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

annotate src/share/vm/gc_implementation/g1/concurrentMark.cpp @ 17833:bfdf528be8e8

8038498: Fix includes and C inlining after 8035330 Summary: Change 8035330: Remove G1ParScanPartialArrayClosure and G1ParScanHeapEvacClosure broke the debug build on AIX. The method do_oop_partial_array() is added in a header, but requires the inline function par_write_ref() through several inlined calls. In some cpp files, like arguments.cpp, par_write_ref() is not defined as the corresponding inline header and is not included. The AIX debug VM does not start because of the missing symbol. This change solves this by cleaning up include dependencies. Reviewed-by: tschatzl, stefank

author	tschatzl
date	Fri, 04 Apr 2014 10:43:56 +0200
parents	8ee855b4e667
children	14bd75c9dbfa

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");
13437 1de8e5356754 8029326: G1 does not check if threads gets created ehelin parents: 12316 diff changeset	556 if (_cmThread->osthread() == NULL) {
1de8e5356754 8029326: G1 does not check if threads gets created ehelin parents: 12316 diff changeset	557 vm_shutdown_during_initialization("Could not create ConcurrentMarkThread");
1de8e5356754 8029326: G1 does not check if threads gets created ehelin parents: 12316 diff changeset	558 }
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	559
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	560 assert(CGC_lock != NULL, "Where's the CGC_lock?");
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	561 assert(_markBitMap1.covers(heap_rs), "_markBitMap1 inconsistency");
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	562 assert(_markBitMap2.covers(heap_rs), "_markBitMap2 inconsistency");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	563
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	564 SATBMarkQueueSet& satb_qs = JavaThread::satb_mark_queue_set();
1282 b81f3572f355 6928059: G1: command line parameter renaming tonyp parents: 1111 diff changeset	565 satb_qs.set_buffer_size(G1SATBBufferSize);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	566
4837 eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	567 _root_regions.init(_g1h, this);
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	568
1284 5f1f51edaff6 6928081: G1: rename parameters common with CMS jmasa parents: 1282 diff changeset	569 if (ConcGCThreads > ParallelGCThreads) {
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	570 warning("Can't have more ConcGCThreads (" UINT32_FORMAT ") "
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	571 "than ParallelGCThreads (" UINT32_FORMAT ").",
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	572 ConcGCThreads, ParallelGCThreads);
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	573 return;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	574 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	575 if (ParallelGCThreads == 0) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	576 // if we are not running with any parallel GC threads we will not
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	577 // spawn any marking threads either
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	578 _parallel_marking_threads = 0;
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	579 _max_parallel_marking_threads = 0;
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	580 _sleep_factor = 0.0;
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	581 _marking_task_overhead = 1.0;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	582 } else {
8006 4700e77d44c1 8006894: G1: Number of marking threads missing from PrintFlagsFinal output johnc parents: 7450 diff changeset	583 if (!FLAG_IS_DEFAULT(ConcGCThreads) && ConcGCThreads > 0) {
4700e77d44c1 8006894: G1: Number of marking threads missing from PrintFlagsFinal output johnc parents: 7450 diff changeset	584 // Note: ConcGCThreads has precedence over G1MarkingOverheadPercent
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	585 // if both are set
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	586 _sleep_factor = 0.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	587 _marking_task_overhead = 1.0;
751 20c6f43950b5 6490395: G1: Tidy up command line flags. johnc parents: 647 diff changeset	588 } else if (G1MarkingOverheadPercent > 0) {
8006 4700e77d44c1 8006894: G1: Number of marking threads missing from PrintFlagsFinal output johnc parents: 7450 diff changeset	589 // We will calculate the number of parallel marking threads based
4700e77d44c1 8006894: G1: Number of marking threads missing from PrintFlagsFinal output johnc parents: 7450 diff changeset	590 // on a target overhead with respect to the soft real-time goal
751 20c6f43950b5 6490395: G1: Tidy up command line flags. johnc parents: 647 diff changeset	591 double marking_overhead = (double) G1MarkingOverheadPercent / 100.0;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	592 double overall_cm_overhead =
751 20c6f43950b5 6490395: G1: Tidy up command line flags. johnc parents: 647 diff changeset	593 (double) MaxGCPauseMillis * marking_overhead /
20c6f43950b5 6490395: G1: Tidy up command line flags. johnc parents: 647 diff changeset	594 (double) GCPauseIntervalMillis;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	595 double cpu_ratio = 1.0 / (double) os::processor_count();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	596 double marking_thread_num = ceil(overall_cm_overhead / cpu_ratio);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	597 double marking_task_overhead =
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	598 overall_cm_overhead / marking_thread_num *
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	599 (double) os::processor_count();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	600 double sleep_factor =
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	601 (1.0 - marking_task_overhead) / marking_task_overhead;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	602
8006 4700e77d44c1 8006894: G1: Number of marking threads missing from PrintFlagsFinal output johnc parents: 7450 diff changeset	603 FLAG_SET_ERGO(uintx, ConcGCThreads, (uint) marking_thread_num);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	604 _sleep_factor = sleep_factor;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	605 _marking_task_overhead = marking_task_overhead;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	606 } else {
8006 4700e77d44c1 8006894: G1: Number of marking threads missing from PrintFlagsFinal output johnc parents: 7450 diff changeset	607 // Calculate the number of parallel marking threads by scaling
4700e77d44c1 8006894: G1: Number of marking threads missing from PrintFlagsFinal output johnc parents: 7450 diff changeset	608 // the number of parallel GC threads.
4700e77d44c1 8006894: G1: Number of marking threads missing from PrintFlagsFinal output johnc parents: 7450 diff changeset	609 uint marking_thread_num = scale_parallel_threads((uint) ParallelGCThreads);
4700e77d44c1 8006894: G1: Number of marking threads missing from PrintFlagsFinal output johnc parents: 7450 diff changeset	610 FLAG_SET_ERGO(uintx, ConcGCThreads, marking_thread_num);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	611 _sleep_factor = 0.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	612 _marking_task_overhead = 1.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	613 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	614
8006 4700e77d44c1 8006894: G1: Number of marking threads missing from PrintFlagsFinal output johnc parents: 7450 diff changeset	615 assert(ConcGCThreads > 0, "Should have been set");
4700e77d44c1 8006894: G1: Number of marking threads missing from PrintFlagsFinal output johnc parents: 7450 diff changeset	616 _parallel_marking_threads = (uint) ConcGCThreads;
4700e77d44c1 8006894: G1: Number of marking threads missing from PrintFlagsFinal output johnc parents: 7450 diff changeset	617 _max_parallel_marking_threads = _parallel_marking_threads;
4700e77d44c1 8006894: G1: Number of marking threads missing from PrintFlagsFinal output johnc parents: 7450 diff changeset	618
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	619 if (parallel_marking_threads() > 1) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	620 _cleanup_task_overhead = 1.0;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	621 } else {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	622 _cleanup_task_overhead = marking_task_overhead();
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	623 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	624 _cleanup_sleep_factor =
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	625 (1.0 - cleanup_task_overhead()) / cleanup_task_overhead();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	626
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	627 #if 0
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	628 gclog_or_tty->print_cr("Marking Threads %d", parallel_marking_threads());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	629 gclog_or_tty->print_cr("CM Marking Task Overhead %1.4lf", marking_task_overhead());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	630 gclog_or_tty->print_cr("CM Sleep Factor %1.4lf", sleep_factor());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	631 gclog_or_tty->print_cr("CL Marking Task Overhead %1.4lf", cleanup_task_overhead());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	632 gclog_or_tty->print_cr("CL Sleep Factor %1.4lf", cleanup_sleep_factor());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	633 #endif
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	634
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	635 guarantee(parallel_marking_threads() > 0, "peace of mind");
1833 8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1719 diff changeset	636 _parallel_workers = new FlexibleWorkGang("G1 Parallel Marking Threads",
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	637 _max_parallel_marking_threads, false, true);
1833 8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1719 diff changeset	638 if (_parallel_workers == NULL) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	639 vm_exit_during_initialization("Failed necessary allocation.");
1833 8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1719 diff changeset	640 } else {
8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1719 diff changeset	641 _parallel_workers->initialize_workers();
8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1719 diff changeset	642 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	643 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	644
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	645 if (FLAG_IS_DEFAULT(MarkStackSize)) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	646 uintx mark_stack_size =
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	647 MIN2(MarkStackSizeMax,
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	648 MAX2(MarkStackSize, (uintx) (parallel_marking_threads() * TASKQUEUE_SIZE)));
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	649 // Verify that the calculated value for MarkStackSize is in range.
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	650 // It would be nice to use the private utility routine from Arguments.
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	651 if (!(mark_stack_size >= 1 && mark_stack_size <= MarkStackSizeMax)) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	652 warning("Invalid value calculated for MarkStackSize (" UINTX_FORMAT "): "
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	653 "must be between " UINTX_FORMAT " and " UINTX_FORMAT,
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	654 mark_stack_size, 1, MarkStackSizeMax);
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	655 return;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	656 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	657 FLAG_SET_ERGO(uintx, MarkStackSize, mark_stack_size);
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	658 } else {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	659 // Verify MarkStackSize is in range.
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	660 if (FLAG_IS_CMDLINE(MarkStackSize)) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	661 if (FLAG_IS_DEFAULT(MarkStackSizeMax)) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	662 if (!(MarkStackSize >= 1 && MarkStackSize <= MarkStackSizeMax)) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	663 warning("Invalid value specified for MarkStackSize (" UINTX_FORMAT "): "
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	664 "must be between " UINTX_FORMAT " and " UINTX_FORMAT,
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	665 MarkStackSize, 1, MarkStackSizeMax);
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	666 return;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	667 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	668 } else if (FLAG_IS_CMDLINE(MarkStackSizeMax)) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	669 if (!(MarkStackSize >= 1 && MarkStackSize <= MarkStackSizeMax)) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	670 warning("Invalid value specified for MarkStackSize (" UINTX_FORMAT ")"
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	671 " or for MarkStackSizeMax (" UINTX_FORMAT ")",
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	672 MarkStackSize, MarkStackSizeMax);
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	673 return;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	674 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	675 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	676 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	677 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	678
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	679 if (!_markStack.allocate(MarkStackSize)) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	680 warning("Failed to allocate CM marking stack");
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	681 return;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	682 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	683
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	684 _tasks = NEW_C_HEAP_ARRAY(CMTask*, _max_worker_id, mtGC);
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	685 _accum_task_vtime = NEW_C_HEAP_ARRAY(double, _max_worker_id, mtGC);
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	686
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	687 _count_card_bitmaps = NEW_C_HEAP_ARRAY(BitMap, _max_worker_id, mtGC);
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	688 _count_marked_bytes = NEW_C_HEAP_ARRAY(size_t*, _max_worker_id, mtGC);
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	689
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	690 BitMap::idx_t card_bm_size = _card_bm.size();
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	691
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	692 // so that the assertion in MarkingTaskQueue::task_queue doesn't fail
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	693 _active_tasks = _max_worker_id;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	694
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	695 size_t max_regions = (size_t) _g1h->max_regions();
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	696 for (uint i = 0; i < _max_worker_id; ++i) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	697 CMTaskQueue* task_queue = new CMTaskQueue();
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	698 task_queue->initialize();
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	699 _task_queues->register_queue(i, task_queue);
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	700
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	701 _count_card_bitmaps[i] = BitMap(card_bm_size, false);
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	702 _count_marked_bytes[i] = NEW_C_HEAP_ARRAY(size_t, max_regions, mtGC);
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	703
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	704 _tasks[i] = new CMTask(i, this,
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	705 _count_marked_bytes[i],
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	706 &_count_card_bitmaps[i],
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	707 task_queue, _task_queues);
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	708
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	709 _accum_task_vtime[i] = 0.0;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	710 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	711
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	712 // Calculate the card number for the bottom of the heap. Used
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	713 // in biasing indexes into the accounting card bitmaps.
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	714 _heap_bottom_card_num =
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	715 intptr_t(uintptr_t(_g1h->reserved_region().start()) >>
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	716 CardTableModRefBS::card_shift);
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	717
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	718 // Clear all the liveness counting data
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	719 clear_all_count_data();
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	720
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	721 // so that the call below can read a sensible value
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	722 _heap_start = (HeapWord*) heap_rs.base();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	723 set_non_marking_state();
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	724 _completed_initialization = true;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	725 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	726
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	727 void ConcurrentMark::update_g1_committed(bool force) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	728 // If concurrent marking is not in progress, then we do not need to
5988 2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	729 // update _heap_end.
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	730 if (!concurrent_marking_in_progress() && !force) return;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	731
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	732 MemRegion committed = _g1h->g1_committed();
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	733 assert(committed.start() == _heap_start, "start shouldn't change");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	734 HeapWord* new_end = committed.end();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	735 if (new_end > _heap_end) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	736 // The heap has been expanded.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	737
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	738 _heap_end = new_end;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	739 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	740 // Notice that the heap can also shrink. However, this only happens
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	741 // during a Full GC (at least currently) and the entire marking
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	742 // phase will bail out and the task will not be restarted. So, let's
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	743 // do nothing.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	744 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	745
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	746 void ConcurrentMark::reset() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	747 // Starting values for these two. This should be called in a STW
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	748 // phase. CM will be notified of any future g1_committed expansions
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	749 // will be at the end of evacuation pauses, when tasks are
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	750 // inactive.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	751 MemRegion committed = _g1h->g1_committed();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	752 _heap_start = committed.start();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	753 _heap_end = committed.end();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	754
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	755 // Separated the asserts so that we know which one fires.
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	756 assert(_heap_start != NULL, "heap bounds should look ok");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	757 assert(_heap_end != NULL, "heap bounds should look ok");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	758 assert(_heap_start < _heap_end, "heap bounds should look ok");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	759
7450 d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	760 // Reset all the marking data structures and any necessary flags
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	761 reset_marking_state();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	762
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	763 if (verbose_low()) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	764 gclog_or_tty->print_cr("[global] resetting");
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	765 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	766
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	767 // We do reset all of them, since different phases will use
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	768 // different number of active threads. So, it's easiest to have all
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	769 // of them ready.
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	770 for (uint i = 0; i < _max_worker_id; ++i) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	771 _tasks[i]->reset(_nextMarkBitMap);
1835 4805b9f4779e 6941395: G1: Use only lock-free versions of region stack push() and pop() johnc parents: 1833 diff changeset	772 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	773
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	774 // we need this to make sure that the flag is on during the evac
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	775 // pause with initial mark piggy-backed
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	776 set_concurrent_marking_in_progress();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	777 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	778
7450 d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	779
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	780 void ConcurrentMark::reset_marking_state(bool clear_overflow) {
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	781 _markStack.set_should_expand();
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	782 _markStack.setEmpty(); // Also clears the _markStack overflow flag
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	783 if (clear_overflow) {
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	784 clear_has_overflown();
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	785 } else {
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	786 assert(has_overflown(), "pre-condition");
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	787 }
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	788 _finger = _heap_start;
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	789
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	790 for (uint i = 0; i < _max_worker_id; ++i) {
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	791 CMTaskQueue* queue = _task_queues->queue(i);
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	792 queue->set_empty();
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	793 }
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	794 }
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	795
8788 e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	796 void ConcurrentMark::set_concurrency(uint active_tasks) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	797 assert(active_tasks <= _max_worker_id, "we should not have more");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	798
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	799 _active_tasks = active_tasks;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	800 // Need to update the three data structures below according to the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	801 // number of active threads for this phase.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	802 _terminator = ParallelTaskTerminator((int) active_tasks, _task_queues);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	803 _first_overflow_barrier_sync.set_n_workers((int) active_tasks);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	804 _second_overflow_barrier_sync.set_n_workers((int) active_tasks);
8788 e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	805 }
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	806
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	807 void ConcurrentMark::set_concurrency_and_phase(uint active_tasks, bool concurrent) {
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	808 set_concurrency(active_tasks);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	809
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	810 _concurrent = concurrent;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	811 // We propagate this to all tasks, not just the active ones.
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	812 for (uint i = 0; i < _max_worker_id; ++i)
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	813 _tasks[i]->set_concurrent(concurrent);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	814
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	815 if (concurrent) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	816 set_concurrent_marking_in_progress();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	817 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	818 // We currently assume that the concurrent flag has been set to
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	819 // false before we start remark. At this point we should also be
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	820 // in a STW phase.
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	821 assert(!concurrent_marking_in_progress(), "invariant");
8788 e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	822 assert(_finger == _heap_end,
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	823 err_msg("only way to get here: _finger: "PTR_FORMAT", _heap_end: "PTR_FORMAT,
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	824 _finger, _heap_end));
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	825 update_g1_committed(true);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	826 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	827 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	828
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	829 void ConcurrentMark::set_non_marking_state() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	830 // We set the global marking state to some default values when we're
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	831 // not doing marking.
7450 d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	832 reset_marking_state();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	833 _active_tasks = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	834 clear_concurrent_marking_in_progress();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	835 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	836
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	837 ConcurrentMark::~ConcurrentMark() {
4735 776173fc2df9 7125516: G1: ~ConcurrentMark() frees incorrectly stefank parents: 4728 diff changeset	838 // The ConcurrentMark instance is never freed.
776173fc2df9 7125516: G1: ~ConcurrentMark() frees incorrectly stefank parents: 4728 diff changeset	839 ShouldNotReachHere();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	840 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	841
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	842 void ConcurrentMark::clearNextBitmap() {
1359 23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	843 G1CollectedHeap* g1h = G1CollectedHeap::heap();
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	844 G1CollectorPolicy* g1p = g1h->g1_policy();
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	845
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	846 // Make sure that the concurrent mark thread looks to still be in
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	847 // the current cycle.
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	848 guarantee(cmThread()->during_cycle(), "invariant");
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	849
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	850 // We are finishing up the current cycle by clearing the next
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	851 // marking bitmap and getting it ready for the next cycle. During
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	852 // this time no other cycle can start. So, let's make sure that this
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	853 // is the case.
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	854 guarantee(!g1h->mark_in_progress(), "invariant");
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	855
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	856 // clear the mark bitmap (no grey objects to start with).
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	857 // We need to do this in chunks and offer to yield in between
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	858 // each chunk.
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	859 HeapWord* start = _nextMarkBitMap->startWord();
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	860 HeapWord* end = _nextMarkBitMap->endWord();
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	861 HeapWord* cur = start;
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	862 size_t chunkSize = M;
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	863 while (cur < end) {
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	864 HeapWord* next = cur + chunkSize;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	865 if (next > end) {
1359 23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	866 next = end;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	867 }
1359 23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	868 MemRegion mr(cur,next);
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	869 _nextMarkBitMap->clearRange(mr);
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	870 cur = next;
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	871 do_yield_check();
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	872
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	873 // Repeat the asserts from above. We'll do them as asserts here to
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	874 // minimize their overhead on the product. However, we'll have
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	875 // them as guarantees at the beginning / end of the bitmap
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	876 // clearing to get some checking in the product.
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	877 assert(cmThread()->during_cycle(), "invariant");
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	878 assert(!g1h->mark_in_progress(), "invariant");
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	879 }
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	880
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	881 // Clear the liveness counting data
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	882 clear_all_count_data();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	883
1359 23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	884 // Repeat the asserts from above.
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	885 guarantee(cmThread()->during_cycle(), "invariant");
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	886 guarantee(!g1h->mark_in_progress(), "invariant");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	887 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	888
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	889 class NoteStartOfMarkHRClosure: public HeapRegionClosure {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	890 public:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	891 bool doHeapRegion(HeapRegion* r) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	892 if (!r->continuesHumongous()) {
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	893 r->note_start_of_marking();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	894 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	895 return false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	896 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	897 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	898
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	899 void ConcurrentMark::checkpointRootsInitialPre() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	900 G1CollectedHeap* g1h = G1CollectedHeap::heap();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	901 G1CollectorPolicy* g1p = g1h->g1_policy();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	902
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	903 _has_aborted = false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	904
1547 fb1a39993f69 6951319: enable solaris builds using Sun Studio 12 update 1 jcoomes parents: 1388 diff changeset	905 #ifndef PRODUCT
1044 6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	906 if (G1PrintReachableAtInitialMark) {
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	907 print_reachable("at-cycle-start",
3772 6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	908 VerifyOption_G1UsePrevMarking, true /* all */);
1044 6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	909 }
1547 fb1a39993f69 6951319: enable solaris builds using Sun Studio 12 update 1 jcoomes parents: 1388 diff changeset	910 #endif
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	911
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	912 // Initialise marking structures. This has to be done in a STW phase.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	913 reset();
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	914
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	915 // For each region note start of marking.
