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

annotate src/share/vm/gc_implementation/g1/concurrentMark.cpp @ 20292:5d7a63aee595

8049051: Use of during_initial_mark_pause() in G1CollectorPolicy::record_collection_pause_end() prevents use of seperate object copy time prediction during marking Summary: Replaced use of during_initial_mark_pause() with the variable last_pause_included_initial_mark that holds the real old value of _during_initial_mark_pause. Reviewed-by: brutisso, ehelin

author	tschatzl
date	Mon, 21 Jul 2014 09:59:37 +0200
parents	e0954897238a
children	7df07d855c8e

rev	line source
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1 /*
17937 78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang drchase parents: 17844 diff changeset	2 * Copyright (c) 2001, 2014, 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"
20278 2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	27 #include "code/codeCache.hpp"
3771 842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	28 #include "gc_implementation/g1/concurrentMark.inline.hpp"
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1885 diff changeset	29 #include "gc_implementation/g1/concurrentMarkThread.inline.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1885 diff changeset	30 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1885 diff changeset	31 #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	32 #include "gc_implementation/g1/g1ErgoVerbose.hpp"
6007 5c86f8211d1e 7160728: Introduce an extra logging level for G1 logging brutisso parents: 5988 diff changeset	33 #include "gc_implementation/g1/g1Log.hpp"
3771 842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	34 #include "gc_implementation/g1/g1OopClosures.inline.hpp"
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1885 diff changeset	35 #include "gc_implementation/g1/g1RemSet.hpp"
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	36 #include "gc_implementation/g1/heapRegion.inline.hpp"
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1885 diff changeset	37 #include "gc_implementation/g1/heapRegionRemSet.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1885 diff changeset	38 #include "gc_implementation/g1/heapRegionSeq.inline.hpp"
2125 7246a374a9f2 6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent kamg parents: 2037 diff changeset	39 #include "gc_implementation/shared/vmGCOperations.hpp"
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	40 #include "gc_implementation/shared/gcTimer.hpp"
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	41 #include "gc_implementation/shared/gcTrace.hpp"
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	42 #include "gc_implementation/shared/gcTraceTime.hpp"
20278 2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	43 #include "memory/allocation.hpp"
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1885 diff changeset	44 #include "memory/genOopClosures.inline.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1885 diff changeset	45 #include "memory/referencePolicy.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1885 diff changeset	46 #include "memory/resourceArea.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1885 diff changeset	47 #include "oops/oop.inline.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1885 diff changeset	48 #include "runtime/handles.inline.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1885 diff changeset	49 #include "runtime/java.hpp"
20198 c49dcaf78a65 8042737: Introduce umbrella header prefetch.inline.hpp goetz parents: 20192 diff changeset	50 #include "runtime/prefetch.inline.hpp"
6197 d2a62e0f25eb 6995781: Native Memory Tracking (Phase 1) zgu parents: 6027 diff changeset	51 #include "services/memTracker.hpp"
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	52
4828 851b58c26def 7130334: G1: Change comments and error messages that refer to CMS in g1/concurrentMark.cpp/hpp brutisso parents: 4827 diff changeset	53 // Concurrent marking bit map wrapper
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	54
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	55 CMBitMapRO::CMBitMapRO(int shifter) :
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	56 _bm(),
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	57 _shifter(shifter) {
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	58 _bmStartWord = 0;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	59 _bmWordSize = 0;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	60 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	61
20278 2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	62 HeapWord* CMBitMapRO::getNextMarkedWordAddress(const HeapWord* addr,
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	63 const HeapWord* limit) const {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	64 // First we must round addr up to a possible object boundary.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	65 addr = (HeapWord*)align_size_up((intptr_t)addr,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	66 HeapWordSize << _shifter);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	67 size_t addrOffset = heapWordToOffset(addr);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	68 if (limit == NULL) {
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	69 limit = _bmStartWord + _bmWordSize;
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	70 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	71 size_t limitOffset = heapWordToOffset(limit);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	72 size_t nextOffset = _bm.get_next_one_offset(addrOffset, limitOffset);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	73 HeapWord* nextAddr = offsetToHeapWord(nextOffset);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	74 assert(nextAddr >= addr, "get_next_one postcondition");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	75 assert(nextAddr == limit \|\| isMarked(nextAddr),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	76 "get_next_one postcondition");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	77 return nextAddr;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	78 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	79
20278 2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	80 HeapWord* CMBitMapRO::getNextUnmarkedWordAddress(const HeapWord* addr,
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	81 const HeapWord* limit) const {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	82 size_t addrOffset = heapWordToOffset(addr);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	83 if (limit == NULL) {
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	84 limit = _bmStartWord + _bmWordSize;
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	85 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	86 size_t limitOffset = heapWordToOffset(limit);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	87 size_t nextOffset = _bm.get_next_zero_offset(addrOffset, limitOffset);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	88 HeapWord* nextAddr = offsetToHeapWord(nextOffset);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	89 assert(nextAddr >= addr, "get_next_one postcondition");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	90 assert(nextAddr == limit \|\| !isMarked(nextAddr),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	91 "get_next_one postcondition");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	92 return nextAddr;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	93 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	94
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	95 int CMBitMapRO::heapWordDiffToOffsetDiff(size_t diff) const {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	96 assert((diff & ((1 << _shifter) - 1)) == 0, "argument check");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	97 return (int) (diff >> _shifter);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	98 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	99
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	100 #ifndef PRODUCT
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	101 bool CMBitMapRO::covers(ReservedSpace heap_rs) const {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	102 // 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	103 assert(((size_t)_bm.size() * ((size_t)1 << _shifter)) == _bmWordSize,
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	104 "size inconsistency");
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	105 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	106 _bmWordSize == heap_rs.size()>>LogHeapWordSize;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	107 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	108 #endif
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	109
9076 7b835924c31c 8011872: Include Bit Map addresses in the hs_err files stefank parents: 8789 diff changeset	110 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	111 _bm.print_on_error(st, prefix);
7b835924c31c 8011872: Include Bit Map addresses in the hs_err files stefank parents: 8789 diff changeset	112 }
7b835924c31c 8011872: Include Bit Map addresses in the hs_err files stefank parents: 8789 diff changeset	113
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	114 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	115 _bmStartWord = (HeapWord*)(heap_rs.base());
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	116 _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	117 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	118 (_bmWordSize >> (_shifter + LogBitsPerByte)) + 1));
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	119 if (!brs.is_reserved()) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	120 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	121 return false;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	122 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	123 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	124 // 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	125 // 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	126 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	127 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	128 return false;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	129 }
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() == brs.size(),
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	131 "didn't reserve backing store for all of concurrent marking bit map?");
20221 ab5fbf410512 8043722: Swapped usage of idx_t and bm_word_t types in parMarkBitMap.cpp tschatzl parents: 20198 diff changeset	132 _bm.set_map((BitMap::bm_word_t*)_virtual_space.low());
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	133 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	134 _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	135 _bm.set_size(_bmWordSize >> _shifter);
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	136 return true;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	137 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	138
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	139 void CMBitMap::clearAll() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	140 _bm.clear();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	141 return;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	142 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	143
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	144 void CMBitMap::markRange(MemRegion mr) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	145 mr.intersection(MemRegion(_bmStartWord, _bmWordSize));
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	146 assert(!mr.is_empty(), "unexpected empty region");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	147 assert((offsetToHeapWord(heapWordToOffset(mr.end())) ==
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	148 ((HeapWord *) mr.end())),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	149 "markRange memory region end is not card aligned");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	150 // convert address range into offset range
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	151 _bm.at_put_range(heapWordToOffset(mr.start()),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	152 heapWordToOffset(mr.end()), true);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	153 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	154
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	155 void CMBitMap::clearRange(MemRegion mr) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	156 mr.intersection(MemRegion(_bmStartWord, _bmWordSize));
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	157 assert(!mr.is_empty(), "unexpected empty region");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	158 // convert address range into offset range
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	159 _bm.at_put_range(heapWordToOffset(mr.start()),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	160 heapWordToOffset(mr.end()), false);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	161 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	162
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	163 MemRegion CMBitMap::getAndClearMarkedRegion(HeapWord* addr,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	164 HeapWord* end_addr) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	165 HeapWord* start = getNextMarkedWordAddress(addr);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	166 start = MIN2(start, end_addr);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	167 HeapWord* end = getNextUnmarkedWordAddress(start);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	168 end = MIN2(end, end_addr);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	169 assert(start <= end, "Consistency check");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	170 MemRegion mr(start, end);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	171 if (!mr.is_empty()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	172 clearRange(mr);
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 return mr;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	175 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	176
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	177 CMMarkStack::CMMarkStack(ConcurrentMark* cm) :
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	178 _base(NULL), _cm(cm)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	179 #ifdef ASSERT
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	180 , _drain_in_progress(false)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	181 , _drain_in_progress_yields(false)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	182 #endif
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	183 {}
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	184
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	185 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	186 // 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	187 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	188 if (!rs.is_reserved()) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	189 warning("ConcurrentMark MarkStack allocation failure");
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	190 return false;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	191 }
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	192 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	193 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	194 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	195 // 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	196 rs.release();
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	197 return false;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	198 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	199 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	200 "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	201 _base = (oop*) _virtual_space.low();
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	202 setEmpty();
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	203 _capacity = (jint) capacity;
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	204 _saved_index = -1;
7450 d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	205 _should_expand = false;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	206 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	207 return true;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	208 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	209
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	210 void CMMarkStack::expand() {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	211 // 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	212 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	213 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	214 // Clear expansion flag
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	215 _should_expand = false;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	216 if (_capacity == (jint) MarkStackSizeMax) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	217 if (PrintGCDetails && Verbose) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	218 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	219 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	220 return;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	221 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	222 // Double capacity if possible
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	223 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	224 // 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	225 // 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	226 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	227 sizeof(oop)));
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	228 if (rs.is_reserved()) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	229 // 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	230 _virtual_space.release();
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	231 // 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	232 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	233 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	234 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	235 _base = (oop*)(_virtual_space.low());
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	236 _index = 0;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	237 _capacity = new_capacity;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	238 } else {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	239 if (PrintGCDetails && Verbose) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	240 // Failed to double capacity, continue;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	241 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	242 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	243 _capacity / K, new_capacity / K);
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 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	246 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	247
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	248 void CMMarkStack::set_should_expand() {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	249 // 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	250 // 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	251 // possible, expand the stack.
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	252 _should_expand = _cm->has_overflown();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	253 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	254
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	255 CMMarkStack::~CMMarkStack() {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	256 if (_base != NULL) {
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	257 _base = NULL;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	258 _virtual_space.release();
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	259 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	260 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	261
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	262 void CMMarkStack::par_push(oop ptr) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	263 while (true) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	264 if (isFull()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	265 _overflow = true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	266 return;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	267 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	268 // Otherwise...
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	269 jint index = _index;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	270 jint next_index = index+1;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	271 jint res = Atomic::cmpxchg(next_index, &_index, index);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	272 if (res == index) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	273 _base[index] = ptr;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	274 // 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	275 // doesn't seem necessary.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	276 NOT_PRODUCT(_max_depth = MAX2(_max_depth, next_index));
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	277 return;
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 // Otherwise, we need to try again.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	280 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	281 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	282
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	283 void CMMarkStack::par_adjoin_arr(oop* ptr_arr, int n) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	284 while (true) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	285 if (isFull()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	286 _overflow = true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	287 return;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	288 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	289 // Otherwise...
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	290 jint index = _index;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	291 jint next_index = index + n;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	292 if (next_index > _capacity) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	293 _overflow = true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	294 return;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	295 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	296 jint res = Atomic::cmpxchg(next_index, &_index, index);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	297 if (res == index) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	298 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	299 int ind = index + i;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	300 assert(ind < _capacity, "By overflow test above.");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	301 _base[ind] = ptr_arr[i];
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 NOT_PRODUCT(_max_depth = MAX2(_max_depth, next_index));
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	304 return;
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 // Otherwise, we need to try again.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	307 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	308 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	309
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	310 void CMMarkStack::par_push_arr(oop* ptr_arr, int n) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	311 MutexLockerEx x(ParGCRareEvent_lock, Mutex::_no_safepoint_check_flag);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	312 jint start = _index;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	313 jint next_index = start + n;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	314 if (next_index > _capacity) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	315 _overflow = true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	316 return;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	317 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	318 // Otherwise.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	319 _index = next_index;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	320 for (int i = 0; i < n; i++) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	321 int ind = start + i;
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	322 assert(ind < _capacity, "By overflow test above.");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	323 _base[ind] = ptr_arr[i];
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	324 }
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	325 NOT_PRODUCT(_max_depth = MAX2(_max_depth, next_index));
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	326 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	327
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	328 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	329 MutexLockerEx x(ParGCRareEvent_lock, Mutex::_no_safepoint_check_flag);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	330 jint index = _index;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	331 if (index == 0) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	332 *n = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	333 return false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	334 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	335 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	336 jint new_ind = index - k;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	337 for (int j = 0; j < k; j++) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	338 ptr_arr[j] = _base[new_ind + j];
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	339 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	340 _index = new_ind;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	341 *n = k;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	342 return true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	343 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	344 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	345
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	346 template<class OopClosureClass>
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	347 bool CMMarkStack::drain(OopClosureClass* cl, CMBitMap* bm, bool yield_after) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	348 assert(!_drain_in_progress \|\| !_drain_in_progress_yields \|\| yield_after
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	349 \|\| SafepointSynchronize::is_at_safepoint(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	350 "Drain recursion must be yield-safe.");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	351 bool res = true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	352 debug_only(_drain_in_progress = true);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	353 debug_only(_drain_in_progress_yields = yield_after);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	354 while (!isEmpty()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	355 oop newOop = pop();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	356 assert(G1CollectedHeap::heap()->is_in_reserved(newOop), "Bad pop");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	357 assert(newOop->is_oop(), "Expected an oop");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	358 assert(bm == NULL \|\| bm->isMarked((HeapWord*)newOop),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	359 "only grey objects on this stack");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	360 newOop->oop_iterate(cl);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	361 if (yield_after && _cm->do_yield_check()) {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	362 res = false;
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	363 break;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	364 }
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 debug_only(_drain_in_progress = false);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	367 return res;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	368 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	369
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	370 void CMMarkStack::note_start_of_gc() {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	371 assert(_saved_index == -1,
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	372 "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	373 _saved_index = _index;
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	374 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	375
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	376 void CMMarkStack::note_end_of_gc() {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	377 // 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	378 // 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	379 // 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	380 // 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	381 // issue in any way.
