marking stack capacity, at max size limit");
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	216 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	217 return;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	218 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	219 // Double capacity if possible
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	220 jint new_capacity = MIN2(_capacity*2, (jint) MarkStackSizeMax);
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	221 // Do not give up existing stack until we have managed to
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	222 // get the double capacity that we desired.
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	223 ReservedSpace rs(ReservedSpace::allocation_align_size_up(new_capacity *
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	224 sizeof(oop)));
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	225 if (rs.is_reserved()) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	226 // Release the backing store associated with old stack
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	227 _virtual_space.release();
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	228 // Reinitialize virtual space for new stack
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	229 if (!_virtual_space.initialize(rs, rs.size())) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	230 fatal("Not enough swap for expanded marking stack capacity");
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	231 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	232 _base = (oop*)(_virtual_space.low());
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	233 _index = 0;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	234 _capacity = new_capacity;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	235 } else {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	236 if (PrintGCDetails && Verbose) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	237 // Failed to double capacity, continue;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	238 gclog_or_tty->print(" (benign) Failed to expand marking stack capacity from "
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	239 SIZE_FORMAT"K to " SIZE_FORMAT"K",
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	240 _capacity / K, new_capacity / K);
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	241 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	242 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	243 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	244
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	245 void CMMarkStack::set_should_expand() {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	246 // If we're resetting the marking state because of an
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	247 // marking stack overflow, record that we should, if
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	248 // possible, expand the stack.
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	249 _should_expand = _cm->has_overflown();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	250 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	251
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	252 CMMarkStack::~CMMarkStack() {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	253 if (_base != NULL) {
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	254 _base = NULL;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	255 _virtual_space.release();
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	256 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	257 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	258
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	259 void CMMarkStack::par_push(oop ptr) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	260 while (true) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	261 if (isFull()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	262 _overflow = true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	263 return;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	264 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	265 // Otherwise...
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	266 jint index = _index;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	267 jint next_index = index+1;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	268 jint res = Atomic::cmpxchg(next_index, &_index, index);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	269 if (res == index) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	270 _base[index] = ptr;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	271 // Note that we don't maintain this atomically. We could, but it
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	272 // doesn't seem necessary.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	273 NOT_PRODUCT(_max_depth = MAX2(_max_depth, next_index));
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	274 return;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	275 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	276 // Otherwise, we need to try again.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	277 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	278 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	279
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	280 void CMMarkStack::par_adjoin_arr(oop* ptr_arr, int n) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	281 while (true) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	282 if (isFull()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	283 _overflow = true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	284 return;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	285 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	286 // Otherwise...
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	287 jint index = _index;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	288 jint next_index = index + n;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	289 if (next_index > _capacity) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	290 _overflow = true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	291 return;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	292 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	293 jint res = Atomic::cmpxchg(next_index, &_index, index);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	294 if (res == index) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	295 for (int i = 0; i < n; i++) {
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	296 int ind = index + i;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	297 assert(ind < _capacity, "By overflow test above.");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	298 _base[ind] = ptr_arr[i];
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	299 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	300 NOT_PRODUCT(_max_depth = MAX2(_max_depth, next_index));
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	301 return;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	302 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	303 // Otherwise, we need to try again.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	304 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	305 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	306
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	307 void CMMarkStack::par_push_arr(oop* ptr_arr, int n) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	308 MutexLockerEx x(ParGCRareEvent_lock, Mutex::_no_safepoint_check_flag);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	309 jint start = _index;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	310 jint next_index = start + n;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	311 if (next_index > _capacity) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	312 _overflow = true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	313 return;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	314 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	315 // Otherwise.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	316 _index = next_index;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	317 for (int i = 0; i < n; i++) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	318 int ind = start + i;
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	319 assert(ind < _capacity, "By overflow test above.");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	320 _base[ind] = ptr_arr[i];
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	321 }
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	322 NOT_PRODUCT(_max_depth = MAX2(_max_depth, next_index));
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	323 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	324
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	325 bool CMMarkStack::par_pop_arr(oop* ptr_arr, int max, int* n) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	326 MutexLockerEx x(ParGCRareEvent_lock, Mutex::_no_safepoint_check_flag);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	327 jint index = _index;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	328 if (index == 0) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	329 *n = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	330 return false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	331 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	332 int k = MIN2(max, index);
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	333 jint new_ind = index - k;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	334 for (int j = 0; j < k; j++) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	335 ptr_arr[j] = _base[new_ind + j];
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	336 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	337 _index = new_ind;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	338 *n = k;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	339 return true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	340 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	341 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	343 template<class OopClosureClass>
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	344 bool CMMarkStack::drain(OopClosureClass* cl, CMBitMap* bm, bool yield_after) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	345 assert(!_drain_in_progress \|\| !_drain_in_progress_yields \|\| yield_after
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	346 \|\| SafepointSynchronize::is_at_safepoint(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	347 "Drain recursion must be yield-safe.");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	348 bool res = true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	349 debug_only(_drain_in_progress = true);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	350 debug_only(_drain_in_progress_yields = yield_after);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	351 while (!isEmpty()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	352 oop newOop = pop();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	353 assert(G1CollectedHeap::heap()->is_in_reserved(newOop), "Bad pop");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	354 assert(newOop->is_oop(), "Expected an oop");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	355 assert(bm == NULL \|\| bm->isMarked((HeapWord*)newOop),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	356 "only grey objects on this stack");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	357 newOop->oop_iterate(cl);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	358 if (yield_after && _cm->do_yield_check()) {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	359 res = false;
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	360 break;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	361 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	362 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	363 debug_only(_drain_in_progress = false);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	364 return res;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	365 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	366
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	367 void CMMarkStack::note_start_of_gc() {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	368 assert(_saved_index == -1,
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	369 "note_start_of_gc()/end_of_gc() bracketed incorrectly");
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	370 _saved_index = _index;
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	371 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	372
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	373 void CMMarkStack::note_end_of_gc() {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	374 // This is intentionally a guarantee, instead of an assert. If we
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	375 // accidentally add something to the mark stack during GC, it
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	376 // will be a correctness issue so it's better if we crash. we'll
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	377 // only check this once per GC anyway, so it won't be a performance
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	378 // issue in any way.
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	379 guarantee(_saved_index == _index,
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	380 err_msg("saved index: %d index: %d", _saved_index, _index));
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	381 _saved_index = -1;
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	382 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	383
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	384 void CMMarkStack::oops_do(OopClosure* f) {
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	385 assert(_saved_index == _index,
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	386 err_msg("saved index: %d index: %d", _saved_index, _index));
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	387 for (int i = 0; i < _index; i += 1) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	388 f->do_oop(&_base[i]);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	389 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	390 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	391
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	392 bool ConcurrentMark::not_yet_marked(oop obj) const {
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6254 diff changeset	393 return _g1h->is_obj_ill(obj);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	394 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	395
4837 eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	396 CMRootRegions::CMRootRegions() :
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	397 _young_list(NULL), _cm(NULL), _scan_in_progress(false),
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	398 _should_abort(false), _next_survivor(NULL) { }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	399
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	400 void CMRootRegions::init(G1CollectedHeap* g1h, ConcurrentMark* cm) {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	401 _young_list = g1h->young_list();
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	402 _cm = cm;
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	403 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	404
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	405 void CMRootRegions::prepare_for_scan() {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	406 assert(!scan_in_progress(), "pre-condition");
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	407
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	408 // Currently, only survivors can be root regions.
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	409 assert(_next_survivor == NULL, "pre-condition");
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	410 _next_survivor = _young_list->first_survivor_region();
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	411 _scan_in_progress = (_next_survivor != NULL);
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	412 _should_abort = false;
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	413 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	414
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	415 HeapRegion* CMRootRegions::claim_next() {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	416 if (_should_abort) {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	417 // If someone has set the should_abort flag, we return NULL to
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	418 // force the caller to bail out of their loop.
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	419 return NULL;
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	420 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	421
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	422 // Currently, only survivors can be root regions.
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	423 HeapRegion* res = _next_survivor;
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	424 if (res != NULL) {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	425 MutexLockerEx x(RootRegionScan_lock, Mutex::_no_safepoint_check_flag);
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	426 // Read it again in case it changed while we were waiting for the lock.
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	427 res = _next_survivor;
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	428 if (res != NULL) {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	429 if (res == _young_list->last_survivor_region()) {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	430 // We just claimed the last survivor so store NULL to indicate
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	431 // that we're done.
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	432 _next_survivor = NULL;
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	433 } else {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	434 _next_survivor = res->get_next_young_region();
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	435 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	436 } else {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	437 // Someone else claimed the last survivor while we were trying
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	438 // to take the lock so nothing else to do.
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	439 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	440 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	441 assert(res == NULL \|\| res->is_survivor(), "post-condition");
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	442
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	443 return res;
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	444 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	445
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	446 void CMRootRegions::scan_finished() {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	447 assert(scan_in_progress(), "pre-condition");
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	448
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	449 // Currently, only survivors can be root regions.
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	450 if (!_should_abort) {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	451 assert(_next_survivor == NULL, "we should have claimed all survivors");
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	452 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	453 _next_survivor = NULL;
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	454
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	455 {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	456 MutexLockerEx x(RootRegionScan_lock, Mutex::_no_safepoint_check_flag);
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	457 _scan_in_progress = false;
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	458 RootRegionScan_lock->notify_all();
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	459 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	460 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	461
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	462 bool CMRootRegions::wait_until_scan_finished() {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	463 if (!scan_in_progress()) return false;
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	464
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	465 {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	466 MutexLockerEx x(RootRegionScan_lock, Mutex::_no_safepoint_check_flag);
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	467 while (scan_in_progress()) {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	468 RootRegionScan_lock->wait(Mutex::_no_safepoint_check_flag);
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	469 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	470 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	471 return true;
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	472 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	473
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	474 #ifdef _MSC_VER // the use of 'this' below gets a warning, make it go away
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	475 #pragma warning( disable:4355 ) // 'this' : used in base member initializer list
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	476 #endif // _MSC_VER
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	477
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	478 uint ConcurrentMark::scale_parallel_threads(uint n_par_threads) {
441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	479 return MAX2((n_par_threads + 2) / 4, 1U);
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	480 }
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	481
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	482 ConcurrentMark::ConcurrentMark(G1CollectedHeap* g1h, ReservedSpace heap_rs) :
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	483 _g1h(g1h),
12229 ff218fdb30ba 8021823: G1: Concurrent marking crashes with -XX:ObjectAlignmentInBytes>=32 in 64bit VMs tschatzl parents: 12080 diff changeset	484 _markBitMap1(log2_intptr(MinObjAlignment)),
ff218fdb30ba 8021823: G1: Concurrent marking crashes with -XX:ObjectAlignmentInBytes>=32 in 64bit VMs tschatzl parents: 12080 diff changeset	485 _markBitMap2(log2_intptr(MinObjAlignment)),
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	486 _parallel_marking_threads(0),
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	487 _max_parallel_marking_threads(0),
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	488 _sleep_factor(0.0),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	489 _marking_task_overhead(1.0),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	490 _cleanup_sleep_factor(0.0),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	491 _cleanup_task_overhead(1.0),
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	492 _cleanup_list("Cleanup List"),
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	493 _region_bm((BitMap::idx_t)(g1h->max_regions()), false /* in_resource_area*/),
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	494 _card_bm((heap_rs.size() + CardTableModRefBS::card_size - 1) >>
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	495 CardTableModRefBS::card_shift,
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	496 false /* in_resource_area*/),
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	497
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	498 _prevMarkBitMap(&_markBitMap1),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	499 _nextMarkBitMap(&_markBitMap2),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	500
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	501 _markStack(this),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	502 // _finger set in set_non_marking_state
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	503
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	504 _max_worker_id(MAX2((uint)ParallelGCThreads, 1U)),
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	505 // _active_tasks set in set_non_marking_state
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	506 // _tasks set inside the constructor
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	507 _task_queues(new CMTaskQueueSet((int) _max_worker_id)),
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	508 _terminator(ParallelTaskTerminator((int) _max_worker_id, _task_queues)),
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	509
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	510 _has_overflown(false),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	511 _concurrent(false),
619 7ea5ca260b28 6814467: G1: small fixes related to concurrent marking verboseness tonyp parents: 470 diff changeset	512 _has_aborted(false),
7ea5ca260b28 6814467: G1: small fixes related to concurrent marking verboseness tonyp parents: 470 diff changeset	513 _restart_for_overflow(false),
7ea5ca260b28 6814467: G1: small fixes related to concurrent marking verboseness tonyp parents: 470 diff changeset	514 _concurrent_marking_in_progress(false),
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	515
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	516 // _verbose_level set below
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	517
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	518 _init_times(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	519 _remark_times(), _remark_mark_times(), _remark_weak_ref_times(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	520 _cleanup_times(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	521 _total_counting_time(0.0),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	522 _total_rs_scrub_time(0.0),
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	523
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	524 _parallel_workers(NULL),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	525
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	526 _count_card_bitmaps(NULL),
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	527 _count_marked_bytes(NULL),
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	528 _completed_initialization(false) {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	529 CMVerboseLevel verbose_level = (CMVerboseLevel) G1MarkingVerboseLevel;
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	530 if (verbose_level < no_verbose) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	531 verbose_level = no_verbose;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	532 }
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	533 if (verbose_level > high_verbose) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	534 verbose_level = high_verbose;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	535 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	536 _verbose_level = verbose_level;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	537
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	538 if (verbose_low()) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	539 gclog_or_tty->print_cr("[global] init, heap start = "PTR_FORMAT", "
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	540 "heap end = "PTR_FORMAT, _heap_start, _heap_end);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	541 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	542
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	543 if (!_markBitMap1.allocate(heap_rs)) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	544 warning("Failed to allocate first CM bit map");
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	545 return;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	546 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	547 if (!_markBitMap2.allocate(heap_rs)) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	548 warning("Failed to allocate second CM bit map");
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	549 return;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	550 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	551
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	552 // Create & start a ConcurrentMark thread.
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	553 _cmThread = new ConcurrentMarkThread(this);
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	554 assert(cmThread() != NULL, "CM Thread should have been created");
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	555 assert(cmThread()->cm() != NULL, "CM Thread should refer to this cm");
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	556
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	557 assert(CGC_lock != NULL, "Where's the CGC_lock?");
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	558 assert(_markBitMap1.covers(heap_rs), "_markBitMap1 inconsistency");
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	559 assert(_markBitMap2.covers(heap_rs), "_markBitMap2 inconsistency");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	560
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	561 SATBMarkQueueSet& satb_qs = JavaThread::satb_mark_queue_set();
1282 b81f3572f355 6928059: G1: command line parameter renaming tonyp parents: 1111 diff changeset	562 satb_qs.set_buffer_size(G1SATBBufferSize);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	563
4837 eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	564 _root_regions.init(_g1h, this);
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	565
1284 5f1f51edaff6 6928081: G1: rename parameters common with CMS jmasa parents: 1282 diff changeset	566 if (ConcGCThreads > ParallelGCThreads) {
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	567 warning("Can't have more ConcGCThreads (" UINT32_FORMAT ") "
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	568 "than ParallelGCThreads (" UINT32_FORMAT ").",
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	569 ConcGCThreads, ParallelGCThreads);
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	570 return;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	571 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	572 if (ParallelGCThreads == 0) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	573 // if we are not running with any parallel GC threads we will not
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	574 // spawn any marking threads either
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	575 _parallel_marking_threads = 0;
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	576 _max_parallel_marking_threads = 0;
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	577 _sleep_factor = 0.0;
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	578 _marking_task_overhead = 1.0;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	579 } else {
8006 4700e77d44c1 8006894: G1: Number of marking threads missing from PrintFlagsFinal output johnc parents: 7450 diff changeset	580 if (!FLAG_IS_DEFAULT(ConcGCThreads) && ConcGCThreads > 0) {
4700e77d44c1 8006894: G1: Number of marking threads missing from PrintFlagsFinal output johnc parents: 7450 diff changeset	581 // Note: ConcGCThreads has precedence over G1MarkingOverheadPercent
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	582 // if both are set
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	583 _sleep_factor = 0.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	584 _marking_task_overhead = 1.0;
751 20c6f43950b5 6490395: G1: Tidy up command line flags. johnc parents: 647 diff changeset	585 } else if (G1MarkingOverheadPercent > 0) {
8006 4700e77d44c1 8006894: G1: Number of marking threads missing from PrintFlagsFinal output johnc parents: 7450 diff changeset	586 // We will calculate the number of parallel marking threads based
4700e77d44c1 8006894: G1: Number of marking threads missing from PrintFlagsFinal output johnc parents: 7450 diff changeset	587 // on a target overhead with respect to the soft real-time goal
751 20c6f43950b5 6490395: G1: Tidy up command line flags. johnc parents: 647 diff changeset	588 double marking_overhead = (double) G1MarkingOverheadPercent / 100.0;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	589 double overall_cm_overhead =
751 20c6f43950b5 6490395: G1: Tidy up command line flags. johnc parents: 647 diff changeset	590 (double) MaxGCPauseMillis * marking_overhead /
20c6f43950b5 6490395: G1: Tidy up command line flags. johnc parents: 647 diff changeset	591 (double) GCPauseIntervalMillis;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	592 double cpu_ratio = 1.0 / (double) os::processor_count();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	593 double marking_thread_num = ceil(overall_cm_overhead / cpu_ratio);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	594 double marking_task_overhead =
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	595 overall_cm_overhead / marking_thread_num *
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	596 (double) os::processor_count();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	597 double sleep_factor =
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	598 (1.0 - marking_task_overhead) / marking_task_overhead;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	599
8006 4700e77d44c1 8006894: G1: Number of marking threads missing from PrintFlagsFinal output johnc parents: 7450 diff changeset	600 FLAG_SET_ERGO(uintx, ConcGCThreads, (uint) marking_thread_num);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	601 _sleep_factor = sleep_factor;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	602 _marking_task_overhead = marking_task_overhead;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	603 } else {
8006 4700e77d44c1 8006894: G1: Number of marking threads missing from PrintFlagsFinal output johnc parents: 7450 diff changeset	604 // Calculate the number of parallel marking threads by scaling
4700e77d44c1 8006894: G1: Number of marking threads missing from PrintFlagsFinal output johnc parents: 7450 diff changeset	605 // the number of parallel GC threads.
4700e77d44c1 8006894: G1: Number of marking threads missing from PrintFlagsFinal output johnc parents: 7450 diff changeset	606 uint marking_thread_num = scale_parallel_threads((uint) ParallelGCThreads);
4700e77d44c1 8006894: G1: Number of marking threads missing from PrintFlagsFinal output johnc parents: 7450 diff changeset	607 FLAG_SET_ERGO(uintx, ConcGCThreads, marking_thread_num);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	608 _sleep_factor = 0.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	609 _marking_task_overhead = 1.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	610 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	611
8006 4700e77d44c1 8006894: G1: Number of marking threads missing from PrintFlagsFinal output johnc parents: 7450 diff changeset	612 assert(ConcGCThreads > 0, "Should have been set");
4700e77d44c1 8006894: G1: Number of marking threads missing from PrintFlagsFinal output johnc parents: 7450 diff changeset	613 _parallel_marking_threads = (uint) ConcGCThreads;
4700e77d44c1 8006894: G1: Number of marking threads missing from PrintFlagsFinal output johnc parents: 7450 diff changeset	614 _max_parallel_marking_threads = _parallel_marking_threads;
4700e77d44c1 8006894: G1: Number of marking threads missing from PrintFlagsFinal output johnc parents: 7450 diff changeset	615
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	616 if (parallel_marking_threads() > 1) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	617 _cleanup_task_overhead = 1.0;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	618 } else {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	619 _cleanup_task_overhead = marking_task_overhead();
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	620 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	621 _cleanup_sleep_factor =
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	622 (1.0 - cleanup_task_overhead()) / cleanup_task_overhead();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	623
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	624 #if 0
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	625 gclog_or_tty->print_cr("Marking Threads %d", parallel_marking_threads());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	626 gclog_or_tty->print_cr("CM Marking Task Overhead %1.4lf", marking_task_overhead());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	627 gclog_or_tty->print_cr("CM Sleep Factor %1.4lf", sleep_factor());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	628 gclog_or_tty->print_cr("CL Marking Task Overhead %1.4lf", cleanup_task_overhead());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	629 gclog_or_tty->print_cr("CL Sleep Factor %1.4lf", cleanup_sleep_factor());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	630 #endif
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	631
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	632 guarantee(parallel_marking_threads() > 0, "peace of mind");
1833 8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1719 diff changeset	633 _parallel_workers = new FlexibleWorkGang("G1 Parallel Marking Threads",
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	634 _max_parallel_marking_threads, false, true);
1833 8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1719 diff changeset	635 if (_parallel_workers == NULL) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	636 vm_exit_during_initialization("Failed necessary allocation.");
1833 8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1719 diff changeset	637 } else {
8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1719 diff changeset	638 _parallel_workers->initialize_workers();
8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1719 diff changeset	639 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	640 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	641
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	642 if (FLAG_IS_DEFAULT(MarkStackSize)) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	643 uintx mark_stack_size =
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	644 MIN2(MarkStackSizeMax,
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	645 MAX2(MarkStackSize, (uintx) (parallel_marking_threads() * TASKQUEUE_SIZE)));
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	646 // Verify that the calculated value for MarkStackSize is in range.
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	647 // It would be nice to use the private utility routine from Arguments.
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	648 if (!(mark_stack_size >= 1 && mark_stack_size <= MarkStackSizeMax)) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	649 warning("Invalid value calculated for MarkStackSize (" UINTX_FORMAT "): "
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	650 "must be between " UINTX_FORMAT " and " UINTX_FORMAT,
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	651 mark_stack_size, 1, MarkStackSizeMax);
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	652 return;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	653 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	654 FLAG_SET_ERGO(uintx, MarkStackSize, mark_stack_size);
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	655 } else {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	656 // Verify MarkStackSize is in range.
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	657 if (FLAG_IS_CMDLINE(MarkStackSize)) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	658 if (FLAG_IS_DEFAULT(MarkStackSizeMax)) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	659 if (!(MarkStackSize >= 1 && MarkStackSize <= MarkStackSizeMax)) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	660 warning("Invalid value specified for MarkStackSize (" UINTX_FORMAT "): "
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	661 "must be between " UINTX_FORMAT " and " UINTX_FORMAT,
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	662 MarkStackSize, 1, MarkStackSizeMax);
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	663 return;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	664 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	665 } else if (FLAG_IS_CMDLINE(MarkStackSizeMax)) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	666 if (!(MarkStackSize >= 1 && MarkStackSize <= MarkStackSizeMax)) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	667 warning("Invalid value specified for MarkStackSize (" UINTX_FORMAT ")"
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	668 " or for MarkStackSizeMax (" UINTX_FORMAT ")",
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	669 MarkStackSize, MarkStackSizeMax);
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	670 return;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	671 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	672 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	673 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	674 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	675
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	676 if (!_markStack.allocate(MarkStackSize)) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	677 warning("Failed to allocate CM marking stack");
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	678 return;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	679 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	680
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	681 _tasks = NEW_C_HEAP_ARRAY(CMTask*, _max_worker_id, mtGC);
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	682 _accum_task_vtime = NEW_C_HEAP_ARRAY(double, _max_worker_id, mtGC);
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	683
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	684 _count_card_bitmaps = NEW_C_HEAP_ARRAY(BitMap, _max_worker_id, mtGC);
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	685 _count_marked_bytes = NEW_C_HEAP_ARRAY(size_t*, _max_worker_id, mtGC);
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	686
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	687 BitMap::idx_t card_bm_size = _card_bm.size();
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	688
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	689 // so that the assertion in MarkingTaskQueue::task_queue doesn't fail
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	690 _active_tasks = _max_worker_id;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	691
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	692 size_t max_regions = (size_t) _g1h->max_regions();
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	693 for (uint i = 0; i < _max_worker_id; ++i) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	694 CMTaskQueue* task_queue = new CMTaskQueue();
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	695 task_queue->initialize();
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	696 _task_queues->register_queue(i, task_queue);
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	697
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	698 _count_card_bitmaps[i] = BitMap(card_bm_size, false);
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	699 _count_marked_bytes[i] = NEW_C_HEAP_ARRAY(size_t, max_regions, mtGC);
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	700
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	701 _tasks[i] = new CMTask(i, this,
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	702 _count_marked_bytes[i],
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	703 &_count_card_bitmaps[i],
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	704 task_queue, _task_queues);
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	705
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	706 _accum_task_vtime[i] = 0.0;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	707 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	708
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	709 // Calculate the card number for the bottom of the heap. Used
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	710 // in biasing indexes into the accounting card bitmaps.
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	711 _heap_bottom_card_num =
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	712 intptr_t(uintptr_t(_g1h->reserved_region().start()) >>
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	713 CardTableModRefBS::card_shift);
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	714
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	715 // Clear all the liveness counting data
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	716 clear_all_count_data();
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	717
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	718 // so that the call below can read a sensible value
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	719 _heap_start = (HeapWord*) heap_rs.base();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	720 set_non_marking_state();
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	721 _completed_initialization = true;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	722 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	723
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	724 void ConcurrentMark::update_g1_committed(bool force) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	725 // If concurrent marking is not in progress, then we do not need to
5988 2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	726 // update _heap_end.
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	727 if (!concurrent_marking_in_progress() && !force) return;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	728
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	729 MemRegion committed = _g1h->g1_committed();
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	730 assert(committed.start() == _heap_start, "start shouldn't change");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	731 HeapWord* new_end = committed.end();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	732 if (new_end > _heap_end) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	733 // The heap has been expanded.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	734
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	735 _heap_end = new_end;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	736 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	737 // Notice that the heap can also shrink. However, this only happens
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	738 // during a Full GC (at least currently) and the entire marking
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	739 // phase will bail out and the task will not be restarted. So, let's
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	740 // do nothing.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	741 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	742
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	743 void ConcurrentMark::reset() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	744 // Starting values for these two. This should be called in a STW
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	745 // phase. CM will be notified of any future g1_committed expansions
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	746 // will be at the end of evacuation pauses, when tasks are
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	747 // inactive.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	748 MemRegion committed = _g1h->g1_committed();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	749 _heap_start = committed.start();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	750 _heap_end = committed.end();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	751
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	752 // Separated the asserts so that we know which one fires.
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	753 assert(_heap_start != NULL, "heap bounds should look ok");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	754 assert(_heap_end != NULL, "heap bounds should look ok");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	755 assert(_heap_start < _heap_end, "heap bounds should look ok");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	756
7450 d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	757 // Reset all the marking data structures and any necessary flags
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	758 reset_marking_state();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	759
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	760 if (verbose_low()) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	761 gclog_or_tty->print_cr("[global] resetting");
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	762 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	763
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	764 // We do reset all of them, since different phases will use
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	765 // different number of active threads. So, it's easiest to have all
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	766 // of them ready.