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	916 NoteStartOfMarkHRClosure startcl;
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	917 g1h->heap_region_iterate(&startcl);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	918 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	919
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	920
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	921 void ConcurrentMark::checkpointRootsInitialPost() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	922 G1CollectedHeap* g1h = G1CollectedHeap::heap();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	923
3316 cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	924 // If we force an overflow during remark, the remark operation will
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	925 // actually abort and we'll restart concurrent marking. If we always
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	926 // force an oveflow during remark we'll never actually complete the
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	927 // marking phase. So, we initilize this here, at the start of the
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	928 // cycle, so that at the remaining overflow number will decrease at
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	929 // every remark and we'll eventually not need to cause one.
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	930 force_overflow_stw()->init();
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	931
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	932 // Start Concurrent Marking weak-reference discovery.
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	933 ReferenceProcessor* rp = g1h->ref_processor_cm();
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	934 // enable ("weak") refs discovery
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	935 rp->enable_discovery(true /verify_disabled/, true /verify_no_refs/);
457 27a80744a83b 6778647: snap(), snap_policy() should be renamed setup(), setup_policy() ysr parents: 453 diff changeset	936 rp->setup_policy(false); // snapshot the soft ref policy to be used in this cycle
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	937
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	938 SATBMarkQueueSet& satb_mq_set = JavaThread::satb_mark_queue_set();
1317 d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1314 diff changeset	939 // This is the start of the marking cycle, we're expected all
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1314 diff changeset	940 // threads to have SATB queues with active set to false.
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1314 diff changeset	941 satb_mq_set.set_active_all_threads(true, /* new active value */
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1314 diff changeset	942 false /* expected_active */);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	943
4837 eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	944 _root_regions.prepare_for_scan();
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	945
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	946 // update_g1_committed() will be called at the end of an evac pause
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	947 // when marking is on. So, it's also called at the end of the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	948 // initial-mark pause to update the heap end, if the heap expands
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	949 // during it. No need to call it here.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	950 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	951
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	952 /*
3316 cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	953 * Notice that in the next two methods, we actually leave the STS
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	954 * during the barrier sync and join it immediately afterwards. If we
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	955 * do not do this, the following deadlock can occur: one thread could
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	956 * be in the barrier sync code, waiting for the other thread to also
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	957 * sync up, whereas another one could be trying to yield, while also
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	958 * waiting for the other threads to sync up too.
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	959 *
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	960 * Note, however, that this code is also used during remark and in
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	961 * this case we should not attempt to leave / enter the STS, otherwise
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	962 * we'll either hit an asseert (debug / fastdebug) or deadlock
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	963 * (product). So we should only leave / enter the STS if we are
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	964 * operating concurrently.
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	965 *
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	966 * Because the thread that does the sync barrier has left the STS, it
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	967 * is possible to be suspended for a Full GC or an evacuation pause
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	968 * could occur. This is actually safe, since the entering the sync
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	969 * barrier is one of the last things do_marking_step() does, and it
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	970 * doesn't manipulate any data structures afterwards.
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	971 */
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	972
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	973 void ConcurrentMark::enter_first_sync_barrier(uint worker_id) {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	974 if (verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	975 gclog_or_tty->print_cr("[%u] entering first barrier", worker_id);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	976 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	977
3316 cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	978 if (concurrent()) {
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	979 ConcurrentGCThread::stsLeave();
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	980 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	981 _first_overflow_barrier_sync.enter();
3316 cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	982 if (concurrent()) {
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	983 ConcurrentGCThread::stsJoin();
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	984 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	985 // at this point everyone should have synced up and not be doing any
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	986 // more work
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	987
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	988 if (verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	989 gclog_or_tty->print_cr("[%u] leaving first barrier", worker_id);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	990 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	991
8788 e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	992 // If we're executing the concurrent phase of marking, reset the marking
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	993 // state; otherwise the marking state is reset after reference processing,
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	994 // during the remark pause.
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	995 // If we reset here as a result of an overflow during the remark we will
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	996 // see assertion failures from any subsequent set_concurrency_and_phase()
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	997 // calls.
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	998 if (concurrent()) {
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	999 // let the task associated with with worker 0 do this
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	1000 if (worker_id == 0) {
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	1001 // task 0 is responsible for clearing the global data structures
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	1002 // We should be here because of an overflow. During STW we should
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	1003 // not clear the overflow flag since we rely on it being true when
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	1004 // we exit this method to abort the pause and restart concurent
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	1005 // marking.
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	1006 reset_marking_state(true /* clear_overflow */);
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	1007 force_overflow()->update();
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	1008
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	1009 if (G1Log::fine()) {
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	1010 gclog_or_tty->date_stamp(PrintGCDateStamps);
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	1011 gclog_or_tty->stamp(PrintGCTimeStamps);
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	1012 gclog_or_tty->print_cr("[GC concurrent-mark-reset-for-overflow]");
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	1013 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1014 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1015 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1016
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1017 // after this, each task should reset its own data structures then
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1018 // then go into the second barrier
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1019 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1020
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	1021 void ConcurrentMark::enter_second_sync_barrier(uint worker_id) {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	1022 if (verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	1023 gclog_or_tty->print_cr("[%u] entering second barrier", worker_id);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	1024 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1025
3316 cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1026 if (concurrent()) {
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1027 ConcurrentGCThread::stsLeave();
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1028 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1029 _second_overflow_barrier_sync.enter();
3316 cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1030 if (concurrent()) {
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1031 ConcurrentGCThread::stsJoin();
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1032 }
8788 e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	1033 // at this point everything should be re-initialized and ready to go
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1034
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	1035 if (verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	1036 gclog_or_tty->print_cr("[%u] leaving second barrier", worker_id);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	1037 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1038 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1039
3316 cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1040 #ifndef PRODUCT
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1041 void ForceOverflowSettings::init() {
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1042 _num_remaining = G1ConcMarkForceOverflow;
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1043 _force = false;
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1044 update();
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1045 }
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1046
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1047 void ForceOverflowSettings::update() {
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1048 if (_num_remaining > 0) {
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1049 _num_remaining -= 1;
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1050 _force = true;
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1051 } else {
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1052 _force = false;
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1053 }
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1054 }
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1055
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1056 bool ForceOverflowSettings::should_force() {
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1057 if (_force) {
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1058 _force = false;
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1059 return true;
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1060 } else {
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1061 return false;
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1062 }
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1063 }
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1064 #endif // !PRODUCT
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1065
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1066 class CMConcurrentMarkingTask: public AbstractGangTask {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1067 private:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1068 ConcurrentMark* _cm;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1069 ConcurrentMarkThread* _cmt;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1070
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1071 public:
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1072 void work(uint worker_id) {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	1073 assert(Thread::current()->is_ConcurrentGC_thread(),
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	1074 "this should only be done by a conc GC thread");
1974 fd1d227ef1b9 6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent johnc parents: 1972 diff changeset	1075 ResourceMark rm;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1076
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1077 double start_vtime = os::elapsedVTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1078
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1079 ConcurrentGCThread::stsJoin();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1080
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1081 assert(worker_id < _cm->active_tasks(), "invariant");
441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1082 CMTask* the_task = _cm->task(worker_id);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1083 the_task->record_start_time();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1084 if (!_cm->has_aborted()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1085 do {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1086 double start_vtime_sec = os::elapsedVTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1087 double start_time_sec = os::elapsedTime();
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	1088 double mark_step_duration_ms = G1ConcMarkStepDurationMillis;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	1089
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	1090 the_task->do_marking_step(mark_step_duration_ms,
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	1091 true /* do_termination */,
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	1092 false /* is_serial*/);
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	1093
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1094 double end_time_sec = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1095 double end_vtime_sec = os::elapsedVTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1096 double elapsed_vtime_sec = end_vtime_sec - start_vtime_sec;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1097 double elapsed_time_sec = end_time_sec - start_time_sec;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1098 _cm->clear_has_overflown();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1099
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1100 bool ret = _cm->do_yield_check(worker_id);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1101
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1102 jlong sleep_time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1103 if (!_cm->has_aborted() && the_task->has_aborted()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1104 sleep_time_ms =
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1105 (jlong) (elapsed_vtime_sec * _cm->sleep_factor() * 1000.0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1106 ConcurrentGCThread::stsLeave();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1107 os::sleep(Thread::current(), sleep_time_ms, false);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1108 ConcurrentGCThread::stsJoin();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1109 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1110 double end_time2_sec = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1111 double elapsed_time2_sec = end_time2_sec - start_time_sec;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1112
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1113 #if 0
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1114 gclog_or_tty->print_cr("CM: elapsed %1.4lf ms, sleep %1.4lf ms, "
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1115 "overhead %1.4lf",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1116 elapsed_vtime_sec * 1000.0, (double) sleep_time_ms,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1117 the_task->conc_overhead(os::elapsedTime()) * 8.0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1118 gclog_or_tty->print_cr("elapsed time %1.4lf ms, time 2: %1.4lf ms",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1119 elapsed_time_sec * 1000.0, elapsed_time2_sec * 1000.0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1120 #endif
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1121 } while (!_cm->has_aborted() && the_task->has_aborted());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1122 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1123 the_task->record_end_time();
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	1124 guarantee(!the_task->has_aborted() \|\| _cm->has_aborted(), "invariant");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1125
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1126 ConcurrentGCThread::stsLeave();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1127
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1128 double end_vtime = os::elapsedVTime();
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1129 _cm->update_accum_task_vtime(worker_id, end_vtime - start_vtime);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1130 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1131
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1132 CMConcurrentMarkingTask(ConcurrentMark* cm,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1133 ConcurrentMarkThread* cmt) :
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1134 AbstractGangTask("Concurrent Mark"), _cm(cm), _cmt(cmt) { }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1135
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1136 ~CMConcurrentMarkingTask() { }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1137 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1138
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1139 // Calculates the number of active workers for a concurrent
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1140 // phase.
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1141 uint ConcurrentMark::calc_parallel_marking_threads() {
4711 adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	1142 if (G1CollectedHeap::use_parallel_gc_threads()) {
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1143 uint n_conc_workers = 0;
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1144 if (!UseDynamicNumberOfGCThreads \|\|
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1145 (!FLAG_IS_DEFAULT(ConcGCThreads) &&
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1146 !ForceDynamicNumberOfGCThreads)) {
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1147 n_conc_workers = max_parallel_marking_threads();
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1148 } else {
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1149 n_conc_workers =
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1150 AdaptiveSizePolicy::calc_default_active_workers(
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1151 max_parallel_marking_threads(),
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1152 1, /* Minimum workers */
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1153 parallel_marking_threads(),
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1154 Threads::number_of_non_daemon_threads());
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1155 // Don't scale down "n_conc_workers" by scale_parallel_threads() because
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1156 // that scaling has already gone into "_max_parallel_marking_threads".
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1157 }
4711 adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	1158 assert(n_conc_workers > 0, "Always need at least 1");
adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	1159 return n_conc_workers;
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1160 }
4711 adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	1161 // If we are not running with any parallel GC threads we will not
adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	1162 // have spawned any marking threads either. Hence the number of
adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	1163 // concurrent workers should be 0.
adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	1164 return 0;
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1165 }
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1166
4837 eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1167 void ConcurrentMark::scanRootRegion(HeapRegion* hr, uint worker_id) {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1168 // Currently, only survivors can be root regions.
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1169 assert(hr->next_top_at_mark_start() == hr->bottom(), "invariant");
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1170 G1RootRegionScanClosure cl(_g1h, this, worker_id);
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1171
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1172 const uintx interval = PrefetchScanIntervalInBytes;
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1173 HeapWord* curr = hr->bottom();
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1174 const HeapWord* end = hr->top();
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1175 while (curr < end) {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1176 Prefetch::read(curr, interval);
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1177 oop obj = oop(curr);
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1178 int size = obj->oop_iterate(&cl);
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1179 assert(size == obj->size(), "sanity");
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1180 curr += size;
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1181 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1182 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1183
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1184 class CMRootRegionScanTask : public AbstractGangTask {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1185 private:
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1186 ConcurrentMark* _cm;
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1187
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1188 public:
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1189 CMRootRegionScanTask(ConcurrentMark* cm) :
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1190 AbstractGangTask("Root Region Scan"), _cm(cm) { }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1191
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1192 void work(uint worker_id) {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1193 assert(Thread::current()->is_ConcurrentGC_thread(),
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1194 "this should only be done by a conc GC thread");
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1195
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1196 CMRootRegions* root_regions = _cm->root_regions();
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1197 HeapRegion* hr = root_regions->claim_next();
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1198 while (hr != NULL) {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1199 _cm->scanRootRegion(hr, worker_id);
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1200 hr = root_regions->claim_next();
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1201 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1202 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1203 };
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1204
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1205 void ConcurrentMark::scanRootRegions() {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1206 // scan_in_progress() will have been set to true only if there was
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1207 // at least one root region to scan. So, if it's false, we
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1208 // should not attempt to do any further work.
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1209 if (root_regions()->scan_in_progress()) {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1210 _parallel_marking_threads = calc_parallel_marking_threads();
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1211 assert(parallel_marking_threads() <= max_parallel_marking_threads(),
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1212 "Maximum number of marking threads exceeded");
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1213 uint active_workers = MAX2(1U, parallel_marking_threads());
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1214
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1215 CMRootRegionScanTask task(this);
8008 256d3f43c177 8005875: G1: Kitchensink fails with ParallelGCThreads=0 johnc parents: 8006 diff changeset	1216 if (use_parallel_marking_threads()) {
4837 eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1217 _parallel_workers->set_active_workers((int) active_workers);
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1218 _parallel_workers->run_task(&task);
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1219 } else {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1220 task.work(0);
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1221 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1222
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1223 // It's possible that has_aborted() is true here without actually
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1224 // aborting the survivor scan earlier. This is OK as it's
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1225 // mainly used for sanity checking.
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1226 root_regions()->scan_finished();
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1227 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1228 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1229
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1230 void ConcurrentMark::markFromRoots() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1231 // we might be tempted to assert that:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1232 // assert(asynch == !SafepointSynchronize::is_at_safepoint(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1233 // "inconsistent argument?");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1234 // However that wouldn't be right, because it's possible that
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1235 // a safepoint is indeed in progress as a younger generation
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1236 // stop-the-world GC happens even as we mark in this generation.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1237
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1238 _restart_for_overflow = false;
3316 cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1239 force_overflow_conc()->init();
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1240
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1241 // _g1h has _n_par_threads
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1242 _parallel_marking_threads = calc_parallel_marking_threads();
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1243 assert(parallel_marking_threads() <= max_parallel_marking_threads(),
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1244 "Maximum number of marking threads exceeded");
4711 adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	1245
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1246 uint active_workers = MAX2(1U, parallel_marking_threads());
4711 adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	1247
8788 e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	1248 // Parallel task terminator is set in "set_concurrency_and_phase()"
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	1249 set_concurrency_and_phase(active_workers, true /* concurrent */);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1250
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1251 CMConcurrentMarkingTask markingTask(this, cmThread());
8008 256d3f43c177 8005875: G1: Kitchensink fails with ParallelGCThreads=0 johnc parents: 8006 diff changeset	1252 if (use_parallel_marking_threads()) {
4711 adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	1253 _parallel_workers->set_active_workers((int)active_workers);
adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	1254 // Don't set _n_par_threads because it affects MT in proceess_strong_roots()
adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	1255 // and the decisions on that MT processing is made elsewhere.
adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	1256 assert(_parallel_workers->active_workers() > 0, "Should have been set");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1257 _parallel_workers->run_task(&markingTask);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	1258 } else {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1259 markingTask.work(0);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	1260 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1261 print_stats();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1262 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1263
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1264 void ConcurrentMark::checkpointRootsFinal(bool clear_all_soft_refs) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1265 // world is stopped at this checkpoint
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1266 assert(SafepointSynchronize::is_at_safepoint(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1267 "world should be stopped");
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	1268
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1269 G1CollectedHeap* g1h = G1CollectedHeap::heap();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1270
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1271 // If a full collection has happened, we shouldn't do this.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1272 if (has_aborted()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1273 g1h->set_marking_complete(); // So bitmap clearing isn't confused
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1274 return;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1275 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1276
2125 7246a374a9f2 6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent kamg parents: 2037 diff changeset	1277 SvcGCMarker sgcm(SvcGCMarker::OTHER);
7246a374a9f2 6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent kamg parents: 2037 diff changeset	1278
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	1279 if (VerifyDuringGC) {
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	1280 HandleMark hm; // handle scope
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	1281 Universe::heap()->prepare_for_verify();
10186 b06ac540229e 8013132: Add a flag to turn off the output of the verbose verification code stefank parents: 9076 diff changeset	1282 Universe::verify(VerifyOption_G1UsePrevMarking,
b06ac540229e 8013132: Add a flag to turn off the output of the verbose verification code stefank parents: 9076 diff changeset	1283 " VerifyDuringGC:(before)");
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	1284 }
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	1285
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1286 G1CollectorPolicy* g1p = g1h->g1_policy();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1287 g1p->record_concurrent_mark_remark_start();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1288
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1289 double start = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1290
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1291 checkpointRootsFinalWork();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1292
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1293 double mark_work_end = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1294
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1295 weakRefsWork(clear_all_soft_refs);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1296
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1297 if (has_overflown()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1298 // Oops. We overflowed. Restart concurrent marking.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1299 _restart_for_overflow = true;
8789 1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure johnc parents: 8788 diff changeset	1300 if (G1TraceMarkStackOverflow) {
1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure johnc parents: 8788 diff changeset	1301 gclog_or_tty->print_cr("\nRemark led to restart for overflow.");
1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure johnc parents: 8788 diff changeset	1302 }
1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure johnc parents: 8788 diff changeset	1303
1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure johnc parents: 8788 diff changeset	1304 // Verify the heap w.r.t. the previous marking bitmap.
1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure johnc parents: 8788 diff changeset	1305 if (VerifyDuringGC) {
1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure johnc parents: 8788 diff changeset	1306 HandleMark hm; // handle scope
1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure johnc parents: 8788 diff changeset	1307 Universe::heap()->prepare_for_verify();
10186 b06ac540229e 8013132: Add a flag to turn off the output of the verbose verification code stefank parents: 9076 diff changeset	1308 Universe::verify(VerifyOption_G1UsePrevMarking,
b06ac540229e 8013132: Add a flag to turn off the output of the verbose verification code stefank parents: 9076 diff changeset	1309 " VerifyDuringGC:(overflow)");
8789 1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure johnc parents: 8788 diff changeset	1310 }
1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure johnc parents: 8788 diff changeset	1311
7450 d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	1312 // Clear the marking state because we will be restarting
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	1313 // marking due to overflowing the global mark stack.
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	1314 reset_marking_state();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1315 } else {
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1316 // Aggregate the per-task counting data that we have accumulated
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1317 // while marking.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1318 aggregate_count_data();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1319
2149 7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 2125 diff changeset	1320 SATBMarkQueueSet& satb_mq_set = JavaThread::satb_mark_queue_set();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1321 // We're done with marking.
1317 d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1314 diff changeset	1322 // This is the end of the marking cycle, we're expected all
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1314 diff changeset	1323 // threads to have SATB queues with active set to true.
2149 7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 2125 diff changeset	1324 satb_mq_set.set_active_all_threads(false, /* new active value */
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 2125 diff changeset	1325 true /* expected_active */);
811 830ca2573896 6850846: G1: extend G1 marking verification tonyp parents: 751 diff changeset	1326
830ca2573896 6850846: G1: extend G1 marking verification tonyp parents: 751 diff changeset	1327 if (VerifyDuringGC) {
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	1328 HandleMark hm; // handle scope
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	1329 Universe::heap()->prepare_for_verify();
10186 b06ac540229e 8013132: Add a flag to turn off the output of the verbose verification code stefank parents: 9076 diff changeset	1330 Universe::verify(VerifyOption_G1UseNextMarking,
b06ac540229e 8013132: Add a flag to turn off the output of the verbose verification code stefank parents: 9076 diff changeset	1331 " VerifyDuringGC:(after)");
811 830ca2573896 6850846: G1: extend G1 marking verification tonyp parents: 751 diff changeset	1332 }
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	1333 assert(!restart_for_overflow(), "sanity");
7450 d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	1334 // Completely reset the marking state since marking completed
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	1335 set_non_marking_state();
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	1336 }
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	1337
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	1338 // Expand the marking stack, if we have to and if we can.
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	1339 if (_markStack.should_expand()) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	1340 _markStack.expand();
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	1341 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	1342
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1343 // Statistics
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1344 double now = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1345 _remark_mark_times.add((mark_work_end - start) * 1000.0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1346 _remark_weak_ref_times.add((now - mark_work_end) * 1000.0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1347 _remark_times.add((now - start) * 1000.0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1348
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1349 g1p->record_concurrent_mark_remark_end();
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	1350
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	1351 G1CMIsAliveClosure is_alive(g1h);
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	1352 g1h->gc_tracer_cm()->report_object_count_after_gc(&is_alive);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1353 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1354
6027 8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1355 // Base class of the closures that finalize and verify the
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1356 // liveness counting data.