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	382 guarantee(_saved_index == _index,
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	383 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	384 _saved_index = -1;
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	385 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	386
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	387 void CMMarkStack::oops_do(OopClosure* f) {
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	388 assert(_saved_index == _index,
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	389 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	390 for (int i = 0; i < _index; i += 1) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	391 f->do_oop(&_base[i]);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	392 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	393 }
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 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	396 return _g1h->is_obj_ill(obj);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	397 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	398
4837 eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	399 CMRootRegions::CMRootRegions() :
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	400 _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	401 _should_abort(false), _next_survivor(NULL) { }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	402
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	403 void CMRootRegions::init(G1CollectedHeap* g1h, ConcurrentMark* cm) {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	404 _young_list = g1h->young_list();
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	405 _cm = cm;
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	406 }
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 void CMRootRegions::prepare_for_scan() {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	409 assert(!scan_in_progress(), "pre-condition");
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	410
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	411 // Currently, only survivors can be root regions.
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	412 assert(_next_survivor == NULL, "pre-condition");
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	413 _next_survivor = _young_list->first_survivor_region();
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	414 _scan_in_progress = (_next_survivor != NULL);
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	415 _should_abort = false;
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	416 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	417
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	418 HeapRegion* CMRootRegions::claim_next() {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	419 if (_should_abort) {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	420 // 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	421 // 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	422 return NULL;
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	423 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	424
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	425 // Currently, only survivors can be root regions.
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	426 HeapRegion* res = _next_survivor;
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	427 if (res != NULL) {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	428 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	429 // 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	430 res = _next_survivor;
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	431 if (res != NULL) {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	432 if (res == _young_list->last_survivor_region()) {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	433 // 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	434 // that we're done.
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	435 _next_survivor = NULL;
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 _next_survivor = res->get_next_young_region();
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	438 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	439 } else {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	440 // 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	441 // 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	442 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	443 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	444 assert(res == NULL \|\| res->is_survivor(), "post-condition");
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 return res;
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	447 }
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 void CMRootRegions::scan_finished() {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	450 assert(scan_in_progress(), "pre-condition");
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	451
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	452 // Currently, only survivors can be root regions.
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	453 if (!_should_abort) {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	454 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	455 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	456 _next_survivor = NULL;
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	457
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	458 {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	459 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	460 _scan_in_progress = false;
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	461 RootRegionScan_lock->notify_all();
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	462 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	463 }
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 bool CMRootRegions::wait_until_scan_finished() {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	466 if (!scan_in_progress()) return false;
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	467
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	468 {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	469 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	470 while (scan_in_progress()) {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	471 RootRegionScan_lock->wait(Mutex::_no_safepoint_check_flag);
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 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	474 return true;
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	475 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	476
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	477 #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	478 #pragma warning( disable:4355 ) // 'this' : used in base member initializer list
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	479 #endif // _MSC_VER
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	480
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	481 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	482 return MAX2((n_par_threads + 2) / 4, 1U);
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	483 }
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	484
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	485 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	486 _g1h(g1h),
12229 ff218fdb30ba 8021823: G1: Concurrent marking crashes with -XX:ObjectAlignmentInBytes>=32 in 64bit VMs tschatzl parents: 12080 diff changeset	487 _markBitMap1(log2_intptr(MinObjAlignment)),
ff218fdb30ba 8021823: G1: Concurrent marking crashes with -XX:ObjectAlignmentInBytes>=32 in 64bit VMs tschatzl parents: 12080 diff changeset	488 _markBitMap2(log2_intptr(MinObjAlignment)),
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	489 _parallel_marking_threads(0),
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	490 _max_parallel_marking_threads(0),
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	491 _sleep_factor(0.0),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	492 _marking_task_overhead(1.0),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	493 _cleanup_sleep_factor(0.0),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	494 _cleanup_task_overhead(1.0),
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	495 _cleanup_list("Cleanup List"),
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	496 _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	497 _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	498 CardTableModRefBS::card_shift,
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	499 false /* in_resource_area*/),
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	500
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	501 _prevMarkBitMap(&_markBitMap1),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	502 _nextMarkBitMap(&_markBitMap2),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	503
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	504 _markStack(this),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	505 // _finger set in set_non_marking_state
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	506
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	507 _max_worker_id(MAX2((uint)ParallelGCThreads, 1U)),
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	508 // _active_tasks set in set_non_marking_state
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	509 // _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	510 _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	511 _terminator(ParallelTaskTerminator((int) _max_worker_id, _task_queues)),
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	512
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	513 _has_overflown(false),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	514 _concurrent(false),
619 7ea5ca260b28 6814467: G1: small fixes related to concurrent marking verboseness tonyp parents: 470 diff changeset	515 _has_aborted(false),
20190 0982ec23da03 8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps brutisso parents: 17950 diff changeset	516 _aborted_gc_id(GCId::undefined()),
619 7ea5ca260b28 6814467: G1: small fixes related to concurrent marking verboseness tonyp parents: 470 diff changeset	517 _restart_for_overflow(false),
7ea5ca260b28 6814467: G1: small fixes related to concurrent marking verboseness tonyp parents: 470 diff changeset	518 _concurrent_marking_in_progress(false),
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	519
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	520 // _verbose_level set below
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	521
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	522 _init_times(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	523 _remark_times(), _remark_mark_times(), _remark_weak_ref_times(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	524 _cleanup_times(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	525 _total_counting_time(0.0),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	526 _total_rs_scrub_time(0.0),
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	527
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	528 _parallel_workers(NULL),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	529
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	530 _count_card_bitmaps(NULL),
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	531 _count_marked_bytes(NULL),
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	532 _completed_initialization(false) {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	533 CMVerboseLevel verbose_level = (CMVerboseLevel) G1MarkingVerboseLevel;
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	534 if (verbose_level < no_verbose) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	535 verbose_level = no_verbose;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	536 }
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	537 if (verbose_level > high_verbose) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	538 verbose_level = high_verbose;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	539 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	540 _verbose_level = verbose_level;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	541
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	542 if (verbose_low()) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	543 gclog_or_tty->print_cr("[global] init, heap start = "PTR_FORMAT", "
17937 78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang drchase parents: 17844 diff changeset	544 "heap end = " INTPTR_FORMAT, p2i(_heap_start), p2i(_heap_end));
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	545 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	546
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	547 if (!_markBitMap1.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 first 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 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	551 if (!_markBitMap2.allocate(heap_rs)) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	552 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	553 return;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	554 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	555
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	556 // Create & start a ConcurrentMark thread.
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	557 _cmThread = new ConcurrentMarkThread(this);
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	558 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	559 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	560 if (_cmThread->osthread() == NULL) {
1de8e5356754 8029326: G1 does not check if threads gets created ehelin parents: 12316 diff changeset	561 vm_shutdown_during_initialization("Could not create ConcurrentMarkThread");
1de8e5356754 8029326: G1 does not check if threads gets created ehelin parents: 12316 diff changeset	562 }
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	563
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	564 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	565 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	566 assert(_markBitMap2.covers(heap_rs), "_markBitMap2 inconsistency");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	567
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	568 SATBMarkQueueSet& satb_qs = JavaThread::satb_mark_queue_set();
1282 b81f3572f355 6928059: G1: command line parameter renaming tonyp parents: 1111 diff changeset	569 satb_qs.set_buffer_size(G1SATBBufferSize);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	570
4837 eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	571 _root_regions.init(_g1h, this);
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	572
1284 5f1f51edaff6 6928081: G1: rename parameters common with CMS jmasa parents: 1282 diff changeset	573 if (ConcGCThreads > ParallelGCThreads) {
17937 78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang drchase parents: 17844 diff changeset	574 warning("Can't have more ConcGCThreads (" UINTX_FORMAT ") "
78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang drchase parents: 17844 diff changeset	575 "than ParallelGCThreads (" UINTX_FORMAT ").",
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	576 ConcGCThreads, ParallelGCThreads);
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	577 return;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	578 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	579 if (ParallelGCThreads == 0) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	580 // 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	581 // spawn any marking threads either
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	582 _parallel_marking_threads = 0;
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	583 _max_parallel_marking_threads = 0;
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	584 _sleep_factor = 0.0;
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	585 _marking_task_overhead = 1.0;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	586 } else {
8006 4700e77d44c1 8006894: G1: Number of marking threads missing from PrintFlagsFinal output johnc parents: 7450 diff changeset	587 if (!FLAG_IS_DEFAULT(ConcGCThreads) && ConcGCThreads > 0) {
4700e77d44c1 8006894: G1: Number of marking threads missing from PrintFlagsFinal output johnc parents: 7450 diff changeset	588 // Note: ConcGCThreads has precedence over G1MarkingOverheadPercent
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	589 // if both are set
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	590 _sleep_factor = 0.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	591 _marking_task_overhead = 1.0;
751 20c6f43950b5 6490395: G1: Tidy up command line flags. johnc parents: 647 diff changeset	592 } else if (G1MarkingOverheadPercent > 0) {
8006 4700e77d44c1 8006894: G1: Number of marking threads missing from PrintFlagsFinal output johnc parents: 7450 diff changeset	593 // 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	594 // 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	595 double marking_overhead = (double) G1MarkingOverheadPercent / 100.0;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	596 double overall_cm_overhead =
751 20c6f43950b5 6490395: G1: Tidy up command line flags. johnc parents: 647 diff changeset	597 (double) MaxGCPauseMillis * marking_overhead /
20c6f43950b5 6490395: G1: Tidy up command line flags. johnc parents: 647 diff changeset	598 (double) GCPauseIntervalMillis;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	599 double cpu_ratio = 1.0 / (double) os::processor_count();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	600 double marking_thread_num = ceil(overall_cm_overhead / cpu_ratio);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	601 double marking_task_overhead =
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	602 overall_cm_overhead / marking_thread_num *
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	603 (double) os::processor_count();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	604 double sleep_factor =
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	605 (1.0 - marking_task_overhead) / marking_task_overhead;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	606
8006 4700e77d44c1 8006894: G1: Number of marking threads missing from PrintFlagsFinal output johnc parents: 7450 diff changeset	607 FLAG_SET_ERGO(uintx, ConcGCThreads, (uint) marking_thread_num);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	608 _sleep_factor = sleep_factor;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	609 _marking_task_overhead = marking_task_overhead;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	610 } else {
8006 4700e77d44c1 8006894: G1: Number of marking threads missing from PrintFlagsFinal output johnc parents: 7450 diff changeset	611 // 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	612 // the number of parallel GC threads.
4700e77d44c1 8006894: G1: Number of marking threads missing from PrintFlagsFinal output johnc parents: 7450 diff changeset	613 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	614 FLAG_SET_ERGO(uintx, ConcGCThreads, marking_thread_num);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	615 _sleep_factor = 0.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	616 _marking_task_overhead = 1.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	617 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	618
8006 4700e77d44c1 8006894: G1: Number of marking threads missing from PrintFlagsFinal output johnc parents: 7450 diff changeset	619 assert(ConcGCThreads > 0, "Should have been set");
4700e77d44c1 8006894: G1: Number of marking threads missing from PrintFlagsFinal output johnc parents: 7450 diff changeset	620 _parallel_marking_threads = (uint) ConcGCThreads;
4700e77d44c1 8006894: G1: Number of marking threads missing from PrintFlagsFinal output johnc parents: 7450 diff changeset	621 _max_parallel_marking_threads = _parallel_marking_threads;
4700e77d44c1 8006894: G1: Number of marking threads missing from PrintFlagsFinal output johnc parents: 7450 diff changeset	622
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	623 if (parallel_marking_threads() > 1) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	624 _cleanup_task_overhead = 1.0;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	625 } else {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	626 _cleanup_task_overhead = marking_task_overhead();
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	627 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	628 _cleanup_sleep_factor =
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	629 (1.0 - cleanup_task_overhead()) / cleanup_task_overhead();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	630
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	631 #if 0
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	632 gclog_or_tty->print_cr("Marking Threads %d", parallel_marking_threads());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	633 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	634 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	635 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	636 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	637 #endif
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	638
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	639 guarantee(parallel_marking_threads() > 0, "peace of mind");
1833 8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1719 diff changeset	640 _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	641 _max_parallel_marking_threads, false, true);
1833 8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1719 diff changeset	642 if (_parallel_workers == NULL) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	643 vm_exit_during_initialization("Failed necessary allocation.");
1833 8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1719 diff changeset	644 } else {
8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1719 diff changeset	645 _parallel_workers->initialize_workers();
8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1719 diff changeset	646 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	647 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	648
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	649 if (FLAG_IS_DEFAULT(MarkStackSize)) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	650 uintx mark_stack_size =
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	651 MIN2(MarkStackSizeMax,
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	652 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	653 // 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	654 // 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	655 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	656 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	657 "must be between " UINTX_FORMAT " and " UINTX_FORMAT,
17937 78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang drchase parents: 17844 diff changeset	658 mark_stack_size, (uintx) 1, MarkStackSizeMax);
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	659 return;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	660 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	661 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	662 } else {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	663 // Verify MarkStackSize is in range.