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	767 for (uint i = 0; i < _max_worker_id; ++i) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	768 _tasks[i]->reset(_nextMarkBitMap);
1835 4805b9f4779e 6941395: G1: Use only lock-free versions of region stack push() and pop() johnc parents: 1833 diff changeset	769 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	770
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	771 // we need this to make sure that the flag is on during the evac
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	772 // pause with initial mark piggy-backed
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	773 set_concurrent_marking_in_progress();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	774 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	775
7450 d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	776
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	777 void ConcurrentMark::reset_marking_state(bool clear_overflow) {
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	778 _markStack.set_should_expand();
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	779 _markStack.setEmpty(); // Also clears the _markStack overflow flag
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	780 if (clear_overflow) {
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	781 clear_has_overflown();
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	782 } else {
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	783 assert(has_overflown(), "pre-condition");
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	784 }
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	785 _finger = _heap_start;
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	786
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	787 for (uint i = 0; i < _max_worker_id; ++i) {
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	788 CMTaskQueue* queue = _task_queues->queue(i);
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	789 queue->set_empty();
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	790 }
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	791 }
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	792
8788 e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	793 void ConcurrentMark::set_concurrency(uint active_tasks) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	794 assert(active_tasks <= _max_worker_id, "we should not have more");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	795
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	796 _active_tasks = active_tasks;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	797 // Need to update the three data structures below according to the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	798 // number of active threads for this phase.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	799 _terminator = ParallelTaskTerminator((int) active_tasks, _task_queues);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	800 _first_overflow_barrier_sync.set_n_workers((int) active_tasks);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	801 _second_overflow_barrier_sync.set_n_workers((int) active_tasks);
8788 e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	802 }
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	803
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	804 void ConcurrentMark::set_concurrency_and_phase(uint active_tasks, bool concurrent) {
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	805 set_concurrency(active_tasks);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	806
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	807 _concurrent = concurrent;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	808 // We propagate this to all tasks, not just the active ones.
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	809 for (uint i = 0; i < _max_worker_id; ++i)
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	810 _tasks[i]->set_concurrent(concurrent);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	811
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	812 if (concurrent) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	813 set_concurrent_marking_in_progress();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	814 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	815 // We currently assume that the concurrent flag has been set to
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	816 // false before we start remark. At this point we should also be
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	817 // in a STW phase.
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	818 assert(!concurrent_marking_in_progress(), "invariant");
8788 e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	819 assert(_finger == _heap_end,
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	820 err_msg("only way to get here: _finger: "PTR_FORMAT", _heap_end: "PTR_FORMAT,
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	821 _finger, _heap_end));
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	822 update_g1_committed(true);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	823 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	824 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	825
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	826 void ConcurrentMark::set_non_marking_state() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	827 // We set the global marking state to some default values when we're
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	828 // not doing marking.
7450 d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	829 reset_marking_state();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	830 _active_tasks = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	831 clear_concurrent_marking_in_progress();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	832 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	833
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	834 ConcurrentMark::~ConcurrentMark() {
4735 776173fc2df9 7125516: G1: ~ConcurrentMark() frees incorrectly stefank parents: 4728 diff changeset	835 // The ConcurrentMark instance is never freed.
776173fc2df9 7125516: G1: ~ConcurrentMark() frees incorrectly stefank parents: 4728 diff changeset	836 ShouldNotReachHere();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	837 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	838
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	839 void ConcurrentMark::clearNextBitmap() {
1359 23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	840 G1CollectedHeap* g1h = G1CollectedHeap::heap();
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	841 G1CollectorPolicy* g1p = g1h->g1_policy();
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	842
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	843 // Make sure that the concurrent mark thread looks to still be in
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	844 // the current cycle.
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	845 guarantee(cmThread()->during_cycle(), "invariant");
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	846
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	847 // We are finishing up the current cycle by clearing the next
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	848 // marking bitmap and getting it ready for the next cycle. During
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	849 // this time no other cycle can start. So, let's make sure that this
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	850 // is the case.
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	851 guarantee(!g1h->mark_in_progress(), "invariant");
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	852
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	853 // clear the mark bitmap (no grey objects to start with).
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	854 // We need to do this in chunks and offer to yield in between
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	855 // each chunk.
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	856 HeapWord* start = _nextMarkBitMap->startWord();
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	857 HeapWord* end = _nextMarkBitMap->endWord();
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	858 HeapWord* cur = start;
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	859 size_t chunkSize = M;
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	860 while (cur < end) {
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	861 HeapWord* next = cur + chunkSize;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	862 if (next > end) {
1359 23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	863 next = end;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	864 }
1359 23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	865 MemRegion mr(cur,next);
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	866 _nextMarkBitMap->clearRange(mr);
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	867 cur = next;
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	868 do_yield_check();
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	869
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	870 // Repeat the asserts from above. We'll do them as asserts here to
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	871 // minimize their overhead on the product. However, we'll have
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	872 // them as guarantees at the beginning / end of the bitmap
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	873 // clearing to get some checking in the product.
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	874 assert(cmThread()->during_cycle(), "invariant");
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	875 assert(!g1h->mark_in_progress(), "invariant");
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	876 }
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	877
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	878 // Clear the liveness counting data
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	879 clear_all_count_data();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	880
1359 23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	881 // Repeat the asserts from above.
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	882 guarantee(cmThread()->during_cycle(), "invariant");
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	883 guarantee(!g1h->mark_in_progress(), "invariant");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	884 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	885
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	886 class NoteStartOfMarkHRClosure: public HeapRegionClosure {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	887 public:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	888 bool doHeapRegion(HeapRegion* r) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	889 if (!r->continuesHumongous()) {
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	890 r->note_start_of_marking();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	891 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	892 return false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	893 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	894 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	895
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	896 void ConcurrentMark::checkpointRootsInitialPre() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	897 G1CollectedHeap* g1h = G1CollectedHeap::heap();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	898 G1CollectorPolicy* g1p = g1h->g1_policy();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	899
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	900 _has_aborted = false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	901
1547 fb1a39993f69 6951319: enable solaris builds using Sun Studio 12 update 1 jcoomes parents: 1388 diff changeset	902 #ifndef PRODUCT
1044 6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	903 if (G1PrintReachableAtInitialMark) {
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	904 print_reachable("at-cycle-start",
3772 6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	905 VerifyOption_G1UsePrevMarking, true /* all */);
1044 6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	906 }
1547 fb1a39993f69 6951319: enable solaris builds using Sun Studio 12 update 1 jcoomes parents: 1388 diff changeset	907 #endif
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	908
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	909 // Initialise marking structures. This has to be done in a STW phase.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	910 reset();
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	911
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	912 // For each region note start of marking.
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	913 NoteStartOfMarkHRClosure startcl;
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	914 g1h->heap_region_iterate(&startcl);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	915 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	916
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	917
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	918 void ConcurrentMark::checkpointRootsInitialPost() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	919 G1CollectedHeap* g1h = G1CollectedHeap::heap();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	920
3316 cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	921 // If we force an overflow during remark, the remark operation will
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	922 // actually abort and we'll restart concurrent marking. If we always
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	923 // force an oveflow during remark we'll never actually complete the
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	924 // marking phase. So, we initilize this here, at the start of the
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	925 // cycle, so that at the remaining overflow number will decrease at
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	926 // every remark and we'll eventually not need to cause one.
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	927 force_overflow_stw()->init();
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	928
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	929 // Start Concurrent Marking weak-reference discovery.
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	930 ReferenceProcessor* rp = g1h->ref_processor_cm();
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	931 // enable ("weak") refs discovery
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	932 rp->enable_discovery(true /verify_disabled/, true /verify_no_refs/);
457 27a80744a83b 6778647: snap(), snap_policy() should be renamed setup(), setup_policy() ysr parents: 453 diff changeset	933 rp->setup_policy(false); // snapshot the soft ref policy to be used in this cycle
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	934
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	935 SATBMarkQueueSet& satb_mq_set = JavaThread::satb_mark_queue_set();
1317 d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1314 diff changeset	936 // This is the start of the marking cycle, we're expected all
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1314 diff changeset	937 // threads to have SATB queues with active set to false.
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1314 diff changeset	938 satb_mq_set.set_active_all_threads(true, /* new active value */
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1314 diff changeset	939 false /* expected_active */);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	940
4837 eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	941 _root_regions.prepare_for_scan();
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	942
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	943 // update_g1_committed() will be called at the end of an evac pause
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	944 // when marking is on. So, it's also called at the end of the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	945 // initial-mark pause to update the heap end, if the heap expands
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	946 // during it. No need to call it here.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	947 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	948
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	949 /*
3316 cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	950 * Notice that in the next two methods, we actually leave the STS
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	951 * during the barrier sync and join it immediately afterwards. If we
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	952 * do not do this, the following deadlock can occur: one thread could
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	953 * be in the barrier sync code, waiting for the other thread to also
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	954 * sync up, whereas another one could be trying to yield, while also
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	955 * waiting for the other threads to sync up too.
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	956 *
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	957 * Note, however, that this code is also used during remark and in
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	958 * this case we should not attempt to leave / enter the STS, otherwise
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	959 * we'll either hit an asseert (debug / fastdebug) or deadlock
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	960 * (product). So we should only leave / enter the STS if we are
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	961 * operating concurrently.
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	962 *
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	963 * Because the thread that does the sync barrier has left the STS, it
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	964 * is possible to be suspended for a Full GC or an evacuation pause
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	965 * could occur. This is actually safe, since the entering the sync
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	966 * barrier is one of the last things do_marking_step() does, and it
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	967 * doesn't manipulate any data structures afterwards.
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	968 */
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	969
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	970 void ConcurrentMark::enter_first_sync_barrier(uint worker_id) {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	971 if (verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	972 gclog_or_tty->print_cr("[%u] entering first barrier", worker_id);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	973 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	974
3316 cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	975 if (concurrent()) {
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	976 ConcurrentGCThread::stsLeave();
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	977 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	978 _first_overflow_barrier_sync.enter();
3316 cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	979 if (concurrent()) {
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	980 ConcurrentGCThread::stsJoin();
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	981 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	982 // at this point everyone should have synced up and not be doing any
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	983 // more work
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	984
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	985 if (verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	986 gclog_or_tty->print_cr("[%u] leaving first barrier", worker_id);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	987 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	988
8788 e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	989 // If we're executing the concurrent phase of marking, reset the marking
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	990 // state; otherwise the marking state is reset after reference processing,
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	991 // during the remark pause.
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	992 // If we reset here as a result of an overflow during the remark we will
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	993 // see assertion failures from any subsequent set_concurrency_and_phase()
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	994 // calls.
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	995 if (concurrent()) {
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	996 // let the task associated with with worker 0 do this
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	997 if (worker_id == 0) {
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	998 // task 0 is responsible for clearing the global data structures
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	999 // We should be here because of an overflow. During STW we should
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	1000 // not clear the overflow flag since we rely on it being true when
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	1001 // we exit this method to abort the pause and restart concurent
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	1002 // marking.
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	1003 reset_marking_state(true /* clear_overflow */);
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	1004 force_overflow()->update();
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	1005
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	1006 if (G1Log::fine()) {
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	1007 gclog_or_tty->date_stamp(PrintGCDateStamps);
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	1008 gclog_or_tty->stamp(PrintGCTimeStamps);
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	1009 gclog_or_tty->print_cr("[GC concurrent-mark-reset-for-overflow]");
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	1010 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1011 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1012 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1013
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1014 // after this, each task should reset its own data structures then
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1015 // then go into the second barrier
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1016 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1017
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	1018 void ConcurrentMark::enter_second_sync_barrier(uint worker_id) {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	1019 if (verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	1020 gclog_or_tty->print_cr("[%u] entering second barrier", worker_id);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	1021 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1022
3316 cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1023 if (concurrent()) {
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1024 ConcurrentGCThread::stsLeave();
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1025 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1026 _second_overflow_barrier_sync.enter();
3316 cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1027 if (concurrent()) {
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1028 ConcurrentGCThread::stsJoin();
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1029 }
8788 e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	1030 // at this point everything should be re-initialized and ready to go
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1031
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	1032 if (verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	1033 gclog_or_tty->print_cr("[%u] leaving second barrier", worker_id);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	1034 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1035 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1036
3316 cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1037 #ifndef PRODUCT
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1038 void ForceOverflowSettings::init() {
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1039 _num_remaining = G1ConcMarkForceOverflow;
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1040 _force = false;
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1041 update();
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1042 }
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1043
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1044 void ForceOverflowSettings::update() {
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1045 if (_num_remaining > 0) {
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1046 _num_remaining -= 1;
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1047 _force = true;
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1048 } else {
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1049 _force = false;
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1050 }
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1051 }
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1052
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1053 bool ForceOverflowSettings::should_force() {
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1054 if (_force) {
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1055 _force = false;
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1056 return true;
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1057 } else {
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1058 return false;
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1059 }
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1060 }
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1061 #endif // !PRODUCT
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1062
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1063 class CMConcurrentMarkingTask: public AbstractGangTask {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1064 private:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1065 ConcurrentMark* _cm;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1066 ConcurrentMarkThread* _cmt;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1067
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1068 public:
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1069 void work(uint worker_id) {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	1070 assert(Thread::current()->is_ConcurrentGC_thread(),
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	1071 "this should only be done by a conc GC thread");
1974 fd1d227ef1b9 6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent johnc parents: 1972 diff changeset	1072 ResourceMark rm;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1073
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1074 double start_vtime = os::elapsedVTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1075
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1076 ConcurrentGCThread::stsJoin();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1077
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1078 assert(worker_id < _cm->active_tasks(), "invariant");
441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1079 CMTask* the_task = _cm->task(worker_id);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1080 the_task->record_start_time();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1081 if (!_cm->has_aborted()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1082 do {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1083 double start_vtime_sec = os::elapsedVTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1084 double start_time_sec = os::elapsedTime();
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	1085 double mark_step_duration_ms = G1ConcMarkStepDurationMillis;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	1086
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	1087 the_task->do_marking_step(mark_step_duration_ms,
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	1088 true /* do_termination */,
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	1089 false /* is_serial*/);
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	1090
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1091 double end_time_sec = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1092 double end_vtime_sec = os::elapsedVTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1093 double elapsed_vtime_sec = end_vtime_sec - start_vtime_sec;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1094 double elapsed_time_sec = end_time_sec - start_time_sec;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1095 _cm->clear_has_overflown();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1096
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1097 bool ret = _cm->do_yield_check(worker_id);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1098
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1099 jlong sleep_time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1100 if (!_cm->has_aborted() && the_task->has_aborted()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1101 sleep_time_ms =
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1102 (jlong) (elapsed_vtime_sec * _cm->sleep_factor() * 1000.0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1103 ConcurrentGCThread::stsLeave();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1104 os::sleep(Thread::current(), sleep_time_ms, false);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1105 ConcurrentGCThread::stsJoin();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1106 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1107 double end_time2_sec = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1108 double elapsed_time2_sec = end_time2_sec - start_time_sec;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1109
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1110 #if 0
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1111 gclog_or_tty->print_cr("CM: elapsed %1.4lf ms, sleep %1.4lf ms, "
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1112 "overhead %1.4lf",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1113 elapsed_vtime_sec * 1000.0, (double) sleep_time_ms,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1114 the_task->conc_overhead(os::elapsedTime()) * 8.0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1115 gclog_or_tty->print_cr("elapsed time %1.4lf ms, time 2: %1.4lf ms",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1116 elapsed_time_sec * 1000.0, elapsed_time2_sec * 1000.0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1117 #endif
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1118 } while (!_cm->has_aborted() && the_task->has_aborted());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1119 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1120 the_task->record_end_time();
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	1121 guarantee(!the_task->has_aborted() \|\| _cm->has_aborted(), "invariant");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1122
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1123 ConcurrentGCThread::stsLeave();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1124
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1125 double end_vtime = os::elapsedVTime();
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1126 _cm->update_accum_task_vtime(worker_id, end_vtime - start_vtime);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1127 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1128
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1129 CMConcurrentMarkingTask(ConcurrentMark* cm,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1130 ConcurrentMarkThread* cmt) :
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1131 AbstractGangTask("Concurrent Mark"), _cm(cm), _cmt(cmt) { }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1132
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1133 ~CMConcurrentMarkingTask() { }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1134 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1135
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1136 // Calculates the number of active workers for a concurrent
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1137 // phase.
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1138 uint ConcurrentMark::calc_parallel_marking_threads() {
4711 adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	1139 if (G1CollectedHeap::use_parallel_gc_threads()) {
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1140 uint n_conc_workers = 0;
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1141 if (!UseDynamicNumberOfGCThreads \|\|
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1142 (!FLAG_IS_DEFAULT(ConcGCThreads) &&
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1143 !ForceDynamicNumberOfGCThreads)) {
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1144 n_conc_workers = max_parallel_marking_threads();
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1145 } else {
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1146 n_conc_workers =
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1147 AdaptiveSizePolicy::calc_default_active_workers(
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1148 max_parallel_marking_threads(),
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1149 1, /* Minimum workers */
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1150 parallel_marking_threads(),
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1151 Threads::number_of_non_daemon_threads());
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1152 // Don't scale down "n_conc_workers" by scale_parallel_threads() because
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1153 // that scaling has already gone into "_max_parallel_marking_threads".
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1154 }
4711 adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	1155 assert(n_conc_workers > 0, "Always need at least 1");
adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	1156 return n_conc_workers;
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1157 }
4711 adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	1158 // If we are not running with any parallel GC threads we will not
adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	1159 // have spawned any marking threads either. Hence the number of
adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	1160 // concurrent workers should be 0.
adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	1161 return 0;
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1162 }
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1163
4837 eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1164 void ConcurrentMark::scanRootRegion(HeapRegion* hr, uint worker_id) {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1165 // Currently, only survivors can be root regions.
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1166 assert(hr->next_top_at_mark_start() == hr->bottom(), "invariant");
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1167 G1RootRegionScanClosure cl(_g1h, this, worker_id);
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1168
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1169 const uintx interval = PrefetchScanIntervalInBytes;
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1170 HeapWord* curr = hr->bottom();
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1171 const HeapWord* end = hr->top();
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1172 while (curr < end) {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1173 Prefetch::read(curr, interval);
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1174 oop obj = oop(curr);
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1175 int size = obj->oop_iterate(&cl);
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1176 assert(size == obj->size(), "sanity");
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1177 curr += size;
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1178 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1179 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1180
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1181 class CMRootRegionScanTask : public AbstractGangTask {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1182 private:
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1183 ConcurrentMark* _cm;
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1184
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1185 public:
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1186 CMRootRegionScanTask(ConcurrentMark* cm) :
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1187 AbstractGangTask("Root Region Scan"), _cm(cm) { }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1188
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1189 void work(uint worker_id) {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1190 assert(Thread::current()->is_ConcurrentGC_thread(),
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1191 "this should only be done by a conc GC thread");
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1192
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1193 CMRootRegions* root_regions = _cm->root_regions();
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1194 HeapRegion* hr = root_regions->claim_next();
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1195 while (hr != NULL) {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1196 _cm->scanRootRegion(hr, worker_id);
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1197 hr = root_regions->claim_next();
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1198 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1199 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1200 };
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1201
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1202 void ConcurrentMark::scanRootRegions() {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1203 // scan_in_progress() will have been set to true only if there was
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1204 // at least one root region to scan. So, if it's false, we
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1205 // should not attempt to do any further work.
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1206 if (root_regions()->scan_in_progress()) {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1207 _parallel_marking_threads = calc_parallel_marking_threads();
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1208 assert(parallel_marking_threads() <= max_parallel_marking_threads(),
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1209 "Maximum number of marking threads exceeded");
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1210 uint active_workers = MAX2(1U, parallel_marking_threads());
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1211
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1212 CMRootRegionScanTask task(this);
8008 256d3f43c177 8005875: G1: Kitchensink fails with ParallelGCThreads=0 johnc parents: 8006 diff changeset	1213 if (use_parallel_marking_threads()) {
4837 eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1214 _parallel_workers->set_active_workers((int) active_workers);
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1215 _parallel_workers->run_task(&task);
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1216 } else {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1217 task.work(0);
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1218 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1219
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1220 // It's possible that has_aborted() is true here without actually
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1221 // aborting the survivor scan earlier. This is OK as it's
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1222 // mainly used for sanity checking.
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1223 root_regions()->scan_finished();
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1224 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1225 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1226
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1227 void ConcurrentMark::markFromRoots() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1228 // we might be tempted to assert that:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1229 // assert(asynch == !SafepointSynchronize::is_at_safepoint(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1230 // "inconsistent argument?");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1231 // However that wouldn't be right, because it's possible that
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1232 // a safepoint is indeed in progress as a younger generation
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1233 // stop-the-world GC happens even as we mark in this generation.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1234
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1235 _restart_for_overflow = false;
3316 cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1236 force_overflow_conc()->init();
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1237
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1238 // _g1h has _n_par_threads
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1239 _parallel_marking_threads = calc_parallel_marking_threads();
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1240 assert(parallel_marking_threads() <= max_parallel_marking_threads(),
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1241 "Maximum number of marking threads exceeded");
4711 adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	1242
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1243 uint active_workers = MAX2(1U, parallel_marking_threads());
4711 adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	1244
8788 e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	1245 // Parallel task terminator is set in "set_concurrency_and_phase()"
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	1246 set_concurrency_and_phase(active_workers, true /* concurrent */);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1247
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1248 CMConcurrentMarkingTask markingTask(this, cmThread());
8008 256d3f43c177 8005875: G1: Kitchensink fails with ParallelGCThreads=0 johnc parents: 8006 diff changeset	1249 if (use_parallel_marking_threads()) {
4711 adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	1250 _parallel_workers->set_active_workers((int)active_workers);
adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	1251 // Don't set _n_par_threads because it affects MT in proceess_strong_roots()
adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	1252 // and the decisions on that MT processing is made elsewhere.
adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	1253 assert(_parallel_workers->active_workers() > 0, "Should have been set");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1254 _parallel_workers->run_task(&markingTask);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	1255 } else {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1256 markingTask.work(0);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	1257 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1258 print_stats();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1259 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1260
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1261 void ConcurrentMark::checkpointRootsFinal(bool clear_all_soft_refs) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1262 // world is stopped at this checkpoint
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1263 assert(SafepointSynchronize::is_at_safepoint(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1264 "world should be stopped");
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	1265
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1266 G1CollectedHeap* g1h = G1CollectedHeap::heap();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1267
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1268 // If a full collection has happened, we shouldn't do this.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1269 if (has_aborted()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1270 g1h->set_marking_complete(); // So bitmap clearing isn't confused
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1271 return;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1272 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1273
2125 7246a374a9f2 6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent kamg parents: 2037 diff changeset	1274 SvcGCMarker sgcm(SvcGCMarker::OTHER);
7246a374a9f2 6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent kamg parents: 2037 diff changeset	1275
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	1276 if (VerifyDuringGC) {
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	1277 HandleMark hm; // handle scope
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	1278 Universe::heap()->prepare_for_verify();
10186 b06ac540229e 8013132: Add a flag to turn off the output of the verbose verification code stefank parents: 9076 diff changeset	1279 Universe::verify(VerifyOption_G1UsePrevMarking,
b06ac540229e 8013132: Add a flag to turn off the output of the verbose verification code stefank parents: 9076 diff changeset	1280 " VerifyDuringGC:(before)");
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	1281 }
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	1282
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1283 G1CollectorPolicy* g1p = g1h->g1_policy();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1284 g1p->record_concurrent_mark_remark_start();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1285
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1286 double start = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1287
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1288 checkpointRootsFinalWork();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1289
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1290 double mark_work_end = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1291
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1292 weakRefsWork(clear_all_soft_refs);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1293
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1294 if (has_overflown()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1295 // Oops. We overflowed. Restart concurrent marking.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1296 _restart_for_overflow = true;
8789 1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure johnc parents: 8788 diff changeset	1297 if (G1TraceMarkStackOverflow) {
1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure johnc parents: 8788 diff changeset	1298 gclog_or_tty->print_cr("\nRemark led to restart for overflow.");
1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure johnc parents: 8788 diff changeset	1299 }
1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure johnc parents: 8788 diff changeset	1300
1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure johnc parents: 8788 diff changeset	1301 // Verify the heap w.r.t. the previous marking bitmap.
1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure johnc parents: 8788 diff changeset	1302 if (VerifyDuringGC) {
1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure johnc parents: 8788 diff changeset	1303 HandleMark hm; // handle scope
1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure johnc parents: 8788 diff changeset	1304 Universe::heap()->prepare_for_verify();
10186 b06ac540229e 8013132: Add a flag to turn off the output of the verbose verification code stefank parents: 9076 diff changeset	1305 Universe::verify(VerifyOption_G1UsePrevMarking,
b06ac540229e 8013132: Add a flag to turn off the output of the verbose verification code stefank parents: 9076 diff changeset	1306 " VerifyDuringGC:(overflow)");
8789 1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure johnc parents: 8788 diff changeset	1307 }
1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure johnc parents: 8788 diff changeset	1308
7450 d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	1309 // Clear the marking state because we will be restarting
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	1310 // marking due to overflowing the global mark stack.
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	1311 reset_marking_state();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1312 } else {
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1313 // Aggregate the per-task counting data that we have accumulated
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1314 // while marking.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1315 aggregate_count_data();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1316
2149 7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 2125 diff changeset	1317 SATBMarkQueueSet& satb_mq_set = JavaThread::satb_mark_queue_set();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1318 // We're done with marking.
1317 d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1314 diff changeset	1319 // This is the end of the marking cycle, we're expected all
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1314 diff changeset	1320 // threads to have SATB queues with active set to true.
2149 7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 2125 diff changeset	1321 satb_mq_set.set_active_all_threads(false, /* new active value */
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 2125 diff changeset	1322 true /* expected_active */);
811 830ca2573896 6850846: G1: extend G1 marking verification tonyp parents: 751 diff changeset	1323
830ca2573896 6850846: G1: extend G1 marking verification tonyp parents: 751 diff changeset	1324 if (VerifyDuringGC) {
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	1325 HandleMark hm; // handle scope
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	1326 Universe::heap()->prepare_for_verify();
10186 b06ac540229e 8013132: Add a flag to turn off the output of the verbose verification code stefank parents: 9076 diff changeset	1327 Universe::verify(VerifyOption_G1UseNextMarking,
b06ac540229e 8013132: Add a flag to turn off the output of the verbose verification code stefank parents: 9076 diff changeset	1328 " VerifyDuringGC:(after)");
811 830ca2573896 6850846: G1: extend G1 marking verification tonyp parents: 751 diff changeset	1329 }
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	1330 assert(!restart_for_overflow(), "sanity");
7450 d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	1331 // Completely reset the marking state since marking completed
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	1332 set_non_marking_state();
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	1333 }
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	1334
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	1335 // Expand the marking stack, if we have to and if we can.