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1357 class CMCountDataClosureBase: public HeapRegionClosure {
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1358 protected:
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1359 G1CollectedHeap* _g1h;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1360 ConcurrentMark* _cm;
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1361 CardTableModRefBS* _ct_bs;
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1362
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1363 BitMap* _region_bm;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1364 BitMap* _card_bm;
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1365
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1366 // Takes a region that's not empty (i.e., it has at least one
829 30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1367 // live object in it and sets its corresponding bit on the region
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1368 // bitmap to 1. If the region is "starts humongous" it will also set
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1369 // to 1 the bits on the region bitmap that correspond to its
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1370 // associated "continues humongous" regions.
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1371 void set_bit_for_region(HeapRegion* hr) {
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1372 assert(!hr->continuesHumongous(), "should have filtered those out");
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1373
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	1374 BitMap::idx_t index = (BitMap::idx_t) hr->hrs_index();
829 30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1375 if (!hr->startsHumongous()) {
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1376 // Normal (non-humongous) case: just set the bit.
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	1377 _region_bm->par_at_put(index, true);
829 30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1378 } else {
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1379 // Starts humongous case: calculate how many regions are part of
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1380 // this humongous region and then set the bit range.
6254 a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1381 BitMap::idx_t end_index = (BitMap::idx_t) hr->last_hc_index();
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	1382 _region_bm->par_at_put_range(index, end_index, true);
829 30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1383 }
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1384 }
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1385
6027 8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1386 public:
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1387 CMCountDataClosureBase(G1CollectedHeap* g1h,
6027 8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1388 BitMap* region_bm, BitMap* card_bm):
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1389 _g1h(g1h), _cm(g1h->concurrent_mark()),
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1390 _ct_bs((CardTableModRefBS*) (g1h->barrier_set())),
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1391 _region_bm(region_bm), _card_bm(card_bm) { }
6027 8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1392 };
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1393
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1394 // Closure that calculates the # live objects per region. Used
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1395 // for verification purposes during the cleanup pause.
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1396 class CalcLiveObjectsClosure: public CMCountDataClosureBase {
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1397 CMBitMapRO* _bm;
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1398 size_t _region_marked_bytes;
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1399
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1400 public:
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1401 CalcLiveObjectsClosure(CMBitMapRO bm, G1CollectedHeap g1h,
6027 8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1402 BitMap* region_bm, BitMap* card_bm) :
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1403 CMCountDataClosureBase(g1h, region_bm, card_bm),
6027 8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1404 _bm(bm), _region_marked_bytes(0) { }
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1405
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1406 bool doHeapRegion(HeapRegion* hr) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1407
639 922c573ea67d 6815683: G1: SEGV during marking iveresov parents: 619 diff changeset	1408 if (hr->continuesHumongous()) {
829 30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1409 // We will ignore these here and process them when their
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1410 // associated "starts humongous" region is processed (see
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1411 // set_bit_for_heap_region()). Note that we cannot rely on their
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1412 // associated "starts humongous" region to have their bit set to
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1413 // 1 since, due to the region chunking in the parallel region
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1414 // iteration, a "continues humongous" region might be visited
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1415 // before its associated "starts humongous".
639 922c573ea67d 6815683: G1: SEGV during marking iveresov parents: 619 diff changeset	1416 return false;
922c573ea67d 6815683: G1: SEGV during marking iveresov parents: 619 diff changeset	1417 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1418
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1419 HeapWord* ntams = hr->next_top_at_mark_start();
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1420 HeapWord* start = hr->bottom();
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1421
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1422 assert(start <= hr->end() && start <= ntams && ntams <= hr->end(),
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1423 err_msg("Preconditions not met - "
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1424 "start: "PTR_FORMAT", ntams: "PTR_FORMAT", end: "PTR_FORMAT,
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1425 start, ntams, hr->end()));
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1426
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1427 // Find the first marked object at or after "start".
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1428 start = _bm->getNextMarkedWordAddress(start, ntams);
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1429
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1430 size_t marked_bytes = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1431
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1432 while (start < ntams) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1433 oop obj = oop(start);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1434 int obj_sz = obj->size();
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1435 HeapWord* obj_end = start + obj_sz;
6027 8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1436
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1437 BitMap::idx_t start_idx = _cm->card_bitmap_index_for(start);
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1438 BitMap::idx_t end_idx = _cm->card_bitmap_index_for(obj_end);
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1439
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1440 // Note: if we're looking at the last region in heap - obj_end
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1441 // could be actually just beyond the end of the heap; end_idx
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1442 // will then correspond to a (non-existent) card that is also
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1443 // just beyond the heap.
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1444 if (_g1h->is_in_g1_reserved(obj_end) && !_ct_bs->is_card_aligned(obj_end)) {
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1445 // end of object is not card aligned - increment to cover
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1446 // all the cards spanned by the object
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1447 end_idx += 1;
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1448 }
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1449
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1450 // Set the bits in the card BM for the cards spanned by this object.
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1451 _cm->set_card_bitmap_range(_card_bm, start_idx, end_idx, true /* is_par */);
6027 8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1452
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1453 // Add the size of this object to the number of marked bytes.
1030 dfdaf65c3423 6858886: G1: guarantee(_next_marked_bytes <= used(),"invariant") at heapRegion.hpp:359 apetrusenko parents: 1023 diff changeset	1454 marked_bytes += (size_t)obj_sz * HeapWordSize;
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1455
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1456 // Find the next marked object after this one.
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1457 start = _bm->getNextMarkedWordAddress(obj_end, ntams);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	1458 }
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1459
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1460 // Mark the allocated-since-marking portion...
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1461 HeapWord* top = hr->top();
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1462 if (ntams < top) {
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1463 BitMap::idx_t start_idx = _cm->card_bitmap_index_for(ntams);
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1464 BitMap::idx_t end_idx = _cm->card_bitmap_index_for(top);
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1465
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1466 // Note: if we're looking at the last region in heap - top
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1467 // could be actually just beyond the end of the heap; end_idx
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1468 // will then correspond to a (non-existent) card that is also
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1469 // just beyond the heap.
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1470 if (_g1h->is_in_g1_reserved(top) && !_ct_bs->is_card_aligned(top)) {
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1471 // end of object is not card aligned - increment to cover
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1472 // all the cards spanned by the object
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1473 end_idx += 1;
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1474 }
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1475 _cm->set_card_bitmap_range(_card_bm, start_idx, end_idx, true /* is_par */);
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1476
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1477 // This definitely means the region has live objects.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1478 set_bit_for_region(hr);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1479 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1480
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1481 // Update the live region bitmap.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1482 if (marked_bytes > 0) {
829 30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1483 set_bit_for_region(hr);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1484 }
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1485
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1486 // Set the marked bytes for the current region so that
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1487 // it can be queried by a calling verificiation routine
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1488 _region_marked_bytes = marked_bytes;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1489
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1490 return false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1491 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1492
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1493 size_t region_marked_bytes() const { return _region_marked_bytes; }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1494 };
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1495
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1496 // Heap region closure used for verifying the counting data
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1497 // that was accumulated concurrently and aggregated during
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1498 // the remark pause. This closure is applied to the heap
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1499 // regions during the STW cleanup pause.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1500
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1501 class VerifyLiveObjectDataHRClosure: public HeapRegionClosure {
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1502 G1CollectedHeap* _g1h;
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1503 ConcurrentMark* _cm;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1504 CalcLiveObjectsClosure _calc_cl;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1505 BitMap* _region_bm; // Region BM to be verified
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1506 BitMap* _card_bm; // Card BM to be verified
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1507 bool _verbose; // verbose output?
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1508
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1509 BitMap* _exp_region_bm; // Expected Region BM values
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1510 BitMap* _exp_card_bm; // Expected card BM values
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1511
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1512 int _failures;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1513
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1514 public:
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1515 VerifyLiveObjectDataHRClosure(G1CollectedHeap* g1h,
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1516 BitMap* region_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1517 BitMap* card_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1518 BitMap* exp_region_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1519 BitMap* exp_card_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1520 bool verbose) :
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1521 _g1h(g1h), _cm(g1h->concurrent_mark()),
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1522 _calc_cl(_cm->nextMarkBitMap(), g1h, exp_region_bm, exp_card_bm),
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1523 _region_bm(region_bm), _card_bm(card_bm), _verbose(verbose),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1524 _exp_region_bm(exp_region_bm), _exp_card_bm(exp_card_bm),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1525 _failures(0) { }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1526
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1527 int failures() const { return _failures; }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1528
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1529 bool doHeapRegion(HeapRegion* hr) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1530 if (hr->continuesHumongous()) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1531 // We will ignore these here and process them when their
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1532 // associated "starts humongous" region is processed (see
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1533 // set_bit_for_heap_region()). Note that we cannot rely on their
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1534 // associated "starts humongous" region to have their bit set to
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1535 // 1 since, due to the region chunking in the parallel region
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1536 // iteration, a "continues humongous" region might be visited
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1537 // before its associated "starts humongous".
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1538 return false;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1539 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1540
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1541 int failures = 0;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1542
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1543 // Call the CalcLiveObjectsClosure to walk the marking bitmap for
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1544 // this region and set the corresponding bits in the expected region
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1545 // and card bitmaps.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1546 bool res = _calc_cl.doHeapRegion(hr);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1547 assert(res == false, "should be continuing");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1548
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1549 MutexLockerEx x((_verbose ? ParGCRareEvent_lock : NULL),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1550 Mutex::_no_safepoint_check_flag);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1551
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1552 // Verify the marked bytes for this region.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1553 size_t exp_marked_bytes = _calc_cl.region_marked_bytes();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1554 size_t act_marked_bytes = hr->next_marked_bytes();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1555
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1556 // We're not OK if expected marked bytes > actual marked bytes. It means
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1557 // we have missed accounting some objects during the actual marking.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1558 if (exp_marked_bytes > act_marked_bytes) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1559 if (_verbose) {
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	1560 gclog_or_tty->print_cr("Region %u: marked bytes mismatch: "
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1561 "expected: " SIZE_FORMAT ", actual: " SIZE_FORMAT,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1562 hr->hrs_index(), exp_marked_bytes, act_marked_bytes);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1563 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1564 failures += 1;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1565 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1566
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1567 // Verify the bit, for this region, in the actual and expected
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1568 // (which was just calculated) region bit maps.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1569 // We're not OK if the bit in the calculated expected region
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1570 // bitmap is set and the bit in the actual region bitmap is not.
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	1571 BitMap::idx_t index = (BitMap::idx_t) hr->hrs_index();
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1572
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1573 bool expected = _exp_region_bm->at(index);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1574 bool actual = _region_bm->at(index);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1575 if (expected && !actual) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1576 if (_verbose) {
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	1577 gclog_or_tty->print_cr("Region %u: region bitmap mismatch: "
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	1578 "expected: %s, actual: %s",
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	1579 hr->hrs_index(),
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	1580 BOOL_TO_STR(expected), BOOL_TO_STR(actual));
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1581 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1582 failures += 1;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1583 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1584
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1585 // Verify that the card bit maps for the cards spanned by the current
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1586 // region match. We have an error if we have a set bit in the expected
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1587 // bit map and the corresponding bit in the actual bitmap is not set.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1588
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1589 BitMap::idx_t start_idx = _cm->card_bitmap_index_for(hr->bottom());
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1590 BitMap::idx_t end_idx = _cm->card_bitmap_index_for(hr->top());
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1591
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1592 for (BitMap::idx_t i = start_idx; i < end_idx; i+=1) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1593 expected = _exp_card_bm->at(i);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1594 actual = _card_bm->at(i);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1595
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1596 if (expected && !actual) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1597 if (_verbose) {
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	1598 gclog_or_tty->print_cr("Region %u: card bitmap mismatch at " SIZE_FORMAT ": "
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	1599 "expected: %s, actual: %s",
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	1600 hr->hrs_index(), i,
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	1601 BOOL_TO_STR(expected), BOOL_TO_STR(actual));
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1602 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1603 failures += 1;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1604 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1605 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1606
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1607 if (failures > 0 && _verbose) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1608 gclog_or_tty->print_cr("Region " HR_FORMAT ", ntams: " PTR_FORMAT ", "
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1609 "marked_bytes: calc/actual " SIZE_FORMAT "/" SIZE_FORMAT,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1610 HR_FORMAT_PARAMS(hr), hr->next_top_at_mark_start(),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1611 _calc_cl.region_marked_bytes(), hr->next_marked_bytes());
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1612 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1613
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1614 _failures += failures;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1615
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1616 // We could stop iteration over the heap when we
6027 8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1617 // find the first violating region by returning true.
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1618 return false;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1619 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1620 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1621
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1622 class G1ParVerifyFinalCountTask: public AbstractGangTask {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1623 protected:
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1624 G1CollectedHeap* _g1h;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1625 ConcurrentMark* _cm;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1626 BitMap* _actual_region_bm;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1627 BitMap* _actual_card_bm;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1628
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1629 uint _n_workers;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1630
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1631 BitMap* _expected_region_bm;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1632 BitMap* _expected_card_bm;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1633
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1634 int _failures;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1635 bool _verbose;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1636
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1637 public:
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1638 G1ParVerifyFinalCountTask(G1CollectedHeap* g1h,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1639 BitMap* region_bm, BitMap* card_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1640 BitMap* expected_region_bm, BitMap* expected_card_bm)
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1641 : AbstractGangTask("G1 verify final counting"),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1642 _g1h(g1h), _cm(_g1h->concurrent_mark()),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1643 _actual_region_bm(region_bm), _actual_card_bm(card_bm),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1644 _expected_region_bm(expected_region_bm), _expected_card_bm(expected_card_bm),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1645 _failures(0), _verbose(false),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1646 _n_workers(0) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1647 assert(VerifyDuringGC, "don't call this otherwise");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1648
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1649 // Use the value already set as the number of active threads
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1650 // in the call to run_task().
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1651 if (G1CollectedHeap::use_parallel_gc_threads()) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1652 assert( _g1h->workers()->active_workers() > 0,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1653 "Should have been previously set");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1654 _n_workers = _g1h->workers()->active_workers();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1655 } else {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1656 _n_workers = 1;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1657 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1658
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1659 assert(_expected_card_bm->size() == _actual_card_bm->size(), "sanity");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1660 assert(_expected_region_bm->size() == _actual_region_bm->size(), "sanity");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1661
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1662 _verbose = _cm->verbose_medium();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1663 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1664
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1665 void work(uint worker_id) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1666 assert(worker_id < _n_workers, "invariant");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1667
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1668 VerifyLiveObjectDataHRClosure verify_cl(_g1h,
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1669 _actual_region_bm, _actual_card_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1670 _expected_region_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1671 _expected_card_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1672 _verbose);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1673
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1674 if (G1CollectedHeap::use_parallel_gc_threads()) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1675 _g1h->heap_region_par_iterate_chunked(&verify_cl,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1676 worker_id,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1677 _n_workers,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1678 HeapRegion::VerifyCountClaimValue);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1679 } else {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1680 _g1h->heap_region_iterate(&verify_cl);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1681 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1682
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1683 Atomic::add(verify_cl.failures(), &_failures);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1684 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1685
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1686 int failures() const { return _failures; }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1687 };
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1688
6027 8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1689 // Closure that finalizes the liveness counting data.
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1690 // Used during the cleanup pause.
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1691 // Sets the bits corresponding to the interval [NTAMS, top]
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1692 // (which contains the implicitly live objects) in the
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1693 // card liveness bitmap. Also sets the bit for each region,
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1694 // containing live data, in the region liveness bitmap.
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1695
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1696 class FinalCountDataUpdateClosure: public CMCountDataClosureBase {
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1697 public:
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1698 FinalCountDataUpdateClosure(G1CollectedHeap* g1h,
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1699 BitMap* region_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1700 BitMap* card_bm) :
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1701 CMCountDataClosureBase(g1h, region_bm, card_bm) { }
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1702
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1703 bool doHeapRegion(HeapRegion* hr) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1704
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1705 if (hr->continuesHumongous()) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1706 // We will ignore these here and process them when their
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1707 // associated "starts humongous" region is processed (see
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1708 // set_bit_for_heap_region()). Note that we cannot rely on their
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1709 // associated "starts humongous" region to have their bit set to
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1710 // 1 since, due to the region chunking in the parallel region
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1711 // iteration, a "continues humongous" region might be visited
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1712 // before its associated "starts humongous".
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1713 return false;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1714 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1715
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1716 HeapWord* ntams = hr->next_top_at_mark_start();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1717 HeapWord* top = hr->top();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1718
6027 8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1719 assert(hr->bottom() <= ntams && ntams <= hr->end(), "Preconditions.");
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1720
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1721 // Mark the allocated-since-marking portion...
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1722 if (ntams < top) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1723 // This definitely means the region has live objects.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1724 set_bit_for_region(hr);
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1725
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1726 // Now set the bits in the card bitmap for [ntams, top)
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1727 BitMap::idx_t start_idx = _cm->card_bitmap_index_for(ntams);
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1728 BitMap::idx_t end_idx = _cm->card_bitmap_index_for(top);
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1729
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1730 // Note: if we're looking at the last region in heap - top
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1731 // could be actually just beyond the end of the heap; end_idx
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1732 // will then correspond to a (non-existent) card that is also
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1733 // just beyond the heap.
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1734 if (_g1h->is_in_g1_reserved(top) && !_ct_bs->is_card_aligned(top)) {
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1735 // end of object is not card aligned - increment to cover
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1736 // all the cards spanned by the object
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1737 end_idx += 1;
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1738 }
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1739
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1740 assert(end_idx <= _card_bm->size(),
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1741 err_msg("oob: end_idx= "SIZE_FORMAT", bitmap size= "SIZE_FORMAT,
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1742 end_idx, _card_bm->size()));
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1743 assert(start_idx < _card_bm->size(),
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1744 err_msg("oob: start_idx= "SIZE_FORMAT", bitmap size= "SIZE_FORMAT,
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1745 start_idx, _card_bm->size()));
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1746
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1747 _cm->set_card_bitmap_range(_card_bm, start_idx, end_idx, true /* is_par */);
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6254 diff changeset	1748 }
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1749
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1750 // Set the bit for the region if it contains live data
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1751 if (hr->next_marked_bytes() > 0) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1752 set_bit_for_region(hr);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1753 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1754
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1755 return false;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1756 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1757 };
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1758
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1759 class G1ParFinalCountTask: public AbstractGangTask {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1760 protected:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1761 G1CollectedHeap* _g1h;
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1762 ConcurrentMark* _cm;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1763 BitMap* _actual_region_bm;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1764 BitMap* _actual_card_bm;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1765
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1766 uint _n_workers;
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1767
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1768 public:
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1769 G1ParFinalCountTask(G1CollectedHeap* g1h, BitMap* region_bm, BitMap* card_bm)
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1770 : AbstractGangTask("G1 final counting"),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1771 _g1h(g1h), _cm(_g1h->concurrent_mark()),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1772 _actual_region_bm(region_bm), _actual_card_bm(card_bm),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1773 _n_workers(0) {
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1774 // Use the value already set as the number of active threads
6011 f7a8920427a6 7145441: G1: collection set chooser-related cleanup tonyp parents: 6010 diff changeset	1775 // in the call to run_task().
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1776 if (G1CollectedHeap::use_parallel_gc_threads()) {
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1777 assert( _g1h->workers()->active_workers() > 0,
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1778 "Should have been previously set");
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1779 _n_workers = _g1h->workers()->active_workers();
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	1780 } else {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1781 _n_workers = 1;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	1782 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1783 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1784
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1785 void work(uint worker_id) {
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1786 assert(worker_id < _n_workers, "invariant");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1787
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1788 FinalCountDataUpdateClosure final_update_cl(_g1h,
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1789 _actual_region_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1790 _actual_card_bm);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1791
1833 8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1719 diff changeset	1792 if (G1CollectedHeap::use_parallel_gc_threads()) {
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1793 _g1h->heap_region_par_iterate_chunked(&final_update_cl,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1794 worker_id,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1795 _n_workers,
355 0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 343 diff changeset	1796 HeapRegion::FinalCountClaimValue);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1797 } else {
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1798 _g1h->heap_region_iterate(&final_update_cl);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1799 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1800 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1801 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1802
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1803 class G1ParNoteEndTask;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1804
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1805 class G1NoteEndOfConcMarkClosure : public HeapRegionClosure {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1806 G1CollectedHeap* _g1;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1807 int _worker_num;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1808 size_t _max_live_bytes;
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	1809 uint _regions_claimed;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1810 size_t _freed_bytes;
2173 97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1811 FreeRegionList* _local_cleanup_list;
17736 58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17635 diff changeset	1812 HeapRegionSetCount _old_regions_removed;
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17635 diff changeset	1813 HeapRegionSetCount _humongous_regions_removed;
2173 97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1814 HRRSCleanupTask* _hrrs_cleanup_task;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1815 double _claimed_region_time;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1816 double _max_region_time;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1817
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1818 public:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1819 G1NoteEndOfConcMarkClosure(G1CollectedHeap* g1,
2173 97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1820 int worker_num,
97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1821 FreeRegionList* local_cleanup_list,
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),
17736 58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17635 diff changeset	1828 _old_regions_removed(),
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17635 diff changeset	1829 _humongous_regions_removed(),
4093 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; }
17736 58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17635 diff changeset	1833 const HeapRegionSetCount& old_regions_removed() { return _old_regions_removed; }
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17635 diff changeset	1834 const HeapRegionSetCount& humongous_regions_removed() { return _humongous_regions_removed; }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1835
4093 6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	1836 bool doHeapRegion(HeapRegion *hr) {
6254 a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1837 if (hr->continuesHumongous()) {
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1838 return false;
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1839 }
4093 6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	1840 // We use a claim value of zero here because all regions
6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	1841 // were claimed with value 1 in the FinalCount task.