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	664 if (FLAG_IS_CMDLINE(MarkStackSize)) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	665 if (FLAG_IS_DEFAULT(MarkStackSizeMax)) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	666 if (!(MarkStackSize >= 1 && MarkStackSize <= MarkStackSizeMax)) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	667 warning("Invalid value specified for MarkStackSize (" UINTX_FORMAT "): "
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	668 "must be between " UINTX_FORMAT " and " UINTX_FORMAT,
17937 78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang drchase parents: 17844 diff changeset	669 MarkStackSize, (uintx) 1, MarkStackSizeMax);
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	670 return;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	671 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	672 } 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	673 if (!(MarkStackSize >= 1 && MarkStackSize <= MarkStackSizeMax)) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	674 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	675 " or for MarkStackSizeMax (" UINTX_FORMAT ")",
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	676 MarkStackSize, MarkStackSizeMax);
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	677 return;
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 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	680 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	681 }
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 if (!_markStack.allocate(MarkStackSize)) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	684 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	685 return;
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
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	688 _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	689 _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	690
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	691 _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	692 _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	693
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	694 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	695
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	696 // 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	697 _active_tasks = _max_worker_id;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	698
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	699 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	700 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	701 CMTaskQueue* task_queue = new CMTaskQueue();
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	702 task_queue->initialize();
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	703 _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	704
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	705 _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	706 _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	707
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	708 _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	709 _count_marked_bytes[i],
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	710 &_count_card_bitmaps[i],
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	711 task_queue, _task_queues);
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	712
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	713 _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	714 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	715
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	716 // 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	717 // 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	718 _heap_bottom_card_num =
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	719 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	720 CardTableModRefBS::card_shift);
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	721
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	722 // 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	723 clear_all_count_data();
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	724
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	725 // 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	726 _heap_start = (HeapWord*) heap_rs.base();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	727 set_non_marking_state();
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	728 _completed_initialization = true;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	729 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	730
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	731 void ConcurrentMark::update_g1_committed(bool force) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	732 // 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	733 // update _heap_end.
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	734 if (!concurrent_marking_in_progress() && !force) return;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	735
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	736 MemRegion committed = _g1h->g1_committed();
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	737 assert(committed.start() == _heap_start, "start shouldn't change");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	738 HeapWord* new_end = committed.end();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	739 if (new_end > _heap_end) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	740 // The heap has been expanded.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	741
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	742 _heap_end = new_end;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	743 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	744 // Notice that the heap can also shrink. However, this only happens
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	745 // during a Full GC (at least currently) and the entire marking
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	746 // 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	747 // do nothing.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	748 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	749
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	750 void ConcurrentMark::reset() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	751 // 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	752 // phase. CM will be notified of any future g1_committed expansions
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	753 // will be at the end of evacuation pauses, when tasks are
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	754 // inactive.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	755 MemRegion committed = _g1h->g1_committed();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	756 _heap_start = committed.start();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	757 _heap_end = committed.end();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	758
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	759 // Separated the asserts so that we know which one fires.
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	760 assert(_heap_start != NULL, "heap bounds should look ok");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	761 assert(_heap_end != NULL, "heap bounds should look ok");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	762 assert(_heap_start < _heap_end, "heap bounds should look ok");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	763
7450 d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	764 // Reset all the marking data structures and any necessary flags
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	765 reset_marking_state();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	766
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	767 if (verbose_low()) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	768 gclog_or_tty->print_cr("[global] resetting");
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	769 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	770
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	771 // We do reset all of them, since different phases will use
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	772 // 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	773 // of them ready.
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	774 for (uint i = 0; i < _max_worker_id; ++i) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	775 _tasks[i]->reset(_nextMarkBitMap);
1835 4805b9f4779e 6941395: G1: Use only lock-free versions of region stack push() and pop() johnc parents: 1833 diff changeset	776 }
342 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 // 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	779 // pause with initial mark piggy-backed
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	780 set_concurrent_marking_in_progress();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	781 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	782
7450 d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	783
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	784 void ConcurrentMark::reset_marking_state(bool clear_overflow) {
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	785 _markStack.set_should_expand();
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	786 _markStack.setEmpty(); // Also clears the _markStack overflow flag
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	787 if (clear_overflow) {
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	788 clear_has_overflown();
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	789 } else {
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	790 assert(has_overflown(), "pre-condition");
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	791 }
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	792 _finger = _heap_start;
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 for (uint i = 0; i < _max_worker_id; ++i) {
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	795 CMTaskQueue* queue = _task_queues->queue(i);
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	796 queue->set_empty();
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	797 }
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	798 }
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	799
8788 e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	800 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	801 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	802
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	803 _active_tasks = active_tasks;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	804 // Need to update the three data structures below according to the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	805 // number of active threads for this phase.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	806 _terminator = ParallelTaskTerminator((int) active_tasks, _task_queues);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	807 _first_overflow_barrier_sync.set_n_workers((int) active_tasks);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	808 _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	809 }
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	810
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	811 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	812 set_concurrency(active_tasks);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	813
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	814 _concurrent = concurrent;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	815 // 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	816 for (uint i = 0; i < _max_worker_id; ++i)
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	817 _tasks[i]->set_concurrent(concurrent);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	818
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	819 if (concurrent) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	820 set_concurrent_marking_in_progress();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	821 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	822 // We currently assume that the concurrent flag has been set to
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	823 // 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	824 // in a STW phase.
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	825 assert(!concurrent_marking_in_progress(), "invariant");
17950 8a140676873f 8040804: G1: Concurrent mark stuck in loop calling os::elapsedVTime() pliden parents: 17949 diff changeset	826 assert(out_of_regions(),
8788 e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	827 err_msg("only way to get here: _finger: "PTR_FORMAT", _heap_end: "PTR_FORMAT,
17937 78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang drchase parents: 17844 diff changeset	828 p2i(_finger), p2i(_heap_end)));
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	829 update_g1_committed(true);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	830 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	831 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	832
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	833 void ConcurrentMark::set_non_marking_state() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	834 // 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	835 // not doing marking.
7450 d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	836 reset_marking_state();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	837 _active_tasks = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	838 clear_concurrent_marking_in_progress();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	839 }
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 ConcurrentMark::~ConcurrentMark() {
4735 776173fc2df9 7125516: G1: ~ConcurrentMark() frees incorrectly stefank parents: 4728 diff changeset	842 // The ConcurrentMark instance is never freed.
776173fc2df9 7125516: G1: ~ConcurrentMark() frees incorrectly stefank parents: 4728 diff changeset	843 ShouldNotReachHere();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	844 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	845
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	846 void ConcurrentMark::clearNextBitmap() {
1359 23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	847 G1CollectedHeap* g1h = G1CollectedHeap::heap();
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	848 G1CollectorPolicy* g1p = g1h->g1_policy();
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 // 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	851 // the current cycle.
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	852 guarantee(cmThread()->during_cycle(), "invariant");
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	853
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	854 // 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	855 // 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	856 // 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	857 // is the case.
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	858 guarantee(!g1h->mark_in_progress(), "invariant");
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	859
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	860 // 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	861 // 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	862 // each chunk.
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	863 HeapWord* start = _nextMarkBitMap->startWord();
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	864 HeapWord* end = _nextMarkBitMap->endWord();
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	865 HeapWord* cur = start;
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	866 size_t chunkSize = M;
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	867 while (cur < end) {
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	868 HeapWord* next = cur + chunkSize;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	869 if (next > end) {
1359 23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	870 next = end;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	871 }
1359 23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	872 MemRegion mr(cur,next);
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	873 _nextMarkBitMap->clearRange(mr);
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	874 cur = next;
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	875 do_yield_check();
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	876
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	877 // 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	878 // 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	879 // 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	880 // clearing to get some checking in the product.
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	881 assert(cmThread()->during_cycle(), "invariant");
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	882 assert(!g1h->mark_in_progress(), "invariant");
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	883 }
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	884
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	885 // Clear the liveness counting data
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	886 clear_all_count_data();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	887
1359 23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	888 // Repeat the asserts from above.
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	889 guarantee(cmThread()->during_cycle(), "invariant");
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1358 diff changeset	890 guarantee(!g1h->mark_in_progress(), "invariant");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	891 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	892
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	893 class NoteStartOfMarkHRClosure: public HeapRegionClosure {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	894 public:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	895 bool doHeapRegion(HeapRegion* r) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	896 if (!r->continuesHumongous()) {
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	897 r->note_start_of_marking();
342 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 return false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	900 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	901 };
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 void ConcurrentMark::checkpointRootsInitialPre() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	904 G1CollectedHeap* g1h = G1CollectedHeap::heap();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	905 G1CollectorPolicy* g1p = g1h->g1_policy();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	906
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	907 _has_aborted = false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	908
1547 fb1a39993f69 6951319: enable solaris builds using Sun Studio 12 update 1 jcoomes parents: 1388 diff changeset	909 #ifndef PRODUCT
1044 6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	910 if (G1PrintReachableAtInitialMark) {
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	911 print_reachable("at-cycle-start",
3772 6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	912 VerifyOption_G1UsePrevMarking, true /* all */);
1044 6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	913 }
1547 fb1a39993f69 6951319: enable solaris builds using Sun Studio 12 update 1 jcoomes parents: 1388 diff changeset	914 #endif
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	915
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	916 // 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	917 reset();
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	918
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	919 // For each region note start of marking.
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	920 NoteStartOfMarkHRClosure startcl;
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	921 g1h->heap_region_iterate(&startcl);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	922 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	923
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	924
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	925 void ConcurrentMark::checkpointRootsInitialPost() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	926 G1CollectedHeap* g1h = G1CollectedHeap::heap();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	927
3316 cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	928 // 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	929 // 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	930 // 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	931 // 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	932 // 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	933 // 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	934 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	935
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	936 // Start Concurrent Marking weak-reference discovery.
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	937 ReferenceProcessor* rp = g1h->ref_processor_cm();
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	938 // enable ("weak") refs discovery
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	939 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	940 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	941
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	942 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	943 // 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	944 // 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	945 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	946 false /* expected_active */);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	947
4837 eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	948 _root_regions.prepare_for_scan();
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	949
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	950 // 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	951 // 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	952 // 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	953 // during it. No need to call it here.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	954 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	955
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	956 /*
3316 cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	957 * 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	958 * 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	959 * 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	960 * 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	961 * 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	962 * 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	963 *
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	964 * 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	965 * 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	966 * 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	967 * (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	968 * 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	969 *
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	970 * 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	971 * 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	972 * 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	973 * 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	974 * 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	975 */
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	976
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	977 void ConcurrentMark::enter_first_sync_barrier(uint worker_id) {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	978 if (verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	979 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	980 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	981
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()) {
20192 581e70386ec9 8039147: Cleanup SuspendibleThreadSet pliden parents: 20190 diff changeset	983 SuspendibleThreadSet::leave();
3316 cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	984 }
17949 487f09bf44e0 8040803: G1: Concurrent mark hangs when mark stack overflows pliden parents: 17937 diff changeset	985
487f09bf44e0 8040803: G1: Concurrent mark hangs when mark stack overflows pliden parents: 17937 diff changeset	986 bool barrier_aborted = !_first_overflow_barrier_sync.enter();
487f09bf44e0 8040803: G1: Concurrent mark hangs when mark stack overflows pliden parents: 17937 diff changeset	987
3316 cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	988 if (concurrent()) {
20192 581e70386ec9 8039147: Cleanup SuspendibleThreadSet pliden parents: 20190 diff changeset	989 SuspendibleThreadSet::join();
3316 cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	990 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	991 // 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	992 // more work
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	993
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	994 if (verbose_low()) {
17949 487f09bf44e0 8040803: G1: Concurrent mark hangs when mark stack overflows pliden parents: 17937 diff changeset	995 if (barrier_aborted) {
487f09bf44e0 8040803: G1: Concurrent mark hangs when mark stack overflows pliden parents: 17937 diff changeset	996 gclog_or_tty->print_cr("[%u] aborted first barrier", worker_id);
487f09bf44e0 8040803: G1: Concurrent mark hangs when mark stack overflows pliden parents: 17937 diff changeset	997 } else {
487f09bf44e0 8040803: G1: Concurrent mark hangs when mark stack overflows pliden parents: 17937 diff changeset	998 gclog_or_tty->print_cr("[%u] leaving first barrier", worker_id);
487f09bf44e0 8040803: G1: Concurrent mark hangs when mark stack overflows pliden parents: 17937 diff changeset	999 }
487f09bf44e0 8040803: G1: Concurrent mark hangs when mark stack overflows pliden parents: 17937 diff changeset	1000 }
487f09bf44e0 8040803: G1: Concurrent mark hangs when mark stack overflows pliden parents: 17937 diff changeset	1001
487f09bf44e0 8040803: G1: Concurrent mark hangs when mark stack overflows pliden parents: 17937 diff changeset	1002 if (barrier_aborted) {
487f09bf44e0 8040803: G1: Concurrent mark hangs when mark stack overflows pliden parents: 17937 diff changeset	1003 // If the barrier aborted we ignore the overflow condition and
487f09bf44e0 8040803: G1: Concurrent mark hangs when mark stack overflows pliden parents: 17937 diff changeset	1004 // just abort the whole marking phase as quickly as possible.