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	1336 if (_markStack.should_expand()) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	1337 _markStack.expand();
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	1338 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	1339
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1340 // Statistics
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1341 double now = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1342 _remark_mark_times.add((mark_work_end - start) * 1000.0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1343 _remark_weak_ref_times.add((now - mark_work_end) * 1000.0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1344 _remark_times.add((now - start) * 1000.0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1345
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1346 g1p->record_concurrent_mark_remark_end();
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	1347
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	1348 G1CMIsAliveClosure is_alive(g1h);
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	1349 g1h->gc_tracer_cm()->report_object_count_after_gc(&is_alive);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1350 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1351
6027 8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1352 // Base class of the closures that finalize and verify the
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1353 // liveness counting data.
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1354 class CMCountDataClosureBase: public HeapRegionClosure {
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1355 protected:
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1356 G1CollectedHeap* _g1h;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1357 ConcurrentMark* _cm;
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1358 CardTableModRefBS* _ct_bs;
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1359
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1360 BitMap* _region_bm;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1361 BitMap* _card_bm;
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1362
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1363 // Takes a region that's not empty (i.e., it has at least one
829 30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1364 // live object in it and sets its corresponding bit on the region
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1365 // bitmap to 1. If the region is "starts humongous" it will also set
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1366 // to 1 the bits on the region bitmap that correspond to its
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1367 // associated "continues humongous" regions.
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1368 void set_bit_for_region(HeapRegion* hr) {
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1369 assert(!hr->continuesHumongous(), "should have filtered those out");
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1370
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	1371 BitMap::idx_t index = (BitMap::idx_t) hr->hrs_index();
829 30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1372 if (!hr->startsHumongous()) {
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1373 // Normal (non-humongous) case: just set the bit.
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	1374 _region_bm->par_at_put(index, true);
829 30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1375 } else {
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1376 // Starts humongous case: calculate how many regions are part of
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1377 // this humongous region and then set the bit range.
6254 a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1378 BitMap::idx_t end_index = (BitMap::idx_t) hr->last_hc_index();
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	1379 _region_bm->par_at_put_range(index, end_index, true);
829 30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1380 }
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1381 }
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1382
6027 8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1383 public:
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1384 CMCountDataClosureBase(G1CollectedHeap* g1h,
6027 8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1385 BitMap* region_bm, BitMap* card_bm):
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1386 _g1h(g1h), _cm(g1h->concurrent_mark()),
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1387 _ct_bs((CardTableModRefBS*) (g1h->barrier_set())),
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1388 _region_bm(region_bm), _card_bm(card_bm) { }
6027 8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1389 };
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1390
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1391 // Closure that calculates the # live objects per region. Used
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1392 // for verification purposes during the cleanup pause.
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1393 class CalcLiveObjectsClosure: public CMCountDataClosureBase {
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1394 CMBitMapRO* _bm;
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1395 size_t _region_marked_bytes;
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1396
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1397 public:
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1398 CalcLiveObjectsClosure(CMBitMapRO bm, G1CollectedHeap g1h,
6027 8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1399 BitMap* region_bm, BitMap* card_bm) :
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1400 CMCountDataClosureBase(g1h, region_bm, card_bm),
6027 8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1401 _bm(bm), _region_marked_bytes(0) { }
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1402
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1403 bool doHeapRegion(HeapRegion* hr) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1404
639 922c573ea67d 6815683: G1: SEGV during marking iveresov parents: 619 diff changeset	1405 if (hr->continuesHumongous()) {
829 30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1406 // We will ignore these here and process them when their
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1407 // associated "starts humongous" region is processed (see
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1408 // set_bit_for_heap_region()). Note that we cannot rely on their
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1409 // associated "starts humongous" region to have their bit set to
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1410 // 1 since, due to the region chunking in the parallel region
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1411 // iteration, a "continues humongous" region might be visited
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1412 // before its associated "starts humongous".
639 922c573ea67d 6815683: G1: SEGV during marking iveresov parents: 619 diff changeset	1413 return false;
922c573ea67d 6815683: G1: SEGV during marking iveresov parents: 619 diff changeset	1414 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1415
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1416 HeapWord* ntams = hr->next_top_at_mark_start();
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1417 HeapWord* start = hr->bottom();
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1418
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1419 assert(start <= hr->end() && start <= ntams && ntams <= hr->end(),
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1420 err_msg("Preconditions not met - "
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1421 "start: "PTR_FORMAT", ntams: "PTR_FORMAT", end: "PTR_FORMAT,
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1422 start, ntams, hr->end()));
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1423
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1424 // Find the first marked object at or after "start".
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1425 start = _bm->getNextMarkedWordAddress(start, ntams);
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1426
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1427 size_t marked_bytes = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1428
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1429 while (start < ntams) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1430 oop obj = oop(start);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1431 int obj_sz = obj->size();
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1432 HeapWord* obj_end = start + obj_sz;
6027 8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1433
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1434 BitMap::idx_t start_idx = _cm->card_bitmap_index_for(start);
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1435 BitMap::idx_t end_idx = _cm->card_bitmap_index_for(obj_end);
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1436
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1437 // Note: if we're looking at the last region in heap - obj_end
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1438 // could be actually just beyond the end of the heap; end_idx
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1439 // will then correspond to a (non-existent) card that is also
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1440 // just beyond the heap.
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1441 if (_g1h->is_in_g1_reserved(obj_end) && !_ct_bs->is_card_aligned(obj_end)) {
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1442 // end of object is not card aligned - increment to cover
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1443 // all the cards spanned by the object
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1444 end_idx += 1;
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1445 }
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1446
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1447 // Set the bits in the card BM for the cards spanned by this object.
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1448 _cm->set_card_bitmap_range(_card_bm, start_idx, end_idx, true /* is_par */);
6027 8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1449
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1450 // Add the size of this object to the number of marked bytes.
1030 dfdaf65c3423 6858886: G1: guarantee(_next_marked_bytes <= used(),"invariant") at heapRegion.hpp:359 apetrusenko parents: 1023 diff changeset	1451 marked_bytes += (size_t)obj_sz * HeapWordSize;
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1452
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1453 // Find the next marked object after this one.
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1454 start = _bm->getNextMarkedWordAddress(obj_end, ntams);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	1455 }
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1456
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1457 // Mark the allocated-since-marking portion...
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1458 HeapWord* top = hr->top();
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1459 if (ntams < top) {
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1460 BitMap::idx_t start_idx = _cm->card_bitmap_index_for(ntams);
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1461 BitMap::idx_t end_idx = _cm->card_bitmap_index_for(top);
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1462
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1463 // Note: if we're looking at the last region in heap - top
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1464 // could be actually just beyond the end of the heap; end_idx
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1465 // will then correspond to a (non-existent) card that is also
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1466 // just beyond the heap.
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1467 if (_g1h->is_in_g1_reserved(top) && !_ct_bs->is_card_aligned(top)) {
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1468 // end of object is not card aligned - increment to cover
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1469 // all the cards spanned by the object
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1470 end_idx += 1;
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1471 }
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1472 _cm->set_card_bitmap_range(_card_bm, start_idx, end_idx, true /* is_par */);
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1473
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1474 // This definitely means the region has live objects.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1475 set_bit_for_region(hr);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1476 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1477
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1478 // Update the live region bitmap.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1479 if (marked_bytes > 0) {
829 30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1480 set_bit_for_region(hr);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1481 }
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1482
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1483 // Set the marked bytes for the current region so that
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1484 // it can be queried by a calling verificiation routine
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1485 _region_marked_bytes = marked_bytes;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1486
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1487 return false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1488 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1489
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1490 size_t region_marked_bytes() const { return _region_marked_bytes; }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1491 };
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1492
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1493 // Heap region closure used for verifying the counting data
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1494 // that was accumulated concurrently and aggregated during
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1495 // the remark pause. This closure is applied to the heap
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1496 // regions during the STW cleanup pause.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1497
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1498 class VerifyLiveObjectDataHRClosure: public HeapRegionClosure {
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1499 G1CollectedHeap* _g1h;
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1500 ConcurrentMark* _cm;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1501 CalcLiveObjectsClosure _calc_cl;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1502 BitMap* _region_bm; // Region BM to be verified
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1503 BitMap* _card_bm; // Card BM to be verified
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1504 bool _verbose; // verbose output?
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1505
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1506 BitMap* _exp_region_bm; // Expected Region BM values
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1507 BitMap* _exp_card_bm; // Expected card BM values
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1508
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1509 int _failures;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1510
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1511 public:
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1512 VerifyLiveObjectDataHRClosure(G1CollectedHeap* g1h,
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1513 BitMap* region_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1514 BitMap* card_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1515 BitMap* exp_region_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1516 BitMap* exp_card_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1517 bool verbose) :
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1518 _g1h(g1h), _cm(g1h->concurrent_mark()),
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1519 _calc_cl(_cm->nextMarkBitMap(), g1h, exp_region_bm, exp_card_bm),
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1520 _region_bm(region_bm), _card_bm(card_bm), _verbose(verbose),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1521 _exp_region_bm(exp_region_bm), _exp_card_bm(exp_card_bm),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1522 _failures(0) { }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1523
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1524 int failures() const { return _failures; }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1525
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1526 bool doHeapRegion(HeapRegion* hr) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1527 if (hr->continuesHumongous()) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1528 // We will ignore these here and process them when their
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1529 // associated "starts humongous" region is processed (see
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1530 // set_bit_for_heap_region()). Note that we cannot rely on their
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1531 // associated "starts humongous" region to have their bit set to
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1532 // 1 since, due to the region chunking in the parallel region
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1533 // iteration, a "continues humongous" region might be visited
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1534 // before its associated "starts humongous".
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1535 return false;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1536 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1537
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1538 int failures = 0;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1539
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1540 // Call the CalcLiveObjectsClosure to walk the marking bitmap for
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1541 // this region and set the corresponding bits in the expected region
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1542 // and card bitmaps.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1543 bool res = _calc_cl.doHeapRegion(hr);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1544 assert(res == false, "should be continuing");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1545
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1546 MutexLockerEx x((_verbose ? ParGCRareEvent_lock : NULL),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1547 Mutex::_no_safepoint_check_flag);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1548
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1549 // Verify the marked bytes for this region.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1550 size_t exp_marked_bytes = _calc_cl.region_marked_bytes();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1551 size_t act_marked_bytes = hr->next_marked_bytes();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1552
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1553 // We're not OK if expected marked bytes > actual marked bytes. It means
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1554 // we have missed accounting some objects during the actual marking.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1555 if (exp_marked_bytes > act_marked_bytes) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1556 if (_verbose) {
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	1557 gclog_or_tty->print_cr("Region %u: marked bytes mismatch: "
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1558 "expected: " SIZE_FORMAT ", actual: " SIZE_FORMAT,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1559 hr->hrs_index(), exp_marked_bytes, act_marked_bytes);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1560 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1561 failures += 1;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1562 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1563
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1564 // Verify the bit, for this region, in the actual and expected
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1565 // (which was just calculated) region bit maps.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1566 // We're not OK if the bit in the calculated expected region
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1567 // bitmap is set and the bit in the actual region bitmap is not.
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	1568 BitMap::idx_t index = (BitMap::idx_t) hr->hrs_index();
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1569
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1570 bool expected = _exp_region_bm->at(index);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1571 bool actual = _region_bm->at(index);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1572 if (expected && !actual) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1573 if (_verbose) {
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	1574 gclog_or_tty->print_cr("Region %u: region bitmap mismatch: "
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	1575 "expected: %s, actual: %s",
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	1576 hr->hrs_index(),
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	1577 BOOL_TO_STR(expected), BOOL_TO_STR(actual));
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1578 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1579 failures += 1;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1580 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1581
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1582 // Verify that the card bit maps for the cards spanned by the current
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1583 // region match. We have an error if we have a set bit in the expected
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1584 // bit map and the corresponding bit in the actual bitmap is not set.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1585
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1586 BitMap::idx_t start_idx = _cm->card_bitmap_index_for(hr->bottom());
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1587 BitMap::idx_t end_idx = _cm->card_bitmap_index_for(hr->top());
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1588
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1589 for (BitMap::idx_t i = start_idx; i < end_idx; i+=1) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1590 expected = _exp_card_bm->at(i);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1591 actual = _card_bm->at(i);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1592
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1593 if (expected && !actual) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1594 if (_verbose) {
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	1595 gclog_or_tty->print_cr("Region %u: card bitmap mismatch at " SIZE_FORMAT ": "
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	1596 "expected: %s, actual: %s",
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	1597 hr->hrs_index(), i,
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	1598 BOOL_TO_STR(expected), BOOL_TO_STR(actual));
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1599 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1600 failures += 1;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1601 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1602 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1603
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1604 if (failures > 0 && _verbose) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1605 gclog_or_tty->print_cr("Region " HR_FORMAT ", ntams: " PTR_FORMAT ", "
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1606 "marked_bytes: calc/actual " SIZE_FORMAT "/" SIZE_FORMAT,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1607 HR_FORMAT_PARAMS(hr), hr->next_top_at_mark_start(),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1608 _calc_cl.region_marked_bytes(), hr->next_marked_bytes());
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1609 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1610
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1611 _failures += failures;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1612
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1613 // We could stop iteration over the heap when we
6027 8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1614 // find the first violating region by returning true.
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1615 return false;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1616 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1617 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1618
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1619
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1620 class G1ParVerifyFinalCountTask: public AbstractGangTask {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1621 protected:
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1622 G1CollectedHeap* _g1h;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1623 ConcurrentMark* _cm;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1624 BitMap* _actual_region_bm;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1625 BitMap* _actual_card_bm;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1626
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1627 uint _n_workers;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1628
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1629 BitMap* _expected_region_bm;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1630 BitMap* _expected_card_bm;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1631
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1632 int _failures;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1633 bool _verbose;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1634
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1635 public:
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1636 G1ParVerifyFinalCountTask(G1CollectedHeap* g1h,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1637 BitMap* region_bm, BitMap* card_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1638 BitMap* expected_region_bm, BitMap* expected_card_bm)
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1639 : AbstractGangTask("G1 verify final counting"),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1640 _g1h(g1h), _cm(_g1h->concurrent_mark()),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1641 _actual_region_bm(region_bm), _actual_card_bm(card_bm),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1642 _expected_region_bm(expected_region_bm), _expected_card_bm(expected_card_bm),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1643 _failures(0), _verbose(false),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1644 _n_workers(0) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1645 assert(VerifyDuringGC, "don't call this otherwise");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1646
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1647 // Use the value already set as the number of active threads
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1648 // in the call to run_task().
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1649 if (G1CollectedHeap::use_parallel_gc_threads()) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1650 assert( _g1h->workers()->active_workers() > 0,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1651 "Should have been previously set");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1652 _n_workers = _g1h->workers()->active_workers();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1653 } else {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1654 _n_workers = 1;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1655 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1656
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1657 assert(_expected_card_bm->size() == _actual_card_bm->size(), "sanity");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1658 assert(_expected_region_bm->size() == _actual_region_bm->size(), "sanity");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1659
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1660 _verbose = _cm->verbose_medium();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1661 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1662
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1663 void work(uint worker_id) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1664 assert(worker_id < _n_workers, "invariant");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1665
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1666 VerifyLiveObjectDataHRClosure verify_cl(_g1h,
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1667 _actual_region_bm, _actual_card_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1668 _expected_region_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1669 _expected_card_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1670 _verbose);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1671
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1672 if (G1CollectedHeap::use_parallel_gc_threads()) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1673 _g1h->heap_region_par_iterate_chunked(&verify_cl,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1674 worker_id,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1675 _n_workers,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1676 HeapRegion::VerifyCountClaimValue);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1677 } else {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1678 _g1h->heap_region_iterate(&verify_cl);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1679 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1680
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1681 Atomic::add(verify_cl.failures(), &_failures);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1682 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1683
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1684 int failures() const { return _failures; }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1685 };
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1686
6027 8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1687 // Closure that finalizes the liveness counting data.
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1688 // Used during the cleanup pause.
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1689 // Sets the bits corresponding to the interval [NTAMS, top]
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1690 // (which contains the implicitly live objects) in the
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1691 // card liveness bitmap. Also sets the bit for each region,
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1692 // containing live data, in the region liveness bitmap.
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1693
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1694 class FinalCountDataUpdateClosure: public CMCountDataClosureBase {
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1695 public:
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1696 FinalCountDataUpdateClosure(G1CollectedHeap* g1h,
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1697 BitMap* region_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1698 BitMap* card_bm) :
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1699 CMCountDataClosureBase(g1h, region_bm, card_bm) { }
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1700
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1701 bool doHeapRegion(HeapRegion* hr) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1702
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1703 if (hr->continuesHumongous()) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1704 // We will ignore these here and process them when their
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1705 // associated "starts humongous" region is processed (see
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1706 // set_bit_for_heap_region()). Note that we cannot rely on their
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1707 // associated "starts humongous" region to have their bit set to
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1708 // 1 since, due to the region chunking in the parallel region
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1709 // iteration, a "continues humongous" region might be visited
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1710 // before its associated "starts humongous".
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1711 return false;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1712 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1713
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1714 HeapWord* ntams = hr->next_top_at_mark_start();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1715 HeapWord* top = hr->top();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1716
6027 8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1717 assert(hr->bottom() <= ntams && ntams <= hr->end(), "Preconditions.");
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1718
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1719 // Mark the allocated-since-marking portion...
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1720 if (ntams < top) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1721 // This definitely means the region has live objects.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1722 set_bit_for_region(hr);
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1723
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1724 // Now set the bits in the card bitmap for [ntams, top)
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1725 BitMap::idx_t start_idx = _cm->card_bitmap_index_for(ntams);
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1726 BitMap::idx_t end_idx = _cm->card_bitmap_index_for(top);
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1727
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1728 // Note: if we're looking at the last region in heap - top
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1729 // could be actually just beyond the end of the heap; end_idx
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1730 // will then correspond to a (non-existent) card that is also
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1731 // just beyond the heap.
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1732 if (_g1h->is_in_g1_reserved(top) && !_ct_bs->is_card_aligned(top)) {
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1733 // end of object is not card aligned - increment to cover
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1734 // all the cards spanned by the object
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1735 end_idx += 1;
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1736 }
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1737
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1738 assert(end_idx <= _card_bm->size(),
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1739 err_msg("oob: end_idx= "SIZE_FORMAT", bitmap size= "SIZE_FORMAT,
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1740 end_idx, _card_bm->size()));
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1741 assert(start_idx < _card_bm->size(),
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1742 err_msg("oob: start_idx= "SIZE_FORMAT", bitmap size= "SIZE_FORMAT,
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1743 start_idx, _card_bm->size()));
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1744
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1745 _cm->set_card_bitmap_range(_card_bm, start_idx, end_idx, true /* is_par */);
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6254 diff changeset	1746 }
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1747
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1748 // Set the bit for the region if it contains live data
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1749 if (hr->next_marked_bytes() > 0) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1750 set_bit_for_region(hr);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1751 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1752
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1753 return false;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1754 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1755 };
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1756
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1757 class G1ParFinalCountTask: public AbstractGangTask {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1758 protected:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1759 G1CollectedHeap* _g1h;
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1760 ConcurrentMark* _cm;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1761 BitMap* _actual_region_bm;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1762 BitMap* _actual_card_bm;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1763
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1764 uint _n_workers;
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1765
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1766 public:
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1767 G1ParFinalCountTask(G1CollectedHeap* g1h, BitMap* region_bm, BitMap* card_bm)
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1768 : AbstractGangTask("G1 final counting"),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1769 _g1h(g1h), _cm(_g1h->concurrent_mark()),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1770 _actual_region_bm(region_bm), _actual_card_bm(card_bm),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1771 _n_workers(0) {
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1772 // Use the value already set as the number of active threads
6011 f7a8920427a6 7145441: G1: collection set chooser-related cleanup tonyp parents: 6010 diff changeset	1773 // in the call to run_task().
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1774 if (G1CollectedHeap::use_parallel_gc_threads()) {
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1775 assert( _g1h->workers()->active_workers() > 0,
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1776 "Should have been previously set");
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1777 _n_workers = _g1h->workers()->active_workers();
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	1778 } else {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1779 _n_workers = 1;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	1780 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1781 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1782
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1783 void work(uint worker_id) {
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1784 assert(worker_id < _n_workers, "invariant");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1785
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1786 FinalCountDataUpdateClosure final_update_cl(_g1h,
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1787 _actual_region_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1788 _actual_card_bm);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1789
1833 8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1719 diff changeset	1790 if (G1CollectedHeap::use_parallel_gc_threads()) {
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1791 _g1h->heap_region_par_iterate_chunked(&final_update_cl,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1792 worker_id,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1793 _n_workers,
355 0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 343 diff changeset	1794 HeapRegion::FinalCountClaimValue);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1795 } else {
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1796 _g1h->heap_region_iterate(&final_update_cl);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1797 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1798 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1799 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1800
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1801 class G1ParNoteEndTask;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1802
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1803 class G1NoteEndOfConcMarkClosure : public HeapRegionClosure {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1804 G1CollectedHeap* _g1;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1805 int _worker_num;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1806 size_t _max_live_bytes;
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	1807 uint _regions_claimed;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1808 size_t _freed_bytes;
2173 97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1809 FreeRegionList* _local_cleanup_list;
4072 8aae2050e83e 7092309: G1: introduce old region set tonyp parents: 4013 diff changeset	1810 OldRegionSet* _old_proxy_set;
2173 97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1811 HumongousRegionSet* _humongous_proxy_set;
97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1812 HRRSCleanupTask* _hrrs_cleanup_task;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1813 double _claimed_region_time;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1814 double _max_region_time;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1815
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1816 public:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1817 G1NoteEndOfConcMarkClosure(G1CollectedHeap* g1,
2173 97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1818 int worker_num,
97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1819 FreeRegionList* local_cleanup_list,
4072 8aae2050e83e 7092309: G1: introduce old region set tonyp parents: 4013 diff changeset	1820 OldRegionSet* old_proxy_set,
2173 97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1821 HumongousRegionSet* humongous_proxy_set,
4093 6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	1822 HRRSCleanupTask* hrrs_cleanup_task) :
6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	1823 _g1(g1), _worker_num(worker_num),
6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	1824 _max_live_bytes(0), _regions_claimed(0),
6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	1825 _freed_bytes(0),
6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	1826 _claimed_region_time(0.0), _max_region_time(0.0),
6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	1827 _local_cleanup_list(local_cleanup_list),
6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	1828 _old_proxy_set(old_proxy_set),
6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	1829 _humongous_proxy_set(humongous_proxy_set),
6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	1830 _hrrs_cleanup_task(hrrs_cleanup_task) { }
6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	1831
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1832 size_t freed_bytes() { return _freed_bytes; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1833
4093 6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	1834 bool doHeapRegion(HeapRegion *hr) {
6254 a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1835 if (hr->continuesHumongous()) {
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1836 return false;
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1837 }
4093 6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	1838 // We use a claim value of zero here because all regions
6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	1839 // were claimed with value 1 in the FinalCount task.
6254 a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1840 _g1->reset_gc_time_stamps(hr);
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1841 double start = os::elapsedTime();
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1842 _regions_claimed++;
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1843 hr->note_end_of_marking();
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1844 _max_live_bytes += hr->max_live_bytes();
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1845 _g1->free_region_if_empty(hr,
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1846 &_freed_bytes,
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1847 _local_cleanup_list,
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1848 _old_proxy_set,
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1849 _humongous_proxy_set,
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1850 _hrrs_cleanup_task,
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1851 true /* par */);
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1852 double region_time = (os::elapsedTime() - start);
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1853 _claimed_region_time += region_time;
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1854 if (region_time > _max_region_time) {
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1855 _max_region_time = region_time;
4093 6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	1856 }
6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	1857 return false;
6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	1858 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1859
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1860 size_t max_live_bytes() { return _max_live_bytes; }
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	1861 uint regions_claimed() { return _regions_claimed; }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1862 double claimed_region_time_sec() { return _claimed_region_time; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1863 double max_region_time_sec() { return _max_region_time; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1864 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1865
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1866 class G1ParNoteEndTask: public AbstractGangTask {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1867 friend class G1NoteEndOfConcMarkClosure;
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	1868
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1869 protected:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1870 G1CollectedHeap* _g1h;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1871 size_t _max_live_bytes;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1872 size_t _freed_bytes;
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	1873 FreeRegionList* _cleanup_list;
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	1874
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1875 public:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1876 G1ParNoteEndTask(G1CollectedHeap* g1h,
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	1877 FreeRegionList* cleanup_list) :
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1878 AbstractGangTask("G1 note end"), _g1h(g1h),
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	1879 _max_live_bytes(0), _freed_bytes(0), _cleanup_list(cleanup_list) { }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1880
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1881 void work(uint worker_id) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1882 double start = os::elapsedTime();
2173 97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1883 FreeRegionList local_cleanup_list("Local Cleanup List");
4072 8aae2050e83e 7092309: G1: introduce old region set tonyp parents: 4013 diff changeset	1884 OldRegionSet old_proxy_set("Local Cleanup Old Proxy Set");
2173 97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1885 HumongousRegionSet humongous_proxy_set("Local Cleanup Humongous Proxy Set");
97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1886 HRRSCleanupTask hrrs_cleanup_task;
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1887 G1NoteEndOfConcMarkClosure g1_note_end(_g1h, worker_id, &local_cleanup_list,
4072 8aae2050e83e 7092309: G1: introduce old region set tonyp parents: 4013 diff changeset	1888 &old_proxy_set,
2173 97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1889 &humongous_proxy_set,
97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1890 &hrrs_cleanup_task);
1833 8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1719 diff changeset	1891 if (G1CollectedHeap::use_parallel_gc_threads()) {
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1892 _g1h->heap_region_par_iterate_chunked(&g1_note_end, worker_id,
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1893 _g1h->workers()->active_workers(),
355 0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 343 diff changeset	1894 HeapRegion::NoteEndClaimValue);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1895 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1896 _g1h->heap_region_iterate(&g1_note_end);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1897 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1898 assert(g1_note_end.complete(), "Shouldn't have yielded!");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1899
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	1900 // Now update the lists
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	1901 _g1h->update_sets_after_freeing_regions(g1_note_end.freed_bytes(),
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	1902 NULL /* free_list */,
4072 8aae2050e83e 7092309: G1: introduce old region set tonyp parents: 4013 diff changeset	1903 &old_proxy_set,
2173 97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1904 &humongous_proxy_set,
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	1905 true /* par */);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1906 {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1907 MutexLockerEx x(ParGCRareEvent_lock, Mutex::_no_safepoint_check_flag);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1908 _max_live_bytes += g1_note_end.max_live_bytes();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1909 _freed_bytes += g1_note_end.freed_bytes();
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	1910
3778 5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3776 diff changeset	1911 // If we iterate over the global cleanup list at the end of
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3776 diff changeset	1912 // cleanup to do this printing we will not guarantee to only
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3776 diff changeset	1913 // generate output for the newly-reclaimed regions (the list
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3776 diff changeset	1914 // might not be empty at the beginning of cleanup; we might
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3776 diff changeset	1915 // still be working on its previous contents). So we do the
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3776 diff changeset	1916 // printing here, before we append the new regions to the global
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3776 diff changeset	1917 // cleanup list.