6254 a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1842 _g1->reset_gc_time_stamps(hr);
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1843 double start = os::elapsedTime();
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1844 _regions_claimed++;
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1845 hr->note_end_of_marking();
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1846 _max_live_bytes += hr->max_live_bytes();
17736 58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17635 diff changeset	1847
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17635 diff changeset	1848 if (hr->used() > 0 && hr->max_live_bytes() == 0 && !hr->is_young()) {
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17635 diff changeset	1849 _freed_bytes += hr->used();
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17635 diff changeset	1850 hr->set_containing_set(NULL);
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17635 diff changeset	1851 if (hr->isHumongous()) {
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17635 diff changeset	1852 assert(hr->startsHumongous(), "we should only see starts humongous");
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17635 diff changeset	1853 _humongous_regions_removed.increment(1u, hr->capacity());
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17635 diff changeset	1854 _g1->free_humongous_region(hr, _local_cleanup_list, true);
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17635 diff changeset	1855 } else {
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17635 diff changeset	1856 _old_regions_removed.increment(1u, hr->capacity());
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17635 diff changeset	1857 _g1->free_region(hr, _local_cleanup_list, true);
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17635 diff changeset	1858 }
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17635 diff changeset	1859 } else {
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17635 diff changeset	1860 hr->rem_set()->do_cleanup_work(_hrrs_cleanup_task);
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17635 diff changeset	1861 }
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17635 diff changeset	1862
6254 a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1863 double region_time = (os::elapsedTime() - start);
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1864 _claimed_region_time += region_time;
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1865 if (region_time > _max_region_time) {
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1866 _max_region_time = region_time;
4093 6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	1867 }
6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	1868 return false;
6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	1869 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1870
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1871 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	1872 uint regions_claimed() { return _regions_claimed; }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1873 double claimed_region_time_sec() { return _claimed_region_time; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1874 double max_region_time_sec() { return _max_region_time; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1875 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1876
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1877 class G1ParNoteEndTask: public AbstractGangTask {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1878 friend class G1NoteEndOfConcMarkClosure;
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	1879
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1880 protected:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1881 G1CollectedHeap* _g1h;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1882 size_t _max_live_bytes;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1883 size_t _freed_bytes;
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	1884 FreeRegionList* _cleanup_list;
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	1885
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1886 public:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1887 G1ParNoteEndTask(G1CollectedHeap* g1h,
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	1888 FreeRegionList* cleanup_list) :
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1889 AbstractGangTask("G1 note end"), _g1h(g1h),
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	1890 _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	1891
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1892 void work(uint worker_id) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1893 double start = os::elapsedTime();
2173 97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1894 FreeRegionList local_cleanup_list("Local Cleanup List");
97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1895 HRRSCleanupTask hrrs_cleanup_task;
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1896 G1NoteEndOfConcMarkClosure g1_note_end(_g1h, worker_id, &local_cleanup_list,
2173 97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1897 &hrrs_cleanup_task);
1833 8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1719 diff changeset	1898 if (G1CollectedHeap::use_parallel_gc_threads()) {
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1899 _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	1900 _g1h->workers()->active_workers(),
355 0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 343 diff changeset	1901 HeapRegion::NoteEndClaimValue);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1902 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1903 _g1h->heap_region_iterate(&g1_note_end);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1904 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1905 assert(g1_note_end.complete(), "Shouldn't have yielded!");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1906
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	1907 // Now update the lists
17736 58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17635 diff changeset	1908 _g1h->remove_from_old_sets(g1_note_end.old_regions_removed(), g1_note_end.humongous_regions_removed());
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1909 {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1910 MutexLockerEx x(ParGCRareEvent_lock, Mutex::_no_safepoint_check_flag);
17736 58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17635 diff changeset	1911 _g1h->decrement_summary_bytes(g1_note_end.freed_bytes());
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1912 _max_live_bytes += g1_note_end.max_live_bytes();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1913 _freed_bytes += g1_note_end.freed_bytes();
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	1914
3778 5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3776 diff changeset	1915 // 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	1916 // 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	1917 // generate output for the newly-reclaimed regions (the list
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3776 diff changeset	1918 // 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	1919 // 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	1920 // 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	1921 // cleanup list.
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3776 diff changeset	1922
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3776 diff changeset	1923 G1HRPrinter* hr_printer = _g1h->hr_printer();
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3776 diff changeset	1924 if (hr_printer->is_active()) {
17736 58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17635 diff changeset	1925 FreeRegionListIterator iter(&local_cleanup_list);
3778 5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3776 diff changeset	1926 while (iter.more_available()) {
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3776 diff changeset	1927 HeapRegion* hr = iter.get_next();
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3776 diff changeset	1928 hr_printer->cleanup(hr);
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3776 diff changeset	1929 }
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3776 diff changeset	1930 }
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3776 diff changeset	1931
17773 8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17750 diff changeset	1932 _cleanup_list->add_ordered(&local_cleanup_list);
2173 97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1933 assert(local_cleanup_list.is_empty(), "post-condition");
97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1934
97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1935 HeapRegionRemSet::finish_cleanup_task(&hrrs_cleanup_task);
342 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 size_t max_live_bytes() { return _max_live_bytes; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1939 size_t freed_bytes() { return _freed_bytes; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1940 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1941
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1942 class G1ParScrubRemSetTask: public AbstractGangTask {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1943 protected:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1944 G1RemSet* _g1rs;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1945 BitMap* _region_bm;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1946 BitMap* _card_bm;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1947 public:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1948 G1ParScrubRemSetTask(G1CollectedHeap* g1h,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1949 BitMap* region_bm, BitMap* card_bm) :
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1950 AbstractGangTask("G1 ScrubRS"), _g1rs(g1h->g1_rem_set()),
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1951 _region_bm(region_bm), _card_bm(card_bm) { }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1952
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1953 void work(uint worker_id) {
1833 8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1719 diff changeset	1954 if (G1CollectedHeap::use_parallel_gc_threads()) {
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1955 _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	1956 HeapRegion::ScrubRemSetClaimValue);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1957 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1958 _g1rs->scrub(_region_bm, _card_bm);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1959 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1960 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1961
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1962 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1963
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1964 void ConcurrentMark::cleanup() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1965 // world is stopped at this checkpoint
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1966 assert(SafepointSynchronize::is_at_safepoint(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1967 "world should be stopped");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1968 G1CollectedHeap* g1h = G1CollectedHeap::heap();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1969
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1970 // If a full collection has happened, we shouldn't do this.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1971 if (has_aborted()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1972 g1h->set_marking_complete(); // So bitmap clearing isn't confused
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1973 return;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1974 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1975
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	1976 g1h->verify_region_sets_optional();
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	1977
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	1978 if (VerifyDuringGC) {
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	1979 HandleMark hm; // handle scope
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	1980 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	1981 Universe::verify(VerifyOption_G1UsePrevMarking,
b06ac540229e 8013132: Add a flag to turn off the output of the verbose verification code stefank parents: 9076 diff changeset	1982 " VerifyDuringGC:(before)");
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	1983 }
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	1984
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1985 G1CollectorPolicy* g1p = G1CollectedHeap::heap()->g1_policy();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1986 g1p->record_concurrent_mark_cleanup_start();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1987
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1988 double start = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1989
2173 97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1990 HeapRegionRemSet::reset_for_cleanup_tasks();
97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1991
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1992 uint n_workers;
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1993
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1994 // 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	1995 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	1996
1833 8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1719 diff changeset	1997 if (G1CollectedHeap::use_parallel_gc_threads()) {
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1998 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	1999 "sanity check");
0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 343 diff changeset	2000
4711 adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	2001 g1h->set_par_threads();
adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	2002 n_workers = g1h->n_par_threads();
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	2003 assert(g1h->n_par_threads() == n_workers,
4711 adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	2004 "Should not have been reset");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2005 g1h->workers()->run_task(&g1_par_count_task);
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2006 // Done with the parallel phase so reset to 0.
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2007 g1h->set_par_threads(0);
355 0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 343 diff changeset	2008
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2009 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	2010 "sanity check");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2011 } else {
4711 adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	2012 n_workers = 1;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2013 g1_par_count_task.work(0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2014 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2015
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2016 if (VerifyDuringGC) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2017 // Verify that the counting data accumulated during marking matches
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2018 // that calculated by walking the marking bitmap.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2019
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2020 // Bitmaps to hold expected values
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2021 BitMap expected_region_bm(_region_bm.size(), false);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2022 BitMap expected_card_bm(_card_bm.size(), false);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2023
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2024 G1ParVerifyFinalCountTask g1_par_verify_task(g1h,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2025 &_region_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2026 &_card_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2027 &expected_region_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2028 &expected_card_bm);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2029
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2030 if (G1CollectedHeap::use_parallel_gc_threads()) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2031 g1h->set_par_threads((int)n_workers);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2032 g1h->workers()->run_task(&g1_par_verify_task);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2033 // Done with the parallel phase so reset to 0.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2034 g1h->set_par_threads(0);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2035
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2036 assert(g1h->check_heap_region_claim_values(HeapRegion::VerifyCountClaimValue),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2037 "sanity check");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2038 } else {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2039 g1_par_verify_task.work(0);
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
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2042 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	2043 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2044
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2045 size_t start_used_bytes = g1h->used();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2046 g1h->set_marking_complete();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2047
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2048 double count_end = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2049 double this_final_counting_time = (count_end - start);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2050 _total_counting_time += this_final_counting_time;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2051
2435 371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	2052 if (G1PrintRegionLivenessInfo) {
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	2053 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	2054 _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	2055 }
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	2056
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2057 // Install newly created mark bitMap as "prev".
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2058 swapMarkBitMaps();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2059
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2060 g1h->reset_gc_time_stamp();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2061
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2062 // Note end of marking in all heap regions.
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2063 G1ParNoteEndTask g1_par_note_end_task(g1h, &_cleanup_list);
1833 8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1719 diff changeset	2064 if (G1CollectedHeap::use_parallel_gc_threads()) {
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2065 g1h->set_par_threads((int)n_workers);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2066 g1h->workers()->run_task(&g1_par_note_end_task);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2067 g1h->set_par_threads(0);
355 0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 343 diff changeset	2068
0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 343 diff changeset	2069 assert(g1h->check_heap_region_claim_values(HeapRegion::NoteEndClaimValue),
0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 343 diff changeset	2070 "sanity check");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2071 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2072 g1_par_note_end_task.work(0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2073 }
6254 a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	2074 g1h->check_gc_time_stamps();
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2075
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2076 if (!cleanup_list_is_empty()) {
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2077 // 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	2078 // concurrently. Notify anyone else that might be wanting free
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2079 // regions that there will be more free regions coming soon.
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2080 g1h->set_free_regions_coming();
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2081 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2082
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2083 // 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	2084 // regions.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2085 if (G1ScrubRemSets) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2086 double rs_scrub_start = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2087 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	2088 if (G1CollectedHeap::use_parallel_gc_threads()) {
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2089 g1h->set_par_threads((int)n_workers);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2090 g1h->workers()->run_task(&g1_par_scrub_rs_task);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2091 g1h->set_par_threads(0);
355 0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 343 diff changeset	2092
0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 343 diff changeset	2093 assert(g1h->check_heap_region_claim_values(
0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 343 diff changeset	2094 HeapRegion::ScrubRemSetClaimValue),
0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 343 diff changeset	2095 "sanity check");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2096 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2097 g1_par_scrub_rs_task.work(0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2098 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2099
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2100 double rs_scrub_end = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2101 double this_rs_scrub_time = (rs_scrub_end - rs_scrub_start);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2102 _total_rs_scrub_time += this_rs_scrub_time;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2103 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2104
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2105 // this will also free any regions totally full of garbage objects,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2106 // and sort the regions.
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2107 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	2108
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2109 // Statistics.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2110 double end = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2111 _cleanup_times.add((end - start) * 1000.0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2112
6007 5c86f8211d1e 7160728: Introduce an extra logging level for G1 logging brutisso parents: 5988 diff changeset	2113 if (G1Log::fine()) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2114 g1h->print_size_transition(gclog_or_tty,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2115 start_used_bytes,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2116 g1h->used(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2117 g1h->capacity());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2118 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2119
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2120 // Clean up will have freed any regions completely full of garbage.
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2121 // Update the soft reference policy with the new heap occupancy.
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2122 Universe::update_heap_info_at_gc();
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2123
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2124 // 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	2125 // races with it goes around and waits for completeCleanup to finish.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2126 g1h->increment_total_collections();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2127
4830 0b3d1ec6eaee 7097586: G1: improve the per-space output when using jmap -heap tonyp parents: 4828 diff changeset	2128 // 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	2129 // 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	2130 g1h->g1mm()->update_sizes();
0b3d1ec6eaee 7097586: G1: improve the per-space output when using jmap -heap tonyp parents: 4828 diff changeset	2131
751 20c6f43950b5 6490395: G1: Tidy up command line flags. johnc parents: 647 diff changeset	2132 if (VerifyDuringGC) {
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	2133 HandleMark hm; // handle scope
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	2134 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	2135 Universe::verify(VerifyOption_G1UsePrevMarking,
b06ac540229e 8013132: Add a flag to turn off the output of the verbose verification code stefank parents: 9076 diff changeset	2136 " VerifyDuringGC:(after)");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2137 }
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2138
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2139 g1h->verify_region_sets_optional();
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	2140 g1h->trace_heap_after_concurrent_cycle();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2141 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2142
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2143 void ConcurrentMark::completeCleanup() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2144 if (has_aborted()) return;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2145
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2146 G1CollectedHeap* g1h = G1CollectedHeap::heap();
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2147
17736 58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17635 diff changeset	2148 _cleanup_list.verify_list();
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2177 diff changeset	2149 FreeRegionList tmp_free_list("Tmp Free List");
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2150
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2151 if (G1ConcRegionFreeingVerbose) {
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2152 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	2153 "cleanup list has %u entries",
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2154 _cleanup_list.length());
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2155 }
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2156
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2157 // Noone else should be accessing the _cleanup_list at this point,
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2158 // so it's not necessary to take any locks
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2159 while (!_cleanup_list.is_empty()) {
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2160 HeapRegion* hr = _cleanup_list.remove_head();
17773 8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17750 diff changeset	2161 assert(hr != NULL, "Got NULL from a non-empty list");
3317 063382f9b575 7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...) tonyp parents: 3316 diff changeset	2162 hr->par_clear();
17773 8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17750 diff changeset	2163 tmp_free_list.add_ordered(hr);
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2164
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2165 // 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	2166 // 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	2167 // 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	2168 // 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	2169 // _cleanup_list is empty (which means we just removed the last
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2170 // region from the _cleanup_list).
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2177 diff changeset	2171 if ((tmp_free_list.length() % G1SecondaryFreeListAppendLength == 0) \|\|
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2172 _cleanup_list.is_empty()) {
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2173 if (G1ConcRegionFreeingVerbose) {
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2174 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	2175 "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	2176 "cleanup list still has %u entries",
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2177 diff changeset	2177 tmp_free_list.length(),
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2178 _cleanup_list.length());
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2179 }
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2180
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2181 {
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2182 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag);
17773 8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17750 diff changeset	2183 g1h->secondary_free_list_add(&tmp_free_list);
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2184 SecondaryFreeList_lock->notify_all();
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2185 }
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2186
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2187 if (G1StressConcRegionFreeing) {
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2188 for (uintx i = 0; i < G1StressConcRegionFreeingDelayMillis; ++i) {
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2189 os::sleep(Thread::current(), (jlong) 1, false);
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2190 }
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2191 }
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 }
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2177 diff changeset	2194 assert(tmp_free_list.is_empty(), "post-condition");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2195 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2196
8014 f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2197 // Supporting Object and Oop closures for reference discovery
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2198 // and processing in during marking
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2199
2037 b03260081e9b 7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field johnc parents: 1974 diff changeset	2200 bool G1CMIsAliveClosure::do_object_b(oop obj) {
b03260081e9b 7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field johnc parents: 1974 diff changeset	2201 HeapWord* addr = (HeapWord*)obj;
b03260081e9b 7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field johnc parents: 1974 diff changeset	2202 return addr != NULL &&
b03260081e9b 7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field johnc parents: 1974 diff changeset	2203 (!_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	2204 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2205
8014 f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2206 // '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	2207 // 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	2208 // 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	2209 // trace referent objects.
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2210 //
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2211 // 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	2212 // 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	2213 // 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	2214 // 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	2215 // 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	2216 // operating on the global stack.
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2217
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2218 class G1CMKeepAliveAndDrainClosure: public OopClosure {
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2219 ConcurrentMark* _cm;
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2220 CMTask* _task;
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2221 int _ref_counter_limit;
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2222 int _ref_counter;
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2223 bool _is_serial;
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2224 public:
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2225 G1CMKeepAliveAndDrainClosure(ConcurrentMark* cm, CMTask* task, bool is_serial) :
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2226 _cm(cm), _task(task), _is_serial(is_serial),
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2227 _ref_counter_limit(G1RefProcDrainInterval) {
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2228 assert(_ref_counter_limit > 0, "sanity");
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2229 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	2230 _ref_counter = _ref_counter_limit;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2231 }
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2232
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2233 virtual void do_oop(narrowOop* p) { do_oop_work(p); }
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2234 virtual void do_oop( oop* p) { do_oop_work(p); }
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2235
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2236 template <class T> void do_oop_work(T* p) {
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2237 if (!_cm->has_overflown()) {
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2238 oop obj = oopDesc::load_decode_heap_oop(p);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	2239 if (_cm->verbose_high()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	2240 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	2241 "*"PTR_FORMAT" = "PTR_FORMAT,
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	2242 _task->worker_id(), p, (void*) obj);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	2243 }
2174 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 _task->deal_with_reference(obj);
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2246 _ref_counter--;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2247
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2248 if (_ref_counter == 0) {
8014 f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2249 // 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	2250 // 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	2251 // 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	2252 // process these entries.
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2253 //
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2254 // 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	2255 // 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	2256 // 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	2257 // above) or we overflow.
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2258 //
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2259 // 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	2260 // 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	2261 // 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	2262 // 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	2263 // 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	2264 // has_aborted() flag that the marking step has completed.
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2265 do {
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2266 double mark_step_duration_ms = G1ConcMarkStepDurationMillis;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2267 _task->do_marking_step(mark_step_duration_ms,
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2268 false /* do_termination */,
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2269 _is_serial);
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2270 } while (_task->has_aborted() && !_cm->has_overflown());
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2271 _ref_counter = _ref_counter_limit;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2272 }
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2273 } else {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	2274 if (_cm->verbose_high()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	2275 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	2276 }
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2277 }
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2278 }
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2279 };
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2280
8014 f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2281 // '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	2282 // 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	2283 // 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	2284 // 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	2285 // 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	2286 // added by the 'keep alive' oop closure above.
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2287
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2288 class G1CMDrainMarkingStackClosure: public VoidClosure {
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2289 ConcurrentMark* _cm;
8014 f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2290 CMTask* _task;
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2291 bool _is_serial;
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2292 public:
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2293 G1CMDrainMarkingStackClosure(ConcurrentMark* cm, CMTask* task, bool is_serial) :
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2294 _cm(cm), _task(task), _is_serial(is_serial) {
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2295 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	2296 }
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2297
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2298 void do_void() {
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2299 do {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	2300 if (_cm->verbose_high()) {
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2301 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	2302 _task->worker_id(), BOOL_TO_STR(_is_serial));
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	2303 }
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2304
8014 f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2305 // 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	2306 // 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	2307 // oop closure (an instance of G1CMKeepAliveAndDrainClosure above).