487f09bf44e0 8040803: G1: Concurrent mark hangs when mark stack overflows pliden parents: 17937 diff changeset	1005 return;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	1006 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1007
8788 e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	1008 // 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	1009 // 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	1010 // during the remark pause.
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	1011 // 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	1012 // 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	1013 // calls.
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	1014 if (concurrent()) {
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	1015 // 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	1016 if (worker_id == 0) {
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	1017 // 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	1018 // 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	1019 // 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	1020 // 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	1021 // marking.
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	1022 reset_marking_state(true /* clear_overflow */);
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	1023 force_overflow()->update();
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	1024
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	1025 if (G1Log::fine()) {
20190 0982ec23da03 8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps brutisso parents: 17950 diff changeset	1026 gclog_or_tty->gclog_stamp(concurrent_gc_id());
8788 e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	1027 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	1028 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1029 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1030 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1031
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1032 // after this, each task should reset its own data structures then
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1033 // then go into the second barrier
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1034 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1035
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	1036 void ConcurrentMark::enter_second_sync_barrier(uint worker_id) {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	1037 if (verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	1038 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	1039 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1040
3316 cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1041 if (concurrent()) {
20192 581e70386ec9 8039147: Cleanup SuspendibleThreadSet pliden parents: 20190 diff changeset	1042 SuspendibleThreadSet::leave();
3316 cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1043 }
17949 487f09bf44e0 8040803: G1: Concurrent mark hangs when mark stack overflows pliden parents: 17937 diff changeset	1044
487f09bf44e0 8040803: G1: Concurrent mark hangs when mark stack overflows pliden parents: 17937 diff changeset	1045 bool barrier_aborted = !_second_overflow_barrier_sync.enter();
487f09bf44e0 8040803: G1: Concurrent mark hangs when mark stack overflows pliden parents: 17937 diff changeset	1046
3316 cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1047 if (concurrent()) {
20192 581e70386ec9 8039147: Cleanup SuspendibleThreadSet pliden parents: 20190 diff changeset	1048 SuspendibleThreadSet::join();
3316 cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1049 }
8788 e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	1050 // 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	1051
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	1052 if (verbose_low()) {
17949 487f09bf44e0 8040803: G1: Concurrent mark hangs when mark stack overflows pliden parents: 17937 diff changeset	1053 if (barrier_aborted) {
487f09bf44e0 8040803: G1: Concurrent mark hangs when mark stack overflows pliden parents: 17937 diff changeset	1054 gclog_or_tty->print_cr("[%u] aborted second barrier", worker_id);
487f09bf44e0 8040803: G1: Concurrent mark hangs when mark stack overflows pliden parents: 17937 diff changeset	1055 } else {
487f09bf44e0 8040803: G1: Concurrent mark hangs when mark stack overflows pliden parents: 17937 diff changeset	1056 gclog_or_tty->print_cr("[%u] leaving second barrier", worker_id);
487f09bf44e0 8040803: G1: Concurrent mark hangs when mark stack overflows pliden parents: 17937 diff changeset	1057 }
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	1058 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1059 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1060
3316 cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1061 #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	1062 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	1063 _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	1064 _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	1065 update();
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1066 }
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1067
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1068 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	1069 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	1070 _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	1071 _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	1072 } else {
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1073 _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	1074 }
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1075 }
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1076
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1077 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	1078 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	1079 _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	1080 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	1081 } else {
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1082 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	1083 }
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1084 }
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	1085 #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	1086
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1087 class CMConcurrentMarkingTask: public AbstractGangTask {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1088 private:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1089 ConcurrentMark* _cm;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1090 ConcurrentMarkThread* _cmt;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1091
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1092 public:
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1093 void work(uint worker_id) {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	1094 assert(Thread::current()->is_ConcurrentGC_thread(),
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	1095 "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	1096 ResourceMark rm;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1097
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1098 double start_vtime = os::elapsedVTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1099
20192 581e70386ec9 8039147: Cleanup SuspendibleThreadSet pliden parents: 20190 diff changeset	1100 SuspendibleThreadSet::join();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1101
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1102 assert(worker_id < _cm->active_tasks(), "invariant");
441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1103 CMTask* the_task = _cm->task(worker_id);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1104 the_task->record_start_time();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1105 if (!_cm->has_aborted()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1106 do {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1107 double start_vtime_sec = os::elapsedVTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1108 double start_time_sec = os::elapsedTime();
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	1109 double mark_step_duration_ms = G1ConcMarkStepDurationMillis;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	1110
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	1111 the_task->do_marking_step(mark_step_duration_ms,
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	1112 true /* do_termination */,
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	1113 false /* is_serial*/);
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	1114
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1115 double end_time_sec = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1116 double end_vtime_sec = os::elapsedVTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1117 double elapsed_vtime_sec = end_vtime_sec - start_vtime_sec;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1118 double elapsed_time_sec = end_time_sec - start_time_sec;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1119 _cm->clear_has_overflown();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1120
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1121 bool ret = _cm->do_yield_check(worker_id);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1122
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1123 jlong sleep_time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1124 if (!_cm->has_aborted() && the_task->has_aborted()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1125 sleep_time_ms =
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1126 (jlong) (elapsed_vtime_sec * _cm->sleep_factor() * 1000.0);
20192 581e70386ec9 8039147: Cleanup SuspendibleThreadSet pliden parents: 20190 diff changeset	1127 SuspendibleThreadSet::leave();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1128 os::sleep(Thread::current(), sleep_time_ms, false);
20192 581e70386ec9 8039147: Cleanup SuspendibleThreadSet pliden parents: 20190 diff changeset	1129 SuspendibleThreadSet::join();
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 double end_time2_sec = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1132 double elapsed_time2_sec = end_time2_sec - start_time_sec;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1133
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1134 #if 0
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1135 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	1136 "overhead %1.4lf",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1137 elapsed_vtime_sec * 1000.0, (double) sleep_time_ms,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1138 the_task->conc_overhead(os::elapsedTime()) * 8.0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1139 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	1140 elapsed_time_sec * 1000.0, elapsed_time2_sec * 1000.0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1141 #endif
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1142 } while (!_cm->has_aborted() && the_task->has_aborted());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1143 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1144 the_task->record_end_time();
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	1145 guarantee(!the_task->has_aborted() \|\| _cm->has_aborted(), "invariant");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1146
20192 581e70386ec9 8039147: Cleanup SuspendibleThreadSet pliden parents: 20190 diff changeset	1147 SuspendibleThreadSet::leave();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1148
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1149 double end_vtime = os::elapsedVTime();
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1150 _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	1151 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1152
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1153 CMConcurrentMarkingTask(ConcurrentMark* cm,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1154 ConcurrentMarkThread* cmt) :
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1155 AbstractGangTask("Concurrent Mark"), _cm(cm), _cmt(cmt) { }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1156
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1157 ~CMConcurrentMarkingTask() { }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1158 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1159
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1160 // Calculates the number of active workers for a concurrent
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1161 // phase.
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1162 uint ConcurrentMark::calc_parallel_marking_threads() {
4711 adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	1163 if (G1CollectedHeap::use_parallel_gc_threads()) {
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1164 uint n_conc_workers = 0;
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1165 if (!UseDynamicNumberOfGCThreads \|\|
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1166 (!FLAG_IS_DEFAULT(ConcGCThreads) &&
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1167 !ForceDynamicNumberOfGCThreads)) {
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1168 n_conc_workers = max_parallel_marking_threads();
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1169 } else {
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1170 n_conc_workers =
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1171 AdaptiveSizePolicy::calc_default_active_workers(
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1172 max_parallel_marking_threads(),
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1173 1, /* Minimum workers */
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1174 parallel_marking_threads(),
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1175 Threads::number_of_non_daemon_threads());
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1176 // 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	1177 // 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	1178 }
4711 adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	1179 assert(n_conc_workers > 0, "Always need at least 1");
adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	1180 return n_conc_workers;
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1181 }
4711 adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	1182 // 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	1183 // have spawned any marking threads either. Hence the number of
adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	1184 // concurrent workers should be 0.
adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	1185 return 0;
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1186 }
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1187
4837 eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1188 void ConcurrentMark::scanRootRegion(HeapRegion* hr, uint worker_id) {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1189 // Currently, only survivors can be root regions.
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1190 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	1191 G1RootRegionScanClosure cl(_g1h, this, worker_id);
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1192
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1193 const uintx interval = PrefetchScanIntervalInBytes;
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1194 HeapWord* curr = hr->bottom();
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1195 const HeapWord* end = hr->top();
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1196 while (curr < end) {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1197 Prefetch::read(curr, interval);
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1198 oop obj = oop(curr);
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1199 int size = obj->oop_iterate(&cl);
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1200 assert(size == obj->size(), "sanity");
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1201 curr += size;
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 class CMRootRegionScanTask : public AbstractGangTask {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1206 private:
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1207 ConcurrentMark* _cm;
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1208
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1209 public:
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1210 CMRootRegionScanTask(ConcurrentMark* cm) :
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1211 AbstractGangTask("Root Region Scan"), _cm(cm) { }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1212
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1213 void work(uint worker_id) {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1214 assert(Thread::current()->is_ConcurrentGC_thread(),
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1215 "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	1216
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1217 CMRootRegions* root_regions = _cm->root_regions();
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1218 HeapRegion* hr = root_regions->claim_next();
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1219 while (hr != NULL) {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1220 _cm->scanRootRegion(hr, worker_id);
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1221 hr = root_regions->claim_next();
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 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1224 };
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1225
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1226 void ConcurrentMark::scanRootRegions() {
20278 2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	1227 // Start of concurrent marking.
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	1228 ClassLoaderDataGraph::clear_claimed_marks();
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	1229
4837 eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1230 // 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	1231 // 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	1232 // should not attempt to do any further work.
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1233 if (root_regions()->scan_in_progress()) {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1234 _parallel_marking_threads = calc_parallel_marking_threads();
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1235 assert(parallel_marking_threads() <= max_parallel_marking_threads(),
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1236 "Maximum number of marking threads exceeded");
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1237 uint active_workers = MAX2(1U, parallel_marking_threads());
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1238
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1239 CMRootRegionScanTask task(this);
8008 256d3f43c177 8005875: G1: Kitchensink fails with ParallelGCThreads=0 johnc parents: 8006 diff changeset	1240 if (use_parallel_marking_threads()) {
4837 eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1241 _parallel_workers->set_active_workers((int) active_workers);
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1242 _parallel_workers->run_task(&task);
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1243 } else {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1244 task.work(0);
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1245 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1246
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1247 // 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	1248 // 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	1249 // mainly used for sanity checking.