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3776 diff changeset	1918
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3776 diff changeset	1919 G1HRPrinter* hr_printer = _g1h->hr_printer();
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3776 diff changeset	1920 if (hr_printer->is_active()) {
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3776 diff changeset	1921 HeapRegionLinkedListIterator iter(&local_cleanup_list);
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3776 diff changeset	1922 while (iter.more_available()) {
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3776 diff changeset	1923 HeapRegion* hr = iter.get_next();
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3776 diff changeset	1924 hr_printer->cleanup(hr);
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3776 diff changeset	1925 }
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3776 diff changeset	1926 }
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3776 diff changeset	1927
2173 97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1928 _cleanup_list->add_as_tail(&local_cleanup_list);
97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1929 assert(local_cleanup_list.is_empty(), "post-condition");
97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1930
97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1931 HeapRegionRemSet::finish_cleanup_task(&hrrs_cleanup_task);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1932 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1933 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1934 size_t max_live_bytes() { return _max_live_bytes; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1935 size_t freed_bytes() { return _freed_bytes; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1936 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1937
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1938 class G1ParScrubRemSetTask: public AbstractGangTask {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1939 protected:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1940 G1RemSet* _g1rs;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1941 BitMap* _region_bm;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1942 BitMap* _card_bm;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1943 public:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1944 G1ParScrubRemSetTask(G1CollectedHeap* g1h,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1945 BitMap* region_bm, BitMap* card_bm) :
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1946 AbstractGangTask("G1 ScrubRS"), _g1rs(g1h->g1_rem_set()),
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1947 _region_bm(region_bm), _card_bm(card_bm) { }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1948
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1949 void work(uint worker_id) {
1833 8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1719 diff changeset	1950 if (G1CollectedHeap::use_parallel_gc_threads()) {
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1951 _g1rs->scrub_par(_region_bm, _card_bm, worker_id,
355 0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 343 diff changeset	1952 HeapRegion::ScrubRemSetClaimValue);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1953 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1954 _g1rs->scrub(_region_bm, _card_bm);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1955 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1956 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1957
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1958 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1959
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1960 void ConcurrentMark::cleanup() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1961 // world is stopped at this checkpoint
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1962 assert(SafepointSynchronize::is_at_safepoint(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1963 "world should be stopped");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1964 G1CollectedHeap* g1h = G1CollectedHeap::heap();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1965
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1966 // If a full collection has happened, we shouldn't do this.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1967 if (has_aborted()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1968 g1h->set_marking_complete(); // So bitmap clearing isn't confused
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1969 return;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1970 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1971
4072 8aae2050e83e 7092309: G1: introduce old region set tonyp parents: 4013 diff changeset	1972 HRSPhaseSetter x(HRSPhaseCleanup);
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	1973 g1h->verify_region_sets_optional();
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	1974
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	1975 if (VerifyDuringGC) {
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	1976 HandleMark hm; // handle scope
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	1977 Universe::heap()->prepare_for_verify();
10186 b06ac540229e 8013132: Add a flag to turn off the output of the verbose verification code stefank parents: 9076 diff changeset	1978 Universe::verify(VerifyOption_G1UsePrevMarking,
b06ac540229e 8013132: Add a flag to turn off the output of the verbose verification code stefank parents: 9076 diff changeset	1979 " VerifyDuringGC:(before)");
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	1980 }
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	1981
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1982 G1CollectorPolicy* g1p = G1CollectedHeap::heap()->g1_policy();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1983 g1p->record_concurrent_mark_cleanup_start();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1984
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1985 double start = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1986
2173 97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1987 HeapRegionRemSet::reset_for_cleanup_tasks();
97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1988
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1989 uint n_workers;
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1990
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1991 // Do counting once more with the world stopped for good measure.
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1992 G1ParFinalCountTask g1_par_count_task(g1h, &_region_bm, &_card_bm);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1993
1833 8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1719 diff changeset	1994 if (G1CollectedHeap::use_parallel_gc_threads()) {
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1995 assert(g1h->check_heap_region_claim_values(HeapRegion::InitialClaimValue),
355 0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 343 diff changeset	1996 "sanity check");
0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 343 diff changeset	1997
4711 adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	1998 g1h->set_par_threads();
adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	1999 n_workers = g1h->n_par_threads();
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	2000 assert(g1h->n_par_threads() == n_workers,
4711 adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	2001 "Should not have been reset");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2002 g1h->workers()->run_task(&g1_par_count_task);
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2003 // Done with the parallel phase so reset to 0.
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2004 g1h->set_par_threads(0);
355 0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 343 diff changeset	2005
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2006 assert(g1h->check_heap_region_claim_values(HeapRegion::FinalCountClaimValue),
355 0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 343 diff changeset	2007 "sanity check");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2008 } else {
4711 adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	2009 n_workers = 1;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2010 g1_par_count_task.work(0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2011 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2012
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2013 if (VerifyDuringGC) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2014 // Verify that the counting data accumulated during marking matches
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2015 // that calculated by walking the marking bitmap.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2016
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2017 // Bitmaps to hold expected values
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2018 BitMap expected_region_bm(_region_bm.size(), false);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2019 BitMap expected_card_bm(_card_bm.size(), false);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2020
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2021 G1ParVerifyFinalCountTask g1_par_verify_task(g1h,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2022 &_region_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2023 &_card_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2024 &expected_region_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2025 &expected_card_bm);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2026
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2027 if (G1CollectedHeap::use_parallel_gc_threads()) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2028 g1h->set_par_threads((int)n_workers);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2029 g1h->workers()->run_task(&g1_par_verify_task);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2030 // Done with the parallel phase so reset to 0.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2031 g1h->set_par_threads(0);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2032
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2033 assert(g1h->check_heap_region_claim_values(HeapRegion::VerifyCountClaimValue),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2034 "sanity check");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2035 } else {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2036 g1_par_verify_task.work(0);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2037 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2038
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2039 guarantee(g1_par_verify_task.failures() == 0, "Unexpected accounting failures");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2040 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2041
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2042 size_t start_used_bytes = g1h->used();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2043 g1h->set_marking_complete();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2044
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2045 double count_end = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2046 double this_final_counting_time = (count_end - start);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2047 _total_counting_time += this_final_counting_time;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2048
2435 371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	2049 if (G1PrintRegionLivenessInfo) {
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	2050 G1PrintRegionLivenessInfoClosure cl(gclog_or_tty, "Post-Marking");
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	2051 _g1h->heap_region_iterate(&cl);
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	2052 }
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	2053
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2054 // Install newly created mark bitMap as "prev".
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2055 swapMarkBitMaps();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2056
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2057 g1h->reset_gc_time_stamp();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2058
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2059 // Note end of marking in all heap regions.
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2060 G1ParNoteEndTask g1_par_note_end_task(g1h, &_cleanup_list);
1833 8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1719 diff changeset	2061 if (G1CollectedHeap::use_parallel_gc_threads()) {
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2062 g1h->set_par_threads((int)n_workers);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2063 g1h->workers()->run_task(&g1_par_note_end_task);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2064 g1h->set_par_threads(0);
355 0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 343 diff changeset	2065
0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 343 diff changeset	2066 assert(g1h->check_heap_region_claim_values(HeapRegion::NoteEndClaimValue),
0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 343 diff changeset	2067 "sanity check");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2068 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2069 g1_par_note_end_task.work(0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2070 }
6254 a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	2071 g1h->check_gc_time_stamps();
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2072
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2073 if (!cleanup_list_is_empty()) {
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2074 // The cleanup list is not empty, so we'll have to process it
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2075 // concurrently. Notify anyone else that might be wanting free
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2076 // regions that there will be more free regions coming soon.
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2077 g1h->set_free_regions_coming();
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2078 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2079
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2080 // call below, since it affects the metric by which we sort the heap
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2081 // regions.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2082 if (G1ScrubRemSets) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2083 double rs_scrub_start = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2084 G1ParScrubRemSetTask g1_par_scrub_rs_task(g1h, &_region_bm, &_card_bm);
1833 8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1719 diff changeset	2085 if (G1CollectedHeap::use_parallel_gc_threads()) {
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2086 g1h->set_par_threads((int)n_workers);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2087 g1h->workers()->run_task(&g1_par_scrub_rs_task);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2088 g1h->set_par_threads(0);
355 0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 343 diff changeset	2089
0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 343 diff changeset	2090 assert(g1h->check_heap_region_claim_values(
0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 343 diff changeset	2091 HeapRegion::ScrubRemSetClaimValue),
0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 343 diff changeset	2092 "sanity check");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2093 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2094 g1_par_scrub_rs_task.work(0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2095 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2096
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2097 double rs_scrub_end = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2098 double this_rs_scrub_time = (rs_scrub_end - rs_scrub_start);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2099 _total_rs_scrub_time += this_rs_scrub_time;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2100 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2101
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2102 // this will also free any regions totally full of garbage objects,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2103 // and sort the regions.
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2104 g1h->g1_policy()->record_concurrent_mark_cleanup_end((int)n_workers);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2105
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2106 // Statistics.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2107 double end = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2108 _cleanup_times.add((end - start) * 1000.0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2109
6007 5c86f8211d1e 7160728: Introduce an extra logging level for G1 logging brutisso parents: 5988 diff changeset	2110 if (G1Log::fine()) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2111 g1h->print_size_transition(gclog_or_tty,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2112 start_used_bytes,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2113 g1h->used(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2114 g1h->capacity());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2115 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2116
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2117 // Clean up will have freed any regions completely full of garbage.
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2118 // Update the soft reference policy with the new heap occupancy.
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2119 Universe::update_heap_info_at_gc();
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2120
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2121 // We need to make this be a "collection" so any collection pause that
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2122 // races with it goes around and waits for completeCleanup to finish.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2123 g1h->increment_total_collections();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2124
4830 0b3d1ec6eaee 7097586: G1: improve the per-space output when using jmap -heap tonyp parents: 4828 diff changeset	2125 // We reclaimed old regions so we should calculate the sizes to make
0b3d1ec6eaee 7097586: G1: improve the per-space output when using jmap -heap tonyp parents: 4828 diff changeset	2126 // sure we update the old gen/space data.
0b3d1ec6eaee 7097586: G1: improve the per-space output when using jmap -heap tonyp parents: 4828 diff changeset	2127 g1h->g1mm()->update_sizes();
0b3d1ec6eaee 7097586: G1: improve the per-space output when using jmap -heap tonyp parents: 4828 diff changeset	2128
751 20c6f43950b5 6490395: G1: Tidy up command line flags. johnc parents: 647 diff changeset	2129 if (VerifyDuringGC) {
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	2130 HandleMark hm; // handle scope
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	2131 Universe::heap()->prepare_for_verify();
10186 b06ac540229e 8013132: Add a flag to turn off the output of the verbose verification code stefank parents: 9076 diff changeset	2132 Universe::verify(VerifyOption_G1UsePrevMarking,
b06ac540229e 8013132: Add a flag to turn off the output of the verbose verification code stefank parents: 9076 diff changeset	2133 " VerifyDuringGC:(after)");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2134 }
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2135
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2136 g1h->verify_region_sets_optional();
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	2137 g1h->trace_heap_after_concurrent_cycle();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2138 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2139
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2140 void ConcurrentMark::completeCleanup() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2141 if (has_aborted()) return;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2142
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2143 G1CollectedHeap* g1h = G1CollectedHeap::heap();
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2144
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2145 _cleanup_list.verify_optional();
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2177 diff changeset	2146 FreeRegionList tmp_free_list("Tmp Free List");
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2147
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2148 if (G1ConcRegionFreeingVerbose) {
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2149 gclog_or_tty->print_cr("G1ConcRegionFreeing [complete cleanup] : "
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	2150 "cleanup list has %u entries",
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2151 _cleanup_list.length());
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2152 }
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2153
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2154 // Noone else should be accessing the _cleanup_list at this point,
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2155 // so it's not necessary to take any locks
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2156 while (!_cleanup_list.is_empty()) {
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2157 HeapRegion* hr = _cleanup_list.remove_head();
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2158 assert(hr != NULL, "the list was not empty");
3317 063382f9b575 7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...) tonyp parents: 3316 diff changeset	2159 hr->par_clear();
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2177 diff changeset	2160 tmp_free_list.add_as_tail(hr);
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2161
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2162 // Instead of adding one region at a time to the secondary_free_list,
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2163 // we accumulate them in the local list and move them a few at a
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2164 // time. This also cuts down on the number of notify_all() calls
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2165 // we do during this process. We'll also append the local list when
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2166 // _cleanup_list is empty (which means we just removed the last
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2167 // region from the _cleanup_list).
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2177 diff changeset	2168 if ((tmp_free_list.length() % G1SecondaryFreeListAppendLength == 0) \|\|
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2169 _cleanup_list.is_empty()) {
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2170 if (G1ConcRegionFreeingVerbose) {
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2171 gclog_or_tty->print_cr("G1ConcRegionFreeing [complete cleanup] : "
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	2172 "appending %u entries to the secondary_free_list, "
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	2173 "cleanup list still has %u entries",
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2177 diff changeset	2174 tmp_free_list.length(),
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2175 _cleanup_list.length());
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2176 }
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2177
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2178 {
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2179 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag);
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2177 diff changeset	2180 g1h->secondary_free_list_add_as_tail(&tmp_free_list);
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2181 SecondaryFreeList_lock->notify_all();
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2182 }
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2183
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2184 if (G1StressConcRegionFreeing) {
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2185 for (uintx i = 0; i < G1StressConcRegionFreeingDelayMillis; ++i) {
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2186 os::sleep(Thread::current(), (jlong) 1, false);
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2187 }
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2188 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2189 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2190 }
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2177 diff changeset	2191 assert(tmp_free_list.is_empty(), "post-condition");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2192 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2193
8014 f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2194 // Supporting Object and Oop closures for reference discovery
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2195 // and processing in during marking
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2196
2037 b03260081e9b 7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field johnc parents: 1974 diff changeset	2197 bool G1CMIsAliveClosure::do_object_b(oop obj) {
b03260081e9b 7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field johnc parents: 1974 diff changeset	2198 HeapWord* addr = (HeapWord*)obj;
b03260081e9b 7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field johnc parents: 1974 diff changeset	2199 return addr != NULL &&
b03260081e9b 7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field johnc parents: 1974 diff changeset	2200 (!_g1->is_in_g1_reserved(addr) \|\| !_g1->is_obj_ill(obj));
b03260081e9b 7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field johnc parents: 1974 diff changeset	2201 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2202
8014 f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2203 // 'Keep Alive' oop closure used by both serial parallel reference processing.
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2204 // Uses the CMTask associated with a worker thread (for serial reference
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2205 // processing the CMTask for worker 0 is used) to preserve (mark) and
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2206 // trace referent objects.
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2207 //
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2208 // Using the CMTask and embedded local queues avoids having the worker
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2209 // threads operating on the global mark stack. This reduces the risk
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2210 // of overflowing the stack - which we would rather avoid at this late
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2211 // state. Also using the tasks' local queues removes the potential
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2212 // of the workers interfering with each other that could occur if
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2213 // operating on the global stack.
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2214
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2215 class G1CMKeepAliveAndDrainClosure: public OopClosure {
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2216 ConcurrentMark* _cm;
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2217 CMTask* _task;
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2218 int _ref_counter_limit;
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2219 int _ref_counter;
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2220 bool _is_serial;
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2221 public:
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2222 G1CMKeepAliveAndDrainClosure(ConcurrentMark* cm, CMTask* task, bool is_serial) :
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2223 _cm(cm), _task(task), _is_serial(is_serial),
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2224 _ref_counter_limit(G1RefProcDrainInterval) {
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2225 assert(_ref_counter_limit > 0, "sanity");
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2226 assert(!_is_serial \|\| _task->worker_id() == 0, "only task 0 for serial code");
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2227 _ref_counter = _ref_counter_limit;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2228 }
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2229
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2230 virtual void do_oop(narrowOop* p) { do_oop_work(p); }
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2231 virtual void do_oop( oop* p) { do_oop_work(p); }
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2232
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2233 template <class T> void do_oop_work(T* p) {
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2234 if (!_cm->has_overflown()) {
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2235 oop obj = oopDesc::load_decode_heap_oop(p);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	2236 if (_cm->verbose_high()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	2237 gclog_or_tty->print_cr("\t[%u] we're looking at location "
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2238 "*"PTR_FORMAT" = "PTR_FORMAT,
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	2239 _task->worker_id(), p, (void*) obj);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	2240 }
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2241
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2242 _task->deal_with_reference(obj);
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2243 _ref_counter--;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2244
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2245 if (_ref_counter == 0) {
8014 f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2246 // We have dealt with _ref_counter_limit references, pushing them
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2247 // and objects reachable from them on to the local stack (and
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2248 // possibly the global stack). Call CMTask::do_marking_step() to
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2249 // process these entries.
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2250 //
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2251 // We call CMTask::do_marking_step() in a loop, which we'll exit if
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2252 // there's nothing more to do (i.e. we're done with the entries that
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2253 // were pushed as a result of the CMTask::deal_with_reference() calls
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2254 // above) or we overflow.
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2255 //
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2256 // Note: CMTask::do_marking_step() can set the CMTask::has_aborted()
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2257 // flag while there may still be some work to do. (See the comment at
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2258 // the beginning of CMTask::do_marking_step() for those conditions -
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2259 // one of which is reaching the specified time target.) It is only
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2260 // when CMTask::do_marking_step() returns without setting the
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2261 // has_aborted() flag that the marking step has completed.
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2262 do {
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2263 double mark_step_duration_ms = G1ConcMarkStepDurationMillis;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2264 _task->do_marking_step(mark_step_duration_ms,
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2265 false /* do_termination */,
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2266 _is_serial);
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2267 } while (_task->has_aborted() && !_cm->has_overflown());
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2268 _ref_counter = _ref_counter_limit;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2269 }
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2270 } else {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	2271 if (_cm->verbose_high()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	2272 gclog_or_tty->print_cr("\t[%u] CM Overflow", _task->worker_id());
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	2273 }
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2274 }
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2275 }
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2276 };
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2277
8014 f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2278 // 'Drain' oop closure used by both serial and parallel reference processing.
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2279 // Uses the CMTask associated with a given worker thread (for serial
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2280 // reference processing the CMtask for worker 0 is used). Calls the
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2281 // do_marking_step routine, with an unbelievably large timeout value,
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2282 // to drain the marking data structures of the remaining entries
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2283 // added by the 'keep alive' oop closure above.
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2284
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2285 class G1CMDrainMarkingStackClosure: public VoidClosure {
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2286 ConcurrentMark* _cm;
8014 f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2287 CMTask* _task;
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2288 bool _is_serial;
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2289 public:
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2290 G1CMDrainMarkingStackClosure(ConcurrentMark* cm, CMTask* task, bool is_serial) :
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2291 _cm(cm), _task(task), _is_serial(is_serial) {
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2292 assert(!_is_serial \|\| _task->worker_id() == 0, "only task 0 for serial code");
8014 f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2293 }
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2294
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2295 void do_void() {
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2296 do {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	2297 if (_cm->verbose_high()) {
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2298 gclog_or_tty->print_cr("\t[%u] Drain: Calling do_marking_step - serial: %s",
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2299 _task->worker_id(), BOOL_TO_STR(_is_serial));
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	2300 }
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2301
8014 f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2302 // We call CMTask::do_marking_step() to completely drain the local
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2303 // and global marking stacks of entries pushed by the 'keep alive'
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2304 // oop closure (an instance of G1CMKeepAliveAndDrainClosure above).
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2305 //
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2306 // CMTask::do_marking_step() is called in a loop, which we'll exit
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2307 // if there's nothing more to do (i.e. we'completely drained the
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2308 // entries that were pushed as a a result of applying the 'keep alive'
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2309 // closure to the entries on the discovered ref lists) or we overflow
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2310 // the global marking stack.
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2311 //
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2312 // Note: CMTask::do_marking_step() can set the CMTask::has_aborted()
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2313 // flag while there may still be some work to do. (See the comment at
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2314 // the beginning of CMTask::do_marking_step() for those conditions -
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2315 // one of which is reaching the specified time target.) It is only
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2316 // when CMTask::do_marking_step() returns without setting the
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2317 // has_aborted() flag that the marking step has completed.
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2318
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2319 _task->do_marking_step(1000000000.0 /* something very large */,
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2320 true /* do_termination */,
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2321 _is_serial);
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2322 } while (_task->has_aborted() && !_cm->has_overflown());
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2323 }
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2324 };
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2325
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2326 // Implementation of AbstractRefProcTaskExecutor for parallel
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2327 // reference processing at the end of G1 concurrent marking
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2328
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2329 class G1CMRefProcTaskExecutor: public AbstractRefProcTaskExecutor {
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2330 private:
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2331 G1CollectedHeap* _g1h;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2332 ConcurrentMark* _cm;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2333 WorkGang* _workers;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2334 int _active_workers;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2335
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2336 public:
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2337 G1CMRefProcTaskExecutor(G1CollectedHeap* g1h,
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2338 ConcurrentMark* cm,
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2339 WorkGang* workers,
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2340 int n_workers) :
4093 6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	2341 _g1h(g1h), _cm(cm),
6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	2342 _workers(workers), _active_workers(n_workers) { }
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2343
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2344 // Executes the given task using concurrent marking worker threads.
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2345 virtual void execute(ProcessTask& task);
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2346 virtual void execute(EnqueueTask& task);
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2347 };
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2348
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2349 class G1CMRefProcTaskProxy: public AbstractGangTask {
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2350 typedef AbstractRefProcTaskExecutor::ProcessTask ProcessTask;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2351 ProcessTask& _proc_task;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2352 G1CollectedHeap* _g1h;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2353 ConcurrentMark* _cm;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2354
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2355 public:
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2356 G1CMRefProcTaskProxy(ProcessTask& proc_task,
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2357 G1CollectedHeap* g1h,
4093 6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	2358 ConcurrentMark* cm) :
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2359 AbstractGangTask("Process reference objects in parallel"),
8014 f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2360 _proc_task(proc_task), _g1h(g1h), _cm(cm) {
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2361 ReferenceProcessor* rp = _g1h->ref_processor_cm();
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2362 assert(rp->processing_is_mt(), "shouldn't be here otherwise");
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2363 }
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2364
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	2365 virtual void work(uint worker_id) {
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2366 CMTask* task = _cm->task(worker_id);
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2367 G1CMIsAliveClosure g1_is_alive(_g1h);
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2368 G1CMKeepAliveAndDrainClosure g1_par_keep_alive(_cm, task, false /* is_serial */);
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2369 G1CMDrainMarkingStackClosure g1_par_drain(_cm, task, false /* is_serial */);
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2370
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	2371 _proc_task.work(worker_id, g1_is_alive, g1_par_keep_alive, g1_par_drain);
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2372 }
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2373 };
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2374
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2375 void G1CMRefProcTaskExecutor::execute(ProcessTask& proc_task) {
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2376 assert(_workers != NULL, "Need parallel worker threads.");
8014 f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2377 assert(_g1h->ref_processor_cm()->processing_is_mt(), "processing is not MT");
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2378
4093 6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	2379 G1CMRefProcTaskProxy proc_task_proxy(proc_task, _g1h, _cm);
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2380
8788 e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2381 // We need to reset the concurrency level before each
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2382 // proxy task execution, so that the termination protocol
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2383 // and overflow handling in CMTask::do_marking_step() knows
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2384 // how many workers to wait for.
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2385 _cm->set_concurrency(_active_workers);
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2386 _g1h->set_par_threads(_active_workers);
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2387 _workers->run_task(&proc_task_proxy);
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2388 _g1h->set_par_threads(0);
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2389 }
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2390
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2391 class G1CMRefEnqueueTaskProxy: public AbstractGangTask {
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2392 typedef AbstractRefProcTaskExecutor::EnqueueTask EnqueueTask;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2393 EnqueueTask& _enq_task;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2394
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2395 public:
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2396 G1CMRefEnqueueTaskProxy(EnqueueTask& enq_task) :
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2397 AbstractGangTask("Enqueue reference objects in parallel"),
4093 6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	2398 _enq_task(enq_task) { }
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2399
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	2400 virtual void work(uint worker_id) {
441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	2401 _enq_task.work(worker_id);
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2402 }
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2403 };
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2404
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2405 void G1CMRefProcTaskExecutor::execute(EnqueueTask& enq_task) {
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2406 assert(_workers != NULL, "Need parallel worker threads.");
8014 f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2407 assert(_g1h->ref_processor_cm()->processing_is_mt(), "processing is not MT");
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2408
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2409 G1CMRefEnqueueTaskProxy enq_task_proxy(enq_task);
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2410
8788 e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2411 // Not strictly necessary but...
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2412 //
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2413 // We need to reset the concurrency level before each
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2414 // proxy task execution, so that the termination protocol
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2415 // and overflow handling in CMTask::do_marking_step() knows
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2416 // how many workers to wait for.
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2417 _cm->set_concurrency(_active_workers);
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2418 _g1h->set_par_threads(_active_workers);
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2419 _workers->run_task(&enq_task_proxy);
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2420 _g1h->set_par_threads(0);
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2421 }
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2422
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2423 void ConcurrentMark::weakRefsWork(bool clear_all_soft_refs) {
8788 e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2424 if (has_overflown()) {
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2425 // Skip processing the discovered references if we have
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2426 // overflown the global marking stack. Reference objects
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2427 // only get discovered once so it is OK to not
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2428 // de-populate the discovered reference lists. We could have,
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2429 // but the only benefit would be that, when marking restarts,
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2430 // less reference objects are discovered.