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2308 //
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2309 // 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	2310 // 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	2311 // 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	2312 // 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	2313 // the global marking stack.
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2314 //
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2315 // 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	2316 // 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	2317 // 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	2318 // 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	2319 // 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	2320 // has_aborted() flag that the marking step has completed.
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2321
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2322 _task->do_marking_step(1000000000.0 /* something very large */,
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2323 true /* do_termination */,
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2324 _is_serial);
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2325 } while (_task->has_aborted() && !_cm->has_overflown());
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2326 }
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2327 };
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2328
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2329 // Implementation of AbstractRefProcTaskExecutor for parallel
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2330 // reference processing at the end of G1 concurrent marking
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2331
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2332 class G1CMRefProcTaskExecutor: public AbstractRefProcTaskExecutor {
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2333 private:
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2334 G1CollectedHeap* _g1h;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2335 ConcurrentMark* _cm;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2336 WorkGang* _workers;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2337 int _active_workers;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2338
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2339 public:
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2340 G1CMRefProcTaskExecutor(G1CollectedHeap* g1h,
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2341 ConcurrentMark* cm,
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2342 WorkGang* workers,
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2343 int n_workers) :
4093 6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	2344 _g1h(g1h), _cm(cm),
6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	2345 _workers(workers), _active_workers(n_workers) { }
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2346
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2347 // Executes the given task using concurrent marking worker threads.
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2348 virtual void execute(ProcessTask& task);
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2349 virtual void execute(EnqueueTask& task);
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2350 };
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2351
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2352 class G1CMRefProcTaskProxy: public AbstractGangTask {
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2353 typedef AbstractRefProcTaskExecutor::ProcessTask ProcessTask;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2354 ProcessTask& _proc_task;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2355 G1CollectedHeap* _g1h;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2356 ConcurrentMark* _cm;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2357
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2358 public:
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2359 G1CMRefProcTaskProxy(ProcessTask& proc_task,
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2360 G1CollectedHeap* g1h,
4093 6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	2361 ConcurrentMark* cm) :
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2362 AbstractGangTask("Process reference objects in parallel"),
8014 f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2363 _proc_task(proc_task), _g1h(g1h), _cm(cm) {
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2364 ReferenceProcessor* rp = _g1h->ref_processor_cm();
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2365 assert(rp->processing_is_mt(), "shouldn't be here otherwise");
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2366 }
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2367
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	2368 virtual void work(uint worker_id) {
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2369 CMTask* task = _cm->task(worker_id);
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2370 G1CMIsAliveClosure g1_is_alive(_g1h);
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2371 G1CMKeepAliveAndDrainClosure g1_par_keep_alive(_cm, task, false /* is_serial */);
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2372 G1CMDrainMarkingStackClosure g1_par_drain(_cm, task, false /* is_serial */);
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2373
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	2374 _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	2375 }
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2376 };
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2377
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2378 void G1CMRefProcTaskExecutor::execute(ProcessTask& proc_task) {
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2379 assert(_workers != NULL, "Need parallel worker threads.");
8014 f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2380 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	2381
4093 6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	2382 G1CMRefProcTaskProxy proc_task_proxy(proc_task, _g1h, _cm);
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2383
8788 e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2384 // 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	2385 // proxy task execution, so that the termination protocol
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2386 // 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	2387 // how many workers to wait for.
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2388 _cm->set_concurrency(_active_workers);
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2389 _g1h->set_par_threads(_active_workers);
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2390 _workers->run_task(&proc_task_proxy);
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2391 _g1h->set_par_threads(0);
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2392 }
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2393
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2394 class G1CMRefEnqueueTaskProxy: public AbstractGangTask {
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2395 typedef AbstractRefProcTaskExecutor::EnqueueTask EnqueueTask;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2396 EnqueueTask& _enq_task;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2397
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2398 public:
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2399 G1CMRefEnqueueTaskProxy(EnqueueTask& enq_task) :
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2400 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	2401 _enq_task(enq_task) { }
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2402
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	2403 virtual void work(uint worker_id) {
441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	2404 _enq_task.work(worker_id);
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2405 }
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2406 };
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2407
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2408 void G1CMRefProcTaskExecutor::execute(EnqueueTask& enq_task) {
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2409 assert(_workers != NULL, "Need parallel worker threads.");
8014 f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2410 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	2411
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2412 G1CMRefEnqueueTaskProxy enq_task_proxy(enq_task);
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2413
8788 e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2414 // Not strictly necessary but...
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2415 //
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2416 // 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	2417 // proxy task execution, so that the termination protocol
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2418 // 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	2419 // how many workers to wait for.
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2420 _cm->set_concurrency(_active_workers);
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2421 _g1h->set_par_threads(_active_workers);
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2422 _workers->run_task(&enq_task_proxy);
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2423 _g1h->set_par_threads(0);
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2424 }
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2425
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2426 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	2427 if (has_overflown()) {
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2428 // Skip processing the discovered references if we have
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2429 // overflown the global marking stack. Reference objects
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2430 // 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	2431 // 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	2432 // 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	2433 // less reference objects are discovered.
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2434 return;
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2435 }
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2436
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2437 ResourceMark rm;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2438 HandleMark hm;
3975 1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2439
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2440 G1CollectedHeap* g1h = G1CollectedHeap::heap();
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 // Is alive closure.
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2443 G1CMIsAliveClosure g1_is_alive(g1h);
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2444
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2445 // 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	2446 // tables from the displayed time.
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2447 {
6007 5c86f8211d1e 7160728: Introduce an extra logging level for G1 logging brutisso parents: 5988 diff changeset	2448 if (G1Log::finer()) {
3975 1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2449 gclog_or_tty->put(' ');
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2450 }
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	2451 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	2452
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2453 ReferenceProcessor* rp = g1h->ref_processor_cm();
3975 1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2454
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2455 // See the comment in G1CollectedHeap::ref_processing_init()
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2456 // about how reference processing currently works in G1.
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2457
8014 f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2458 // Set the soft reference policy
3975 1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2459 rp->setup_policy(clear_all_soft_refs);
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2460 assert(_markStack.isEmpty(), "mark stack should be empty");
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2461
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2462 // Instances of the 'Keep Alive' and 'Complete GC' closures used
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2463 // in serial reference processing. Note these closures are also
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2464 // used for serially processing (by the the current thread) the
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2465 // JNI references during parallel reference processing.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2466 //
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2467 // These closures do not need to synchronize with the worker
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2468 // threads involved in parallel reference processing as these
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2469 // instances are executed serially by the current thread (e.g.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2470 // reference processing is not multi-threaded and is thus
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2471 // performed by the current thread instead of a gang worker).
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2472 //
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2473 // The gang tasks involved in parallel reference procssing create
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2474 // their own instances of these closures, which do their own
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2475 // synchronization among themselves.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2476 G1CMKeepAliveAndDrainClosure g1_keep_alive(this, task(0), true /* is_serial */);
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2477 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	2478
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2479 // We need at least one active thread. If reference processing
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2480 // is not multi-threaded we use the current (VMThread) thread,
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2481 // otherwise we use the work gang from the G1CollectedHeap and
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2482 // we utilize all the worker threads we can.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2483 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	2484 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	2485 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	2486
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2487 // Parallel processing task executor.
4093 6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	2488 G1CMRefProcTaskExecutor par_task_executor(g1h, this,
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2489 g1h->workers(), active_workers);
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2490 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	2491
8788 e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2492 // 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	2493 // executing the remark task.
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2494 set_concurrency(active_workers);
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2495
8014 f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2496 // 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	2497 // 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	2498 // 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	2499 // 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	2500 rp->set_active_mt_degree(active_workers);
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2501
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2502 // Process the weak references.
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	2503 const ReferenceProcessorStats& stats =
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	2504 rp->process_discovered_references(&g1_is_alive,
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	2505 &g1_keep_alive,
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	2506 &g1_drain_mark_stack,
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	2507 executor,
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	2508 g1h->gc_timer_cm());
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	2509 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	2510
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2511 // 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	2512 // 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	2513 // global marking stack.
3975 1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2514
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2515 assert(_markStack.overflow() \|\| _markStack.isEmpty(),
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2516 "mark stack should be empty (unless it overflowed)");
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2517
3975 1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2518 if (_markStack.overflow()) {
8014 f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2519 // 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	2520 // 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	2521 set_has_overflown();
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2522 }
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2523
8014 f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2524 assert(rp->num_q() == active_workers, "why not");
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2525
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2526 rp->enqueue_discovered_references(executor);
3975 1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2527
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2528 rp->verify_no_references_recorded();
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2529 assert(!rp->discovery_enabled(), "Post condition");
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2530 }
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2531
17750 f53edbc2b728 8036673: G1: Abort weak reference processing if mark stack overflows pliden parents: 17736 diff changeset	2532 if (has_overflown()) {
f53edbc2b728 8036673: G1: Abort weak reference processing if mark stack overflows pliden parents: 17736 diff changeset	2533 // We can not trust g1_is_alive if the marking stack overflowed
f53edbc2b728 8036673: G1: Abort weak reference processing if mark stack overflows pliden parents: 17736 diff changeset	2534 return;
f53edbc2b728 8036673: G1: Abort weak reference processing if mark stack overflows pliden parents: 17736 diff changeset	2535 }
f53edbc2b728 8036673: G1: Abort weak reference processing if mark stack overflows pliden parents: 17736 diff changeset	2536
17635 cb7ec2423207 8027454: Do not traverse string table during G1 remark when treating them as strong roots during initial mark tschatzl parents: 17634 diff changeset	2537 g1h->unlink_string_and_symbol_table(&g1_is_alive,
cb7ec2423207 8027454: Do not traverse string table during G1 remark when treating them as strong roots during initial mark tschatzl parents: 17634 diff changeset	2538 /* process_strings */ false, // currently strings are always roots
cb7ec2423207 8027454: Do not traverse string table during G1 remark when treating them as strong roots during initial mark tschatzl parents: 17634 diff changeset	2539 /* process_symbols */ true);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2540 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2541
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2542 void ConcurrentMark::swapMarkBitMaps() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2543 CMBitMapRO* temp = _prevMarkBitMap;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2544 _prevMarkBitMap = (CMBitMapRO*)_nextMarkBitMap;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2545 _nextMarkBitMap = (CMBitMap*) temp;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2546 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2547
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2548 class CMRemarkTask: public AbstractGangTask {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2549 private:
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2550 ConcurrentMark* _cm;
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2551 bool _is_serial;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2552 public:
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	2553 void work(uint worker_id) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2554 // Since all available tasks are actually started, we should
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2555 // 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	2556 if (worker_id < _cm->active_tasks()) {
441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	2557 CMTask* task = _cm->task(worker_id);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2558 task->record_start_time();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2559 do {
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2560 task->do_marking_step(1000000000.0 /* something very large */,
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2561 true /* do_termination */,
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2562 _is_serial);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2563 } while (task->has_aborted() && !_cm->has_overflown());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2564 // 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	2565 // want to abort remark and do concurrent marking again.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2566 task->record_end_time();
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
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2570 CMRemarkTask(ConcurrentMark* cm, int active_workers, bool is_serial) :
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2571 AbstractGangTask("Par Remark"), _cm(cm), _is_serial(is_serial) {
4711 adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	2572 _cm->terminator()->reset_for_reuse(active_workers);
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2573 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2574 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2575
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2576 void ConcurrentMark::checkpointRootsFinalWork() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2577 ResourceMark rm;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2578 HandleMark hm;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2579 G1CollectedHeap* g1h = G1CollectedHeap::heap();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2580
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2581 g1h->ensure_parsability(false);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2582
1833 8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1719 diff changeset	2583 if (G1CollectedHeap::use_parallel_gc_threads()) {
989 148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 912 diff changeset	2584 G1CollectedHeap::StrongRootsScope srs(g1h);
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2585 // 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	2586 uint active_workers = g1h->workers()->active_workers();
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2587 if (active_workers == 0) {
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2588 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	2589 active_workers = (uint) ParallelGCThreads;
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2590 g1h->workers()->set_active_workers(active_workers);
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2591 }
8788 e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2592 set_concurrency_and_phase(active_workers, false /* concurrent */);
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2593 // Leave _parallel_marking_threads at it's
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2594 // value originally calculated in the ConcurrentMark
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2595 // constructor and pass values of the active workers
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2596 // through the gang in the task.
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2597
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2598 CMRemarkTask remarkTask(this, active_workers, false /* is_serial */);
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2599 // 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	2600 // 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	2601 // immediately.
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2602 g1h->set_par_threads(active_workers);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2603 g1h->workers()->run_task(&remarkTask);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2604 g1h->set_par_threads(0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2605 } else {
989 148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 912 diff changeset	2606 G1CollectedHeap::StrongRootsScope srs(g1h);
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	2607 uint active_workers = 1;
8788 e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2608 set_concurrency_and_phase(active_workers, false /* concurrent */);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2609
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2610 // 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	2611 // the thread to execute the remark - serially. We have
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2612 // to pass true for the is_serial parameter so that
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2613 // CMTask::do_marking_step() doesn't enter the sync
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2614 // barriers in the event of an overflow. Doing so will
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2615 // cause an assert that the current thread is not a
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2616 // concurrent GC thread.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2617 CMRemarkTask remarkTask(this, active_workers, true /* is_serial*/);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2618 remarkTask.work(0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2619 }
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	2620 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	2621 guarantee(has_overflown() \|\|
1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure johnc parents: 8788 diff changeset	2622 satb_mq_set.completed_buffers_num() == 0,
1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure johnc parents: 8788 diff changeset	2623 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	2624 BOOL_TO_STR(has_overflown()),
1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure johnc parents: 8788 diff changeset	2625 satb_mq_set.completed_buffers_num()));
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2626
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2627 print_stats();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2628 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2629
1044 6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2630 #ifndef PRODUCT
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2631
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2632 class PrintReachableOopClosure: public OopClosure {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2633 private:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2634 G1CollectedHeap* _g1h;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2635 outputStream* _out;
3772 6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2636 VerifyOption _vo;
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2637 bool _all;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2638
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2639 public:
3772 6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2640 PrintReachableOopClosure(outputStream* out,
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2641 VerifyOption vo,
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2642 bool all) :
1044 6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2643 _g1h(G1CollectedHeap::heap()),
3772 6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2644 _out(out), _vo(vo), _all(all) { }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2645
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	2646 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	2647 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	2648
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	2649 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	2650 oop obj = oopDesc::load_decode_heap_oop(p);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2651 const char* str = NULL;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2652 const char* str2 = "";
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2653
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2654 if (obj == NULL) {
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2655 str = "";
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2656 } else if (!_g1h->is_in_g1_reserved(obj)) {
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2657 str = " O";
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2658 } else {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2659 HeapRegion* hr = _g1h->heap_region_containing(obj);
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	2660 guarantee(hr != NULL, "invariant");
6254 a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	2661 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	2662 bool marked = _g1h->is_marked(obj, _vo);
1044 6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2663
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2664 if (over_tams) {
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2665 str = " >";
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2666 if (marked) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2667 str2 = " AND MARKED";
1044 6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2668 }
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2669 } else if (marked) {
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2670 str = " M";
1044 6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2671 } else {
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2672 str = " NOT";
1044 6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2673 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2674 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2675
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2676 _out->print_cr(" "PTR_FORMAT": "PTR_FORMAT"%s%s",
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2677 p, (void*) obj, str, str2);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2678 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2679 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2680
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2681 class PrintReachableObjectClosure : public ObjectClosure {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2682 private:
3772 6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2683 G1CollectedHeap* _g1h;
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2684 outputStream* _out;
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2685 VerifyOption _vo;
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2686 bool _all;
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2687 HeapRegion* _hr;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2688
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2689 public:
3772 6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2690 PrintReachableObjectClosure(outputStream* out,
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2691 VerifyOption vo,
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2692 bool all,
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2693 HeapRegion* hr) :
3772 6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2694 _g1h(G1CollectedHeap::heap()),
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2695 _out(out), _vo(vo), _all(all), _hr(hr) { }
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2696
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2697 void do_object(oop o) {
6254 a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	2698 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	2699 bool marked = _g1h->is_marked(o, _vo);
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2700 bool print_it = _all \|\| over_tams \|\| marked;
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2701
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2702 if (print_it) {
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2703 _out->print_cr(" "PTR_FORMAT"%s",
12316 190899198332 7195622: CheckUnhandledOops has limited usefulness now hseigel parents: 12229 diff changeset	2704 (void *)o, (over_tams) ? " >" : (marked) ? " M" : "");
3772 6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2705 PrintReachableOopClosure oopCl(_out, _vo, _all);
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6254 diff changeset	2706 o->oop_iterate_no_header(&oopCl);
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2707 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2708 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2709 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2710
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2711 class PrintReachableRegionClosure : public HeapRegionClosure {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2712 private:
6254 a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	2713 G1CollectedHeap* _g1h;
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	2714 outputStream* _out;
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	2715 VerifyOption _vo;
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	2716 bool _all;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2717
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2718 public:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2719 bool doHeapRegion(HeapRegion* hr) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2720 HeapWord* b = hr->bottom();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2721 HeapWord* e = hr->end();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2722 HeapWord* t = hr->top();
6254 a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	2723 HeapWord* p = _g1h->top_at_mark_start(hr, _vo);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2724 _out->print_cr("** ["PTR_FORMAT", "PTR_FORMAT"] top: "PTR_FORMAT" "
1044 6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2725 "TAMS: "PTR_FORMAT, b, e, t, p);
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2726 _out->cr();
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2727
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2728 HeapWord* from = b;
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2729 HeapWord* to = t;
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2730
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2731 if (to > from) {
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2732 _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	2733 _out->cr();
3772 6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2734 PrintReachableObjectClosure ocl(_out, _vo, _all, hr);
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2735 hr->object_iterate_mem_careful(MemRegion(from, to), &ocl);
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2736 _out->cr();
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2737 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2738
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2739 return false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2740 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2741
3772 6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2742 PrintReachableRegionClosure(outputStream* out,
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2743 VerifyOption vo,
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2744 bool all) :
6254 a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	2745 _g1h(G1CollectedHeap::heap()), _out(out), _vo(vo), _all(all) { }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2746 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2747
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2748 void ConcurrentMark::print_reachable(const char* str,
3772 6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2749 VerifyOption vo,
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2750 bool all) {
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2751 gclog_or_tty->cr();
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2752 gclog_or_tty->print_cr("== Doing heap dump... ");
1044 6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2753
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2754 if (G1PrintReachableBaseFile == NULL) {
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2755 gclog_or_tty->print_cr(" #### error: no base file defined");
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2756 return;
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2757 }
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2758
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2759 if (strlen(G1PrintReachableBaseFile) + 1 + strlen(str) >
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2760 (JVM_MAXPATHLEN - 1)) {
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2761 gclog_or_tty->print_cr(" #### error: file name too long");
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2762 return;
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2763 }
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2764
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2765 char file_name[JVM_MAXPATHLEN];
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2766 sprintf(file_name, "%s.%s", G1PrintReachableBaseFile, str);
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2767 gclog_or_tty->print_cr(" dumping to file %s", file_name);
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2768
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2769 fileStream fout(file_name);
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2770 if (!fout.is_open()) {
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2771 gclog_or_tty->print_cr(" #### error: could not open file");
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2772 return;
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2773 }
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2774
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2775 outputStream* out = &fout;
6254 a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	2776 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	2777 out->cr();
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2778
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2779 out->print_cr("--- ITERATING OVER REGIONS");
1044 6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2780 out->cr();
3772 6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2781 PrintReachableRegionClosure rcl(out, vo, all);
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2782 _g1h->heap_region_iterate(&rcl);
1044 6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2783 out->cr();
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2784
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2785 gclog_or_tty->print_cr(" done");
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2786 gclog_or_tty->flush();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2787 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2788
1044 6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2789 #endif // PRODUCT
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2790
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2791 void ConcurrentMark::clearRangePrevBitmap(MemRegion mr) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2792 // 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	2793 // the cast.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2794 ((CMBitMap*)_prevMarkBitMap)->clearRange(mr);
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2795 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2796
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2797 void ConcurrentMark::clearRangeNextBitmap(MemRegion mr) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2798 _nextMarkBitMap->clearRange(mr);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2799 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2800
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2801 void ConcurrentMark::clearRangeBothBitmaps(MemRegion mr) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2802 clearRangePrevBitmap(mr);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2803 clearRangeNextBitmap(mr);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2804 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2805
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2806 HeapRegion*
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	2807 ConcurrentMark::claim_region(uint worker_id) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2808 // "checkpoint" the finger
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2809 HeapWord* finger = _finger;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2810
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2811 // _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	2812 // yield points.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2813 while (finger < _heap_end) {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	2814 assert(_g1h->is_in_g1_reserved(finger), "invariant");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2815
3771 842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2816 // Note on how this code handles humongous regions. In the
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2817 // normal case the finger will reach the start of a "starts
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2818 // humongous" (SH) region. Its end will either be the end of the
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2819 // last "continues humongous" (CH) region in the sequence, or the
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2820 // 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	2821 // the sequence). That way claim_region() will skip over the CH
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2822 // regions. However, there is a subtle race between a CM thread
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2823 // executing this method and a mutator thread doing a humongous
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2824 // object allocation. The two are not mutually exclusive as the CM
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2825 // thread does not need to hold the Heap_lock when it gets
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2826 // here. So there is a chance that claim_region() will come across
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2827 // 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	2828 // region. In the former case, it will either
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2829 // 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	2830 // visit every subsequent CH region, will find their bitmaps
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2831 // empty, and do nothing, or
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2832 // b) Will observe the update of the region's end (in which case
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2833 // it will skip the subsequent CH regions).