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1250 root_regions()->scan_finished();
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1251 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1252 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4836 diff changeset	1253
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1254 void ConcurrentMark::markFromRoots() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1255 // we might be tempted to assert that:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1256 // assert(asynch == !SafepointSynchronize::is_at_safepoint(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1257 // "inconsistent argument?");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1258 // However that wouldn't be right, because it's possible that
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1259 // a safepoint is indeed in progress as a younger generation
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1260 // 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	1261
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1262 _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	1263 force_overflow_conc()->init();
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1264
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1265 // _g1h has _n_par_threads
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1266 _parallel_marking_threads = calc_parallel_marking_threads();
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1267 assert(parallel_marking_threads() <= max_parallel_marking_threads(),
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1268 "Maximum number of marking threads exceeded");
4711 adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	1269
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1270 uint active_workers = MAX2(1U, parallel_marking_threads());
4711 adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	1271
8788 e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	1272 // 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	1273 set_concurrency_and_phase(active_workers, true /* concurrent */);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1274
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1275 CMConcurrentMarkingTask markingTask(this, cmThread());
8008 256d3f43c177 8005875: G1: Kitchensink fails with ParallelGCThreads=0 johnc parents: 8006 diff changeset	1276 if (use_parallel_marking_threads()) {
4711 adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	1277 _parallel_workers->set_active_workers((int)active_workers);
20278 2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	1278 // Don't set _n_par_threads because it affects MT in process_roots()
4711 adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	1279 // and the decisions on that MT processing is made elsewhere.
adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	1280 assert(_parallel_workers->active_workers() > 0, "Should have been set");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1281 _parallel_workers->run_task(&markingTask);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	1282 } else {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1283 markingTask.work(0);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	1284 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1285 print_stats();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1286 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1287
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1288 void ConcurrentMark::checkpointRootsFinal(bool clear_all_soft_refs) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1289 // world is stopped at this checkpoint
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1290 assert(SafepointSynchronize::is_at_safepoint(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1291 "world should be stopped");
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	1292
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1293 G1CollectedHeap* g1h = G1CollectedHeap::heap();
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 // If a full collection has happened, we shouldn't do this.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1296 if (has_aborted()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1297 g1h->set_marking_complete(); // So bitmap clearing isn't confused
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1298 return;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1299 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1300
2125 7246a374a9f2 6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent kamg parents: 2037 diff changeset	1301 SvcGCMarker sgcm(SvcGCMarker::OTHER);
7246a374a9f2 6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent kamg parents: 2037 diff changeset	1302
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	1303 if (VerifyDuringGC) {
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	1304 HandleMark hm; // handle scope
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	1305 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	1306 Universe::verify(VerifyOption_G1UsePrevMarking,
b06ac540229e 8013132: Add a flag to turn off the output of the verbose verification code stefank parents: 9076 diff changeset	1307 " VerifyDuringGC:(before)");
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	1308 }
20291 e0954897238a 7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS brutisso parents: 20282 diff changeset	1309 g1h->check_bitmaps("Remark Start");
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	1310
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1311 G1CollectorPolicy* g1p = g1h->g1_policy();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1312 g1p->record_concurrent_mark_remark_start();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1313
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1314 double start = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1315
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1316 checkpointRootsFinalWork();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1317
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1318 double mark_work_end = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1319
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1320 weakRefsWork(clear_all_soft_refs);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1321
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1322 if (has_overflown()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1323 // Oops. We overflowed. Restart concurrent marking.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1324 _restart_for_overflow = true;
8789 1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure johnc parents: 8788 diff changeset	1325 if (G1TraceMarkStackOverflow) {
1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure johnc parents: 8788 diff changeset	1326 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	1327 }
1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure johnc parents: 8788 diff changeset	1328
1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure johnc parents: 8788 diff changeset	1329 // 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	1330 if (VerifyDuringGC) {
1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure johnc parents: 8788 diff changeset	1331 HandleMark hm; // handle scope
1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure johnc parents: 8788 diff changeset	1332 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	1333 Universe::verify(VerifyOption_G1UsePrevMarking,
b06ac540229e 8013132: Add a flag to turn off the output of the verbose verification code stefank parents: 9076 diff changeset	1334 " VerifyDuringGC:(overflow)");
8789 1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure johnc parents: 8788 diff changeset	1335 }
1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure johnc parents: 8788 diff changeset	1336
7450 d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	1337 // Clear the marking state because we will be restarting
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	1338 // marking due to overflowing the global mark stack.
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	1339 reset_marking_state();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1340 } else {
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1341 // 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	1342 // while marking.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1343 aggregate_count_data();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1344
2149 7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 2125 diff changeset	1345 SATBMarkQueueSet& satb_mq_set = JavaThread::satb_mark_queue_set();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1346 // We're done with marking.
1317 d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1314 diff changeset	1347 // 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	1348 // threads to have SATB queues with active set to true.
2149 7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 2125 diff changeset	1349 satb_mq_set.set_active_all_threads(false, /* new active value */
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 2125 diff changeset	1350 true /* expected_active */);
811 830ca2573896 6850846: G1: extend G1 marking verification tonyp parents: 751 diff changeset	1351
830ca2573896 6850846: G1: extend G1 marking verification tonyp parents: 751 diff changeset	1352 if (VerifyDuringGC) {
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	1353 HandleMark hm; // handle scope
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	1354 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	1355 Universe::verify(VerifyOption_G1UseNextMarking,
b06ac540229e 8013132: Add a flag to turn off the output of the verbose verification code stefank parents: 9076 diff changeset	1356 " VerifyDuringGC:(after)");
811 830ca2573896 6850846: G1: extend G1 marking verification tonyp parents: 751 diff changeset	1357 }
20291 e0954897238a 7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS brutisso parents: 20282 diff changeset	1358 g1h->check_bitmaps("Remark End");
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	1359 assert(!restart_for_overflow(), "sanity");
7450 d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	1360 // Completely reset the marking state since marking completed
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	1361 set_non_marking_state();
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	1362 }
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	1363
7397 442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	1364 // 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	1365 if (_markStack.should_expand()) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	1366 _markStack.expand();
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	1367 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack johnc parents: 6865 diff changeset	1368
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1369 // Statistics
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1370 double now = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1371 _remark_mark_times.add((mark_work_end - start) * 1000.0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1372 _remark_weak_ref_times.add((now - mark_work_end) * 1000.0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1373 _remark_times.add((now - start) * 1000.0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1374
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1375 g1p->record_concurrent_mark_remark_end();
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	1376
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	1377 G1CMIsAliveClosure is_alive(g1h);
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	1378 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	1379 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1380
6027 8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1381 // 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	1382 // liveness counting data.
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1383 class CMCountDataClosureBase: public HeapRegionClosure {
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1384 protected:
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1385 G1CollectedHeap* _g1h;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1386 ConcurrentMark* _cm;
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1387 CardTableModRefBS* _ct_bs;
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1388
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1389 BitMap* _region_bm;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1390 BitMap* _card_bm;
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1391
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1392 // 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	1393 // 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	1394 // 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	1395 // 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	1396 // associated "continues humongous" regions.
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1397 void set_bit_for_region(HeapRegion* hr) {
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1398 assert(!hr->continuesHumongous(), "should have filtered those out");
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1399
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	1400 BitMap::idx_t index = (BitMap::idx_t) hr->hrs_index();
829 30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1401 if (!hr->startsHumongous()) {
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1402 // 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	1403 _region_bm->par_at_put(index, true);
829 30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1404 } else {
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1405 // 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	1406 // 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	1407 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	1408 _region_bm->par_at_put_range(index, end_index, true);
829 30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1409 }
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1410 }
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1411
6027 8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1412 public:
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1413 CMCountDataClosureBase(G1CollectedHeap* g1h,
6027 8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1414 BitMap* region_bm, BitMap* card_bm):
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1415 _g1h(g1h), _cm(g1h->concurrent_mark()),
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1416 _ct_bs((CardTableModRefBS*) (g1h->barrier_set())),
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1417 _region_bm(region_bm), _card_bm(card_bm) { }
6027 8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1418 };
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1419
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1420 // Closure that calculates the # live objects per region. Used
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1421 // for verification purposes during the cleanup pause.
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1422 class CalcLiveObjectsClosure: public CMCountDataClosureBase {
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1423 CMBitMapRO* _bm;
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1424 size_t _region_marked_bytes;
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1425
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1426 public:
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1427 CalcLiveObjectsClosure(CMBitMapRO bm, G1CollectedHeap g1h,
6027 8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1428 BitMap* region_bm, BitMap* card_bm) :
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1429 CMCountDataClosureBase(g1h, region_bm, card_bm),
6027 8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1430 _bm(bm), _region_marked_bytes(0) { }
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1431
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1432 bool doHeapRegion(HeapRegion* hr) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1433
639 922c573ea67d 6815683: G1: SEGV during marking iveresov parents: 619 diff changeset	1434 if (hr->continuesHumongous()) {
829 30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1435 // We will ignore these here and process them when their
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1436 // associated "starts humongous" region is processed (see
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1437 // 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	1438 // associated "starts humongous" region to have their bit set to
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1439 // 1 since, due to the region chunking in the parallel region
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1440 // iteration, a "continues humongous" region might be visited
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1441 // before its associated "starts humongous".
639 922c573ea67d 6815683: G1: SEGV during marking iveresov parents: 619 diff changeset	1442 return false;
922c573ea67d 6815683: G1: SEGV during marking iveresov parents: 619 diff changeset	1443 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1444
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1445 HeapWord* ntams = hr->next_top_at_mark_start();
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1446 HeapWord* start = hr->bottom();
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1447
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1448 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	1449 err_msg("Preconditions not met - "
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1450 "start: "PTR_FORMAT", ntams: "PTR_FORMAT", end: "PTR_FORMAT,
17937 78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang drchase parents: 17844 diff changeset	1451 p2i(start), p2i(ntams), p2i(hr->end())));
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1452
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1453 // Find the first marked object at or after "start".
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1454 start = _bm->getNextMarkedWordAddress(start, ntams);
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 size_t marked_bytes = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1457
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1458 while (start < ntams) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1459 oop obj = oop(start);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1460 int obj_sz = obj->size();
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1461 HeapWord* obj_end = start + obj_sz;
6027 8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1462
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1463 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	1464 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	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 - obj_end
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(obj_end) && !_ct_bs->is_card_aligned(obj_end)) {
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
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1476 // 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	1477 _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	1478
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1479 // 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	1480 marked_bytes += (size_t)obj_sz * HeapWordSize;
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1481
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1482 // Find the next marked object after this one.
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1483 start = _bm->getNextMarkedWordAddress(obj_end, ntams);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 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 // Mark the allocated-since-marking portion...
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1487 HeapWord* top = hr->top();
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1488 if (ntams < top) {
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1489 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	1490 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	1491
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1492 // 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	1493 // 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	1494 // 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	1495 // just beyond the heap.
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1496 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	1497 // end of object is not card aligned - increment to cover
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1498 // all the cards spanned by the object
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1499 end_idx += 1;
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1500 }
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1501 _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	1502
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1503 // This definitely means the region has live objects.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1504 set_bit_for_region(hr);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1505 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1506
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1507 // Update the live region bitmap.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1508 if (marked_bytes > 0) {
829 30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much tonyp parents: 811 diff changeset	1509 set_bit_for_region(hr);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1510 }
4836 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 // 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	1513 // it can be queried by a calling verificiation routine
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1514 _region_marked_bytes = marked_bytes;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1515
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1516 return false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1517 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1518
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1519 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	1520 };
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1521
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1522 // Heap region closure used for verifying the counting data
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1523 // that was accumulated concurrently and aggregated during
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1524 // 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	1525 // regions during the STW cleanup pause.
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 class VerifyLiveObjectDataHRClosure: public HeapRegionClosure {
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1528 G1CollectedHeap* _g1h;
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1529 ConcurrentMark* _cm;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1530 CalcLiveObjectsClosure _calc_cl;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1531 BitMap* _region_bm; // Region BM to be verified
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1532 BitMap* _card_bm; // Card BM to be verified
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1533 bool _verbose; // verbose output?
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1534
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1535 BitMap* _exp_region_bm; // Expected Region BM values
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1536 BitMap* _exp_card_bm; // Expected card BM values
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1537
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1538 int _failures;
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 public:
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1541 VerifyLiveObjectDataHRClosure(G1CollectedHeap* g1h,
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1542 BitMap* region_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1543 BitMap* card_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1544 BitMap* exp_region_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1545 BitMap* exp_card_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1546 bool verbose) :
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1547 _g1h(g1h), _cm(g1h->concurrent_mark()),
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1548 _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	1549 _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	1550 _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	1551 _failures(0) { }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1552
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1553 int failures() const { return _failures; }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1554
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1555 bool doHeapRegion(HeapRegion* hr) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1556 if (hr->continuesHumongous()) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1557 // 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	1558 // associated "starts humongous" region is processed (see
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1559 // 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	1560 // 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	1561 // 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	1562 // iteration, a "continues humongous" region might be visited
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1563 // before its associated "starts humongous".
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1564 return false;
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 int failures = 0;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1568
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1569 // Call the CalcLiveObjectsClosure to walk the marking bitmap for
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1570 // 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	1571 // and card bitmaps.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1572 bool res = _calc_cl.doHeapRegion(hr);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1573 assert(res == false, "should be continuing");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1574
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1575 MutexLockerEx x((_verbose ? ParGCRareEvent_lock : NULL),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1576 Mutex::_no_safepoint_check_flag);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1577
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1578 // Verify the marked bytes for this region.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1579 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	1580 size_t act_marked_bytes = hr->next_marked_bytes();
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 // 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	1583 // 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	1584 if (exp_marked_bytes > act_marked_bytes) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1585 if (_verbose) {
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	1586 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	1587 "expected: " SIZE_FORMAT ", actual: " SIZE_FORMAT,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1588 hr->hrs_index(), exp_marked_bytes, act_marked_bytes);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1589 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1590 failures += 1;
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
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1593 // 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	1594 // (which was just calculated) region bit maps.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1595 // 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	1596 // 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	1597 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	1598
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1599 bool expected = _exp_region_bm->at(index);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1600 bool actual = _region_bm->at(index);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1601 if (expected && !actual) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1602 if (_verbose) {
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	1603 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	1604 "expected: %s, actual: %s",
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	1605 hr->hrs_index(),
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	1606 BOOL_TO_STR(expected), BOOL_TO_STR(actual));
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1607 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1608 failures += 1;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1609 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1610
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1611 // 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	1612 // 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	1613 // 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	1614
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1615 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	1616 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	1617
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1618 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	1619 expected = _exp_card_bm->at(i);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1620 actual = _card_bm->at(i);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1621
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1622 if (expected && !actual) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1623 if (_verbose) {
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	1624 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	1625 "expected: %s, actual: %s",
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	1626 hr->hrs_index(), i,
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	1627 BOOL_TO_STR(expected), BOOL_TO_STR(actual));
4836 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 failures += 1;
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 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1632
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1633 if (failures > 0 && _verbose) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1634 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	1635 "marked_bytes: calc/actual " SIZE_FORMAT "/" SIZE_FORMAT,
17937 78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang drchase parents: 17844 diff changeset	1636 HR_FORMAT_PARAMS(hr), p2i(hr->next_top_at_mark_start()),
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1637 _calc_cl.region_marked_bytes(), hr->next_marked_bytes());
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1638 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1639
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1640 _failures += failures;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1641
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1642 // 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	1643 // find the first violating region by returning true.