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2431 return;
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2432 }
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2433
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2434 ResourceMark rm;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2435 HandleMark hm;
3975 1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2436
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2437 G1CollectedHeap* g1h = G1CollectedHeap::heap();
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2438
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2439 // Is alive closure.
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2440 G1CMIsAliveClosure g1_is_alive(g1h);
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2441
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2442 // Inner scope to exclude the cleaning of the string and symbol
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2443 // tables from the displayed time.
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2444 {
6007 5c86f8211d1e 7160728: Introduce an extra logging level for G1 logging brutisso parents: 5988 diff changeset	2445 if (G1Log::finer()) {
3975 1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2446 gclog_or_tty->put(' ');
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2447 }
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	2448 GCTraceTime t("GC ref-proc", G1Log::finer(), false, g1h->gc_timer_cm());
3975 1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2449
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2450 ReferenceProcessor* rp = g1h->ref_processor_cm();
3975 1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2451
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2452 // See the comment in G1CollectedHeap::ref_processing_init()
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2453 // about how reference processing currently works in G1.
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2454
8014 f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2455 // Set the soft reference policy
3975 1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2456 rp->setup_policy(clear_all_soft_refs);
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2457 assert(_markStack.isEmpty(), "mark stack should be empty");
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2458
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2459 // Instances of the 'Keep Alive' and 'Complete GC' closures used
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2460 // in serial reference processing. Note these closures are also
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2461 // used for serially processing (by the the current thread) the
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2462 // JNI references during parallel reference processing.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2463 //
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2464 // These closures do not need to synchronize with the worker
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2465 // threads involved in parallel reference processing as these
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2466 // instances are executed serially by the current thread (e.g.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2467 // reference processing is not multi-threaded and is thus
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2468 // performed by the current thread instead of a gang worker).
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2469 //
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2470 // The gang tasks involved in parallel reference procssing create
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2471 // their own instances of these closures, which do their own
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2472 // synchronization among themselves.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2473 G1CMKeepAliveAndDrainClosure g1_keep_alive(this, task(0), true /* is_serial */);
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2474 G1CMDrainMarkingStackClosure g1_drain_mark_stack(this, task(0), true /* is_serial */);
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2475
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2476 // We need at least one active thread. If reference processing
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2477 // is not multi-threaded we use the current (VMThread) thread,
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2478 // otherwise we use the work gang from the G1CollectedHeap and
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2479 // we utilize all the worker threads we can.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2480 bool processing_is_mt = rp->processing_is_mt() && g1h->workers() != NULL;
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2481 uint active_workers = (processing_is_mt ? g1h->workers()->active_workers() : 1U);
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	2482 active_workers = MAX2(MIN2(active_workers, _max_worker_id), 1U);
3975 1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2483
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2484 // Parallel processing task executor.
4093 6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	2485 G1CMRefProcTaskExecutor par_task_executor(g1h, this,
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2486 g1h->workers(), active_workers);
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2487 AbstractRefProcTaskExecutor* executor = (processing_is_mt ? &par_task_executor : NULL);
8014 f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2488
8788 e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2489 // Set the concurrency level. The phase was already set prior to
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2490 // executing the remark task.
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2491 set_concurrency(active_workers);
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2492
8014 f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2493 // Set the degree of MT processing here. If the discovery was done MT,
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2494 // the number of threads involved during discovery could differ from
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2495 // the number of active workers. This is OK as long as the discovered
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2496 // Reference lists are balanced (see balance_all_queues() and balance_queues()).
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2497 rp->set_active_mt_degree(active_workers);
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2498
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2499 // Process the weak references.
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	2500 const ReferenceProcessorStats& stats =
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	2501 rp->process_discovered_references(&g1_is_alive,
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	2502 &g1_keep_alive,
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	2503 &g1_drain_mark_stack,
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	2504 executor,
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	2505 g1h->gc_timer_cm());
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	2506 g1h->gc_tracer_cm()->report_gc_reference_stats(stats);
8014 f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2507
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2508 // The do_oop work routines of the keep_alive and drain_marking_stack
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2509 // oop closures will set the has_overflown flag if we overflow the
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2510 // global marking stack.
3975 1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2511
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2512 assert(_markStack.overflow() \|\| _markStack.isEmpty(),
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2513 "mark stack should be empty (unless it overflowed)");
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2514
3975 1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2515 if (_markStack.overflow()) {
8014 f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2516 // This should have been done already when we tried to push an
3975 1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2517 // entry on to the global mark stack. But let's do it again.
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2518 set_has_overflown();
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2519 }
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2520
8014 f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2521 assert(rp->num_q() == active_workers, "why not");
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2522
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2523 rp->enqueue_discovered_references(executor);
3975 1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2524
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2525 rp->verify_no_references_recorded();
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2526 assert(!rp->discovery_enabled(), "Post condition");
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2527 }
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2528
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 2175 diff changeset	2529 // Now clean up stale oops in StringTable
2037 b03260081e9b 7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field johnc parents: 1974 diff changeset	2530 StringTable::unlink(&g1_is_alive);
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 2175 diff changeset	2531 // Clean up unreferenced symbols in symbol table.
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 2175 diff changeset	2532 SymbolTable::unlink();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2533 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2534
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2535 void ConcurrentMark::swapMarkBitMaps() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2536 CMBitMapRO* temp = _prevMarkBitMap;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2537 _prevMarkBitMap = (CMBitMapRO*)_nextMarkBitMap;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2538 _nextMarkBitMap = (CMBitMap*) temp;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2539 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2540
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2541 class CMRemarkTask: public AbstractGangTask {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2542 private:
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2543 ConcurrentMark* _cm;
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2544 bool _is_serial;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2545 public:
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	2546 void work(uint worker_id) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2547 // Since all available tasks are actually started, we should
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2548 // only proceed if we're supposed to be actived.
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	2549 if (worker_id < _cm->active_tasks()) {
441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	2550 CMTask* task = _cm->task(worker_id);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2551 task->record_start_time();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2552 do {
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2553 task->do_marking_step(1000000000.0 /* something very large */,
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2554 true /* do_termination */,
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2555 _is_serial);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2556 } while (task->has_aborted() && !_cm->has_overflown());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2557 // If we overflow, then we do not want to restart. We instead
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2558 // want to abort remark and do concurrent marking again.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2559 task->record_end_time();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2560 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2561 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2562
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2563 CMRemarkTask(ConcurrentMark* cm, int active_workers, bool is_serial) :
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2564 AbstractGangTask("Par Remark"), _cm(cm), _is_serial(is_serial) {
4711 adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	2565 _cm->terminator()->reset_for_reuse(active_workers);
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2566 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2567 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2568
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2569 void ConcurrentMark::checkpointRootsFinalWork() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2570 ResourceMark rm;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2571 HandleMark hm;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2572 G1CollectedHeap* g1h = G1CollectedHeap::heap();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2573
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2574 g1h->ensure_parsability(false);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2575
1833 8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1719 diff changeset	2576 if (G1CollectedHeap::use_parallel_gc_threads()) {
989 148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 912 diff changeset	2577 G1CollectedHeap::StrongRootsScope srs(g1h);
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2578 // this is remark, so we'll use up all active threads
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	2579 uint active_workers = g1h->workers()->active_workers();
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2580 if (active_workers == 0) {
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2581 assert(active_workers > 0, "Should have been set earlier");
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	2582 active_workers = (uint) ParallelGCThreads;
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2583 g1h->workers()->set_active_workers(active_workers);
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2584 }
8788 e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2585 set_concurrency_and_phase(active_workers, false /* concurrent */);
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2586 // Leave _parallel_marking_threads at it's
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2587 // value originally calculated in the ConcurrentMark
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2588 // constructor and pass values of the active workers
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2589 // through the gang in the task.
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2590
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2591 CMRemarkTask remarkTask(this, active_workers, false /* is_serial */);
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2592 // We will start all available threads, even if we decide that the
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2593 // active_workers will be fewer. The extra ones will just bail out
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2594 // immediately.
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2595 g1h->set_par_threads(active_workers);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2596 g1h->workers()->run_task(&remarkTask);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2597 g1h->set_par_threads(0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2598 } else {
989 148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 912 diff changeset	2599 G1CollectedHeap::StrongRootsScope srs(g1h);
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	2600 uint active_workers = 1;
8788 e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2601 set_concurrency_and_phase(active_workers, false /* concurrent */);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2602
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2603 // Note - if there's no work gang then the VMThread will be
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2604 // the thread to execute the remark - serially. We have
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2605 // to pass true for the is_serial parameter so that
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2606 // CMTask::do_marking_step() doesn't enter the sync
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2607 // barriers in the event of an overflow. Doing so will
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2608 // cause an assert that the current thread is not a
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2609 // concurrent GC thread.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2610 CMRemarkTask remarkTask(this, active_workers, true /* is_serial*/);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2611 remarkTask.work(0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2612 }
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	2613 SATBMarkQueueSet& satb_mq_set = JavaThread::satb_mark_queue_set();
8789 1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure johnc parents: 8788 diff changeset	2614 guarantee(has_overflown() \|\|
1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure johnc parents: 8788 diff changeset	2615 satb_mq_set.completed_buffers_num() == 0,
1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure johnc parents: 8788 diff changeset	2616 err_msg("Invariant: has_overflown = %s, num buffers = %d",
1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure johnc parents: 8788 diff changeset	2617 BOOL_TO_STR(has_overflown()),
1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure johnc parents: 8788 diff changeset	2618 satb_mq_set.completed_buffers_num()));
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2619
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2620 print_stats();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2621 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2622
1044 6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2623 #ifndef PRODUCT
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2624
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2625 class PrintReachableOopClosure: public OopClosure {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2626 private:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2627 G1CollectedHeap* _g1h;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2628 outputStream* _out;
3772 6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2629 VerifyOption _vo;
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2630 bool _all;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2631
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2632 public:
3772 6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2633 PrintReachableOopClosure(outputStream* out,
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2634 VerifyOption vo,
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2635 bool all) :
1044 6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2636 _g1h(G1CollectedHeap::heap()),
3772 6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2637 _out(out), _vo(vo), _all(all) { }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2638
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	2639 void do_oop(narrowOop* p) { do_oop_work(p); }
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	2640 void do_oop( oop* p) { do_oop_work(p); }
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	2641
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	2642 template <class T> void do_oop_work(T* p) {
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	2643 oop obj = oopDesc::load_decode_heap_oop(p);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2644 const char* str = NULL;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2645 const char* str2 = "";
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2646
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2647 if (obj == NULL) {
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2648 str = "";
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2649 } else if (!_g1h->is_in_g1_reserved(obj)) {
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2650 str = " O";
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2651 } else {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2652 HeapRegion* hr = _g1h->heap_region_containing(obj);
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	2653 guarantee(hr != NULL, "invariant");
6254 a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	2654 bool over_tams = _g1h->allocated_since_marking(obj, hr, _vo);
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	2655 bool marked = _g1h->is_marked(obj, _vo);
1044 6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2656
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2657 if (over_tams) {
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2658 str = " >";
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2659 if (marked) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2660 str2 = " AND MARKED";
1044 6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2661 }
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2662 } else if (marked) {
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2663 str = " M";
1044 6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2664 } else {
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2665 str = " NOT";
1044 6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2666 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2667 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2668
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2669 _out->print_cr(" "PTR_FORMAT": "PTR_FORMAT"%s%s",
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2670 p, (void*) obj, str, str2);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2671 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2672 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2673
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2674 class PrintReachableObjectClosure : public ObjectClosure {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2675 private:
3772 6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2676 G1CollectedHeap* _g1h;
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2677 outputStream* _out;
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2678 VerifyOption _vo;
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2679 bool _all;
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2680 HeapRegion* _hr;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2681
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2682 public:
3772 6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2683 PrintReachableObjectClosure(outputStream* out,
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2684 VerifyOption vo,
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2685 bool all,
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2686 HeapRegion* hr) :
3772 6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2687 _g1h(G1CollectedHeap::heap()),
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2688 _out(out), _vo(vo), _all(all), _hr(hr) { }
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2689
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2690 void do_object(oop o) {
6254 a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	2691 bool over_tams = _g1h->allocated_since_marking(o, _hr, _vo);
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	2692 bool marked = _g1h->is_marked(o, _vo);
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2693 bool print_it = _all \|\| over_tams \|\| marked;
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2694
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2695 if (print_it) {
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2696 _out->print_cr(" "PTR_FORMAT"%s",
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2697 o, (over_tams) ? " >" : (marked) ? " M" : "");
3772 6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2698 PrintReachableOopClosure oopCl(_out, _vo, _all);
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6254 diff changeset	2699 o->oop_iterate_no_header(&oopCl);
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2700 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2701 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2702 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2703
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2704 class PrintReachableRegionClosure : public HeapRegionClosure {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2705 private:
6254 a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	2706 G1CollectedHeap* _g1h;
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	2707 outputStream* _out;
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	2708 VerifyOption _vo;
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	2709 bool _all;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2710
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2711 public:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2712 bool doHeapRegion(HeapRegion* hr) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2713 HeapWord* b = hr->bottom();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2714 HeapWord* e = hr->end();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2715 HeapWord* t = hr->top();
6254 a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	2716 HeapWord* p = _g1h->top_at_mark_start(hr, _vo);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2717 _out->print_cr("** ["PTR_FORMAT", "PTR_FORMAT"] top: "PTR_FORMAT" "
1044 6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2718 "TAMS: "PTR_FORMAT, b, e, t, p);
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2719 _out->cr();
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2720
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2721 HeapWord* from = b;
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2722 HeapWord* to = t;
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2723
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2724 if (to > from) {
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2725 _out->print_cr("Objects in ["PTR_FORMAT", "PTR_FORMAT"]", from, to);
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2726 _out->cr();
3772 6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2727 PrintReachableObjectClosure ocl(_out, _vo, _all, hr);
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2728 hr->object_iterate_mem_careful(MemRegion(from, to), &ocl);
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2729 _out->cr();
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2730 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2731
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2732 return false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2733 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2734
3772 6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2735 PrintReachableRegionClosure(outputStream* out,
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2736 VerifyOption vo,
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2737 bool all) :
6254 a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	2738 _g1h(G1CollectedHeap::heap()), _out(out), _vo(vo), _all(all) { }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2739 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2740
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2741 void ConcurrentMark::print_reachable(const char* str,
3772 6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2742 VerifyOption vo,
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2743 bool all) {
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2744 gclog_or_tty->cr();
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2745 gclog_or_tty->print_cr("== Doing heap dump... ");
1044 6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2746
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2747 if (G1PrintReachableBaseFile == NULL) {
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2748 gclog_or_tty->print_cr(" #### error: no base file defined");
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2749 return;
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2750 }
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2751
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2752 if (strlen(G1PrintReachableBaseFile) + 1 + strlen(str) >
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2753 (JVM_MAXPATHLEN - 1)) {
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2754 gclog_or_tty->print_cr(" #### error: file name too long");
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2755 return;
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2756 }
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2757
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2758 char file_name[JVM_MAXPATHLEN];
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2759 sprintf(file_name, "%s.%s", G1PrintReachableBaseFile, str);
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2760 gclog_or_tty->print_cr(" dumping to file %s", file_name);
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2761
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2762 fileStream fout(file_name);
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2763 if (!fout.is_open()) {
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2764 gclog_or_tty->print_cr(" #### error: could not open file");
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2765 return;
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2766 }
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2767
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2768 outputStream* out = &fout;
6254 a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	2769 out->print_cr("-- USING %s", _g1h->top_at_mark_start_str(vo));
1044 6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2770 out->cr();
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2771
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2772 out->print_cr("--- ITERATING OVER REGIONS");
1044 6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2773 out->cr();
3772 6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2774 PrintReachableRegionClosure rcl(out, vo, all);
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2775 _g1h->heap_region_iterate(&rcl);
1044 6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2776 out->cr();
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2777
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2778 gclog_or_tty->print_cr(" done");
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2779 gclog_or_tty->flush();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2780 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2781
1044 6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2782 #endif // PRODUCT
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2783
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2784 void ConcurrentMark::clearRangePrevBitmap(MemRegion mr) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2785 // Note we are overriding the read-only view of the prev map here, via
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2786 // the cast.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2787 ((CMBitMap*)_prevMarkBitMap)->clearRange(mr);
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2788 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2789
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2790 void ConcurrentMark::clearRangeNextBitmap(MemRegion mr) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2791 _nextMarkBitMap->clearRange(mr);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2792 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2793
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2794 void ConcurrentMark::clearRangeBothBitmaps(MemRegion mr) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2795 clearRangePrevBitmap(mr);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2796 clearRangeNextBitmap(mr);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2797 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2798
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2799 HeapRegion*
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	2800 ConcurrentMark::claim_region(uint worker_id) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2801 // "checkpoint" the finger
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2802 HeapWord* finger = _finger;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2803
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2804 // _heap_end will not change underneath our feet; it only changes at
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2805 // yield points.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2806 while (finger < _heap_end) {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	2807 assert(_g1h->is_in_g1_reserved(finger), "invariant");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2808
3771 842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2809 // Note on how this code handles humongous regions. In the
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2810 // normal case the finger will reach the start of a "starts
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2811 // humongous" (SH) region. Its end will either be the end of the
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2812 // last "continues humongous" (CH) region in the sequence, or the
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2813 // standard end of the SH region (if the SH is the only region in
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2814 // the sequence). That way claim_region() will skip over the CH
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2815 // regions. However, there is a subtle race between a CM thread
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2816 // executing this method and a mutator thread doing a humongous
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2817 // object allocation. The two are not mutually exclusive as the CM
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2818 // thread does not need to hold the Heap_lock when it gets
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2819 // here. So there is a chance that claim_region() will come across
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2820 // a free region that's in the progress of becoming a SH or a CH
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2821 // region. In the former case, it will either
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2822 // a) Miss the update to the region's end, in which case it will
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2823 // visit every subsequent CH region, will find their bitmaps
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2824 // empty, and do nothing, or
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2825 // b) Will observe the update of the region's end (in which case
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2826 // it will skip the subsequent CH regions).
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2827 // If it comes across a region that suddenly becomes CH, the
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2828 // scenario will be similar to b). So, the race between
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2829 // claim_region() and a humongous object allocation might force us
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2830 // to do a bit of unnecessary work (due to some unnecessary bitmap
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2831 // iterations) but it should not introduce and correctness issues.
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2832 HeapRegion* curr_region = _g1h->heap_region_containing_raw(finger);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2833 HeapWord* bottom = curr_region->bottom();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2834 HeapWord* end = curr_region->end();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2835 HeapWord* limit = curr_region->next_top_at_mark_start();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2836
3771 842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2837 if (verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	2838 gclog_or_tty->print_cr("[%u] curr_region = "PTR_FORMAT" "
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2839 "["PTR_FORMAT", "PTR_FORMAT"), "
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2840 "limit = "PTR_FORMAT,
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	2841 worker_id, curr_region, bottom, end, limit);
3771 842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2842 }
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2843
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2844 // Is the gap between reading the finger and doing the CAS too long?
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2845 HeapWord* res = (HeapWord*) Atomic::cmpxchg_ptr(end, &_finger, finger);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2846 if (res == finger) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2847 // we succeeded
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2848
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2849 // notice that _finger == end cannot be guaranteed here since,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2850 // someone else might have moved the finger even further
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	2851 assert(_finger >= end, "the finger should have moved forward");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2852
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	2853 if (verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	2854 gclog_or_tty->print_cr("[%u] we were successful with region = "
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	2855 PTR_FORMAT, worker_id, curr_region);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	2856 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2857
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2858 if (limit > bottom) {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	2859 if (verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	2860 gclog_or_tty->print_cr("[%u] region "PTR_FORMAT" is not empty, "
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	2861 "returning it ", worker_id, curr_region);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	2862 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2863 return curr_region;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2864 } else {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	2865 assert(limit == bottom,
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	2866 "the region limit should be at bottom");
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	2867 if (verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	2868 gclog_or_tty->print_cr("[%u] region "PTR_FORMAT" is empty, "
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	2869 "returning NULL", worker_id, curr_region);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	2870 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2871 // we return NULL and the caller should try calling
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2872 // claim_region() again.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2873 return NULL;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2874 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2875 } else {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	2876 assert(_finger > finger, "the finger should have moved forward");
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	2877 if (verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	2878 gclog_or_tty->print_cr("[%u] somebody else moved the finger, "
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2879 "global finger = "PTR_FORMAT", "
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2880 "our finger = "PTR_FORMAT,
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	2881 worker_id, _finger, finger);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	2882 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2883
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2884 // read it again
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2885 finger = _finger;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2886 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2887 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2888
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2889 return NULL;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2890 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2891
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2892 #ifndef PRODUCT
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2893 enum VerifyNoCSetOopsPhase {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2894 VerifyNoCSetOopsStack,
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2895 VerifyNoCSetOopsQueues,
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2896 VerifyNoCSetOopsSATBCompleted,
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2897 VerifyNoCSetOopsSATBThread
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2898 };
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2899
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2900 class VerifyNoCSetOopsClosure : public OopClosure, public ObjectClosure {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2901 private:
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2902 G1CollectedHeap* _g1h;
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2903 VerifyNoCSetOopsPhase _phase;
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2904 int _info;
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2905
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2906 const char* phase_str() {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2907 switch (_phase) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2908 case VerifyNoCSetOopsStack: return "Stack";
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2909 case VerifyNoCSetOopsQueues: return "Queue";
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2910 case VerifyNoCSetOopsSATBCompleted: return "Completed SATB Buffers";
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2911 case VerifyNoCSetOopsSATBThread: return "Thread SATB Buffers";
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2912 default: ShouldNotReachHere();
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2913 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2914 return NULL;
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2915 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2916
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2917 void do_object_work(oop obj) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2918 guarantee(!_g1h->obj_in_cs(obj),
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2919 err_msg("obj: "PTR_FORMAT" in CSet, phase: %s, info: %d",
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2920 (void*) obj, phase_str(), _info));
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2921 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2922
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2923 public:
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2924 VerifyNoCSetOopsClosure() : _g1h(G1CollectedHeap::heap()) { }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2925
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2926 void set_phase(VerifyNoCSetOopsPhase phase, int info = -1) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2927 _phase = phase;
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2928 _info = info;
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2929 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2930
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2931 virtual void do_oop(oop* p) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2932 oop obj = oopDesc::load_decode_heap_oop(p);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2933 do_object_work(obj);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2934 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2935
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2936 virtual void do_oop(narrowOop* p) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2937 // We should not come across narrow oops while scanning marking
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2938 // stacks and SATB buffers.
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2939 ShouldNotReachHere();
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2940 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2941
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2942 virtual void do_object(oop obj) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2943 do_object_work(obj);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2944 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2945 };
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2946
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2947 void ConcurrentMark::verify_no_cset_oops(bool verify_stacks,
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2948 bool verify_enqueued_buffers,
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2949 bool verify_thread_buffers,
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2950 bool verify_fingers) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2951 assert(SafepointSynchronize::is_at_safepoint(), "should be at a safepoint");
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2952 if (!G1CollectedHeap::heap()->mark_in_progress()) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2953 return;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2954 }
1835 4805b9f4779e 6941395: G1: Use only lock-free versions of region stack push() and pop() johnc parents: 1833 diff changeset	2955
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2956 VerifyNoCSetOopsClosure cl;
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2957
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2958 if (verify_stacks) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2959 // Verify entries on the global mark stack
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2960 cl.set_phase(VerifyNoCSetOopsStack);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2961 _markStack.oops_do(&cl);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2962
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2963 // Verify entries on the task queues
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	2964 for (uint i = 0; i < _max_worker_id; i += 1) {
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2965 cl.set_phase(VerifyNoCSetOopsQueues, i);
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	2966 CMTaskQueue* queue = _task_queues->queue(i);
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2967 queue->oops_do(&cl);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2968 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2969 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2970
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2971 SATBMarkQueueSet& satb_qs = JavaThread::satb_mark_queue_set();
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2972
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2973 // Verify entries on the enqueued SATB buffers
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2974 if (verify_enqueued_buffers) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2975 cl.set_phase(VerifyNoCSetOopsSATBCompleted);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2976 satb_qs.iterate_completed_buffers_read_only(&cl);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2977 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2978
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2979 // Verify entries on the per-thread SATB buffers
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2980 if (verify_thread_buffers) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2981 cl.set_phase(VerifyNoCSetOopsSATBThread);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2982 satb_qs.iterate_thread_buffers_read_only(&cl);
1835 4805b9f4779e 6941395: G1: Use only lock-free versions of region stack push() and pop() johnc parents: 1833 diff changeset	2983 }
4805b9f4779e 6941395: G1: Use only lock-free versions of region stack push() and pop() johnc parents: 1833 diff changeset	2984
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2985 if (verify_fingers) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2986 // Verify the global finger
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2987 HeapWord* global_finger = finger();
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2988 if (global_finger != NULL && global_finger < _heap_end) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2989 // The global finger always points to a heap region boundary. We
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2990 // use heap_region_containing_raw() to get the containing region
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2991 // given that the global finger could be pointing to a free region
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2992 // which subsequently becomes continues humongous. If that
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2993 // happens, heap_region_containing() will return the bottom of the
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2994 // corresponding starts humongous region and the check below will
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2995 // not hold any more.
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2996 HeapRegion* global_hr = _g1h->heap_region_containing_raw(global_finger);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2997 guarantee(global_finger == global_hr->bottom(),
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2998 err_msg("global finger: "PTR_FORMAT" region: "HR_FORMAT,
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2999 global_finger, HR_FORMAT_PARAMS(global_hr)));
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3000 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3001
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3002 // Verify the task fingers
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3003 assert(parallel_marking_threads() <= _max_worker_id, "sanity");
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3004 for (int i = 0; i < (int) parallel_marking_threads(); i += 1) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3005 CMTask* task = _tasks[i];
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3006 HeapWord* task_finger = task->finger();
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3007 if (task_finger != NULL && task_finger < _heap_end) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3008 // See above note on the global finger verification.