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2834 // If it comes across a region that suddenly becomes CH, the
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2835 // scenario will be similar to b). So, the race between
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2836 // claim_region() and a humongous object allocation might force us
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2837 // to do a bit of unnecessary work (due to some unnecessary bitmap
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2838 // iterations) but it should not introduce and correctness issues.
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2839 HeapRegion* curr_region = _g1h->heap_region_containing_raw(finger);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2840 HeapWord* bottom = curr_region->bottom();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2841 HeapWord* end = curr_region->end();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2842 HeapWord* limit = curr_region->next_top_at_mark_start();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2843
3771 842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2844 if (verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	2845 gclog_or_tty->print_cr("[%u] curr_region = "PTR_FORMAT" "
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2846 "["PTR_FORMAT", "PTR_FORMAT"), "
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2847 "limit = "PTR_FORMAT,
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	2848 worker_id, curr_region, bottom, end, limit);
3771 842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2849 }
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2850
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2851 // Is the gap between reading the finger and doing the CAS too long?
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2852 HeapWord* res = (HeapWord*) Atomic::cmpxchg_ptr(end, &_finger, finger);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2853 if (res == finger) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2854 // we succeeded
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2855
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2856 // notice that _finger == end cannot be guaranteed here since,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2857 // someone else might have moved the finger even further
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	2858 assert(_finger >= end, "the finger should have moved forward");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2859
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	2860 if (verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	2861 gclog_or_tty->print_cr("[%u] we were successful with region = "
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	2862 PTR_FORMAT, worker_id, curr_region);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	2863 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2864
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2865 if (limit > bottom) {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	2866 if (verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	2867 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	2868 "returning it ", worker_id, curr_region);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	2869 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2870 return curr_region;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2871 } else {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	2872 assert(limit == bottom,
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	2873 "the region limit should be at bottom");
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	2874 if (verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	2875 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	2876 "returning NULL", worker_id, curr_region);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	2877 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2878 // we return NULL and the caller should try calling
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2879 // claim_region() again.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2880 return NULL;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2881 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2882 } else {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	2883 assert(_finger > finger, "the finger should have moved forward");
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	2884 if (verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	2885 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	2886 "global finger = "PTR_FORMAT", "
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2887 "our finger = "PTR_FORMAT,
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	2888 worker_id, _finger, finger);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	2889 }
342 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 // read it again
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2892 finger = _finger;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2893 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2894 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2895
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2896 return NULL;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2897 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2898
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2899 #ifndef PRODUCT
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2900 enum VerifyNoCSetOopsPhase {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2901 VerifyNoCSetOopsStack,
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2902 VerifyNoCSetOopsQueues,
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2903 VerifyNoCSetOopsSATBCompleted,
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2904 VerifyNoCSetOopsSATBThread
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
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2907 class VerifyNoCSetOopsClosure : public OopClosure, public ObjectClosure {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2908 private:
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2909 G1CollectedHeap* _g1h;
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2910 VerifyNoCSetOopsPhase _phase;
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2911 int _info;
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2912
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2913 const char* phase_str() {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2914 switch (_phase) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2915 case VerifyNoCSetOopsStack: return "Stack";
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2916 case VerifyNoCSetOopsQueues: return "Queue";
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2917 case VerifyNoCSetOopsSATBCompleted: return "Completed SATB Buffers";
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2918 case VerifyNoCSetOopsSATBThread: return "Thread SATB Buffers";
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2919 default: ShouldNotReachHere();
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2920 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2921 return NULL;
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2922 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2923
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2924 void do_object_work(oop obj) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2925 guarantee(!_g1h->obj_in_cs(obj),
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2926 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	2927 (void*) obj, phase_str(), _info));
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2928 }
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 public:
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2931 VerifyNoCSetOopsClosure() : _g1h(G1CollectedHeap::heap()) { }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2932
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2933 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	2934 _phase = phase;
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2935 _info = info;
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2936 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2937
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2938 virtual void do_oop(oop* p) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2939 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	2940 do_object_work(obj);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2941 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2942
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2943 virtual void do_oop(narrowOop* p) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2944 // 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	2945 // stacks and SATB buffers.
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2946 ShouldNotReachHere();
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2947 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2948
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2949 virtual void do_object(oop obj) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2950 do_object_work(obj);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2951 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2952 };
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2953
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2954 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	2955 bool verify_enqueued_buffers,
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2956 bool verify_thread_buffers,
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2957 bool verify_fingers) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2958 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	2959 if (!G1CollectedHeap::heap()->mark_in_progress()) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2960 return;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2961 }
1835 4805b9f4779e 6941395: G1: Use only lock-free versions of region stack push() and pop() johnc parents: 1833 diff changeset	2962
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2963 VerifyNoCSetOopsClosure cl;
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2964
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2965 if (verify_stacks) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2966 // Verify entries on the global mark stack
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2967 cl.set_phase(VerifyNoCSetOopsStack);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2968 _markStack.oops_do(&cl);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2969
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2970 // 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	2971 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	2972 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	2973 CMTaskQueue* queue = _task_queues->queue(i);
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2974 queue->oops_do(&cl);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2975 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2976 }
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 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	2979
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2980 // Verify entries on the enqueued SATB buffers
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2981 if (verify_enqueued_buffers) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2982 cl.set_phase(VerifyNoCSetOopsSATBCompleted);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2983 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	2984 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2985
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2986 // 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	2987 if (verify_thread_buffers) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2988 cl.set_phase(VerifyNoCSetOopsSATBThread);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2989 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	2990 }
4805b9f4779e 6941395: G1: Use only lock-free versions of region stack push() and pop() johnc parents: 1833 diff changeset	2991
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2992 if (verify_fingers) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2993 // Verify the global finger
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2994 HeapWord* global_finger = finger();
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2995 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	2996 // 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	2997 // 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	2998 // 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	2999 // which subsequently becomes continues humongous. If that
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3000 // 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	3001 // 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	3002 // not hold any more.
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3003 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	3004 guarantee(global_finger == global_hr->bottom(),
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3005 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	3006 global_finger, HR_FORMAT_PARAMS(global_hr)));
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3007 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3008
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3009 // Verify the task fingers
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3010 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	3011 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	3012 CMTask* task = _tasks[i];
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3013 HeapWord* task_finger = task->finger();
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3014 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	3015 // 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	3016 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	3017 guarantee(task_finger == task_hr->bottom() \|\|
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3018 !task_hr->in_collection_set(),
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3019 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	3020 task_finger, HR_FORMAT_PARAMS(task_hr)));
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3021 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3022 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3023 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3024 }
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3025 #endif // PRODUCT
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3026
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3027 // Aggregate the counting data that was constructed concurrently
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3028 // with marking.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3029 class AggregateCountDataHRClosure: public HeapRegionClosure {
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	3030 G1CollectedHeap* _g1h;
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3031 ConcurrentMark* _cm;
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	3032 CardTableModRefBS* _ct_bs;
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3033 BitMap* _cm_card_bm;
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3034 uint _max_worker_id;
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3035
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3036 public:
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	3037 AggregateCountDataHRClosure(G1CollectedHeap* g1h,
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3038 BitMap* cm_card_bm,
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3039 uint max_worker_id) :
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	3040 _g1h(g1h), _cm(g1h->concurrent_mark()),
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	3041 _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	3042 _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	3043
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3044 bool doHeapRegion(HeapRegion* hr) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3045 if (hr->continuesHumongous()) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3046 // 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	3047 // associated "starts humongous" region is processed.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3048 // Note that we cannot rely on their associated
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3049 // "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	3050 // 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	3051 // iteration, a "continues humongous" region might be visited
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3052 // before its associated "starts humongous".
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3053 return false;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3054 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3055
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3056 HeapWord* start = hr->bottom();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3057 HeapWord* limit = hr->next_top_at_mark_start();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3058 HeapWord* end = hr->end();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3059
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3060 assert(start <= limit && limit <= hr->top() && hr->top() <= hr->end(),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3061 err_msg("Preconditions not met - "
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3062 "start: "PTR_FORMAT", limit: "PTR_FORMAT", "
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3063 "top: "PTR_FORMAT", end: "PTR_FORMAT,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3064 start, limit, hr->top(), hr->end()));
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3065
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3066 assert(hr->next_marked_bytes() == 0, "Precondition");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3067
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3068 if (start == limit) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3069 // 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	3070 return false;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3071 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3072
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	3073 // 'start' should be in the heap.
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	3074 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	3075 // '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	3076 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	3077
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3078 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	3079 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	3080 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	3081
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	3082 // 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	3083 // 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	3084 // the object ending at ntams.
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	3085 // 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	3086 // 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	3087 // limit_idx will then correspond to a (non-existent) card
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	3088 // that is also outside the heap.
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	3089 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	3090 limit_idx += 1;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3091 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3092
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3093 assert(limit_idx <= end_idx, "or else use atomics");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3094
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3095 // 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	3096 uint hrs_index = hr->hrs_index();
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3097 size_t marked_bytes = 0;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3098
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3099 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	3100 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	3101 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	3102
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3103 // 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	3104 // add it to the running total for this region.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3105 marked_bytes += marked_bytes_array[hrs_index];
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3106
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3107 // 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	3108 // into the global card bitmap.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3109 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	3110
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3111 while (scan_idx < limit_idx) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3112 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	3113 _cm_card_bm->set_bit(scan_idx);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3114 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	3115
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3116 // 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	3117 // 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	3118 // 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	3119 // 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	3120 // passed in for left offset here.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3121 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	3122 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	3123 }
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 // Update the marked bytes for this region.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3127 hr->add_to_marked_bytes(marked_bytes);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3128
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3129 // Next heap region
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3130 return false;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3131 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3132 };
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3133
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3134 class G1AggregateCountDataTask: public AbstractGangTask {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3135 protected:
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3136 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 _active_workers;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3141
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3142 public:
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3143 G1AggregateCountDataTask(G1CollectedHeap* g1h,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3144 ConcurrentMark* cm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3145 BitMap* cm_card_bm,
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3146 uint max_worker_id,
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3147 int n_workers) :
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3148 AbstractGangTask("Count Aggregation"),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3149 _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	3150 _max_worker_id(max_worker_id),
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3151 _active_workers(n_workers) { }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3152
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3153 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	3154 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	3155
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3156 if (G1CollectedHeap::use_parallel_gc_threads()) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3157 _g1h->heap_region_par_iterate_chunked(&cl, worker_id,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3158 _active_workers,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3159 HeapRegion::AggregateCountClaimValue);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3160 } else {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3161 _g1h->heap_region_iterate(&cl);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3162 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3163 }
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
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3166
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3167 void ConcurrentMark::aggregate_count_data() {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3168 int n_workers = (G1CollectedHeap::use_parallel_gc_threads() ?
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3169 _g1h->workers()->active_workers() :
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3170 1);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3171
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3172 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	3173 _max_worker_id, n_workers);
4836 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 if (G1CollectedHeap::use_parallel_gc_threads()) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3176 assert(_g1h->check_heap_region_claim_values(HeapRegion::InitialClaimValue),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3177 "sanity check");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3178 _g1h->set_par_threads(n_workers);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3179 _g1h->workers()->run_task(&g1_par_agg_task);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3180 _g1h->set_par_threads(0);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3181
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3182 assert(_g1h->check_heap_region_claim_values(HeapRegion::AggregateCountClaimValue),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3183 "sanity check");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3184 _g1h->reset_heap_region_claim_values();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3185 } else {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3186 g1_par_agg_task.work(0);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3187 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3188 }
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 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	3191 void ConcurrentMark::clear_all_count_data() {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3192 // 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	3193 // liveness count aggregation (during remark) and the
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3194 // final counting task.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3195 _card_bm.clear();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3196
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3197 // 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	3198 // of the final counting task.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3199 _region_bm.clear();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3200
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	3201 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	3202 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	3203
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3204 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	3205 BitMap* task_card_bm = count_card_bitmap_for(i);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3206 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	3207
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3208 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	3209 assert(marked_bytes_array != NULL, "uninitialized");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3210
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	3211 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	3212 task_card_bm->clear();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3213 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3214 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3215
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3216 void ConcurrentMark::print_stats() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3217 if (verbose_stats()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3218 gclog_or_tty->print_cr("---------------------------------------------------------------------");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3219 for (size_t i = 0; i < _active_tasks; ++i) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3220 _tasks[i]->print_stats();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3221 gclog_or_tty->print_cr("---------------------------------------------------------------------");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3222 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3223 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3224 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3225
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3226 // abandon current marking iteration due to a Full GC
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3227 void ConcurrentMark::abort() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3228 // Clear all marks to force marking thread to do nothing
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3229 _nextMarkBitMap->clearAll();
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3230 // Clear the liveness counting data
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3231 clear_all_count_data();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3232 // Empty mark stack
7450 d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	3233 reset_marking_state();
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3234 for (uint i = 0; i < _max_worker_id; ++i) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3235 _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	3236 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3237 _has_aborted = true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3238
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3239 SATBMarkQueueSet& satb_mq_set = JavaThread::satb_mark_queue_set();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3240 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	3241 // 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	3242 // 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	3243 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	3244 false, /* new active value */
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1314 diff changeset	3245 satb_mq_set.is_active() /* expected_active */);
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	3246
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	3247 _g1h->trace_heap_after_concurrent_cycle();
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	3248 _g1h->register_concurrent_cycle_end();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3249 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3250
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3251 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	3252 NumberSeq& ns) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3253 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	3254 prefix, ns.num(), name, ns.sum()/1000.0, ns.avg());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3255 if (ns.num() > 0) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3256 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	3257 prefix, ns.sd(), ns.maximum());
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 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3260
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3261 void ConcurrentMark::print_summary_info() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3262 gclog_or_tty->print_cr(" Concurrent marking:");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3263 print_ms_time_info(" ", "init marks", _init_times);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3264 print_ms_time_info(" ", "remarks", _remark_times);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3265 {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3266 print_ms_time_info(" ", "final marks", _remark_mark_times);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3267 print_ms_time_info(" ", "weak refs", _remark_weak_ref_times);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3268
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3269 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3270 print_ms_time_info(" ", "cleanups", _cleanup_times);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3271 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	3272 _total_counting_time,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3273 (_cleanup_times.num() > 0 ? _total_counting_time * 1000.0 /
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3274 (double)_cleanup_times.num()
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3275 : 0.0));
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3276 if (G1ScrubRemSets) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3277 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	3278 _total_rs_scrub_time,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3279 (_cleanup_times.num() > 0 ? _total_rs_scrub_time * 1000.0 /
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3280 (double)_cleanup_times.num()
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3281 : 0.0));
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3282 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3283 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	3284 (_init_times.sum() + _remark_times.sum() +
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3285 _cleanup_times.sum())/1000.0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3286 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	3287 "(%8.2f s marking).",
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3288 cmThread()->vtime_accum(),
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3289 cmThread()->vtime_mark_accum());
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3290 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3291
1019 035d2e036a9b 6885041: G1: inconsistent thread dump tonyp parents: 993 diff changeset	3292 void ConcurrentMark::print_worker_threads_on(outputStream* st) const {
8008 256d3f43c177 8005875: G1: Kitchensink fails with ParallelGCThreads=0 johnc parents: 8006 diff changeset	3293 if (use_parallel_marking_threads()) {
256d3f43c177 8005875: G1: Kitchensink fails with ParallelGCThreads=0 johnc parents: 8006 diff changeset	3294 _parallel_workers->print_worker_threads_on(st);
256d3f43c177 8005875: G1: Kitchensink fails with ParallelGCThreads=0 johnc parents: 8006 diff changeset	3295 }
1019 035d2e036a9b 6885041: G1: inconsistent thread dump tonyp parents: 993 diff changeset	3296 }
035d2e036a9b 6885041: G1: inconsistent thread dump tonyp parents: 993 diff changeset	3297
9076 7b835924c31c 8011872: Include Bit Map addresses in the hs_err files stefank parents: 8789 diff changeset	3298 void ConcurrentMark::print_on_error(outputStream* st) const {
7b835924c31c 8011872: Include Bit Map addresses in the hs_err files stefank parents: 8789 diff changeset	3299 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	3300 _prevMarkBitMap, _nextMarkBitMap);
7b835924c31c 8011872: Include Bit Map addresses in the hs_err files stefank parents: 8789 diff changeset	3301 _prevMarkBitMap->print_on_error(st, " Prev Bits: ");
7b835924c31c 8011872: Include Bit Map addresses in the hs_err files stefank parents: 8789 diff changeset	3302 _nextMarkBitMap->print_on_error(st, " Next Bits: ");
7b835924c31c 8011872: Include Bit Map addresses in the hs_err files stefank parents: 8789 diff changeset	3303 }
7b835924c31c 8011872: Include Bit Map addresses in the hs_err files stefank parents: 8789 diff changeset	3304
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3305 // 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	3306 bool ConcurrentMark::do_yield_check(uint worker_id) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3307 if (should_yield()) {
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	3308 if (worker_id == 0) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3309 _g1h->g1_policy()->record_concurrent_pause();
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3310 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3311 cmThread()->yield();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3312 return true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3313 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3314 return false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3315 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3316 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3317
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3318 bool ConcurrentMark::should_yield() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3319 return cmThread()->should_yield();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3320 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3321
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3322 bool ConcurrentMark::containing_card_is_marked(void* p) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3323 size_t offset = pointer_delta(p, _g1h->reserved_region().start(), 1);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3324 return _card_bm.at(offset >> CardTableModRefBS::card_shift);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3325 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3326
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3327 bool ConcurrentMark::containing_cards_are_marked(void* start,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3328 void* last) {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3329 return containing_card_is_marked(start) &&
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3330 containing_card_is_marked(last);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3331 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3332
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3333 #ifndef PRODUCT
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3334 // for debugging purposes
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3335 void ConcurrentMark::print_finger() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3336 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	3337 _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	3338 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	3339 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	3340 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3341 gclog_or_tty->print_cr("");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3342 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3343 #endif
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3344
3771 842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3345 void CMTask::scan_object(oop obj) {
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3346 assert(_nextMarkBitMap->isMarked((HeapWord*) obj), "invariant");
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3347
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3348 if (_cm->verbose_high()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3349 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	3350 _worker_id, (void*) obj);
3771 842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3351 }
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3352
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3353 size_t obj_size = obj->size();
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3354 _words_scanned += obj_size;
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3355
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3356 obj->oop_iterate(_cm_oop_closure);
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3357 statsOnly( ++_objs_scanned );
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3358 check_limits();
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3359 }
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3360
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3361 // Closure for iteration over bitmaps
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3362 class CMBitMapClosure : public BitMapClosure {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3363 private:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3364 // the bitmap that is being iterated over
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3365 CMBitMap* _nextMarkBitMap;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3366 ConcurrentMark* _cm;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3367 CMTask* _task;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3368
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3369 public:
5988 2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	3370 CMBitMapClosure(CMTask task, ConcurrentMark cm, CMBitMap* nextMarkBitMap) :
2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	3371 _task(task), _cm(cm), _nextMarkBitMap(nextMarkBitMap) { }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3372
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3373 bool do_bit(size_t offset) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3374 HeapWord* addr = _nextMarkBitMap->offsetToHeapWord(offset);
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3375 assert(_nextMarkBitMap->isMarked(addr), "invariant");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3376 assert( addr < _cm->finger(), "invariant");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3377
5988 2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	3378 statsOnly( _task->increase_objs_found_on_bitmap() );
2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	3379 assert(addr >= _task->finger(), "invariant");
2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	3380
2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	3381 // We move that task's local finger along.