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1644 return false;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1645 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1646 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1647
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1648 class G1ParVerifyFinalCountTask: public AbstractGangTask {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1649 protected:
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1650 G1CollectedHeap* _g1h;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1651 ConcurrentMark* _cm;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1652 BitMap* _actual_region_bm;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1653 BitMap* _actual_card_bm;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1654
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1655 uint _n_workers;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1656
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1657 BitMap* _expected_region_bm;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1658 BitMap* _expected_card_bm;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1659
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1660 int _failures;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1661 bool _verbose;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1662
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1663 public:
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1664 G1ParVerifyFinalCountTask(G1CollectedHeap* g1h,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1665 BitMap* region_bm, BitMap* card_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1666 BitMap* expected_region_bm, BitMap* expected_card_bm)
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1667 : AbstractGangTask("G1 verify final counting"),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1668 _g1h(g1h), _cm(_g1h->concurrent_mark()),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1669 _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	1670 _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	1671 _failures(0), _verbose(false),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1672 _n_workers(0) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1673 assert(VerifyDuringGC, "don't call this otherwise");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1674
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1675 // 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	1676 // in the call to run_task().
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1677 if (G1CollectedHeap::use_parallel_gc_threads()) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1678 assert( _g1h->workers()->active_workers() > 0,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1679 "Should have been previously set");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1680 _n_workers = _g1h->workers()->active_workers();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1681 } else {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1682 _n_workers = 1;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1683 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1684
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1685 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	1686 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	1687
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1688 _verbose = _cm->verbose_medium();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1689 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1690
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1691 void work(uint worker_id) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1692 assert(worker_id < _n_workers, "invariant");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1693
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1694 VerifyLiveObjectDataHRClosure verify_cl(_g1h,
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1695 _actual_region_bm, _actual_card_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1696 _expected_region_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1697 _expected_card_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1698 _verbose);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1699
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1700 if (G1CollectedHeap::use_parallel_gc_threads()) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1701 _g1h->heap_region_par_iterate_chunked(&verify_cl,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1702 worker_id,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1703 _n_workers,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1704 HeapRegion::VerifyCountClaimValue);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1705 } else {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1706 _g1h->heap_region_iterate(&verify_cl);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1707 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1708
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1709 Atomic::add(verify_cl.failures(), &_failures);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1710 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1711
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1712 int failures() const { return _failures; }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1713 };
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1714
6027 8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1715 // Closure that finalizes the liveness counting data.
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1716 // Used during the cleanup pause.
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1717 // Sets the bits corresponding to the interval [NTAMS, top]
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1718 // (which contains the implicitly live objects) in the
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1719 // 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	1720 // containing live data, in the region liveness bitmap.
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1721
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1722 class FinalCountDataUpdateClosure: public CMCountDataClosureBase {
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1723 public:
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1724 FinalCountDataUpdateClosure(G1CollectedHeap* g1h,
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1725 BitMap* region_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1726 BitMap* card_bm) :
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1727 CMCountDataClosureBase(g1h, region_bm, card_bm) { }
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1728
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1729 bool doHeapRegion(HeapRegion* hr) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1730
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1731 if (hr->continuesHumongous()) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1732 // 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	1733 // associated "starts humongous" region is processed (see
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1734 // 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	1735 // 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	1736 // 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	1737 // iteration, a "continues humongous" region might be visited
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1738 // before its associated "starts humongous".
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1739 return false;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1740 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1741
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1742 HeapWord* ntams = hr->next_top_at_mark_start();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1743 HeapWord* top = hr->top();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1744
6027 8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1745 assert(hr->bottom() <= ntams && ntams <= hr->end(), "Preconditions.");
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1746
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1747 // Mark the allocated-since-marking portion...
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1748 if (ntams < top) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1749 // This definitely means the region has live objects.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1750 set_bit_for_region(hr);
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1751
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1752 // 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	1753 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	1754 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	1755
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1756 // 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	1757 // 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	1758 // 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	1759 // just beyond the heap.
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1760 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	1761 // end of object is not card aligned - increment to cover
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1762 // all the cards spanned by the object
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1763 end_idx += 1;
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1764 }
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1765
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1766 assert(end_idx <= _card_bm->size(),
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1767 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	1768 end_idx, _card_bm->size()));
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1769 assert(start_idx < _card_bm->size(),
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1770 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	1771 start_idx, _card_bm->size()));
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1772
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1773 _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	1774 }
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1775
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1776 // 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	1777 if (hr->next_marked_bytes() > 0) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1778 set_bit_for_region(hr);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1779 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1780
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1781 return false;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1782 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1783 };
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1784
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1785 class G1ParFinalCountTask: public AbstractGangTask {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1786 protected:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1787 G1CollectedHeap* _g1h;
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1788 ConcurrentMark* _cm;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1789 BitMap* _actual_region_bm;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1790 BitMap* _actual_card_bm;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1791
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1792 uint _n_workers;
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1793
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1794 public:
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1795 G1ParFinalCountTask(G1CollectedHeap* g1h, BitMap* region_bm, BitMap* card_bm)
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1796 : AbstractGangTask("G1 final counting"),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1797 _g1h(g1h), _cm(_g1h->concurrent_mark()),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1798 _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	1799 _n_workers(0) {
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1800 // 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	1801 // in the call to run_task().
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1802 if (G1CollectedHeap::use_parallel_gc_threads()) {
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1803 assert( _g1h->workers()->active_workers() > 0,
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1804 "Should have been previously set");
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	1805 _n_workers = _g1h->workers()->active_workers();
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	1806 } else {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1807 _n_workers = 1;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	1808 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1809 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1810
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1811 void work(uint worker_id) {
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1812 assert(worker_id < _n_workers, "invariant");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1813
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	1814 FinalCountDataUpdateClosure final_update_cl(_g1h,
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1815 _actual_region_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1816 _actual_card_bm);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1817
1833 8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1719 diff changeset	1818 if (G1CollectedHeap::use_parallel_gc_threads()) {
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1819 _g1h->heap_region_par_iterate_chunked(&final_update_cl,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1820 worker_id,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1821 _n_workers,
355 0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 343 diff changeset	1822 HeapRegion::FinalCountClaimValue);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1823 } else {
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1824 _g1h->heap_region_iterate(&final_update_cl);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1825 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1826 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1827 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1828
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1829 class G1ParNoteEndTask;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1830
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1831 class G1NoteEndOfConcMarkClosure : public HeapRegionClosure {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1832 G1CollectedHeap* _g1;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1833 size_t _max_live_bytes;
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	1834 uint _regions_claimed;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1835 size_t _freed_bytes;
2173 97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1836 FreeRegionList* _local_cleanup_list;
17736 58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17635 diff changeset	1837 HeapRegionSetCount _old_regions_removed;
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17635 diff changeset	1838 HeapRegionSetCount _humongous_regions_removed;
2173 97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1839 HRRSCleanupTask* _hrrs_cleanup_task;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1840 double _claimed_region_time;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1841 double _max_region_time;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1842
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1843 public:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1844 G1NoteEndOfConcMarkClosure(G1CollectedHeap* g1,
2173 97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1845 FreeRegionList* local_cleanup_list,
4093 6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	1846 HRRSCleanupTask* hrrs_cleanup_task) :
17844 8847586c9037 8016302: Change type of the number of GC workers to unsigned int (2) vkempik parents: 17841 diff changeset	1847 _g1(g1),
4093 6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	1848 _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	1849 _freed_bytes(0),
6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	1850 _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	1851 _local_cleanup_list(local_cleanup_list),
17736 58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17635 diff changeset	1852 _old_regions_removed(),
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17635 diff changeset	1853 _humongous_regions_removed(),
4093 6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	1854 _hrrs_cleanup_task(hrrs_cleanup_task) { }
6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	1855
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1856 size_t freed_bytes() { return _freed_bytes; }
17736 58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17635 diff changeset	1857 const HeapRegionSetCount& old_regions_removed() { return _old_regions_removed; }
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17635 diff changeset	1858 const HeapRegionSetCount& humongous_regions_removed() { return _humongous_regions_removed; }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1859
4093 6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	1860 bool doHeapRegion(HeapRegion *hr) {
6254 a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1861 if (hr->continuesHumongous()) {
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1862 return false;
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1863 }
4093 6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	1864 // 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	1865 // 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	1866 _g1->reset_gc_time_stamps(hr);
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1867 double start = os::elapsedTime();
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1868 _regions_claimed++;
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1869 hr->note_end_of_marking();
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1870 _max_live_bytes += hr->max_live_bytes();
17736 58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17635 diff changeset	1871
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17635 diff changeset	1872 if (hr->used() > 0 && hr->max_live_bytes() == 0 && !hr->is_young()) {
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17635 diff changeset	1873 _freed_bytes += hr->used();
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17635 diff changeset	1874 hr->set_containing_set(NULL);
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17635 diff changeset	1875 if (hr->isHumongous()) {
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17635 diff changeset	1876 assert(hr->startsHumongous(), "we should only see starts humongous");
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17635 diff changeset	1877 _humongous_regions_removed.increment(1u, hr->capacity());
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17635 diff changeset	1878 _g1->free_humongous_region(hr, _local_cleanup_list, true);
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17635 diff changeset	1879 } else {
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17635 diff changeset	1880 _old_regions_removed.increment(1u, hr->capacity());
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17635 diff changeset	1881 _g1->free_region(hr, _local_cleanup_list, true);
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17635 diff changeset	1882 }
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17635 diff changeset	1883 } else {
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17635 diff changeset	1884 hr->rem_set()->do_cleanup_work(_hrrs_cleanup_task);
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17635 diff changeset	1885 }
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17635 diff changeset	1886
6254 a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1887 double region_time = (os::elapsedTime() - start);
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1888 _claimed_region_time += region_time;
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1889 if (region_time > _max_region_time) {
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	1890 _max_region_time = region_time;
4093 6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	1891 }
6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	1892 return false;
6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	1893 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1894
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1895 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	1896 uint regions_claimed() { return _regions_claimed; }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1897 double claimed_region_time_sec() { return _claimed_region_time; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1898 double max_region_time_sec() { return _max_region_time; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1899 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1900
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1901 class G1ParNoteEndTask: public AbstractGangTask {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1902 friend class G1NoteEndOfConcMarkClosure;
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	1903
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1904 protected:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1905 G1CollectedHeap* _g1h;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1906 size_t _max_live_bytes;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1907 size_t _freed_bytes;
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	1908 FreeRegionList* _cleanup_list;
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	1909
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1910 public:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1911 G1ParNoteEndTask(G1CollectedHeap* g1h,
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	1912 FreeRegionList* cleanup_list) :
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1913 AbstractGangTask("G1 note end"), _g1h(g1h),
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	1914 _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	1915
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1916 void work(uint worker_id) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1917 double start = os::elapsedTime();
2173 97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1918 FreeRegionList local_cleanup_list("Local Cleanup List");
97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1919 HRRSCleanupTask hrrs_cleanup_task;
17844 8847586c9037 8016302: Change type of the number of GC workers to unsigned int (2) vkempik parents: 17841 diff changeset	1920 G1NoteEndOfConcMarkClosure g1_note_end(_g1h, &local_cleanup_list,
2173 97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1921 &hrrs_cleanup_task);
1833 8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1719 diff changeset	1922 if (G1CollectedHeap::use_parallel_gc_threads()) {
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1923 _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	1924 _g1h->workers()->active_workers(),
355 0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 343 diff changeset	1925 HeapRegion::NoteEndClaimValue);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1926 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1927 _g1h->heap_region_iterate(&g1_note_end);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1928 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1929 assert(g1_note_end.complete(), "Shouldn't have yielded!");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1930
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	1931 // Now update the lists
17736 58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17635 diff changeset	1932 _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	1933 {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1934 MutexLockerEx x(ParGCRareEvent_lock, Mutex::_no_safepoint_check_flag);
17736 58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17635 diff changeset	1935 _g1h->decrement_summary_bytes(g1_note_end.freed_bytes());
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1936 _max_live_bytes += g1_note_end.max_live_bytes();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1937 _freed_bytes += g1_note_end.freed_bytes();
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	1938
3778 5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3776 diff changeset	1939 // 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	1940 // 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	1941 // generate output for the newly-reclaimed regions (the list
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3776 diff changeset	1942 // 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	1943 // 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	1944 // 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	1945 // cleanup list.