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3009 HeapRegion* task_hr = _g1h->heap_region_containing_raw(task_finger);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3010 guarantee(task_finger == task_hr->bottom() \|\|
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3011 !task_hr->in_collection_set(),
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3012 err_msg("task finger: "PTR_FORMAT" region: "HR_FORMAT,
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3013 task_finger, HR_FORMAT_PARAMS(task_hr)));
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3014 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3015 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3016 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3017 }
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3018 #endif // PRODUCT
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3019
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3020 // Aggregate the counting data that was constructed concurrently
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3021 // with marking.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3022 class AggregateCountDataHRClosure: public HeapRegionClosure {
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	3023 G1CollectedHeap* _g1h;
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3024 ConcurrentMark* _cm;
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	3025 CardTableModRefBS* _ct_bs;
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3026 BitMap* _cm_card_bm;
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3027 uint _max_worker_id;
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3028
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3029 public:
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	3030 AggregateCountDataHRClosure(G1CollectedHeap* g1h,
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3031 BitMap* cm_card_bm,
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3032 uint max_worker_id) :
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	3033 _g1h(g1h), _cm(g1h->concurrent_mark()),
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	3034 _ct_bs((CardTableModRefBS*) (g1h->barrier_set())),
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3035 _cm_card_bm(cm_card_bm), _max_worker_id(max_worker_id) { }
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3036
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3037 bool doHeapRegion(HeapRegion* hr) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3038 if (hr->continuesHumongous()) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3039 // We will ignore these here and process them when their
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3040 // associated "starts humongous" region is processed.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3041 // Note that we cannot rely on their associated
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3042 // "starts humongous" region to have their bit set to 1
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3043 // since, due to the region chunking in the parallel region
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3044 // iteration, a "continues humongous" region might be visited
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3045 // before its associated "starts humongous".
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3046 return false;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3047 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3048
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3049 HeapWord* start = hr->bottom();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3050 HeapWord* limit = hr->next_top_at_mark_start();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3051 HeapWord* end = hr->end();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3052
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3053 assert(start <= limit && limit <= hr->top() && hr->top() <= hr->end(),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3054 err_msg("Preconditions not met - "
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3055 "start: "PTR_FORMAT", limit: "PTR_FORMAT", "
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3056 "top: "PTR_FORMAT", end: "PTR_FORMAT,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3057 start, limit, hr->top(), hr->end()));
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3058
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3059 assert(hr->next_marked_bytes() == 0, "Precondition");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3060
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3061 if (start == limit) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3062 // NTAMS of this region has not been set so nothing to do.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3063 return false;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3064 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3065
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	3066 // 'start' should be in the heap.
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	3067 assert(_g1h->is_in_g1_reserved(start) && _ct_bs->is_card_aligned(start), "sanity");
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	3068 // 'end' may be just beyone the end of the heap (if hr is the last region)
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	3069 assert(!_g1h->is_in_g1_reserved(end) \|\| _ct_bs->is_card_aligned(end), "sanity");
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3070
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3071 BitMap::idx_t start_idx = _cm->card_bitmap_index_for(start);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3072 BitMap::idx_t limit_idx = _cm->card_bitmap_index_for(limit);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3073 BitMap::idx_t end_idx = _cm->card_bitmap_index_for(end);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3074
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	3075 // If ntams is not card aligned then we bump card bitmap index
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	3076 // for limit so that we get the all the cards spanned by
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	3077 // the object ending at ntams.
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	3078 // Note: if this is the last region in the heap then ntams
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	3079 // could be actually just beyond the end of the the heap;
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	3080 // limit_idx will then correspond to a (non-existent) card
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	3081 // that is also outside the heap.
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	3082 if (_g1h->is_in_g1_reserved(limit) && !_ct_bs->is_card_aligned(limit)) {
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3083 limit_idx += 1;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3084 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3085
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3086 assert(limit_idx <= end_idx, "or else use atomics");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3087
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3088 // Aggregate the "stripe" in the count data associated with hr.
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	3089 uint hrs_index = hr->hrs_index();
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3090 size_t marked_bytes = 0;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3091
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3092 for (uint i = 0; i < _max_worker_id; i += 1) {
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3093 size_t* marked_bytes_array = _cm->count_marked_bytes_array_for(i);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3094 BitMap* task_card_bm = _cm->count_card_bitmap_for(i);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3095
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3096 // Fetch the marked_bytes in this region for task i and
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3097 // add it to the running total for this region.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3098 marked_bytes += marked_bytes_array[hrs_index];
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3099
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3100 // Now union the bitmaps[0,max_worker_id)[start_idx..limit_idx)
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3101 // into the global card bitmap.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3102 BitMap::idx_t scan_idx = task_card_bm->get_next_one_offset(start_idx, limit_idx);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3103
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3104 while (scan_idx < limit_idx) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3105 assert(task_card_bm->at(scan_idx) == true, "should be");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3106 _cm_card_bm->set_bit(scan_idx);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3107 assert(_cm_card_bm->at(scan_idx) == true, "should be");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3108
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3109 // BitMap::get_next_one_offset() can handle the case when
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3110 // its left_offset parameter is greater than its right_offset
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	3111 // parameter. It does, however, have an early exit if
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3112 // left_offset == right_offset. So let's limit the value
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3113 // passed in for left offset here.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3114 BitMap::idx_t next_idx = MIN2(scan_idx + 1, limit_idx);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3115 scan_idx = task_card_bm->get_next_one_offset(next_idx, limit_idx);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3116 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3117 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3118
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3119 // Update the marked bytes for this region.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3120 hr->add_to_marked_bytes(marked_bytes);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3121
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3122 // Next heap region
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3123 return false;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3124 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3125 };
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3126
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3127 class G1AggregateCountDataTask: public AbstractGangTask {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3128 protected:
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3129 G1CollectedHeap* _g1h;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3130 ConcurrentMark* _cm;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3131 BitMap* _cm_card_bm;
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3132 uint _max_worker_id;
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3133 int _active_workers;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3134
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3135 public:
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3136 G1AggregateCountDataTask(G1CollectedHeap* g1h,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3137 ConcurrentMark* cm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3138 BitMap* cm_card_bm,
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3139 uint max_worker_id,
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3140 int n_workers) :
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3141 AbstractGangTask("Count Aggregation"),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3142 _g1h(g1h), _cm(cm), _cm_card_bm(cm_card_bm),
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3143 _max_worker_id(max_worker_id),
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3144 _active_workers(n_workers) { }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3145
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3146 void work(uint worker_id) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3147 AggregateCountDataHRClosure cl(_g1h, _cm_card_bm, _max_worker_id);
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3148
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3149 if (G1CollectedHeap::use_parallel_gc_threads()) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3150 _g1h->heap_region_par_iterate_chunked(&cl, worker_id,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3151 _active_workers,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3152 HeapRegion::AggregateCountClaimValue);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3153 } else {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3154 _g1h->heap_region_iterate(&cl);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3155 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3156 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3157 };
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3158
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3159
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3160 void ConcurrentMark::aggregate_count_data() {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3161 int n_workers = (G1CollectedHeap::use_parallel_gc_threads() ?
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3162 _g1h->workers()->active_workers() :
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3163 1);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3164
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3165 G1AggregateCountDataTask g1_par_agg_task(_g1h, this, &_card_bm,
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3166 _max_worker_id, n_workers);
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3167
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3168 if (G1CollectedHeap::use_parallel_gc_threads()) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3169 assert(_g1h->check_heap_region_claim_values(HeapRegion::InitialClaimValue),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3170 "sanity check");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3171 _g1h->set_par_threads(n_workers);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3172 _g1h->workers()->run_task(&g1_par_agg_task);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3173 _g1h->set_par_threads(0);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3174
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3175 assert(_g1h->check_heap_region_claim_values(HeapRegion::AggregateCountClaimValue),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3176 "sanity check");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3177 _g1h->reset_heap_region_claim_values();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3178 } else {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3179 g1_par_agg_task.work(0);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3180 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3181 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3182
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3183 // Clear the per-worker arrays used to store the per-region counting data
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3184 void ConcurrentMark::clear_all_count_data() {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3185 // Clear the global card bitmap - it will be filled during
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3186 // liveness count aggregation (during remark) and the
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3187 // final counting task.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3188 _card_bm.clear();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3189
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3190 // Clear the global region bitmap - it will be filled as part
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3191 // of the final counting task.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3192 _region_bm.clear();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3193
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	3194 uint max_regions = _g1h->max_regions();
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3195 assert(_max_worker_id > 0, "uninitialized");
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3196
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3197 for (uint i = 0; i < _max_worker_id; i += 1) {
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3198 BitMap* task_card_bm = count_card_bitmap_for(i);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3199 size_t* marked_bytes_array = count_marked_bytes_array_for(i);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3200
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3201 assert(task_card_bm->size() == _card_bm.size(), "size mismatch");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3202 assert(marked_bytes_array != NULL, "uninitialized");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3203
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	3204 memset(marked_bytes_array, 0, (size_t) max_regions * sizeof(size_t));
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3205 task_card_bm->clear();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3206 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3207 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3208
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3209 void ConcurrentMark::print_stats() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3210 if (verbose_stats()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3211 gclog_or_tty->print_cr("---------------------------------------------------------------------");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3212 for (size_t i = 0; i < _active_tasks; ++i) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3213 _tasks[i]->print_stats();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3214 gclog_or_tty->print_cr("---------------------------------------------------------------------");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3215 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3216 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3217 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3218
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3219 // abandon current marking iteration due to a Full GC
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3220 void ConcurrentMark::abort() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3221 // Clear all marks to force marking thread to do nothing
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3222 _nextMarkBitMap->clearAll();
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3223 // Clear the liveness counting data
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3224 clear_all_count_data();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3225 // Empty mark stack
7450 d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	3226 reset_marking_state();
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3227 for (uint i = 0; i < _max_worker_id; ++i) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3228 _tasks[i]->clear_region_fields();
1835 4805b9f4779e 6941395: G1: Use only lock-free versions of region stack push() and pop() johnc parents: 1833 diff changeset	3229 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3230 _has_aborted = true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3231
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3232 SATBMarkQueueSet& satb_mq_set = JavaThread::satb_mark_queue_set();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3233 satb_mq_set.abandon_partial_marking();
1317 d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1314 diff changeset	3234 // This can be called either during or outside marking, we'll read
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1314 diff changeset	3235 // the expected_active value from the SATB queue set.
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1314 diff changeset	3236 satb_mq_set.set_active_all_threads(
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1314 diff changeset	3237 false, /* new active value */
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1314 diff changeset	3238 satb_mq_set.is_active() /* expected_active */);
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	3239
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	3240 _g1h->trace_heap_after_concurrent_cycle();
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	3241 _g1h->register_concurrent_cycle_end();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3242 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3243
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3244 static void print_ms_time_info(const char* prefix, const char* name,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3245 NumberSeq& ns) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3246 gclog_or_tty->print_cr("%s%5d %12s: total time = %8.2f s (avg = %8.2f ms).",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3247 prefix, ns.num(), name, ns.sum()/1000.0, ns.avg());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3248 if (ns.num() > 0) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3249 gclog_or_tty->print_cr("%s [std. dev = %8.2f ms, max = %8.2f ms]",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3250 prefix, ns.sd(), ns.maximum());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3251 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3252 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3253
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3254 void ConcurrentMark::print_summary_info() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3255 gclog_or_tty->print_cr(" Concurrent marking:");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3256 print_ms_time_info(" ", "init marks", _init_times);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3257 print_ms_time_info(" ", "remarks", _remark_times);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3258 {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3259 print_ms_time_info(" ", "final marks", _remark_mark_times);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3260 print_ms_time_info(" ", "weak refs", _remark_weak_ref_times);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3261
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3262 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3263 print_ms_time_info(" ", "cleanups", _cleanup_times);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3264 gclog_or_tty->print_cr(" Final counting total time = %8.2f s (avg = %8.2f ms).",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3265 _total_counting_time,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3266 (_cleanup_times.num() > 0 ? _total_counting_time * 1000.0 /
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3267 (double)_cleanup_times.num()
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3268 : 0.0));
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3269 if (G1ScrubRemSets) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3270 gclog_or_tty->print_cr(" RS scrub total time = %8.2f s (avg = %8.2f ms).",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3271 _total_rs_scrub_time,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3272 (_cleanup_times.num() > 0 ? _total_rs_scrub_time * 1000.0 /
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3273 (double)_cleanup_times.num()
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3274 : 0.0));
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3275 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3276 gclog_or_tty->print_cr(" Total stop_world time = %8.2f s.",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3277 (_init_times.sum() + _remark_times.sum() +
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3278 _cleanup_times.sum())/1000.0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3279 gclog_or_tty->print_cr(" Total concurrent time = %8.2f s "
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3280 "(%8.2f s marking).",
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3281 cmThread()->vtime_accum(),
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3282 cmThread()->vtime_mark_accum());
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3283 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3284
1019 035d2e036a9b 6885041: G1: inconsistent thread dump tonyp parents: 993 diff changeset	3285 void ConcurrentMark::print_worker_threads_on(outputStream* st) const {
8008 256d3f43c177 8005875: G1: Kitchensink fails with ParallelGCThreads=0 johnc parents: 8006 diff changeset	3286 if (use_parallel_marking_threads()) {
256d3f43c177 8005875: G1: Kitchensink fails with ParallelGCThreads=0 johnc parents: 8006 diff changeset	3287 _parallel_workers->print_worker_threads_on(st);
256d3f43c177 8005875: G1: Kitchensink fails with ParallelGCThreads=0 johnc parents: 8006 diff changeset	3288 }
1019 035d2e036a9b 6885041: G1: inconsistent thread dump tonyp parents: 993 diff changeset	3289 }
035d2e036a9b 6885041: G1: inconsistent thread dump tonyp parents: 993 diff changeset	3290
9076 7b835924c31c 8011872: Include Bit Map addresses in the hs_err files stefank parents: 8789 diff changeset	3291 void ConcurrentMark::print_on_error(outputStream* st) const {
7b835924c31c 8011872: Include Bit Map addresses in the hs_err files stefank parents: 8789 diff changeset	3292 st->print_cr("Marking Bits (Prev, Next): (CMBitMap) " PTR_FORMAT ", (CMBitMap) " PTR_FORMAT,
7b835924c31c 8011872: Include Bit Map addresses in the hs_err files stefank parents: 8789 diff changeset	3293 _prevMarkBitMap, _nextMarkBitMap);
7b835924c31c 8011872: Include Bit Map addresses in the hs_err files stefank parents: 8789 diff changeset	3294 _prevMarkBitMap->print_on_error(st, " Prev Bits: ");
7b835924c31c 8011872: Include Bit Map addresses in the hs_err files stefank parents: 8789 diff changeset	3295 _nextMarkBitMap->print_on_error(st, " Next Bits: ");
7b835924c31c 8011872: Include Bit Map addresses in the hs_err files stefank parents: 8789 diff changeset	3296 }
7b835924c31c 8011872: Include Bit Map addresses in the hs_err files stefank parents: 8789 diff changeset	3297
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3298 // We take a break if someone is trying to stop the world.
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	3299 bool ConcurrentMark::do_yield_check(uint worker_id) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3300 if (should_yield()) {
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	3301 if (worker_id == 0) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3302 _g1h->g1_policy()->record_concurrent_pause();
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3303 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3304 cmThread()->yield();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3305 return true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3306 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3307 return false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3308 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3309 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3310
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3311 bool ConcurrentMark::should_yield() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3312 return cmThread()->should_yield();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3313 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3314
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3315 bool ConcurrentMark::containing_card_is_marked(void* p) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3316 size_t offset = pointer_delta(p, _g1h->reserved_region().start(), 1);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3317 return _card_bm.at(offset >> CardTableModRefBS::card_shift);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3318 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3319
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3320 bool ConcurrentMark::containing_cards_are_marked(void* start,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3321 void* last) {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3322 return containing_card_is_marked(start) &&
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3323 containing_card_is_marked(last);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3324 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3325
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3326 #ifndef PRODUCT
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3327 // for debugging purposes
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3328 void ConcurrentMark::print_finger() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3329 gclog_or_tty->print_cr("heap ["PTR_FORMAT", "PTR_FORMAT"), global finger = "PTR_FORMAT,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3330 _heap_start, _heap_end, _finger);
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3331 for (uint i = 0; i < _max_worker_id; ++i) {
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3332 gclog_or_tty->print(" %u: "PTR_FORMAT, i, _tasks[i]->finger());
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3333 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3334 gclog_or_tty->print_cr("");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3335 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3336 #endif
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3337
3771 842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3338 void CMTask::scan_object(oop obj) {
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3339 assert(_nextMarkBitMap->isMarked((HeapWord*) obj), "invariant");
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3340
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3341 if (_cm->verbose_high()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3342 gclog_or_tty->print_cr("[%u] we're scanning object "PTR_FORMAT,
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3343 _worker_id, (void*) obj);
3771 842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3344 }
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3345
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3346 size_t obj_size = obj->size();
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3347 _words_scanned += obj_size;
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3348
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3349 obj->oop_iterate(_cm_oop_closure);
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3350 statsOnly( ++_objs_scanned );
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3351 check_limits();
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3352 }
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3353
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3354 // Closure for iteration over bitmaps
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3355 class CMBitMapClosure : public BitMapClosure {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3356 private:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3357 // the bitmap that is being iterated over
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3358 CMBitMap* _nextMarkBitMap;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3359 ConcurrentMark* _cm;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3360 CMTask* _task;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3361
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3362 public:
5988 2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	3363 CMBitMapClosure(CMTask task, ConcurrentMark cm, CMBitMap* nextMarkBitMap) :
2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	3364 _task(task), _cm(cm), _nextMarkBitMap(nextMarkBitMap) { }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3365
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3366 bool do_bit(size_t offset) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3367 HeapWord* addr = _nextMarkBitMap->offsetToHeapWord(offset);
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3368 assert(_nextMarkBitMap->isMarked(addr), "invariant");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3369 assert( addr < _cm->finger(), "invariant");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3370
5988 2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	3371 statsOnly( _task->increase_objs_found_on_bitmap() );
2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	3372 assert(addr >= _task->finger(), "invariant");
2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	3373
2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	3374 // We move that task's local finger along.
2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	3375 _task->move_finger_to(addr);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3376
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3377 _task->scan_object(oop(addr));
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3378 // we only partially drain the local queue and global stack
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3379 _task->drain_local_queue(true);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3380 _task->drain_global_stack(true);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3381
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3382 // if the has_aborted flag has been raised, we need to bail out of
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3383 // the iteration
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3384 return !_task->has_aborted();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3385 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3386 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3387
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3388 // Closure for iterating over objects, currently only used for
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3389 // processing SATB buffers.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3390 class CMObjectClosure : public ObjectClosure {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3391 private:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3392 CMTask* _task;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3393
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3394 public:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3395 void do_object(oop obj) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3396 _task->deal_with_reference(obj);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3397 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3398
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3399 CMObjectClosure(CMTask* task) : _task(task) { }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3400 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3401
3771 842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3402 G1CMOopClosure::G1CMOopClosure(G1CollectedHeap* g1h,
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3403 ConcurrentMark* cm,
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3404 CMTask* task)
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3405 : _g1h(g1h), _cm(cm), _task(task) {
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3406 assert(_ref_processor == NULL, "should be initialized to NULL");
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3407
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3408 if (G1UseConcMarkReferenceProcessing) {
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	3409 _ref_processor = g1h->ref_processor_cm();
3771 842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3410 assert(_ref_processor != NULL, "should not be NULL");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3411 }
3771 842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3412 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3413
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3414 void CMTask::setup_for_region(HeapRegion* hr) {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3415 // Separated the asserts so that we know which one fires.
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3416 assert(hr != NULL,
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3417 "claim_region() should have filtered out continues humongous regions");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3418 assert(!hr->continuesHumongous(),
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3419 "claim_region() should have filtered out continues humongous regions");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3420
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3421 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3422 gclog_or_tty->print_cr("[%u] setting up for region "PTR_FORMAT,
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3423 _worker_id, hr);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3424 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3425
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3426 _curr_region = hr;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3427 _finger = hr->bottom();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3428 update_region_limit();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3429 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3430
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3431 void CMTask::update_region_limit() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3432 HeapRegion* hr = _curr_region;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3433 HeapWord* bottom = hr->bottom();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3434 HeapWord* limit = hr->next_top_at_mark_start();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3435
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3436 if (limit == bottom) {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3437 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3438 gclog_or_tty->print_cr("[%u] found an empty region "
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3439 "["PTR_FORMAT", "PTR_FORMAT")",
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3440 _worker_id, bottom, limit);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3441 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3442 // The region was collected underneath our feet.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3443 // We set the finger to bottom to ensure that the bitmap
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3444 // iteration that will follow this will not do anything.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3445 // (this is not a condition that holds when we set the region up,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3446 // as the region is not supposed to be empty in the first place)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3447 _finger = bottom;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3448 } else if (limit >= _region_limit) {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3449 assert(limit >= _finger, "peace of mind");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3450 } else {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3451 assert(limit < _region_limit, "only way to get here");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3452 // This can happen under some pretty unusual circumstances. An
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3453 // evacuation pause empties the region underneath our feet (NTAMS
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3454 // at bottom). We then do some allocation in the region (NTAMS
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3455 // stays at bottom), followed by the region being used as a GC
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3456 // alloc region (NTAMS will move to top() and the objects
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3457 // originally below it will be grayed). All objects now marked in
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3458 // the region are explicitly grayed, if below the global finger,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3459 // and we do not need in fact to scan anything else. So, we simply
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3460 // set _finger to be limit to ensure that the bitmap iteration
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3461 // doesn't do anything.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3462 _finger = limit;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3463 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3464
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3465 _region_limit = limit;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3466 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3467
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3468 void CMTask::giveup_current_region() {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3469 assert(_curr_region != NULL, "invariant");
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3470 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3471 gclog_or_tty->print_cr("[%u] giving up region "PTR_FORMAT,
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3472 _worker_id, _curr_region);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3473 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3474 clear_region_fields();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3475 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3476
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3477 void CMTask::clear_region_fields() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3478 // Values for these three fields that indicate that we're not
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3479 // holding on to a region.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3480 _curr_region = NULL;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3481 _finger = NULL;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3482 _region_limit = NULL;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3483 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3484
3771 842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3485 void CMTask::set_cm_oop_closure(G1CMOopClosure* cm_oop_closure) {
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3486 if (cm_oop_closure == NULL) {
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3487 assert(_cm_oop_closure != NULL, "invariant");
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3488 } else {
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3489 assert(_cm_oop_closure == NULL, "invariant");
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3490 }
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3491 _cm_oop_closure = cm_oop_closure;
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3492 }
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3493
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3494 void CMTask::reset(CMBitMap* nextMarkBitMap) {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3495 guarantee(nextMarkBitMap != NULL, "invariant");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3496
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3497 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3498 gclog_or_tty->print_cr("[%u] resetting", _worker_id);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3499 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3500
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3501 _nextMarkBitMap = nextMarkBitMap;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3502 clear_region_fields();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3503
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3504 _calls = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3505 _elapsed_time_ms = 0.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3506 _termination_time_ms = 0.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3507 _termination_start_time_ms = 0.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3508
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3509 #if _MARKING_STATS_
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3510 _local_pushes = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3511 _local_pops = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3512 _local_max_size = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3513 _objs_scanned = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3514 _global_pushes = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3515 _global_pops = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3516 _global_max_size = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3517 _global_transfers_to = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3518 _global_transfers_from = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3519 _regions_claimed = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3520 _objs_found_on_bitmap = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3521 _satb_buffers_processed = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3522 _steal_attempts = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3523 _steals = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3524 _aborted = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3525 _aborted_overflow = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3526 _aborted_cm_aborted = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3527 _aborted_yield = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3528 _aborted_timed_out = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3529 _aborted_satb = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3530 _aborted_termination = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3531 #endif // _MARKING_STATS_
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3532 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3533
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3534 bool CMTask::should_exit_termination() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3535 regular_clock_call();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3536 // This is called when we are in the termination protocol. We should
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3537 // quit if, for some reason, this task wants to abort or the global
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3538 // stack is not empty (this means that we can get work from it).
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3539 return !_cm->mark_stack_empty() \|\| has_aborted();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3540 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3541
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3542 void CMTask::reached_limit() {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3543 assert(_words_scanned >= _words_scanned_limit \|\|
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3544 _refs_reached >= _refs_reached_limit ,
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3545 "shouldn't have been called otherwise");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3546 regular_clock_call();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3547 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3548
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3549 void CMTask::regular_clock_call() {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3550 if (has_aborted()) return;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3551
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3552 // First, we need to recalculate the words scanned and refs reached
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3553 // limits for the next clock call.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3554 recalculate_limits();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3555
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3556 // During the regular clock call we do the following
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3557
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3558 // (1) If an overflow has been flagged, then we abort.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3559 if (_cm->has_overflown()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3560 set_has_aborted();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3561 return;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3562 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3563
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3564 // If we are not concurrent (i.e. we're doing remark) we don't need
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3565 // to check anything else. The other steps are only needed during
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3566 // the concurrent marking phase.