2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	3382 _task->move_finger_to(addr);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3383
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3384 _task->scan_object(oop(addr));
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3385 // we only partially drain the local queue and global stack
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3386 _task->drain_local_queue(true);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3387 _task->drain_global_stack(true);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3388
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3389 // 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	3390 // the iteration
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3391 return !_task->has_aborted();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3392 }
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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3395 // Closure for iterating over objects, currently only used for
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3396 // processing SATB buffers.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3397 class CMObjectClosure : public ObjectClosure {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3398 private:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3399 CMTask* _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 public:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3402 void do_object(oop obj) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3403 _task->deal_with_reference(obj);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3404 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3405
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3406 CMObjectClosure(CMTask* task) : _task(task) { }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3407 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3408
3771 842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3409 G1CMOopClosure::G1CMOopClosure(G1CollectedHeap* g1h,
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3410 ConcurrentMark* cm,
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3411 CMTask* task)
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3412 : _g1h(g1h), _cm(cm), _task(task) {
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3413 assert(_ref_processor == NULL, "should be initialized to NULL");
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3414
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3415 if (G1UseConcMarkReferenceProcessing) {
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	3416 _ref_processor = g1h->ref_processor_cm();
3771 842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3417 assert(_ref_processor != NULL, "should not be NULL");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3418 }
3771 842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3419 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3420
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3421 void CMTask::setup_for_region(HeapRegion* hr) {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3422 // Separated the asserts so that we know which one fires.
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3423 assert(hr != NULL,
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3424 "claim_region() should have filtered out continues humongous regions");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3425 assert(!hr->continuesHumongous(),
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3426 "claim_region() should have filtered out continues humongous regions");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3427
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3428 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3429 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	3430 _worker_id, hr);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3431 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3432
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3433 _curr_region = hr;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3434 _finger = hr->bottom();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3435 update_region_limit();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3436 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3437
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3438 void CMTask::update_region_limit() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3439 HeapRegion* hr = _curr_region;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3440 HeapWord* bottom = hr->bottom();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3441 HeapWord* limit = hr->next_top_at_mark_start();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3442
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3443 if (limit == bottom) {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3444 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3445 gclog_or_tty->print_cr("[%u] found an empty region "
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3446 "["PTR_FORMAT", "PTR_FORMAT")",
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3447 _worker_id, bottom, limit);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3448 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3449 // The region was collected underneath our feet.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3450 // We set the finger to bottom to ensure that the bitmap
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3451 // iteration that will follow this will not do anything.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3452 // (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	3453 // 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	3454 _finger = bottom;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3455 } else if (limit >= _region_limit) {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3456 assert(limit >= _finger, "peace of mind");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3457 } else {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3458 assert(limit < _region_limit, "only way to get here");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3459 // This can happen under some pretty unusual circumstances. An
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3460 // evacuation pause empties the region underneath our feet (NTAMS
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3461 // at bottom). We then do some allocation in the region (NTAMS
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3462 // 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	3463 // alloc region (NTAMS will move to top() and the objects
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3464 // originally below it will be grayed). All objects now marked in
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3465 // the region are explicitly grayed, if below the global finger,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3466 // 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	3467 // set _finger to be limit to ensure that the bitmap iteration
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3468 // doesn't do anything.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3469 _finger = limit;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3470 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3471
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3472 _region_limit = limit;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3473 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3474
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3475 void CMTask::giveup_current_region() {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3476 assert(_curr_region != NULL, "invariant");
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3477 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3478 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	3479 _worker_id, _curr_region);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3480 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3481 clear_region_fields();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3482 }
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 void CMTask::clear_region_fields() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3485 // Values for these three fields that indicate that we're not
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3486 // holding on to a region.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3487 _curr_region = NULL;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3488 _finger = NULL;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3489 _region_limit = NULL;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3490 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3491
3771 842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3492 void CMTask::set_cm_oop_closure(G1CMOopClosure* cm_oop_closure) {
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3493 if (cm_oop_closure == NULL) {
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3494 assert(_cm_oop_closure != NULL, "invariant");
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3495 } else {
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3496 assert(_cm_oop_closure == NULL, "invariant");
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3497 }
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3498 _cm_oop_closure = cm_oop_closure;
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3499 }
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3500
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3501 void CMTask::reset(CMBitMap* nextMarkBitMap) {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3502 guarantee(nextMarkBitMap != NULL, "invariant");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3503
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3504 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3505 gclog_or_tty->print_cr("[%u] resetting", _worker_id);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3506 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3507
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3508 _nextMarkBitMap = nextMarkBitMap;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3509 clear_region_fields();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3510
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3511 _calls = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3512 _elapsed_time_ms = 0.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3513 _termination_time_ms = 0.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3514 _termination_start_time_ms = 0.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3515
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3516 #if _MARKING_STATS_
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3517 _local_pushes = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3518 _local_pops = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3519 _local_max_size = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3520 _objs_scanned = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3521 _global_pushes = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3522 _global_pops = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3523 _global_max_size = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3524 _global_transfers_to = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3525 _global_transfers_from = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3526 _regions_claimed = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3527 _objs_found_on_bitmap = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3528 _satb_buffers_processed = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3529 _steal_attempts = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3530 _steals = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3531 _aborted = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3532 _aborted_overflow = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3533 _aborted_cm_aborted = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3534 _aborted_yield = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3535 _aborted_timed_out = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3536 _aborted_satb = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3537 _aborted_termination = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3538 #endif // _MARKING_STATS_
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3539 }
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 bool CMTask::should_exit_termination() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3542 regular_clock_call();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3543 // 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	3544 // 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	3545 // 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	3546 return !_cm->mark_stack_empty() \|\| has_aborted();
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::reached_limit() {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3550 assert(_words_scanned >= _words_scanned_limit \|\|
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3551 _refs_reached >= _refs_reached_limit ,
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3552 "shouldn't have been called otherwise");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3553 regular_clock_call();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3554 }
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 void CMTask::regular_clock_call() {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3557 if (has_aborted()) return;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3558
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3559 // First, we need to recalculate the words scanned and refs reached
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3560 // limits for the next clock call.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3561 recalculate_limits();
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 // During the regular clock call we do the following
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3564
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3565 // (1) If an overflow has been flagged, then we abort.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3566 if (_cm->has_overflown()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3567 set_has_aborted();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3568 return;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3569 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3570
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3571 // 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	3572 // to check anything else. The other steps are only needed during
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3573 // the concurrent marking phase.
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3574 if (!concurrent()) return;
342 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 // (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	3577 if (_cm->has_aborted()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3578 set_has_aborted();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3579 statsOnly( ++_aborted_cm_aborted );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3580 return;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3581 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3582
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3583 double curr_time_ms = os::elapsedVTime() * 1000.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3584
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3585 // (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	3586 #if _MARKING_STATS_
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3587 if (_words_scanned >= _words_scanned_limit) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3588 ++_clock_due_to_scanning;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3589 }
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3590 if (_refs_reached >= _refs_reached_limit) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3591 ++_clock_due_to_marking;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3592 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3593
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3594 double last_interval_ms = curr_time_ms - _interval_start_time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3595 _interval_start_time_ms = curr_time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3596 _all_clock_intervals_ms.add(last_interval_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3597
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3598 if (_cm->verbose_medium()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3599 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	3600 "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	3601 _worker_id, last_interval_ms,
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3602 _words_scanned,
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3603 (_words_scanned >= _words_scanned_limit) ? " (*)" : "",
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3604 _refs_reached,
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3605 (_refs_reached >= _refs_reached_limit) ? " (*)" : "");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3606 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3607 #endif // _MARKING_STATS_
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3608
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3609 // (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	3610 if (_cm->should_yield()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3611 // 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	3612 // responsible for yielding.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3613 set_has_aborted();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3614 statsOnly( ++_aborted_yield );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3615 return;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3616 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3617
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3618 // (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	3619 // then we abort.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3620 double elapsed_time_ms = curr_time_ms - _start_time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3621 if (elapsed_time_ms > _time_target_ms) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3622 set_has_aborted();
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	3623 _has_timed_out = true;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3624 statsOnly( ++_aborted_timed_out );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3625 return;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3626 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3627
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3628 // (6) Finally, we check whether there are enough completed STAB
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3629 // buffers available for processing. If there are, we abort.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3630 SATBMarkQueueSet& satb_mq_set = JavaThread::satb_mark_queue_set();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3631 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	3632 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3633 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	3634 _worker_id);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3635 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3636 // 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	3637 // the marking task to do so
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3638 set_has_aborted();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3639 statsOnly( ++_aborted_satb );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3640 return;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3641 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3642 }
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 void CMTask::recalculate_limits() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3645 _real_words_scanned_limit = _words_scanned + words_scanned_period;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3646 _words_scanned_limit = _real_words_scanned_limit;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3647
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3648 _real_refs_reached_limit = _refs_reached + refs_reached_period;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3649 _refs_reached_limit = _real_refs_reached_limit;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3650 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3651
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3652 void CMTask::decrease_limits() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3653 // 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	3654 // 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	3655 // 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	3656 // scanning limit so that the clock is called earlier.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3657
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3658 if (_cm->verbose_medium()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3659 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	3660 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3661
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3662 _words_scanned_limit = _real_words_scanned_limit -
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3663 3 * words_scanned_period / 4;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3664 _refs_reached_limit = _real_refs_reached_limit -
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3665 3 * refs_reached_period / 4;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3666 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3667
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3668 void CMTask::move_entries_to_global_stack() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3669 // 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	3670 // from the local queue
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3671 oop buffer[global_stack_transfer_size];
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 int n = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3674 oop obj;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3675 while (n < global_stack_transfer_size && _task_queue->pop_local(obj)) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3676 buffer[n] = obj;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3677 ++n;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3678 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3679
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3680 if (n > 0) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3681 // we popped at least one entry from the local queue
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3682
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3683 statsOnly( ++_global_transfers_to; _local_pops += n );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3684
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3685 if (!_cm->mark_stack_push(buffer, n)) {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3686 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3687 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	3688 _worker_id);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3689 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3690 set_has_aborted();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3691 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3692 // the transfer was successful
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3693
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3694 if (_cm->verbose_medium()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3695 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	3696 _worker_id, n);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3697 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3698 statsOnly( int tmp_size = _cm->mark_stack_size();
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3699 if (tmp_size > _global_max_size) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3700 _global_max_size = tmp_size;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3701 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3702 _global_pushes += n );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3703 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3704 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3705
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3706 // this operation was quite expensive, so decrease the limits
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3707 decrease_limits();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3708 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3709
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3710 void CMTask::get_entries_from_global_stack() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3711 // 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	3712 // from the global stack.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3713 oop buffer[global_stack_transfer_size];
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3714 int n;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3715 _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	3716 assert(n <= global_stack_transfer_size,
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3717 "we should not pop more than the given limit");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3718 if (n > 0) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3719 // yes, we did actually pop at least one entry
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3720
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3721 statsOnly( ++_global_transfers_from; _global_pops += n );
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3722 if (_cm->verbose_medium()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3723 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	3724 _worker_id, n);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3725 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3726 for (int i = 0; i < n; ++i) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3727 bool success = _task_queue->push(buffer[i]);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3728 // 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	3729 // 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	3730 assert(success, "invariant");
342 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 statsOnly( int tmp_size = _task_queue->size();
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3734 if (tmp_size > _local_max_size) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3735 _local_max_size = tmp_size;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3736 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3737 _local_pushes += n );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3738 }
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 // this operation was quite expensive, so decrease the limits
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3741 decrease_limits();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3742 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3743
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3744 void CMTask::drain_local_queue(bool partially) {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3745 if (has_aborted()) return;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3746
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3747 // 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	3748 // 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	3749 // of things to do) or totally (at the very end).
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3750 size_t target_size;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3751 if (partially) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3752 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	3753 } else {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3754 target_size = 0;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3755 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3756
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3757 if (_task_queue->size() > target_size) {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3758 if (_cm->verbose_high()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3759 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	3760 _worker_id, target_size);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3761 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3762
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3763 oop obj;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3764 bool ret = _task_queue->pop_local(obj);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3765 while (ret) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3766 statsOnly( ++_local_pops );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3767
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3768 if (_cm->verbose_high()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3769 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	3770 (void*) obj);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3771 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3772
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3773 assert(_g1h->is_in_g1_reserved((HeapWord*) obj), "invariant" );
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2177 diff changeset	3774 assert(!_g1h->is_on_master_free_list(
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	3775 _g1h->heap_region_containing((HeapWord*) obj)), "invariant");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3776
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3777 scan_object(obj);
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 (_task_queue->size() <= target_size \|\| has_aborted()) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3780 ret = false;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3781 } else {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3782 ret = _task_queue->pop_local(obj);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3783 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3784 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3785
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3786 if (_cm->verbose_high()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3787 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	3788 _worker_id, _task_queue->size());
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3789 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3790 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3791 }
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 void CMTask::drain_global_stack(bool partially) {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3794 if (has_aborted()) return;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3795
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3796 // 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	3797 // drain the global stack.
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3798 assert(partially \|\| _task_queue->size() == 0, "invariant");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3799
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3800 // 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	3801 // 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	3802 // 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	3803 // because we move entries from the global stack in chunks or
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3804 // 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	3805 // drop below the target. But, this is not a problem.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3806 size_t target_size;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3807 if (partially) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3808 target_size = _cm->partial_mark_stack_size_target();
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3809 } else {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3810 target_size = 0;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3811 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3812
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3813 if (_cm->mark_stack_size() > target_size) {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3814 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3815 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	3816 _worker_id, target_size);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3817 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3818
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3819 while (!has_aborted() && _cm->mark_stack_size() > target_size) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3820 get_entries_from_global_stack();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3821 drain_local_queue(partially);
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
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3824 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3825 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	3826 _worker_id, _cm->mark_stack_size());
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3827 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3828 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3829 }
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 // 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	3832 // 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	3833 // replicated. We should really get rid of the single-threaded version
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3834 // of the code to simplify things.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3835 void CMTask::drain_satb_buffers() {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3836 if (has_aborted()) return;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3837
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3838 // 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	3839 // 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	3840 // notices that SATB buffers are available for draining. It'd be
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3841 // very counter productive if it did that. :-)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3842 _draining_satb_buffers = true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3843
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3844 CMObjectClosure oc(this);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3845 SATBMarkQueueSet& satb_mq_set = JavaThread::satb_mark_queue_set();
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3846 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	3847 satb_mq_set.set_par_closure(_worker_id, &oc);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3848 } else {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3849 satb_mq_set.set_closure(&oc);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3850 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3851
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3852 // This keeps claiming and applying the closure to completed buffers
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3853 // 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	3854 if (G1CollectedHeap::use_parallel_gc_threads()) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3855 while (!has_aborted() &&
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3856 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	3857 if (_cm->verbose_medium()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3858 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	3859 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3860 statsOnly( ++_satb_buffers_processed );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3861 regular_clock_call();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3862 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3863 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3864 while (!has_aborted() &&
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3865 satb_mq_set.apply_closure_to_completed_buffer()) {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3866 if (_cm->verbose_medium()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3867 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	3868 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3869 statsOnly( ++_satb_buffers_processed );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3870 regular_clock_call();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3871 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3872 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3873
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3874 if (!concurrent() && !has_aborted()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3875 // We should only do this during remark.
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3876 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	3877 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	3878 } else {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3879 satb_mq_set.iterate_closure_all_threads();
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3880 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3881 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3882
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3883 _draining_satb_buffers = false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3884
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3885 assert(has_aborted() \|\|
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3886 concurrent() \|\|
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3887 satb_mq_set.completed_buffers_num() == 0, "invariant");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3888
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3889 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	3890 satb_mq_set.set_par_closure(_worker_id, NULL);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3891 } else {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3892 satb_mq_set.set_closure(NULL);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3893 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3894
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3895 // again, this was a potentially expensive operation, decrease the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3896 // limits to get the regular clock call early
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3897 decrease_limits();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3898 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3899
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3900 void CMTask::print_stats() {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3901 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	3902 _worker_id, _calls);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3903 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	3904 _elapsed_time_ms, _termination_time_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3905 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	3906 _step_times_ms.num(), _step_times_ms.avg(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3907 _step_times_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 _step_times_ms.maximum(), _step_times_ms.sum());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3910
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3911 #if _MARKING_STATS_
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3912 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	3913 _all_clock_intervals_ms.num(), _all_clock_intervals_ms.avg(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3914 _all_clock_intervals_ms.sd());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3915 gclog_or_tty->print_cr(" max = %1.2lfms, total = %1.2lfms",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3916 _all_clock_intervals_ms.maximum(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3917 _all_clock_intervals_ms.sum());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3918 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	3919 _clock_due_to_scanning, _clock_due_to_marking);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3920 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	3921 _objs_scanned, _objs_found_on_bitmap);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3922 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	3923 _local_pushes, _local_pops, _local_max_size);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3924 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	3925 _global_pushes, _global_pops, _global_max_size);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3926 gclog_or_tty->print_cr(" transfers to = %d, transfers from = %d",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3927 _global_transfers_to,_global_transfers_from);
5988 2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	3928 gclog_or_tty->print_cr(" Regions: claimed = %d", _regions_claimed);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3929 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	3930 gclog_or_tty->print_cr(" Steals: attempts = %d, successes = %d",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3931 _steal_attempts, _steals);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3932 gclog_or_tty->print_cr(" Aborted: %d, due to", _aborted);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3933 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	3934 _aborted_overflow, _aborted_cm_aborted, _aborted_yield);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3935 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	3936 _aborted_timed_out, _aborted_satb, _aborted_termination);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3937 #endif // _MARKING_STATS_
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3938 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3939
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3940 /*****************************************************************************
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3941
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	3942 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	3943 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	3944 with other invocations of do_marking_step() on different tasks
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3945 (but only one per task, obviously) and concurrently with the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3946 mutator threads, or during remark, hence it eliminates the need
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3947 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	3948 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	3949 phase. Interestingly, tasks are also claimable during evacuation
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3950 pauses too, since do_marking_step() ensures that it aborts before
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3951 it needs to yield.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3952
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	3953 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	3954 following:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3955
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3956 (1) Marking Bitmap. If there are gray objects that appear only
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3957 on the bitmap (this happens either when dealing with an overflow
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3958 or when the initial marking phase has simply marked the roots
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3959 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	3960 regions whose bitmap they then scan to find gray objects. A
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3961 global finger indicates where the end of the last claimed region
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3962 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	3963 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	3964 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	3965 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	3966 pushed on a stack).
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3967
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3968 (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	3969 reasonably efficiently by the task. Other tasks can steal from
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3970 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	3971 task attempts to keep its local queue short but not totally
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3972 empty, so that entries are available for stealing by other
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3973 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	3974 drain its local queue.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3975
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3976 (3) Global Mark Stack. This handles local queue overflow. During
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3977 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	3978 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	3979 interaction with it which might cause contention. If it
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3980 overflows, then the marking phase should restart and iterate
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3981 over the bitmap to identify gray objects. Throughout the marking
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3982 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	3983 length but not totally empty, so that entries are available for
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3984 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	3985 will totally drain the global mark stack.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3986
5988 2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	3987 (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	3988 made available. Buffers are regularly removed from this queue
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3989 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	3990 long. During remark, all completed buffers are processed, as
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3991 well as the filled in parts of any uncompleted buffers.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3992
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3993 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	3994 has been reached. There are a few other cases when the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3995 do_marking_step() method also aborts:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3996
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3997 (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	3998
5988 2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	3999 (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	4000 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	4001 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	4002 (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	4003 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	4004 immediately restart.
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4005
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4006 (3) When enough completed SATB buffers are available. The
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4007 do_marking_step() method only tries to drain SATB buffers right
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4008 at the beginning. So, if enough buffers are available, the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4009 marking step aborts and the SATB buffers are processed at
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4010 the beginning of the next invocation.
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 (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	4013 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	4014 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	4015 happens then objects will be compacted underneath our feet, the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4016 heap might shrink, etc. We save checking for this by just
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4017 aborting and doing the yield right at the end.