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3776 diff changeset	1946
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3776 diff changeset	1947 G1HRPrinter* hr_printer = _g1h->hr_printer();
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3776 diff changeset	1948 if (hr_printer->is_active()) {
17736 58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17635 diff changeset	1949 FreeRegionListIterator iter(&local_cleanup_list);
3778 5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3776 diff changeset	1950 while (iter.more_available()) {
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3776 diff changeset	1951 HeapRegion* hr = iter.get_next();
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3776 diff changeset	1952 hr_printer->cleanup(hr);
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3776 diff changeset	1953 }
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3776 diff changeset	1954 }
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3776 diff changeset	1955
17773 8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17750 diff changeset	1956 _cleanup_list->add_ordered(&local_cleanup_list);
2173 97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1957 assert(local_cleanup_list.is_empty(), "post-condition");
97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1958
97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1959 HeapRegionRemSet::finish_cleanup_task(&hrrs_cleanup_task);
342 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 size_t max_live_bytes() { return _max_live_bytes; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1963 size_t freed_bytes() { return _freed_bytes; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1964 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1965
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1966 class G1ParScrubRemSetTask: public AbstractGangTask {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1967 protected:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1968 G1RemSet* _g1rs;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1969 BitMap* _region_bm;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1970 BitMap* _card_bm;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1971 public:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1972 G1ParScrubRemSetTask(G1CollectedHeap* g1h,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1973 BitMap* region_bm, BitMap* card_bm) :
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1974 AbstractGangTask("G1 ScrubRS"), _g1rs(g1h->g1_rem_set()),
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	1975 _region_bm(region_bm), _card_bm(card_bm) { }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1976
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1977 void work(uint worker_id) {
1833 8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1719 diff changeset	1978 if (G1CollectedHeap::use_parallel_gc_threads()) {
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	1979 _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	1980 HeapRegion::ScrubRemSetClaimValue);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1981 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1982 _g1rs->scrub(_region_bm, _card_bm);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1983 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1984 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1985
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1986 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1987
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1988 void ConcurrentMark::cleanup() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1989 // world is stopped at this checkpoint
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1990 assert(SafepointSynchronize::is_at_safepoint(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1991 "world should be stopped");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1992 G1CollectedHeap* g1h = G1CollectedHeap::heap();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1993
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1994 // If a full collection has happened, we shouldn't do this.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1995 if (has_aborted()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1996 g1h->set_marking_complete(); // So bitmap clearing isn't confused
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1997 return;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1998 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1999
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2000 g1h->verify_region_sets_optional();
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2001
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	2002 if (VerifyDuringGC) {
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	2003 HandleMark hm; // handle scope
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	2004 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	2005 Universe::verify(VerifyOption_G1UsePrevMarking,
b06ac540229e 8013132: Add a flag to turn off the output of the verbose verification code stefank parents: 9076 diff changeset	2006 " VerifyDuringGC:(before)");
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	2007 }
20291 e0954897238a 7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS brutisso parents: 20282 diff changeset	2008 g1h->check_bitmaps("Cleanup Start");
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	2009
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2010 G1CollectorPolicy* g1p = G1CollectedHeap::heap()->g1_policy();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2011 g1p->record_concurrent_mark_cleanup_start();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2012
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2013 double start = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2014
2173 97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	2015 HeapRegionRemSet::reset_for_cleanup_tasks();
97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	2016
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	2017 uint n_workers;
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2018
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2019 // 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	2020 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	2021
1833 8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1719 diff changeset	2022 if (G1CollectedHeap::use_parallel_gc_threads()) {
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2023 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	2024 "sanity check");
0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 343 diff changeset	2025
4711 adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	2026 g1h->set_par_threads();
adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	2027 n_workers = g1h->n_par_threads();
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	2028 assert(g1h->n_par_threads() == n_workers,
4711 adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	2029 "Should not have been reset");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2030 g1h->workers()->run_task(&g1_par_count_task);
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2031 // Done with the parallel phase so reset to 0.
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2032 g1h->set_par_threads(0);
355 0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 343 diff changeset	2033
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2034 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	2035 "sanity check");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2036 } else {
4711 adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	2037 n_workers = 1;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2038 g1_par_count_task.work(0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2039 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2040
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2041 if (VerifyDuringGC) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2042 // Verify that the counting data accumulated during marking matches
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2043 // that calculated by walking the marking bitmap.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2044
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2045 // Bitmaps to hold expected values
20263 4dfab3faf5e7 8037958: ConcurrentMark::cleanup leaks BitMaps if VerifyDuringGC is enabled mgerdin parents: 20221 diff changeset	2046 BitMap expected_region_bm(_region_bm.size(), true);
4dfab3faf5e7 8037958: ConcurrentMark::cleanup leaks BitMaps if VerifyDuringGC is enabled mgerdin parents: 20221 diff changeset	2047 BitMap expected_card_bm(_card_bm.size(), true);
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2048
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2049 G1ParVerifyFinalCountTask g1_par_verify_task(g1h,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2050 &_region_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2051 &_card_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2052 &expected_region_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2053 &expected_card_bm);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2054
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2055 if (G1CollectedHeap::use_parallel_gc_threads()) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2056 g1h->set_par_threads((int)n_workers);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2057 g1h->workers()->run_task(&g1_par_verify_task);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2058 // Done with the parallel phase so reset to 0.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2059 g1h->set_par_threads(0);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2060
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2061 assert(g1h->check_heap_region_claim_values(HeapRegion::VerifyCountClaimValue),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2062 "sanity check");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2063 } else {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2064 g1_par_verify_task.work(0);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2065 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2066
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2067 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	2068 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	2069
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2070 size_t start_used_bytes = g1h->used();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2071 g1h->set_marking_complete();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2072
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2073 double count_end = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2074 double this_final_counting_time = (count_end - start);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2075 _total_counting_time += this_final_counting_time;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2076
2435 371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	2077 if (G1PrintRegionLivenessInfo) {
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	2078 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	2079 _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	2080 }
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	2081
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2082 // Install newly created mark bitMap as "prev".
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2083 swapMarkBitMaps();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2084
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2085 g1h->reset_gc_time_stamp();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2086
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2087 // Note end of marking in all heap regions.
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2088 G1ParNoteEndTask g1_par_note_end_task(g1h, &_cleanup_list);
1833 8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1719 diff changeset	2089 if (G1CollectedHeap::use_parallel_gc_threads()) {
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2090 g1h->set_par_threads((int)n_workers);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2091 g1h->workers()->run_task(&g1_par_note_end_task);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2092 g1h->set_par_threads(0);
355 0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 343 diff changeset	2093
0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 343 diff changeset	2094 assert(g1h->check_heap_region_claim_values(HeapRegion::NoteEndClaimValue),
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_note_end_task.work(0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2098 }
6254 a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	2099 g1h->check_gc_time_stamps();
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2100
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2101 if (!cleanup_list_is_empty()) {
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2102 // 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	2103 // concurrently. Notify anyone else that might be wanting free
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2104 // regions that there will be more free regions coming soon.
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2105 g1h->set_free_regions_coming();
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2106 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2107
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2108 // 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	2109 // regions.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2110 if (G1ScrubRemSets) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2111 double rs_scrub_start = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2112 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	2113 if (G1CollectedHeap::use_parallel_gc_threads()) {
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2114 g1h->set_par_threads((int)n_workers);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2115 g1h->workers()->run_task(&g1_par_scrub_rs_task);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2116 g1h->set_par_threads(0);
355 0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 343 diff changeset	2117
0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 343 diff changeset	2118 assert(g1h->check_heap_region_claim_values(
0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 343 diff changeset	2119 HeapRegion::ScrubRemSetClaimValue),
0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 343 diff changeset	2120 "sanity check");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2121 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2122 g1_par_scrub_rs_task.work(0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2123 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2124
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2125 double rs_scrub_end = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2126 double this_rs_scrub_time = (rs_scrub_end - rs_scrub_start);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2127 _total_rs_scrub_time += this_rs_scrub_time;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2128 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2129
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2130 // this will also free any regions totally full of garbage objects,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2131 // and sort the regions.
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2132 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	2133
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2134 // Statistics.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2135 double end = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2136 _cleanup_times.add((end - start) * 1000.0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2137
6007 5c86f8211d1e 7160728: Introduce an extra logging level for G1 logging brutisso parents: 5988 diff changeset	2138 if (G1Log::fine()) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2139 g1h->print_size_transition(gclog_or_tty,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2140 start_used_bytes,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2141 g1h->used(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2142 g1h->capacity());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2143 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2144
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2145 // Clean up will have freed any regions completely full of garbage.
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2146 // Update the soft reference policy with the new heap occupancy.
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2147 Universe::update_heap_info_at_gc();
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2148
751 20c6f43950b5 6490395: G1: Tidy up command line flags. johnc parents: 647 diff changeset	2149 if (VerifyDuringGC) {
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	2150 HandleMark hm; // handle scope
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	2151 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	2152 Universe::verify(VerifyOption_G1UsePrevMarking,
b06ac540229e 8013132: Add a flag to turn off the output of the verbose verification code stefank parents: 9076 diff changeset	2153 " VerifyDuringGC:(after)");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2154 }
20291 e0954897238a 7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS brutisso parents: 20282 diff changeset	2155 g1h->check_bitmaps("Cleanup End");
2152 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 g1h->verify_region_sets_optional();
20278 2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2158
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2159 // We need to make this be a "collection" so any collection pause that
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2160 // races with it goes around and waits for completeCleanup to finish.
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2161 g1h->increment_total_collections();
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2162
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2163 // Clean out dead classes and update Metaspace sizes.
20282 f3aeae1f9fc5 8048269: Add flag to turn off class unloading after G1 concurrent mark stefank parents: 20278 diff changeset	2164 if (ClassUnloadingWithConcurrentMark) {
f3aeae1f9fc5 8048269: Add flag to turn off class unloading after G1 concurrent mark stefank parents: 20278 diff changeset	2165 ClassLoaderDataGraph::purge();
f3aeae1f9fc5 8048269: Add flag to turn off class unloading after G1 concurrent mark stefank parents: 20278 diff changeset	2166 }
20278 2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2167 MetaspaceGC::compute_new_size();
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2168
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2169 // We reclaimed old regions so we should calculate the sizes to make
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2170 // sure we update the old gen/space data.
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2171 g1h->g1mm()->update_sizes();
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2172
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	2173 g1h->trace_heap_after_concurrent_cycle();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2174 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2175
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2176 void ConcurrentMark::completeCleanup() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2177 if (has_aborted()) return;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2178
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2179 G1CollectedHeap* g1h = G1CollectedHeap::heap();
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2180
17841 14bd75c9dbfa 8039089: List verification enabled in product builds jwilhelm parents: 17773 diff changeset	2181 _cleanup_list.verify_optional();
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2177 diff changeset	2182 FreeRegionList tmp_free_list("Tmp Free List");
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2183
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2184 if (G1ConcRegionFreeingVerbose) {
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2185 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	2186 "cleanup list has %u entries",
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2187 _cleanup_list.length());
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2188 }
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2189
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2190 // Noone else should be accessing the _cleanup_list at this point,
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2191 // so it's not necessary to take any locks
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2192 while (!_cleanup_list.is_empty()) {
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2193 HeapRegion* hr = _cleanup_list.remove_head();
17773 8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17750 diff changeset	2194 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	2195 hr->par_clear();
17773 8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17750 diff changeset	2196 tmp_free_list.add_ordered(hr);
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2197
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2198 // 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	2199 // 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	2200 // 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	2201 // 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	2202 // _cleanup_list is empty (which means we just removed the last
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2203 // region from the _cleanup_list).
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2177 diff changeset	2204 if ((tmp_free_list.length() % G1SecondaryFreeListAppendLength == 0) \|\|
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2205 _cleanup_list.is_empty()) {
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2206 if (G1ConcRegionFreeingVerbose) {
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2207 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	2208 "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	2209 "cleanup list still has %u entries",
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2177 diff changeset	2210 tmp_free_list.length(),
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2211 _cleanup_list.length());
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2212 }
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2213
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2214 {
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2215 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	2216 g1h->secondary_free_list_add(&tmp_free_list);
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2217 SecondaryFreeList_lock->notify_all();
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2218 }
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2219
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2220 if (G1StressConcRegionFreeing) {
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2221 for (uintx i = 0; i < G1StressConcRegionFreeingDelayMillis; ++i) {
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2222 os::sleep(Thread::current(), (jlong) 1, false);
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2223 }
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	2224 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2225 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2226 }
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2177 diff changeset	2227 assert(tmp_free_list.is_empty(), "post-condition");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2228 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2229
8014 f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2230 // Supporting Object and Oop closures for reference discovery
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2231 // and processing in during marking
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2232
2037 b03260081e9b 7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field johnc parents: 1974 diff changeset	2233 bool G1CMIsAliveClosure::do_object_b(oop obj) {
b03260081e9b 7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field johnc parents: 1974 diff changeset	2234 HeapWord* addr = (HeapWord*)obj;
b03260081e9b 7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field johnc parents: 1974 diff changeset	2235 return addr != NULL &&
b03260081e9b 7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field johnc parents: 1974 diff changeset	2236 (!_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	2237 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2238
8014 f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2239 // '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	2240 // 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	2241 // 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	2242 // trace referent objects.