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3567 if (!concurrent()) return;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3568
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3569 // (2) If marking has been aborted for Full GC, then we also abort.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3570 if (_cm->has_aborted()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3571 set_has_aborted();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3572 statsOnly( ++_aborted_cm_aborted );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3573 return;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3574 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3575
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3576 double curr_time_ms = os::elapsedVTime() * 1000.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3577
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3578 // (3) If marking stats are enabled, then we update the step history.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3579 #if _MARKING_STATS_
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3580 if (_words_scanned >= _words_scanned_limit) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3581 ++_clock_due_to_scanning;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3582 }
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3583 if (_refs_reached >= _refs_reached_limit) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3584 ++_clock_due_to_marking;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3585 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3586
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3587 double last_interval_ms = curr_time_ms - _interval_start_time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3588 _interval_start_time_ms = curr_time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3589 _all_clock_intervals_ms.add(last_interval_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3590
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3591 if (_cm->verbose_medium()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3592 gclog_or_tty->print_cr("[%u] regular clock, interval = %1.2lfms, "
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3593 "scanned = %d%s, refs reached = %d%s",
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3594 _worker_id, last_interval_ms,
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3595 _words_scanned,
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3596 (_words_scanned >= _words_scanned_limit) ? " (*)" : "",
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3597 _refs_reached,
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3598 (_refs_reached >= _refs_reached_limit) ? " (*)" : "");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3599 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3600 #endif // _MARKING_STATS_
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3601
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3602 // (4) We check whether we should yield. If we have to, then we abort.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3603 if (_cm->should_yield()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3604 // We should yield. To do this we abort the task. The caller is
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3605 // responsible for yielding.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3606 set_has_aborted();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3607 statsOnly( ++_aborted_yield );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3608 return;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3609 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3610
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3611 // (5) We check whether we've reached our time quota. If we have,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3612 // then we abort.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3613 double elapsed_time_ms = curr_time_ms - _start_time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3614 if (elapsed_time_ms > _time_target_ms) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3615 set_has_aborted();
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	3616 _has_timed_out = true;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3617 statsOnly( ++_aborted_timed_out );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3618 return;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3619 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3620
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3621 // (6) Finally, we check whether there are enough completed STAB
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3622 // buffers available for processing. If there are, we abort.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3623 SATBMarkQueueSet& satb_mq_set = JavaThread::satb_mark_queue_set();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3624 if (!_draining_satb_buffers && satb_mq_set.process_completed_buffers()) {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3625 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3626 gclog_or_tty->print_cr("[%u] aborting to deal with pending SATB buffers",
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3627 _worker_id);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3628 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3629 // we do need to process SATB buffers, we'll abort and restart
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3630 // the marking task to do so
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3631 set_has_aborted();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3632 statsOnly( ++_aborted_satb );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3633 return;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3634 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3635 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3636
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3637 void CMTask::recalculate_limits() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3638 _real_words_scanned_limit = _words_scanned + words_scanned_period;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3639 _words_scanned_limit = _real_words_scanned_limit;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3640
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3641 _real_refs_reached_limit = _refs_reached + refs_reached_period;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3642 _refs_reached_limit = _real_refs_reached_limit;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3643 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3644
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3645 void CMTask::decrease_limits() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3646 // This is called when we believe that we're going to do an infrequent
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3647 // operation which will increase the per byte scanned cost (i.e. move
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3648 // entries to/from the global stack). It basically tries to decrease the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3649 // scanning limit so that the clock is called earlier.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3650
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3651 if (_cm->verbose_medium()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3652 gclog_or_tty->print_cr("[%u] decreasing limits", _worker_id);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3653 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3654
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3655 _words_scanned_limit = _real_words_scanned_limit -
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3656 3 * words_scanned_period / 4;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3657 _refs_reached_limit = _real_refs_reached_limit -
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3658 3 * refs_reached_period / 4;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3659 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3660
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3661 void CMTask::move_entries_to_global_stack() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3662 // local array where we'll store the entries that will be popped
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3663 // from the local queue
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3664 oop buffer[global_stack_transfer_size];
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3665
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3666 int n = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3667 oop obj;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3668 while (n < global_stack_transfer_size && _task_queue->pop_local(obj)) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3669 buffer[n] = obj;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3670 ++n;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3671 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3672
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3673 if (n > 0) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3674 // we popped at least one entry from the local queue
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3675
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3676 statsOnly( ++_global_transfers_to; _local_pops += n );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3677
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3678 if (!_cm->mark_stack_push(buffer, n)) {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3679 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3680 gclog_or_tty->print_cr("[%u] aborting due to global stack overflow",
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3681 _worker_id);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3682 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3683 set_has_aborted();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3684 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3685 // the transfer was successful
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3686
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3687 if (_cm->verbose_medium()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3688 gclog_or_tty->print_cr("[%u] pushed %d entries to the global stack",
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3689 _worker_id, n);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3690 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3691 statsOnly( int tmp_size = _cm->mark_stack_size();
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3692 if (tmp_size > _global_max_size) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3693 _global_max_size = tmp_size;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3694 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3695 _global_pushes += n );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3696 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3697 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3698
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3699 // this operation was quite expensive, so decrease the limits
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3700 decrease_limits();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3701 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3702
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3703 void CMTask::get_entries_from_global_stack() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3704 // local array where we'll store the entries that will be popped
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3705 // from the global stack.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3706 oop buffer[global_stack_transfer_size];
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3707 int n;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3708 _cm->mark_stack_pop(buffer, global_stack_transfer_size, &n);
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3709 assert(n <= global_stack_transfer_size,
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3710 "we should not pop more than the given limit");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3711 if (n > 0) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3712 // yes, we did actually pop at least one entry
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3713
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3714 statsOnly( ++_global_transfers_from; _global_pops += n );
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3715 if (_cm->verbose_medium()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3716 gclog_or_tty->print_cr("[%u] popped %d entries from the global stack",
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3717 _worker_id, n);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3718 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3719 for (int i = 0; i < n; ++i) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3720 bool success = _task_queue->push(buffer[i]);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3721 // We only call this when the local queue is empty or under a
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3722 // given target limit. So, we do not expect this push to fail.
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3723 assert(success, "invariant");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3724 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3725
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3726 statsOnly( int tmp_size = _task_queue->size();
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3727 if (tmp_size > _local_max_size) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3728 _local_max_size = tmp_size;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3729 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3730 _local_pushes += n );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3731 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3732
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3733 // this operation was quite expensive, so decrease the limits
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3734 decrease_limits();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3735 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3736
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3737 void CMTask::drain_local_queue(bool partially) {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3738 if (has_aborted()) return;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3739
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3740 // Decide what the target size is, depending whether we're going to
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3741 // drain it partially (so that other tasks can steal if they run out
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3742 // of things to do) or totally (at the very end).
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3743 size_t target_size;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3744 if (partially) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3745 target_size = MIN2((size_t)_task_queue->max_elems()/3, GCDrainStackTargetSize);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3746 } else {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3747 target_size = 0;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3748 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3749
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3750 if (_task_queue->size() > target_size) {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3751 if (_cm->verbose_high()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3752 gclog_or_tty->print_cr("[%u] draining local queue, target size = %d",
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3753 _worker_id, target_size);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3754 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3755
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3756 oop obj;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3757 bool ret = _task_queue->pop_local(obj);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3758 while (ret) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3759 statsOnly( ++_local_pops );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3760
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3761 if (_cm->verbose_high()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3762 gclog_or_tty->print_cr("[%u] popped "PTR_FORMAT, _worker_id,
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3763 (void*) obj);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3764 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3765
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3766 assert(_g1h->is_in_g1_reserved((HeapWord*) obj), "invariant" );
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2177 diff changeset	3767 assert(!_g1h->is_on_master_free_list(
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	3768 _g1h->heap_region_containing((HeapWord*) obj)), "invariant");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3769
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3770 scan_object(obj);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3771
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3772 if (_task_queue->size() <= target_size \|\| has_aborted()) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3773 ret = false;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3774 } else {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3775 ret = _task_queue->pop_local(obj);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3776 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3777 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3778
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3779 if (_cm->verbose_high()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3780 gclog_or_tty->print_cr("[%u] drained local queue, size = %d",
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3781 _worker_id, _task_queue->size());
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3782 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3783 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3784 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3785
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3786 void CMTask::drain_global_stack(bool partially) {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3787 if (has_aborted()) return;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3788
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3789 // We have a policy to drain the local queue before we attempt to
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3790 // drain the global stack.
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3791 assert(partially \|\| _task_queue->size() == 0, "invariant");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3792
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3793 // Decide what the target size is, depending whether we're going to
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3794 // drain it partially (so that other tasks can steal if they run out
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3795 // of things to do) or totally (at the very end). Notice that,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3796 // because we move entries from the global stack in chunks or
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3797 // because another task might be doing the same, we might in fact
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3798 // drop below the target. But, this is not a problem.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3799 size_t target_size;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3800 if (partially) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3801 target_size = _cm->partial_mark_stack_size_target();
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3802 } else {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3803 target_size = 0;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3804 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3805
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3806 if (_cm->mark_stack_size() > target_size) {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3807 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3808 gclog_or_tty->print_cr("[%u] draining global_stack, target size %d",
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3809 _worker_id, target_size);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3810 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3811
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3812 while (!has_aborted() && _cm->mark_stack_size() > target_size) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3813 get_entries_from_global_stack();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3814 drain_local_queue(partially);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3815 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3816
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3817 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3818 gclog_or_tty->print_cr("[%u] drained global stack, size = %d",
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3819 _worker_id, _cm->mark_stack_size());
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3820 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3821 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3822 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3823
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3824 // SATB Queue has several assumptions on whether to call the par or
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3825 // non-par versions of the methods. this is why some of the code is
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3826 // replicated. We should really get rid of the single-threaded version
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3827 // of the code to simplify things.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3828 void CMTask::drain_satb_buffers() {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3829 if (has_aborted()) return;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3830
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3831 // We set this so that the regular clock knows that we're in the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3832 // middle of draining buffers and doesn't set the abort flag when it
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3833 // notices that SATB buffers are available for draining. It'd be
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3834 // very counter productive if it did that. :-)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3835 _draining_satb_buffers = true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3836
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3837 CMObjectClosure oc(this);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3838 SATBMarkQueueSet& satb_mq_set = JavaThread::satb_mark_queue_set();
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3839 if (G1CollectedHeap::use_parallel_gc_threads()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3840 satb_mq_set.set_par_closure(_worker_id, &oc);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3841 } else {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3842 satb_mq_set.set_closure(&oc);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3843 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3844
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3845 // This keeps claiming and applying the closure to completed buffers
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3846 // until we run out of buffers or we need to abort.
1833 8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1719 diff changeset	3847 if (G1CollectedHeap::use_parallel_gc_threads()) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3848 while (!has_aborted() &&
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3849 satb_mq_set.par_apply_closure_to_completed_buffer(_worker_id)) {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3850 if (_cm->verbose_medium()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3851 gclog_or_tty->print_cr("[%u] processed an SATB buffer", _worker_id);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3852 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3853 statsOnly( ++_satb_buffers_processed );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3854 regular_clock_call();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3855 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3856 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3857 while (!has_aborted() &&
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3858 satb_mq_set.apply_closure_to_completed_buffer()) {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3859 if (_cm->verbose_medium()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3860 gclog_or_tty->print_cr("[%u] processed an SATB buffer", _worker_id);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3861 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3862 statsOnly( ++_satb_buffers_processed );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3863 regular_clock_call();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3864 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3865 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3866
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3867 if (!concurrent() && !has_aborted()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3868 // We should only do this during remark.
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3869 if (G1CollectedHeap::use_parallel_gc_threads()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3870 satb_mq_set.par_iterate_closure_all_threads(_worker_id);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3871 } else {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3872 satb_mq_set.iterate_closure_all_threads();
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3873 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3874 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3875
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3876 _draining_satb_buffers = false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3877
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3878 assert(has_aborted() \|\|
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3879 concurrent() \|\|
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3880 satb_mq_set.completed_buffers_num() == 0, "invariant");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3881
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3882 if (G1CollectedHeap::use_parallel_gc_threads()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3883 satb_mq_set.set_par_closure(_worker_id, NULL);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3884 } else {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3885 satb_mq_set.set_closure(NULL);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3886 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3887
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3888 // again, this was a potentially expensive operation, decrease the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3889 // limits to get the regular clock call early
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3890 decrease_limits();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3891 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3892
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3893 void CMTask::print_stats() {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3894 gclog_or_tty->print_cr("Marking Stats, task = %u, calls = %d",
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3895 _worker_id, _calls);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3896 gclog_or_tty->print_cr(" Elapsed time = %1.2lfms, Termination time = %1.2lfms",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3897 _elapsed_time_ms, _termination_time_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3898 gclog_or_tty->print_cr(" Step Times (cum): num = %d, avg = %1.2lfms, sd = %1.2lfms",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3899 _step_times_ms.num(), _step_times_ms.avg(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3900 _step_times_ms.sd());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3901 gclog_or_tty->print_cr(" max = %1.2lfms, total = %1.2lfms",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3902 _step_times_ms.maximum(), _step_times_ms.sum());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3903
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3904 #if _MARKING_STATS_
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3905 gclog_or_tty->print_cr(" Clock Intervals (cum): num = %d, avg = %1.2lfms, sd = %1.2lfms",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3906 _all_clock_intervals_ms.num(), _all_clock_intervals_ms.avg(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3907 _all_clock_intervals_ms.sd());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3908 gclog_or_tty->print_cr(" max = %1.2lfms, total = %1.2lfms",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3909 _all_clock_intervals_ms.maximum(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3910 _all_clock_intervals_ms.sum());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3911 gclog_or_tty->print_cr(" Clock Causes (cum): scanning = %d, marking = %d",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3912 _clock_due_to_scanning, _clock_due_to_marking);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3913 gclog_or_tty->print_cr(" Objects: scanned = %d, found on the bitmap = %d",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3914 _objs_scanned, _objs_found_on_bitmap);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3915 gclog_or_tty->print_cr(" Local Queue: pushes = %d, pops = %d, max size = %d",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3916 _local_pushes, _local_pops, _local_max_size);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3917 gclog_or_tty->print_cr(" Global Stack: pushes = %d, pops = %d, max size = %d",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3918 _global_pushes, _global_pops, _global_max_size);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3919 gclog_or_tty->print_cr(" transfers to = %d, transfers from = %d",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3920 _global_transfers_to,_global_transfers_from);
5988 2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	3921 gclog_or_tty->print_cr(" Regions: claimed = %d", _regions_claimed);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3922 gclog_or_tty->print_cr(" SATB buffers: processed = %d", _satb_buffers_processed);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3923 gclog_or_tty->print_cr(" Steals: attempts = %d, successes = %d",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3924 _steal_attempts, _steals);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3925 gclog_or_tty->print_cr(" Aborted: %d, due to", _aborted);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3926 gclog_or_tty->print_cr(" overflow: %d, global abort: %d, yield: %d",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3927 _aborted_overflow, _aborted_cm_aborted, _aborted_yield);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3928 gclog_or_tty->print_cr(" time out: %d, SATB: %d, termination: %d",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3929 _aborted_timed_out, _aborted_satb, _aborted_termination);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3930 #endif // _MARKING_STATS_
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3931 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3932
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3933 /*****************************************************************************
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3934
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	3935 The do_marking_step(time_target_ms, ...) method is the building
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	3936 block of the parallel marking framework. It can be called in parallel
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3937 with other invocations of do_marking_step() on different tasks
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3938 (but only one per task, obviously) and concurrently with the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3939 mutator threads, or during remark, hence it eliminates the need
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3940 for two versions of the code. When called during remark, it will
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3941 pick up from where the task left off during the concurrent marking
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3942 phase. Interestingly, tasks are also claimable during evacuation
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3943 pauses too, since do_marking_step() ensures that it aborts before
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3944 it needs to yield.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3945
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	3946 The data structures that it uses to do marking work are the
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3947 following:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3948
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3949 (1) Marking Bitmap. If there are gray objects that appear only
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3950 on the bitmap (this happens either when dealing with an overflow
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3951 or when the initial marking phase has simply marked the roots
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3952 and didn't push them on the stack), then tasks claim heap
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3953 regions whose bitmap they then scan to find gray objects. A
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3954 global finger indicates where the end of the last claimed region
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3955 is. A local finger indicates how far into the region a task has
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3956 scanned. The two fingers are used to determine how to gray an
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3957 object (i.e. whether simply marking it is OK, as it will be
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3958 visited by a task in the future, or whether it needs to be also
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3959 pushed on a stack).
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3960
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3961 (2) Local Queue. The local queue of the task which is accessed
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3962 reasonably efficiently by the task. Other tasks can steal from
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3963 it when they run out of work. Throughout the marking phase, a
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3964 task attempts to keep its local queue short but not totally
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3965 empty, so that entries are available for stealing by other
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3966 tasks. Only when there is no more work, a task will totally
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3967 drain its local queue.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3968
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3969 (3) Global Mark Stack. This handles local queue overflow. During
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3970 marking only sets of entries are moved between it and the local
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3971 queues, as access to it requires a mutex and more fine-grain
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3972 interaction with it which might cause contention. If it
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3973 overflows, then the marking phase should restart and iterate
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3974 over the bitmap to identify gray objects. Throughout the marking
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3975 phase, tasks attempt to keep the global mark stack at a small
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3976 length but not totally empty, so that entries are available for
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3977 popping by other tasks. Only when there is no more work, tasks
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3978 will totally drain the global mark stack.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3979
5988 2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	3980 (4) SATB Buffer Queue. This is where completed SATB buffers are
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3981 made available. Buffers are regularly removed from this queue
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3982 and scanned for roots, so that the queue doesn't get too
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3983 long. During remark, all completed buffers are processed, as
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3984 well as the filled in parts of any uncompleted buffers.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3985
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3986 The do_marking_step() method tries to abort when the time target
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3987 has been reached. There are a few other cases when the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3988 do_marking_step() method also aborts:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3989
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3990 (1) When the marking phase has been aborted (after a Full GC).
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3991
5988 2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	3992 (2) When a global overflow (on the global stack) has been
2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	3993 triggered. Before the task aborts, it will actually sync up with
2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	3994 the other tasks to ensure that all the marking data structures
8788 e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	3995 (local queues, stacks, fingers etc.) are re-initialized so that
5988 2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	3996 when do_marking_step() completes, the marking phase can
2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	3997 immediately restart.
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3998
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3999 (3) When enough completed SATB buffers are available. The
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4000 do_marking_step() method only tries to drain SATB buffers right
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4001 at the beginning. So, if enough buffers are available, the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4002 marking step aborts and the SATB buffers are processed at
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4003 the beginning of the next invocation.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4004
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4005 (4) To yield. when we have to yield then we abort and yield
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4006 right at the end of do_marking_step(). This saves us from a lot
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4007 of hassle as, by yielding we might allow a Full GC. If this
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4008 happens then objects will be compacted underneath our feet, the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4009 heap might shrink, etc. We save checking for this by just
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4010 aborting and doing the yield right at the end.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4011
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4012 From the above it follows that the do_marking_step() method should
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4013 be called in a loop (or, otherwise, regularly) until it completes.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4014
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4015 If a marking step completes without its has_aborted() flag being
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4016 true, it means it has completed the current marking phase (and
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4017 also all other marking tasks have done so and have all synced up).
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4018
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4019 A method called regular_clock_call() is invoked "regularly" (in
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4020 sub ms intervals) throughout marking. It is this clock method that
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4021 checks all the abort conditions which were mentioned above and
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4022 decides when the task should abort. A work-based scheme is used to
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4023 trigger this clock method: when the number of object words the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4024 marking phase has scanned or the number of references the marking
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4025 phase has visited reach a given limit. Additional invocations to
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4026 the method clock have been planted in a few other strategic places
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4027 too. The initial reason for the clock method was to avoid calling
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4028 vtime too regularly, as it is quite expensive. So, once it was in
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4029 place, it was natural to piggy-back all the other conditions on it
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4030 too and not constantly check them throughout the code.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4031
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4032 If do_termination is true then do_marking_step will enter its
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4033 termination protocol.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4034
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4035 The value of is_serial must be true when do_marking_step is being
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4036 called serially (i.e. by the VMThread) and do_marking_step should
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4037 skip any synchronization in the termination and overflow code.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4038 Examples include the serial remark code and the serial reference
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4039 processing closures.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4040
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4041 The value of is_serial must be false when do_marking_step is
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4042 being called by any of the worker threads in a work gang.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4043 Examples include the concurrent marking code (CMMarkingTask),
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4044 the MT remark code, and the MT reference processing closures.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4045
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4046 *****************************************************************************/
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4047
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	4048 void CMTask::do_marking_step(double time_target_ms,
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4049 bool do_termination,
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4050 bool is_serial) {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4051 assert(time_target_ms >= 1.0, "minimum granularity is 1ms");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4052 assert(concurrent() == _cm->concurrent(), "they should be the same");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4053
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4054 G1CollectorPolicy* g1_policy = _g1h->g1_policy();
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4055 assert(_task_queues != NULL, "invariant");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4056 assert(_task_queue != NULL, "invariant");
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4057 assert(_task_queues->queue(_worker_id) == _task_queue, "invariant");
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4058
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4059 assert(!_claimed,
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4060 "only one thread should claim this task at any one time");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4061
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4062 // OK, this doesn't safeguard again all possible scenarios, as it is
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4063 // possible for two threads to set the _claimed flag at the same
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4064 // time. But it is only for debugging purposes anyway and it will
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4065 // catch most problems.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4066 _claimed = true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4067
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4068 _start_time_ms = os::elapsedVTime() * 1000.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4069 statsOnly( _interval_start_time_ms = _start_time_ms );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4070
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4071 // If do_stealing is true then do_marking_step will attempt to
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4072 // steal work from the other CMTasks. It only makes sense to
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4073 // enable stealing when the termination protocol is enabled
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4074 // and do_marking_step() is not being called serially.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4075 bool do_stealing = do_termination && !is_serial;
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4076
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4077 double diff_prediction_ms =
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4078 g1_policy->get_new_prediction(&_marking_step_diffs_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4079 _time_target_ms = time_target_ms - diff_prediction_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4080
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4081 // set up the variables that are used in the work-based scheme to
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4082 // call the regular clock method
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4083 _words_scanned = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4084 _refs_reached = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4085 recalculate_limits();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4086
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4087 // clear all flags
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4088 clear_has_aborted();
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	4089 _has_timed_out = false;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4090 _draining_satb_buffers = false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4091
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4092 ++_calls;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4093
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4094 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4095 gclog_or_tty->print_cr("[%u] >>>>>>>>>> START, call = %d, "
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4096 "target = %1.2lfms >>>>>>>>>>",
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4097 _worker_id, _calls, _time_target_ms);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4098 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4099
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4100 // Set up the bitmap and oop closures. Anything that uses them is
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4101 // eventually called from this method, so it is OK to allocate these
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4102 // statically.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4103 CMBitMapClosure bitmap_closure(this, _cm, _nextMarkBitMap);
3771 842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	4104 G1CMOopClosure cm_oop_closure(_g1h, _cm, this);
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	4105 set_cm_oop_closure(&cm_oop_closure);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4106
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4107 if (_cm->has_overflown()) {
5988 2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	4108 // This can happen if the mark stack overflows during a GC pause
2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	4109 // and this task, after a yield point, restarts. We have to abort
2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	4110 // as we need to get into the overflow protocol which happens
2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	4111 // right at the end of this task.
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4112 set_has_aborted();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4113 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4114
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4115 // First drain any available SATB buffers. After this, we will not
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4116 // look at SATB buffers before the next invocation of this method.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4117 // If enough completed SATB buffers are queued up, the regular clock
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4118 // will abort this task so that it restarts.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4119 drain_satb_buffers();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4120 // ...then partially drain the local queue and the global stack
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4121 drain_local_queue(true);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4122 drain_global_stack(true);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4123
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4124 do {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4125 if (!has_aborted() && _curr_region != NULL) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4126 // This means that we're already holding on to a region.
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4127 assert(_finger != NULL, "if region is not NULL, then the finger "
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4128 "should not be NULL either");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4129
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4130 // We might have restarted this task after an evacuation pause
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4131 // which might have evacuated the region we're holding on to
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4132 // underneath our feet. Let's read its limit again to make sure
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4133 // that we do not iterate over a region of the heap that
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4134 // contains garbage (update_region_limit() will also move
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4135 // _finger to the start of the region if it is found empty).
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4136 update_region_limit();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4137 // We will start from _finger not from the start of the region,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4138 // as we might be restarting this task after aborting half-way
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4139 // through scanning this region. In this case, _finger points to
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4140 // the address where we last found a marked object. If this is a
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4141 // fresh region, _finger points to start().
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4142 MemRegion mr = MemRegion(_finger, _region_limit);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4143
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4144 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4145 gclog_or_tty->print_cr("[%u] we're scanning part "
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4146 "["PTR_FORMAT", "PTR_FORMAT") "
8039 5e401ef52ec0 8007772: G1: assert(!hr->isHumongous() \|\| mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions johnc parents: 8034 diff changeset	4147 "of region "HR_FORMAT,
5e401ef52ec0 8007772: G1: assert(!hr->isHumongous() \|\| mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions johnc parents: 8034 diff changeset	4148 _worker_id, _finger, _region_limit,
5e401ef52ec0 8007772: G1: assert(!hr->isHumongous() \|\| mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions johnc parents: 8034 diff changeset	4149 HR_FORMAT_PARAMS(_curr_region));
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4150 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4151
8039 5e401ef52ec0 8007772: G1: assert(!hr->isHumongous() \|\| mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions johnc parents: 8034 diff changeset	4152 assert(!_curr_region->isHumongous() \|\| mr.start() == _curr_region->bottom(),
5e401ef52ec0 8007772: G1: assert(!hr->isHumongous() \|\| mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions johnc parents: 8034 diff changeset	4153 "humongous regions should go around loop once only");
5e401ef52ec0 8007772: G1: assert(!hr->isHumongous() \|\| mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions johnc parents: 8034 diff changeset	4154
5e401ef52ec0 8007772: G1: assert(!hr->isHumongous() \|\| mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions johnc parents: 8034 diff changeset	4155 // Some special cases:
5e401ef52ec0 8007772: G1: assert(!hr->isHumongous() \|\| mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions johnc parents: 8034 diff changeset	4156 // If the memory region is empty, we can just give up the region.
5e401ef52ec0 8007772: G1: assert(!hr->isHumongous() \|\| mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions johnc parents: 8034 diff changeset	4157 // If the current region is humongous then we only need to check
5e401ef52ec0 8007772: G1: assert(!hr->isHumongous() \|\| mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions johnc parents: 8034 diff changeset	4158 // the bitmap for the bit associated with the start of the object,
5e401ef52ec0 8007772: G1: assert(!hr->isHumongous() \|\| mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions johnc parents: 8034 diff changeset	4159 // scan the object if it's live, and give up the region.
5e401ef52ec0 8007772: G1: assert(!hr->isHumongous() \|\| mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions johnc parents: 8034 diff changeset	4160 // Otherwise, let's iterate over the bitmap of the part of the region
5e401ef52ec0 8007772: G1: assert(!hr->isHumongous() \|\| mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions johnc parents: 8034 diff changeset	4161 // that is left.
8034 bce1ac447f6b 7052429: G1: Avoid unnecessary scanning of humongous regions during concurrent marking johnc parents: 8014 diff changeset	4162 // If the iteration is successful, give up the region.
8039 5e401ef52ec0 8007772: G1: assert(!hr->isHumongous() \|\| mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions johnc parents: 8034 diff changeset	4163 if (mr.is_empty()) {
5e401ef52ec0 8007772: G1: assert(!hr->isHumongous() \|\| mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions johnc parents: 8034 diff changeset	4164 giveup_current_region();
5e401ef52ec0 8007772: G1: assert(!hr->isHumongous() \|\| mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions johnc parents: 8034 diff changeset	4165 regular_clock_call();
5e401ef52ec0 8007772: G1: assert(!hr->isHumongous() \|\| mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions johnc parents: 8034 diff changeset	4166 } else if (_curr_region->isHumongous() && mr.start() == _curr_region->bottom()) {
5e401ef52ec0 8007772: G1: assert(!hr->isHumongous() \|\| mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions johnc parents: 8034 diff changeset	4167 if (_nextMarkBitMap->isMarked(mr.start())) {
5e401ef52ec0 8007772: G1: assert(!hr->isHumongous() \|\| mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions johnc parents: 8034 diff changeset	4168 // The object is marked - apply the closure
5e401ef52ec0 8007772: G1: assert(!hr->isHumongous() \|\| mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions johnc parents: 8034 diff changeset	4169 BitMap::idx_t offset = _nextMarkBitMap->heapWordToOffset(mr.start());
5e401ef52ec0 8007772: G1: assert(!hr->isHumongous() \|\| mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions johnc parents: 8034 diff changeset	4170 bitmap_closure.do_bit(offset);
5e401ef52ec0 8007772: G1: assert(!hr->isHumongous() \|\| mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions johnc parents: 8034 diff changeset	4171 }
5e401ef52ec0 8007772: G1: assert(!hr->isHumongous() \|\| mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions johnc parents: 8034 diff changeset	4172 // Even if this task aborted while scanning the humongous object
5e401ef52ec0 8007772: G1: assert(!hr->isHumongous() \|\| mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions johnc parents: 8034 diff changeset	4173 // we can (and should) give up the current region.