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 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	4020 be called in a loop (or, otherwise, regularly) until it completes.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4021
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4022 If a marking step completes without its has_aborted() flag being
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4023 true, it means it has completed the current marking phase (and
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4024 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	4025
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4026 A method called regular_clock_call() is invoked "regularly" (in
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4027 sub ms intervals) throughout marking. It is this clock method that
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4028 checks all the abort conditions which were mentioned above and
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4029 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	4030 trigger this clock method: when the number of object words the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4031 marking phase has scanned or the number of references the marking
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4032 phase has visited reach a given limit. Additional invocations to
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4033 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	4034 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	4035 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	4036 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	4037 too and not constantly check them throughout the code.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4038
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4039 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	4040 termination protocol.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4041
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4042 The value of is_serial must be true when do_marking_step is being
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4043 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	4044 skip any synchronization in the termination and overflow code.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4045 Examples include the serial remark code and the serial reference
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4046 processing closures.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4047
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4048 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	4049 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	4050 Examples include the concurrent marking code (CMMarkingTask),
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4051 the MT remark code, and the MT reference processing closures.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4052
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4053 *****************************************************************************/
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4054
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	4055 void CMTask::do_marking_step(double time_target_ms,
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4056 bool do_termination,
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4057 bool is_serial) {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4058 assert(time_target_ms >= 1.0, "minimum granularity is 1ms");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4059 assert(concurrent() == _cm->concurrent(), "they should be the same");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4060
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4061 G1CollectorPolicy* g1_policy = _g1h->g1_policy();
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4062 assert(_task_queues != NULL, "invariant");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4063 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	4064 assert(_task_queues->queue(_worker_id) == _task_queue, "invariant");
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4065
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4066 assert(!_claimed,
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4067 "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	4068
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4069 // 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	4070 // 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	4071 // 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	4072 // catch most problems.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4073 _claimed = true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4074
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4075 _start_time_ms = os::elapsedVTime() * 1000.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4076 statsOnly( _interval_start_time_ms = _start_time_ms );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4077
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4078 // 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	4079 // 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	4080 // enable stealing when the termination protocol is enabled
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4081 // and do_marking_step() is not being called serially.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4082 bool do_stealing = do_termination && !is_serial;
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4083
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4084 double diff_prediction_ms =
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4085 g1_policy->get_new_prediction(&_marking_step_diffs_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4086 _time_target_ms = time_target_ms - diff_prediction_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4087
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4088 // 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	4089 // call the regular clock method
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4090 _words_scanned = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4091 _refs_reached = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4092 recalculate_limits();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4093
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4094 // clear all flags
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4095 clear_has_aborted();
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	4096 _has_timed_out = false;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4097 _draining_satb_buffers = false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4098
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4099 ++_calls;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4100
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4101 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4102 gclog_or_tty->print_cr("[%u] >>>>>>>>>> START, call = %d, "
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4103 "target = %1.2lfms >>>>>>>>>>",
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4104 _worker_id, _calls, _time_target_ms);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4105 }
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 // 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	4108 // 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	4109 // statically.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4110 CMBitMapClosure bitmap_closure(this, _cm, _nextMarkBitMap);
3771 842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	4111 G1CMOopClosure cm_oop_closure(_g1h, _cm, this);
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	4112 set_cm_oop_closure(&cm_oop_closure);
342 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 if (_cm->has_overflown()) {
5988 2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	4115 // 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	4116 // 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	4117 // 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	4118 // right at the end of this task.
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4119 set_has_aborted();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4120 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4121
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4122 // First drain any available SATB buffers. After this, we will not
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4123 // look at SATB buffers before the next invocation of this method.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4124 // If enough completed SATB buffers are queued up, the regular clock
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4125 // will abort this task so that it restarts.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4126 drain_satb_buffers();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4127 // ...then partially drain the local queue and the global stack
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4128 drain_local_queue(true);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4129 drain_global_stack(true);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4130
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4131 do {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4132 if (!has_aborted() && _curr_region != NULL) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4133 // 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	4134 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	4135 "should not be NULL either");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4136
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4137 // We might have restarted this task after an evacuation pause
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4138 // which might have evacuated the region we're holding on to
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4139 // 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	4140 // 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	4141 // contains garbage (update_region_limit() will also move
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4142 // _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	4143 update_region_limit();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4144 // 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	4145 // as we might be restarting this task after aborting half-way
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4146 // through scanning this region. In this case, _finger points to
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4147 // 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	4148 // fresh region, _finger points to start().
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4149 MemRegion mr = MemRegion(_finger, _region_limit);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4150
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4151 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4152 gclog_or_tty->print_cr("[%u] we're scanning part "
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4153 "["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	4154 "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	4155 _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	4156 HR_FORMAT_PARAMS(_curr_region));
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4157 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4158
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	4159 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	4160 "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	4161
5e401ef52ec0 8007772: G1: assert(!hr->isHumongous() \|\| mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions johnc parents: 8034 diff changeset	4162 // 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	4163 // 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	4164 // 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	4165 // 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	4166 // 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	4167 // 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	4168 // that is left.
8034 bce1ac447f6b 7052429: G1: Avoid unnecessary scanning of humongous regions during concurrent marking johnc parents: 8014 diff changeset	4169 // 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	4170 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	4171 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	4172 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	4173 } 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	4174 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	4175 // 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	4176 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	4177 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	4178 }
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	4179 // 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	4180 // 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	4181 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	4182 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	4183 } else if (_nextMarkBitMap->iterate(&bitmap_closure, mr)) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4184 giveup_current_region();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4185 regular_clock_call();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4186 } else {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4187 assert(has_aborted(), "currently the only way to do so");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4188 // The only way to abort the bitmap iteration is to return
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4189 // false from the do_bit() method. However, inside the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4190 // do_bit() method we move the _finger to point to the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4191 // object currently being looked at. So, if we bail out, we
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4192 // have definitely set _finger to something non-null.
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4193 assert(_finger != NULL, "invariant");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4194
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4195 // Region iteration was actually aborted. So now _finger
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4196 // 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	4197 // leave it there, when we restart this task, we will rescan
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4198 // 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	4199 // enough to point to the next possible object header (the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4200 // 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	4201 // granularity).
1314 3f0549ed0c98 6921710: G1: assert(new_finger >= _finger && new_finger < _region_limit,"invariant") apetrusenko parents: 1284 diff changeset	4202 assert(_finger < _region_limit, "invariant");
8733 9def4075da6d 8008079: G1: Add nextObject routine to CMBitMapRO and replace nextWord tamao parents: 8039 diff changeset	4203 HeapWord* new_finger = _nextMarkBitMap->nextObject(_finger);
1314 3f0549ed0c98 6921710: G1: assert(new_finger >= _finger && new_finger < _region_limit,"invariant") apetrusenko parents: 1284 diff changeset	4204 // 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	4205 if (new_finger >= _region_limit) {
5988 2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	4206 giveup_current_region();
1314 3f0549ed0c98 6921710: G1: assert(new_finger >= _finger && new_finger < _region_limit,"invariant") apetrusenko parents: 1284 diff changeset	4207 } else {
5988 2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	4208 move_finger_to(new_finger);
1314 3f0549ed0c98 6921710: G1: assert(new_finger >= _finger && new_finger < _region_limit,"invariant") apetrusenko parents: 1284 diff changeset	4209 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4210 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4211 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4212 // At this point we have either completed iterating over the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4213 // region we were holding on to, or we have aborted.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4214
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4215 // We then partially drain the local queue and the global stack.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4216 // (Do we really need this?)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4217 drain_local_queue(true);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4218 drain_global_stack(true);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4219
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4220 // 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	4221 // return NULL with potentially more regions available for
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4222 // 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	4223 // whether we're done or not.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4224 while (!has_aborted() && _curr_region == NULL && !_cm->out_of_regions()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4225 // 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	4226 // given up on the previous one.
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4227 // Separated the asserts so that we know which one fires.
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4228 assert(_curr_region == NULL, "invariant");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4229 assert(_finger == NULL, "invariant");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4230 assert(_region_limit == NULL, "invariant");
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4231 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4232 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	4233 }
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4234 HeapRegion* claimed_region = _cm->claim_region(_worker_id);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4235 if (claimed_region != NULL) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4236 // Yes, we managed to claim one
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4237 statsOnly( ++_regions_claimed );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4238
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4239 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4240 gclog_or_tty->print_cr("[%u] we successfully claimed "
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4241 "region "PTR_FORMAT,
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4242 _worker_id, claimed_region);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4243 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4244
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4245 setup_for_region(claimed_region);
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4246 assert(_curr_region == claimed_region, "invariant");
342 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 // 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	4249 // 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	4250 // 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	4251 // method once round the loop to make sure it's called
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4252 // frequently enough.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4253 regular_clock_call();
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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4256 if (!has_aborted() && _curr_region == NULL) {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4257 assert(_cm->out_of_regions(),
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4258 "at this point we should be out of regions");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4259 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4260 } while ( _curr_region != NULL && !has_aborted());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4261
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4262 if (!has_aborted()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4263 // 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	4264 // tasks might be pushing objects to it concurrently.
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4265 assert(_cm->out_of_regions(),
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4266 "at this point we should be out of regions");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4267
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4268 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4269 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	4270 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4271
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4272 // Try to reduce the number of available SATB buffers so that
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4273 // remark has less work to do.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4274 drain_satb_buffers();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4275 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4276
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4277 // 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	4278 // local queue and global stack.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4279 drain_local_queue(false);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4280 drain_global_stack(false);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4281
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4282 // Attempt at work stealing from other task's queues.
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	4283 if (do_stealing && !has_aborted()) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4284 // 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	4285 // we could. Let's try to do some stealing...
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4286
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4287 // 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	4288 // tasks might be pushing objects to it concurrently.
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4289 assert(_cm->out_of_regions() && _task_queue->size() == 0,
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4290 "only way to reach here");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4291
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4292 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4293 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	4294 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4295
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4296 while (!has_aborted()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4297 oop obj;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4298 statsOnly( ++_steal_attempts );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4299
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4300 if (_cm->try_stealing(_worker_id, &_hash_seed, obj)) {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4301 if (_cm->verbose_medium()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4302 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	4303 _worker_id, (void*) obj);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4304 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4305
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4306 statsOnly( ++_steals );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4307
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4308 assert(_nextMarkBitMap->isMarked((HeapWord*) obj),
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4309 "any stolen object should be marked");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4310 scan_object(obj);
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 // 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	4313 // local queue and global stack.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4314 drain_local_queue(false);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4315 drain_global_stack(false);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4316 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4317 break;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4318 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4319 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4320 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4321
3316 cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	4322 // 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	4323 // 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	4324 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	4325 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	4326 _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	4327 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	4328 }
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	4329 }
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	4330
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4331 // 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	4332 // termination protocol.
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	4333 if (do_termination && !has_aborted()) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4334 // 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	4335 // tasks might be concurrently pushing objects on it.
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4336 // Separated the asserts so that we know which one fires.
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4337 assert(_cm->out_of_regions(), "only way to reach here");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4338 assert(_task_queue->size() == 0, "only way to reach here");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4339
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4340 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4341 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	4342 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4343
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4344 _termination_start_time_ms = os::elapsedVTime() * 1000.0;
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4345
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4346 // The CMTask class also extends the TerminatorTerminator class,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4347 // hence its should_exit_termination() method will also decide
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4348 // whether to exit the termination protocol or not.
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4349 bool finished = (is_serial \|\|
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4350 _cm->terminator()->offer_termination(this));
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4351 double termination_end_time_ms = os::elapsedVTime() * 1000.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4352 _termination_time_ms +=
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4353 termination_end_time_ms - _termination_start_time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4354
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4355 if (finished) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4356 // We're all done.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4357
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4358 if (_worker_id == 0) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4359 // let's allow task 0 to do this
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4360 if (concurrent()) {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4361 assert(_cm->concurrent_marking_in_progress(), "invariant");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4362 // we need to set this to false before the next
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4363 // safepoint. This way we ensure that the marking phase
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4364 // doesn't observe any more heap expansions.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4365 _cm->clear_concurrent_marking_in_progress();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4366 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4367 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4368
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4369 // 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	4370 // all other tasks have finished. We separated the guarantees so
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4371 // 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	4372 // which one.
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4373 guarantee(_cm->out_of_regions(), "only way to reach here");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4374 guarantee(_cm->mark_stack_empty(), "only way to reach here");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4375 guarantee(_task_queue->size() == 0, "only way to reach here");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4376 guarantee(!_cm->has_overflown(), "only way to reach here");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4377 guarantee(!_cm->mark_stack_overflow(), "only way to reach here");
342 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] all tasks terminated", _worker_id);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4381 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4382 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4383 // 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	4384 // 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	4385
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4386 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4387 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	4388 _worker_id);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4389 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4390
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4391 set_has_aborted();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4392 statsOnly( ++_aborted_termination );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4393 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4394 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4395
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4396 // 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	4397 // closure which was statically allocated in this frame doesn't
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4398 // escape it by accident.
3771 842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	4399 set_cm_oop_closure(NULL);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4400 double end_time_ms = os::elapsedVTime() * 1000.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4401 double elapsed_time_ms = end_time_ms - _start_time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4402 // Update the step history.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4403 _step_times_ms.add(elapsed_time_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4404
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4405 if (has_aborted()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4406 // The task was aborted for some reason.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4407
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4408 statsOnly( ++_aborted );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4409
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	4410 if (_has_timed_out) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4411 double diff_ms = elapsed_time_ms - _time_target_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4412 // Keep statistics of how well we did with respect to hitting
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4413 // 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	4414 // other reasons, then the results might get skewed).
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4415 _marking_step_diffs_ms.add(diff_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4416 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4417
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4418 if (_cm->has_overflown()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4419 // This is the interesting one. We aborted because a global
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4420 // overflow was raised. This means we have to restart the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4421 // marking phase and start iterating over regions. However, in
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4422 // 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	4423 // 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	4424 // will achieve this with the use of two barrier sync points.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4425
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4426 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4427 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	4428 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4429
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4430 if (!is_serial) {
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4431 // 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	4432 // from a parallel context
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4433 _cm->enter_first_sync_barrier(_worker_id);
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4434
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4435 // 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	4436 // stopped doing marking work. So, it's now safe to
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4437 // 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	4438 // task 0 will clear the global data structures.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4439 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4440
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4441 statsOnly( ++_aborted_overflow );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4442
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4443 // We clear the local state of this task...
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4444 clear_region_fields();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4445
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4446 if (!is_serial) {
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4447 // ...and enter the second barrier.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4448 _cm->enter_second_sync_barrier(_worker_id);
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4449 }
8788 e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	4450 // 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	4451 // marking, everything has been re-initialized and we're
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4452 // ready to restart.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4453 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4454
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4455 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4456 gclog_or_tty->print_cr("[%u] <<<<<<<<<< ABORTING, target = %1.2lfms, "
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4457 "elapsed = %1.2lfms <<<<<<<<<<",
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4458 _worker_id, _time_target_ms, elapsed_time_ms);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4459 if (_cm->has_aborted()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4460 gclog_or_tty->print_cr("[%u] ========== MARKING ABORTED ==========",
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4461 _worker_id);
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 } else {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4465 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4466 gclog_or_tty->print_cr("[%u] <<<<<<<<<< FINISHED, target = %1.2lfms, "
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4467 "elapsed = %1.2lfms <<<<<<<<<<",
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4468 _worker_id, _time_target_ms, elapsed_time_ms);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4469 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4470 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4471
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4472 _claimed = false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4473 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4474
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4475 CMTask::CMTask(uint worker_id,
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4476 ConcurrentMark* cm,
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	4477 size_t* marked_bytes,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	4478 BitMap* card_bm,
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4479 CMTaskQueue* task_queue,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4480 CMTaskQueueSet* task_queues)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4481 : _g1h(G1CollectedHeap::heap()),
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4482 _worker_id(worker_id), _cm(cm),
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4483 _claimed(false),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4484 _nextMarkBitMap(NULL), _hash_seed(17),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4485 _task_queue(task_queue),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4486 _task_queues(task_queues),
3771 842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	4487 _cm_oop_closure(NULL),
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	4488 _marked_bytes_array(marked_bytes),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	4489 _card_bm(card_bm) {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4490 guarantee(task_queue != NULL, "invariant");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4491 guarantee(task_queues != NULL, "invariant");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4492
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4493 statsOnly( _clock_due_to_scanning = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4494 _clock_due_to_marking = 0 );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4495
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4496 _marking_step_diffs_ms.add(0.5);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4497 }
2435 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 // 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	4500 // 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	4501 // 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	4502 // 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	4503 // 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	4504 // 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	4505
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4506 // 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	4507 // 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	4508 #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	4509
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4510 #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	4511 #ifdef _LP64
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_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	4513 #else // _LP64
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_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	4515 #endif // _LP64
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4516
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4517 // 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	4518 #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	4519 #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	4520 #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	4521 #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	4522 #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	4523 #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	4524
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4525 // 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	4526 #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	4527 #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	4528 #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	4529 #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	4530
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4531 G1PrintRegionLivenessInfoClosure::
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4532 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	4533 : _out(out),
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4534 _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	4535 _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	4536 _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	4537 _hum_prev_live_bytes(0), _hum_next_live_bytes(0),
12080 5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4538 _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	4539 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	4540 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	4541 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	4542 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	4543
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4544 // 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	4545 _out->cr();
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4546 _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	4547 _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	4548 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	4549 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	4550 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	4551 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	4552 g1_reserved.start(), g1_reserved.end(),
3986 65a8ff39a6da 7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t johnc parents: 3979 diff changeset	4553 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	4554 _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	4555 _out->print_cr(G1PPRL_LINE_PREFIX
10290 05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4556 G1PPRL_TYPE_H_FORMAT
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4557 G1PPRL_ADDR_BASE_H_FORMAT
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4558 G1PPRL_BYTE_H_FORMAT
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4559 G1PPRL_BYTE_H_FORMAT
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4560 G1PPRL_BYTE_H_FORMAT
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4561 G1PPRL_DOUBLE_H_FORMAT
12080 5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4562 G1PPRL_BYTE_H_FORMAT
10290 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 "type", "address-range",
12080 5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4565 "used", "prev-live", "next-live", "gc-eff",
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4566 "remset", "code-roots");
3977 5cc33133bc6d 7092245: G1: Wrong format specifier in G1PrintRegionLivenessInfo header output johnc parents: 3975 diff changeset	4567 _out->print_cr(G1PPRL_LINE_PREFIX
10290 05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4568 G1PPRL_TYPE_H_FORMAT
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4569 G1PPRL_ADDR_BASE_H_FORMAT
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4570 G1PPRL_BYTE_H_FORMAT
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4571 G1PPRL_BYTE_H_FORMAT
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4572 G1PPRL_BYTE_H_FORMAT
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4573 G1PPRL_DOUBLE_H_FORMAT
12080 5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4574 G1PPRL_BYTE_H_FORMAT
10290 05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4575 G1PPRL_BYTE_H_FORMAT,
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4576 "", "",
12080 5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4577 "(bytes)", "(bytes)", "(bytes)", "(bytes/ms)",
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4578 "(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	4579 }
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4580
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4581 // 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	4582 // 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	4583 // 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	4584 // 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	4585 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	4586 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	4587 // 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	4588 // 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	4589 if (*hum_bytes > 0) {
3986 65a8ff39a6da 7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t johnc parents: 3979 diff changeset	4590 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	4591 *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	4592 }
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4593 return bytes;
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4594 }
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4595
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4596 // 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	4597 // 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	4598 // 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	4599 // 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	4600 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	4601 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	4602 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	4603 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	4604 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	4605 *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	4606 *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	4607 *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	4608 *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	4609 }
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4610
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4611 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	4612 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	4613 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	4614 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	4615 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	4616 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	4617 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	4618 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	4619 double gc_eff = r->gc_efficiency();
10290 05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4620 size_t remset_bytes = r->rem_set()->mem_size();
12080 5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4621 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	4622
2435 371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4623 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	4624 type = "FREE";
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4625 } 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	4626 type = "SURV";
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4627 } 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	4628 type = "EDEN";
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4629 } 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	4630 type = "HUMS";
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4631
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4632 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	4633 _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	4634 "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	4635 // 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	4636 _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	4637 _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	4638 _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	4639 _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	4640 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	4641 &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	4642 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	4643 } 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	4644 type = "HUMC";
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4645 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	4646 &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	4647 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	4648 } else {
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4649 type = "OLD";
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4650 }
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 _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	4653 _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	4654 _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	4655 _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	4656 _total_remset_bytes += remset_bytes;
12080 5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4657 _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	4658
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4659 // 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	4660 _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	4661 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	4662 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	4663 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	4664 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	4665 G1PPRL_BYTE_FORMAT
10290 05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4666 G1PPRL_DOUBLE_FORMAT
12080 5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4667 G1PPRL_BYTE_FORMAT
10290 05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4668 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	4669 type, bottom, end,
12080 5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4670 used_bytes, prev_live_bytes, next_live_bytes, gc_eff,
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4671 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	4672
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4673 return false;
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4674 }
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4675
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4676 G1PrintRegionLivenessInfoClosure::~G1PrintRegionLivenessInfoClosure() {
10290 05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4677 // 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	4678 _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	4679 // 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	4680 _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	4681 _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	4682 " SUMMARY"
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4683 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	4684 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	4685 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	4686 G1PPRL_SUM_MB_PERC_FORMAT("next-live")
12080 5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4687 G1PPRL_SUM_MB_FORMAT("remset")
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4688 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	4689 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	4690 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	4691 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	4692 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	4693 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	4694 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	4695 perc(_total_next_live_bytes, _total_capacity_bytes),
12080 5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4696 bytes_to_mb(_total_remset_bytes),
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4697 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	4698 _out->cr();
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4699 }

Mercurial > hg > graal-compiler

annotate src/share/vm/gc_implementation/g1/concurrentMark.cpp @ 17833:bfdf528be8e8