5e401ef52ec0 8007772: G1: assert(!hr->isHumongous() \|\| mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions johnc parents: 8034 diff changeset	4174 giveup_current_region();
5e401ef52ec0 8007772: G1: assert(!hr->isHumongous() \|\| mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions johnc parents: 8034 diff changeset	4175 regular_clock_call();
5e401ef52ec0 8007772: G1: assert(!hr->isHumongous() \|\| mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions johnc parents: 8034 diff changeset	4176 } else if (_nextMarkBitMap->iterate(&bitmap_closure, mr)) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4177 giveup_current_region();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4178 regular_clock_call();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4179 } else {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4180 assert(has_aborted(), "currently the only way to do so");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4181 // The only way to abort the bitmap iteration is to return
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4182 // false from the do_bit() method. However, inside the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4183 // do_bit() method we move the _finger to point to the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4184 // object currently being looked at. So, if we bail out, we
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4185 // have definitely set _finger to something non-null.
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4186 assert(_finger != NULL, "invariant");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4187
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4188 // Region iteration was actually aborted. So now _finger
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4189 // points to the address of the object we last scanned. If we
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4190 // leave it there, when we restart this task, we will rescan
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4191 // the object. It is easy to avoid this. We move the finger by
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4192 // enough to point to the next possible object header (the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4193 // bitmap knows by how much we need to move it as it knows its
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4194 // granularity).
1314 3f0549ed0c98 6921710: G1: assert(new_finger >= _finger && new_finger < _region_limit,"invariant") apetrusenko parents: 1284 diff changeset	4195 assert(_finger < _region_limit, "invariant");
8733 9def4075da6d 8008079: G1: Add nextObject routine to CMBitMapRO and replace nextWord tamao parents: 8039 diff changeset	4196 HeapWord* new_finger = _nextMarkBitMap->nextObject(_finger);
1314 3f0549ed0c98 6921710: G1: assert(new_finger >= _finger && new_finger < _region_limit,"invariant") apetrusenko parents: 1284 diff changeset	4197 // Check if bitmap iteration was aborted while scanning the last object
3f0549ed0c98 6921710: G1: assert(new_finger >= _finger && new_finger < _region_limit,"invariant") apetrusenko parents: 1284 diff changeset	4198 if (new_finger >= _region_limit) {
5988 2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	4199 giveup_current_region();
1314 3f0549ed0c98 6921710: G1: assert(new_finger >= _finger && new_finger < _region_limit,"invariant") apetrusenko parents: 1284 diff changeset	4200 } else {
5988 2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	4201 move_finger_to(new_finger);
1314 3f0549ed0c98 6921710: G1: assert(new_finger >= _finger && new_finger < _region_limit,"invariant") apetrusenko parents: 1284 diff changeset	4202 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4203 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4204 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4205 // At this point we have either completed iterating over the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4206 // region we were holding on to, or we have aborted.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4207
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4208 // We then partially drain the local queue and the global stack.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4209 // (Do we really need this?)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4210 drain_local_queue(true);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4211 drain_global_stack(true);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4212
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4213 // Read the note on the claim_region() method on why it might
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4214 // return NULL with potentially more regions available for
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4215 // claiming and why we have to check out_of_regions() to determine
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4216 // whether we're done or not.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4217 while (!has_aborted() && _curr_region == NULL && !_cm->out_of_regions()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4218 // We are going to try to claim a new region. We should have
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4219 // given up on the previous one.
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4220 // Separated the asserts so that we know which one fires.
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4221 assert(_curr_region == NULL, "invariant");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4222 assert(_finger == NULL, "invariant");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4223 assert(_region_limit == NULL, "invariant");
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4224 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4225 gclog_or_tty->print_cr("[%u] trying to claim a new region", _worker_id);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4226 }
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4227 HeapRegion* claimed_region = _cm->claim_region(_worker_id);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4228 if (claimed_region != NULL) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4229 // Yes, we managed to claim one
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4230 statsOnly( ++_regions_claimed );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4231
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4232 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4233 gclog_or_tty->print_cr("[%u] we successfully claimed "
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4234 "region "PTR_FORMAT,
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4235 _worker_id, claimed_region);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4236 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4237
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4238 setup_for_region(claimed_region);
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4239 assert(_curr_region == claimed_region, "invariant");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4240 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4241 // It is important to call the regular clock here. It might take
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4242 // a while to claim a region if, for example, we hit a large
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4243 // block of empty regions. So we need to call the regular clock
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4244 // method once round the loop to make sure it's called
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4245 // frequently enough.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4246 regular_clock_call();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4247 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4248
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4249 if (!has_aborted() && _curr_region == NULL) {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4250 assert(_cm->out_of_regions(),
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4251 "at this point we should be out of regions");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4252 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4253 } while ( _curr_region != NULL && !has_aborted());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4254
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4255 if (!has_aborted()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4256 // We cannot check whether the global stack is empty, since other
5988 2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	4257 // tasks might be pushing objects to it concurrently.
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4258 assert(_cm->out_of_regions(),
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4259 "at this point we should be out of regions");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4260
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4261 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4262 gclog_or_tty->print_cr("[%u] all regions claimed", _worker_id);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4263 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4264
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4265 // Try to reduce the number of available SATB buffers so that
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4266 // remark has less work to do.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4267 drain_satb_buffers();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4268 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4269
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4270 // Since we've done everything else, we can now totally drain the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4271 // local queue and global stack.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4272 drain_local_queue(false);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4273 drain_global_stack(false);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4274
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4275 // Attempt at work stealing from other task's queues.
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	4276 if (do_stealing && !has_aborted()) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4277 // We have not aborted. This means that we have finished all that
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4278 // we could. Let's try to do some stealing...
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4279
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4280 // We cannot check whether the global stack is empty, since other
5988 2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	4281 // tasks might be pushing objects to it concurrently.
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4282 assert(_cm->out_of_regions() && _task_queue->size() == 0,
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4283 "only way to reach here");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4284
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4285 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4286 gclog_or_tty->print_cr("[%u] starting to steal", _worker_id);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4287 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4288
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4289 while (!has_aborted()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4290 oop obj;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4291 statsOnly( ++_steal_attempts );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4292
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4293 if (_cm->try_stealing(_worker_id, &_hash_seed, obj)) {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4294 if (_cm->verbose_medium()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4295 gclog_or_tty->print_cr("[%u] stolen "PTR_FORMAT" successfully",
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4296 _worker_id, (void*) obj);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4297 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4298
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4299 statsOnly( ++_steals );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4300
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4301 assert(_nextMarkBitMap->isMarked((HeapWord*) obj),
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4302 "any stolen object should be marked");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4303 scan_object(obj);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4304
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4305 // And since we're towards the end, let's totally drain the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4306 // local queue and global stack.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4307 drain_local_queue(false);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4308 drain_global_stack(false);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4309 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4310 break;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4311 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4312 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4313 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4314
3316 cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	4315 // If we are about to wrap up and go into termination, check if we
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	4316 // should raise the overflow flag.
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	4317 if (do_termination && !has_aborted()) {
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	4318 if (_cm->force_overflow()->should_force()) {
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	4319 _cm->set_has_overflown();
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	4320 regular_clock_call();
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	4321 }
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	4322 }
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	4323
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4324 // We still haven't aborted. Now, let's try to get into the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4325 // termination protocol.
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	4326 if (do_termination && !has_aborted()) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4327 // We cannot check whether the global stack is empty, since other
5988 2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	4328 // tasks might be concurrently pushing objects on it.
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4329 // Separated the asserts so that we know which one fires.
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4330 assert(_cm->out_of_regions(), "only way to reach here");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4331 assert(_task_queue->size() == 0, "only way to reach here");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4332
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4333 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4334 gclog_or_tty->print_cr("[%u] starting termination protocol", _worker_id);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4335 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4336
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4337 _termination_start_time_ms = os::elapsedVTime() * 1000.0;
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4338
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4339 // The CMTask class also extends the TerminatorTerminator class,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4340 // hence its should_exit_termination() method will also decide
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4341 // whether to exit the termination protocol or not.
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4342 bool finished = (is_serial \|\|
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4343 _cm->terminator()->offer_termination(this));
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4344 double termination_end_time_ms = os::elapsedVTime() * 1000.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4345 _termination_time_ms +=
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4346 termination_end_time_ms - _termination_start_time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4347
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4348 if (finished) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4349 // We're all done.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4350
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4351 if (_worker_id == 0) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4352 // let's allow task 0 to do this
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4353 if (concurrent()) {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4354 assert(_cm->concurrent_marking_in_progress(), "invariant");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4355 // we need to set this to false before the next
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4356 // safepoint. This way we ensure that the marking phase
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4357 // doesn't observe any more heap expansions.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4358 _cm->clear_concurrent_marking_in_progress();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4359 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4360 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4361
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4362 // We can now guarantee that the global stack is empty, since
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4363 // all other tasks have finished. We separated the guarantees so
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4364 // that, if a condition is false, we can immediately find out
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4365 // which one.
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4366 guarantee(_cm->out_of_regions(), "only way to reach here");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4367 guarantee(_cm->mark_stack_empty(), "only way to reach here");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4368 guarantee(_task_queue->size() == 0, "only way to reach here");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4369 guarantee(!_cm->has_overflown(), "only way to reach here");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4370 guarantee(!_cm->mark_stack_overflow(), "only way to reach here");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4371
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4372 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4373 gclog_or_tty->print_cr("[%u] all tasks terminated", _worker_id);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4374 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4375 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4376 // Apparently there's more work to do. Let's abort this task. It
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4377 // will restart it and we can hopefully find more things to do.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4378
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4379 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4380 gclog_or_tty->print_cr("[%u] apparently there is more work to do",
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4381 _worker_id);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4382 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4383
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4384 set_has_aborted();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4385 statsOnly( ++_aborted_termination );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4386 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4387 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4388
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4389 // Mainly for debugging purposes to make sure that a pointer to the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4390 // closure which was statically allocated in this frame doesn't
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4391 // escape it by accident.
3771 842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	4392 set_cm_oop_closure(NULL);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4393 double end_time_ms = os::elapsedVTime() * 1000.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4394 double elapsed_time_ms = end_time_ms - _start_time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4395 // Update the step history.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4396 _step_times_ms.add(elapsed_time_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4397
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4398 if (has_aborted()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4399 // The task was aborted for some reason.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4400
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4401 statsOnly( ++_aborted );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4402
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	4403 if (_has_timed_out) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4404 double diff_ms = elapsed_time_ms - _time_target_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4405 // Keep statistics of how well we did with respect to hitting
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4406 // our target only if we actually timed out (if we aborted for
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4407 // other reasons, then the results might get skewed).
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4408 _marking_step_diffs_ms.add(diff_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4409 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4410
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4411 if (_cm->has_overflown()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4412 // This is the interesting one. We aborted because a global
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4413 // overflow was raised. This means we have to restart the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4414 // marking phase and start iterating over regions. However, in
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4415 // order to do this we have to make sure that all tasks stop
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4416 // what they are doing and re-initialise in a safe manner. We
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4417 // will achieve this with the use of two barrier sync points.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4418
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4419 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4420 gclog_or_tty->print_cr("[%u] detected overflow", _worker_id);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4421 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4422
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4423 if (!is_serial) {
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4424 // We only need to enter the sync barrier if being called
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4425 // from a parallel context
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4426 _cm->enter_first_sync_barrier(_worker_id);
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4427
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4428 // When we exit this sync barrier we know that all tasks have
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4429 // stopped doing marking work. So, it's now safe to
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4430 // re-initialise our data structures. At the end of this method,
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4431 // task 0 will clear the global data structures.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4432 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4433
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4434 statsOnly( ++_aborted_overflow );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4435
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4436 // We clear the local state of this task...
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4437 clear_region_fields();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4438
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4439 if (!is_serial) {
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4440 // ...and enter the second barrier.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4441 _cm->enter_second_sync_barrier(_worker_id);
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4442 }
8788 e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	4443 // At this point, if we're during the concurrent phase of
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	4444 // marking, everything has been re-initialized and we're
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4445 // ready to restart.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4446 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4447
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4448 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4449 gclog_or_tty->print_cr("[%u] <<<<<<<<<< ABORTING, target = %1.2lfms, "
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4450 "elapsed = %1.2lfms <<<<<<<<<<",
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4451 _worker_id, _time_target_ms, elapsed_time_ms);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4452 if (_cm->has_aborted()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4453 gclog_or_tty->print_cr("[%u] ========== MARKING ABORTED ==========",
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4454 _worker_id);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4455 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4456 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4457 } else {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4458 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4459 gclog_or_tty->print_cr("[%u] <<<<<<<<<< FINISHED, target = %1.2lfms, "
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4460 "elapsed = %1.2lfms <<<<<<<<<<",
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4461 _worker_id, _time_target_ms, elapsed_time_ms);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4462 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4463 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4464
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4465 _claimed = false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4466 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4467
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4468 CMTask::CMTask(uint worker_id,
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4469 ConcurrentMark* cm,
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	4470 size_t* marked_bytes,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	4471 BitMap* card_bm,
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4472 CMTaskQueue* task_queue,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4473 CMTaskQueueSet* task_queues)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4474 : _g1h(G1CollectedHeap::heap()),
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4475 _worker_id(worker_id), _cm(cm),
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4476 _claimed(false),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4477 _nextMarkBitMap(NULL), _hash_seed(17),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4478 _task_queue(task_queue),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4479 _task_queues(task_queues),
3771 842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	4480 _cm_oop_closure(NULL),
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	4481 _marked_bytes_array(marked_bytes),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	4482 _card_bm(card_bm) {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4483 guarantee(task_queue != NULL, "invariant");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4484 guarantee(task_queues != NULL, "invariant");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4485
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4486 statsOnly( _clock_due_to_scanning = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4487 _clock_due_to_marking = 0 );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4488
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4489 _marking_step_diffs_ms.add(0.5);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4490 }
2435 371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4491
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4492 // These are formatting macros that are used below to ensure
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4493 // consistent formatting. The _H_ versions are used to format the
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4494 // header for a particular value and they should be kept consistent
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4495 // with the corresponding macro. Also note that most of the macros add
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4496 // the necessary white space (as a prefix) which makes them a bit
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4497 // easier to compose.
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4498
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4499 // All the output lines are prefixed with this string to be able to
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4500 // identify them easily in a large log file.
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4501 #define G1PPRL_LINE_PREFIX "###"
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4502
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4503 #define G1PPRL_ADDR_BASE_FORMAT " "PTR_FORMAT"-"PTR_FORMAT
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4504 #ifdef _LP64
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4505 #define G1PPRL_ADDR_BASE_H_FORMAT " %37s"
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4506 #else // _LP64
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4507 #define G1PPRL_ADDR_BASE_H_FORMAT " %21s"
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4508 #endif // _LP64
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4509
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4510 // For per-region info
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4511 #define G1PPRL_TYPE_FORMAT " %-4s"
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4512 #define G1PPRL_TYPE_H_FORMAT " %4s"
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4513 #define G1PPRL_BYTE_FORMAT " "SIZE_FORMAT_W(9)
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4514 #define G1PPRL_BYTE_H_FORMAT " %9s"
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4515 #define G1PPRL_DOUBLE_FORMAT " %14.1f"
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4516 #define G1PPRL_DOUBLE_H_FORMAT " %14s"
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4517
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4518 // For summary info
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4519 #define G1PPRL_SUM_ADDR_FORMAT(tag) " "tag":"G1PPRL_ADDR_BASE_FORMAT
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4520 #define G1PPRL_SUM_BYTE_FORMAT(tag) " "tag": "SIZE_FORMAT
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4521 #define G1PPRL_SUM_MB_FORMAT(tag) " "tag": %1.2f MB"
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4522 #define G1PPRL_SUM_MB_PERC_FORMAT(tag) G1PPRL_SUM_MB_FORMAT(tag)" / %1.2f %%"
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4523
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4524 G1PrintRegionLivenessInfoClosure::
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4525 G1PrintRegionLivenessInfoClosure(outputStream* out, const char* phase_name)
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4526 : _out(out),
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4527 _total_used_bytes(0), _total_capacity_bytes(0),
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4528 _total_prev_live_bytes(0), _total_next_live_bytes(0),
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4529 _hum_used_bytes(0), _hum_capacity_bytes(0),
10290 05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4530 _hum_prev_live_bytes(0), _hum_next_live_bytes(0),
12080 5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4531 _total_remset_bytes(0), _total_strong_code_roots_bytes(0) {
2435 371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4532 G1CollectedHeap* g1h = G1CollectedHeap::heap();
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4533 MemRegion g1_committed = g1h->g1_committed();
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4534 MemRegion g1_reserved = g1h->g1_reserved();
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4535 double now = os::elapsedTime();
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4536
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4537 // Print the header of the output.
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4538 _out->cr();
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4539 _out->print_cr(G1PPRL_LINE_PREFIX" PHASE %s @ %1.3f", phase_name, now);
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4540 _out->print_cr(G1PPRL_LINE_PREFIX" HEAP"
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4541 G1PPRL_SUM_ADDR_FORMAT("committed")
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4542 G1PPRL_SUM_ADDR_FORMAT("reserved")
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4543 G1PPRL_SUM_BYTE_FORMAT("region-size"),
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4544 g1_committed.start(), g1_committed.end(),
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4545 g1_reserved.start(), g1_reserved.end(),
3986 65a8ff39a6da 7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t johnc parents: 3979 diff changeset	4546 HeapRegion::GrainBytes);
2435 371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4547 _out->print_cr(G1PPRL_LINE_PREFIX);
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4548 _out->print_cr(G1PPRL_LINE_PREFIX
10290 05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4549 G1PPRL_TYPE_H_FORMAT
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4550 G1PPRL_ADDR_BASE_H_FORMAT
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4551 G1PPRL_BYTE_H_FORMAT
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4552 G1PPRL_BYTE_H_FORMAT
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4553 G1PPRL_BYTE_H_FORMAT
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4554 G1PPRL_DOUBLE_H_FORMAT
12080 5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4555 G1PPRL_BYTE_H_FORMAT
10290 05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4556 G1PPRL_BYTE_H_FORMAT,
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4557 "type", "address-range",
12080 5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4558 "used", "prev-live", "next-live", "gc-eff",
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4559 "remset", "code-roots");
3977 5cc33133bc6d 7092245: G1: Wrong format specifier in G1PrintRegionLivenessInfo header output johnc parents: 3975 diff changeset	4560 _out->print_cr(G1PPRL_LINE_PREFIX
10290 05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4561 G1PPRL_TYPE_H_FORMAT
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4562 G1PPRL_ADDR_BASE_H_FORMAT
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4563 G1PPRL_BYTE_H_FORMAT
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4564 G1PPRL_BYTE_H_FORMAT
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4565 G1PPRL_BYTE_H_FORMAT
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4566 G1PPRL_DOUBLE_H_FORMAT
12080 5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4567 G1PPRL_BYTE_H_FORMAT
10290 05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4568 G1PPRL_BYTE_H_FORMAT,
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4569 "", "",
12080 5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4570 "(bytes)", "(bytes)", "(bytes)", "(bytes/ms)",
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4571 "(bytes)", "(bytes)");
2435 371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4572 }
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4573
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4574 // It takes as a parameter a reference to one of the _hum_* fields, it
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4575 // deduces the corresponding value for a region in a humongous region
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4576 // series (either the region size, or what's left if the _hum_* field
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4577 // is < the region size), and updates the _hum_* field accordingly.
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4578 size_t G1PrintRegionLivenessInfoClosure::get_hum_bytes(size_t* hum_bytes) {
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4579 size_t bytes = 0;
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4580 // The > 0 check is to deal with the prev and next live bytes which
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4581 // could be 0.
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4582 if (*hum_bytes > 0) {
3986 65a8ff39a6da 7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t johnc parents: 3979 diff changeset	4583 bytes = MIN2(HeapRegion::GrainBytes, *hum_bytes);
2435 371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4584 *hum_bytes -= bytes;
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4585 }
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4586 return bytes;
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4587 }
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4588
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4589 // It deduces the values for a region in a humongous region series
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4590 // from the _hum_* fields and updates those accordingly. It assumes
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4591 // that that _hum_* fields have already been set up from the "starts
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4592 // humongous" region and we visit the regions in address order.
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4593 void G1PrintRegionLivenessInfoClosure::get_hum_bytes(size_t* used_bytes,
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4594 size_t* capacity_bytes,
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4595 size_t* prev_live_bytes,
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4596 size_t* next_live_bytes) {
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4597 assert(_hum_used_bytes > 0 && _hum_capacity_bytes > 0, "pre-condition");
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4598 *used_bytes = get_hum_bytes(&_hum_used_bytes);
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4599 *capacity_bytes = get_hum_bytes(&_hum_capacity_bytes);
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4600 *prev_live_bytes = get_hum_bytes(&_hum_prev_live_bytes);
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4601 *next_live_bytes = get_hum_bytes(&_hum_next_live_bytes);
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4602 }
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4603
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4604 bool G1PrintRegionLivenessInfoClosure::doHeapRegion(HeapRegion* r) {
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4605 const char* type = "";
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4606 HeapWord* bottom = r->bottom();
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4607 HeapWord* end = r->end();
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4608 size_t capacity_bytes = r->capacity();
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4609 size_t used_bytes = r->used();
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4610 size_t prev_live_bytes = r->live_bytes();
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4611 size_t next_live_bytes = r->next_live_bytes();
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4612 double gc_eff = r->gc_efficiency();
10290 05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4613 size_t remset_bytes = r->rem_set()->mem_size();
12080 5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4614 size_t strong_code_roots_bytes = r->rem_set()->strong_code_roots_mem_size();
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4615
2435 371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4616 if (r->used() == 0) {
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4617 type = "FREE";
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4618 } else if (r->is_survivor()) {
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4619 type = "SURV";
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4620 } else if (r->is_young()) {
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4621 type = "EDEN";
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4622 } else if (r->startsHumongous()) {
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4623 type = "HUMS";
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4624
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4625 assert(_hum_used_bytes == 0 && _hum_capacity_bytes == 0 &&
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4626 _hum_prev_live_bytes == 0 && _hum_next_live_bytes == 0,
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4627 "they should have been zeroed after the last time we used them");
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4628 // Set up the _hum_* fields.
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4629 _hum_capacity_bytes = capacity_bytes;
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4630 _hum_used_bytes = used_bytes;
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4631 _hum_prev_live_bytes = prev_live_bytes;
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4632 _hum_next_live_bytes = next_live_bytes;
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4633 get_hum_bytes(&used_bytes, &capacity_bytes,
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4634 &prev_live_bytes, &next_live_bytes);
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4635 end = bottom + HeapRegion::GrainWords;
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4636 } else if (r->continuesHumongous()) {
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4637 type = "HUMC";
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4638 get_hum_bytes(&used_bytes, &capacity_bytes,
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4639 &prev_live_bytes, &next_live_bytes);
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4640 assert(end == bottom + HeapRegion::GrainWords, "invariant");
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4641 } else {
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4642 type = "OLD";
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4643 }
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4644
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4645 _total_used_bytes += used_bytes;
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4646 _total_capacity_bytes += capacity_bytes;
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4647 _total_prev_live_bytes += prev_live_bytes;
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4648 _total_next_live_bytes += next_live_bytes;
10290 05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4649 _total_remset_bytes += remset_bytes;
12080 5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4650 _total_strong_code_roots_bytes += strong_code_roots_bytes;
2435 371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4651
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4652 // Print a line for this particular region.
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4653 _out->print_cr(G1PPRL_LINE_PREFIX
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4654 G1PPRL_TYPE_FORMAT
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4655 G1PPRL_ADDR_BASE_FORMAT
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4656 G1PPRL_BYTE_FORMAT
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4657 G1PPRL_BYTE_FORMAT
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4658 G1PPRL_BYTE_FORMAT
10290 05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4659 G1PPRL_DOUBLE_FORMAT
12080 5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4660 G1PPRL_BYTE_FORMAT
10290 05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4661 G1PPRL_BYTE_FORMAT,
2435 371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4662 type, bottom, end,
12080 5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4663 used_bytes, prev_live_bytes, next_live_bytes, gc_eff,
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4664 remset_bytes, strong_code_roots_bytes);
2435 371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4665
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4666 return false;
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4667 }
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4668
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4669 G1PrintRegionLivenessInfoClosure::~G1PrintRegionLivenessInfoClosure() {
10290 05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4670 // add static memory usages to remembered set sizes
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4671 _total_remset_bytes += HeapRegionRemSet::fl_mem_size() + HeapRegionRemSet::static_mem_size();
2435 371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4672 // Print the footer of the output.
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4673 _out->print_cr(G1PPRL_LINE_PREFIX);
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4674 _out->print_cr(G1PPRL_LINE_PREFIX
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4675 " SUMMARY"
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4676 G1PPRL_SUM_MB_FORMAT("capacity")
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4677 G1PPRL_SUM_MB_PERC_FORMAT("used")
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4678 G1PPRL_SUM_MB_PERC_FORMAT("prev-live")
10290 05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4679 G1PPRL_SUM_MB_PERC_FORMAT("next-live")
12080 5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4680 G1PPRL_SUM_MB_FORMAT("remset")
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4681 G1PPRL_SUM_MB_FORMAT("code-roots"),
2435 371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4682 bytes_to_mb(_total_capacity_bytes),
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4683 bytes_to_mb(_total_used_bytes),
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4684 perc(_total_used_bytes, _total_capacity_bytes),
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4685 bytes_to_mb(_total_prev_live_bytes),
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4686 perc(_total_prev_live_bytes, _total_capacity_bytes),
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4687 bytes_to_mb(_total_next_live_bytes),
10290 05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4688 perc(_total_next_live_bytes, _total_capacity_bytes),
12080 5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4689 bytes_to_mb(_total_remset_bytes),
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4690 bytes_to_mb(_total_strong_code_roots_bytes));
2435 371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4691 _out->cr();
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4692 }

Mercurial > hg > truffle

annotate src/share/vm/gc_implementation/g1/concurrentMark.cpp @ 12233:40136aa2cdb1