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2243 //
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2244 // 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	2245 // 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	2246 // 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	2247 // 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	2248 // 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	2249 // operating on the global stack.
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2250
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2251 class G1CMKeepAliveAndDrainClosure: public OopClosure {
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2252 ConcurrentMark* _cm;
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2253 CMTask* _task;
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2254 int _ref_counter_limit;
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2255 int _ref_counter;
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2256 bool _is_serial;
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2257 public:
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2258 G1CMKeepAliveAndDrainClosure(ConcurrentMark* cm, CMTask* task, bool is_serial) :
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2259 _cm(cm), _task(task), _is_serial(is_serial),
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2260 _ref_counter_limit(G1RefProcDrainInterval) {
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2261 assert(_ref_counter_limit > 0, "sanity");
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2262 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	2263 _ref_counter = _ref_counter_limit;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2264 }
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2265
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2266 virtual void do_oop(narrowOop* p) { do_oop_work(p); }
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2267 virtual void do_oop( oop* p) { do_oop_work(p); }
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2268
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2269 template <class T> void do_oop_work(T* p) {
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2270 if (!_cm->has_overflown()) {
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2271 oop obj = oopDesc::load_decode_heap_oop(p);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	2272 if (_cm->verbose_high()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	2273 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	2274 "*"PTR_FORMAT" = "PTR_FORMAT,
17937 78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang drchase parents: 17844 diff changeset	2275 _task->worker_id(), p2i(p), p2i((void*) obj));
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 _task->deal_with_reference(obj);
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2279 _ref_counter--;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2280
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2281 if (_ref_counter == 0) {
8014 f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2282 // 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	2283 // 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	2284 // 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	2285 // process these entries.
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2286 //
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2287 // 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	2288 // 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	2289 // 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	2290 // above) or we overflow.
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2291 //
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2292 // 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	2293 // 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	2294 // 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	2295 // 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	2296 // 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	2297 // has_aborted() flag that the marking step has completed.
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2298 do {
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2299 double mark_step_duration_ms = G1ConcMarkStepDurationMillis;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2300 _task->do_marking_step(mark_step_duration_ms,
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2301 false /* do_termination */,
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2302 _is_serial);
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2303 } while (_task->has_aborted() && !_cm->has_overflown());
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2304 _ref_counter = _ref_counter_limit;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2305 }
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2306 } else {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	2307 if (_cm->verbose_high()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	2308 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	2309 }
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2310 }
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2311 }
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2312 };
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2313
8014 f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2314 // '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	2315 // 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	2316 // 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	2317 // 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	2318 // 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	2319 // added by the 'keep alive' oop closure above.
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2320
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2321 class G1CMDrainMarkingStackClosure: public VoidClosure {
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2322 ConcurrentMark* _cm;
8014 f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2323 CMTask* _task;
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2324 bool _is_serial;
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2325 public:
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2326 G1CMDrainMarkingStackClosure(ConcurrentMark* cm, CMTask* task, bool is_serial) :
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2327 _cm(cm), _task(task), _is_serial(is_serial) {
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2328 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	2329 }
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2330
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2331 void do_void() {
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2332 do {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	2333 if (_cm->verbose_high()) {
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2334 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	2335 _task->worker_id(), BOOL_TO_STR(_is_serial));
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	2336 }
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2337
8014 f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2338 // 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	2339 // 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	2340 // oop closure (an instance of G1CMKeepAliveAndDrainClosure above).
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2341 //
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2342 // 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	2343 // 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	2344 // 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	2345 // 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	2346 // the global marking stack.
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2347 //
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2348 // 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	2349 // 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	2350 // 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	2351 // 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	2352 // 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	2353 // has_aborted() flag that the marking step has completed.
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2354
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2355 _task->do_marking_step(1000000000.0 /* something very large */,
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2356 true /* do_termination */,
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2357 _is_serial);
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2358 } while (_task->has_aborted() && !_cm->has_overflown());
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2359 }
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2360 };
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2361
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2362 // Implementation of AbstractRefProcTaskExecutor for parallel
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2363 // reference processing at the end of G1 concurrent marking
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2364
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2365 class G1CMRefProcTaskExecutor: public AbstractRefProcTaskExecutor {
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2366 private:
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2367 G1CollectedHeap* _g1h;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2368 ConcurrentMark* _cm;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2369 WorkGang* _workers;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2370 int _active_workers;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2371
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2372 public:
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2373 G1CMRefProcTaskExecutor(G1CollectedHeap* g1h,
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2374 ConcurrentMark* cm,
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2375 WorkGang* workers,
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2376 int n_workers) :
4093 6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	2377 _g1h(g1h), _cm(cm),
6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	2378 _workers(workers), _active_workers(n_workers) { }
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2379
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2380 // Executes the given task using concurrent marking worker threads.
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2381 virtual void execute(ProcessTask& task);
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2382 virtual void execute(EnqueueTask& task);
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2383 };
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2384
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2385 class G1CMRefProcTaskProxy: public AbstractGangTask {
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2386 typedef AbstractRefProcTaskExecutor::ProcessTask ProcessTask;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2387 ProcessTask& _proc_task;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2388 G1CollectedHeap* _g1h;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2389 ConcurrentMark* _cm;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2390
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2391 public:
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2392 G1CMRefProcTaskProxy(ProcessTask& proc_task,
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2393 G1CollectedHeap* g1h,
4093 6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	2394 ConcurrentMark* cm) :
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2395 AbstractGangTask("Process reference objects in parallel"),
8014 f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2396 _proc_task(proc_task), _g1h(g1h), _cm(cm) {
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2397 ReferenceProcessor* rp = _g1h->ref_processor_cm();
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2398 assert(rp->processing_is_mt(), "shouldn't be here otherwise");
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2399 }
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2400
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	2401 virtual void work(uint worker_id) {
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2402 CMTask* task = _cm->task(worker_id);
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2403 G1CMIsAliveClosure g1_is_alive(_g1h);
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2404 G1CMKeepAliveAndDrainClosure g1_par_keep_alive(_cm, task, false /* is_serial */);
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2405 G1CMDrainMarkingStackClosure g1_par_drain(_cm, task, false /* is_serial */);
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2406
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	2407 _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	2408 }
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2409 };
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2410
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2411 void G1CMRefProcTaskExecutor::execute(ProcessTask& proc_task) {
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2412 assert(_workers != NULL, "Need parallel worker threads.");
8014 f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2413 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	2414
4093 6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	2415 G1CMRefProcTaskProxy proc_task_proxy(proc_task, _g1h, _cm);
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2416
8788 e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2417 // 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	2418 // proxy task execution, so that the termination protocol
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2419 // 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	2420 // how many workers to wait for.
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2421 _cm->set_concurrency(_active_workers);
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2422 _g1h->set_par_threads(_active_workers);
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2423 _workers->run_task(&proc_task_proxy);
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2424 _g1h->set_par_threads(0);
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2425 }
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2426
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2427 class G1CMRefEnqueueTaskProxy: public AbstractGangTask {
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2428 typedef AbstractRefProcTaskExecutor::EnqueueTask EnqueueTask;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2429 EnqueueTask& _enq_task;
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2430
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2431 public:
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2432 G1CMRefEnqueueTaskProxy(EnqueueTask& enq_task) :
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2433 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	2434 _enq_task(enq_task) { }
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2435
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	2436 virtual void work(uint worker_id) {
441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	2437 _enq_task.work(worker_id);
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2438 }
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2439 };
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2440
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2441 void G1CMRefProcTaskExecutor::execute(EnqueueTask& enq_task) {
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2442 assert(_workers != NULL, "Need parallel worker threads.");
8014 f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2443 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	2444
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2445 G1CMRefEnqueueTaskProxy enq_task_proxy(enq_task);
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2446
8788 e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2447 // Not strictly necessary but...
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2448 //
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2449 // 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	2450 // proxy task execution, so that the termination protocol
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2451 // 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	2452 // how many workers to wait for.
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2453 _cm->set_concurrency(_active_workers);
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2454 _g1h->set_par_threads(_active_workers);
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2455 _workers->run_task(&enq_task_proxy);
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2456 _g1h->set_par_threads(0);
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2457 }
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2458
20278 2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2459 void ConcurrentMark::weakRefsWorkParallelPart(BoolObjectClosure* is_alive, bool purged_classes) {
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2460 G1CollectedHeap::heap()->parallel_cleaning(is_alive, true, true, purged_classes);
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2461 }
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2462
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2463 // Helper class to get rid of some boilerplate code.
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2464 class G1RemarkGCTraceTime : public GCTraceTime {
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2465 static bool doit_and_prepend(bool doit) {
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2466 if (doit) {
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2467 gclog_or_tty->put(' ');
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2468 }
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2469 return doit;
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2470 }
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2471
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2472 public:
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2473 G1RemarkGCTraceTime(const char* title, bool doit)
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2474 : GCTraceTime(title, doit_and_prepend(doit), false, G1CollectedHeap::heap()->gc_timer_cm(),
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2475 G1CollectedHeap::heap()->concurrent_mark()->concurrent_gc_id()) {
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2476 }
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2477 };
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2478
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2479 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	2480 if (has_overflown()) {
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2481 // Skip processing the discovered references if we have
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2482 // overflown the global marking stack. Reference objects
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2483 // 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	2484 // 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	2485 // 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	2486 // less reference objects are discovered.
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2487 return;
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2488 }
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2489
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2490 ResourceMark rm;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2491 HandleMark hm;
3975 1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2492
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2493 G1CollectedHeap* g1h = G1CollectedHeap::heap();
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2494
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2495 // Is alive closure.
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2496 G1CMIsAliveClosure g1_is_alive(g1h);
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2497
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2498 // 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	2499 // tables from the displayed time.
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2500 {
6007 5c86f8211d1e 7160728: Introduce an extra logging level for G1 logging brutisso parents: 5988 diff changeset	2501 if (G1Log::finer()) {
3975 1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2502 gclog_or_tty->put(' ');
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2503 }
20190 0982ec23da03 8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps brutisso parents: 17950 diff changeset	2504 GCTraceTime t("GC ref-proc", G1Log::finer(), false, g1h->gc_timer_cm(), concurrent_gc_id());
3975 1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2505
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2506 ReferenceProcessor* rp = g1h->ref_processor_cm();
3975 1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2507
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2508 // See the comment in G1CollectedHeap::ref_processing_init()
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2509 // about how reference processing currently works in G1.
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2510
8014 f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2511 // Set the soft reference policy
3975 1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2512 rp->setup_policy(clear_all_soft_refs);
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2513 assert(_markStack.isEmpty(), "mark stack should be empty");
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2514
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2515 // Instances of the 'Keep Alive' and 'Complete GC' closures used
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2516 // in serial reference processing. Note these closures are also
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2517 // used for serially processing (by the the current thread) the
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2518 // JNI references during parallel reference processing.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2519 //
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2520 // These closures do not need to synchronize with the worker
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2521 // threads involved in parallel reference processing as these
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2522 // instances are executed serially by the current thread (e.g.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2523 // reference processing is not multi-threaded and is thus
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2524 // performed by the current thread instead of a gang worker).
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2525 //
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2526 // The gang tasks involved in parallel reference procssing create
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2527 // their own instances of these closures, which do their own
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2528 // synchronization among themselves.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2529 G1CMKeepAliveAndDrainClosure g1_keep_alive(this, task(0), true /* is_serial */);
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2530 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	2531
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2532 // We need at least one active thread. If reference processing
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2533 // is not multi-threaded we use the current (VMThread) thread,
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2534 // otherwise we use the work gang from the G1CollectedHeap and
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2535 // we utilize all the worker threads we can.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2536 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	2537 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	2538 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	2539
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2540 // Parallel processing task executor.
4093 6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965 johnc parents: 4072 diff changeset	2541 G1CMRefProcTaskExecutor par_task_executor(g1h, this,
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2542 g1h->workers(), active_workers);
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2543 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	2544
8788 e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2545 // 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	2546 // executing the remark task.
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2547 set_concurrency(active_workers);
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2548
8014 f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2549 // 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	2550 // 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	2551 // 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	2552 // 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	2553 rp->set_active_mt_degree(active_workers);
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2554
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2555 // Process the weak references.
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	2556 const ReferenceProcessorStats& stats =
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	2557 rp->process_discovered_references(&g1_is_alive,
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	2558 &g1_keep_alive,
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	2559 &g1_drain_mark_stack,
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	2560 executor,
20190 0982ec23da03 8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps brutisso parents: 17950 diff changeset	2561 g1h->gc_timer_cm(),
0982ec23da03 8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps brutisso parents: 17950 diff changeset	2562 concurrent_gc_id());
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	2563 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	2564
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2565 // 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	2566 // 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	2567 // global marking stack.
3975 1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2568
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2569 assert(_markStack.overflow() \|\| _markStack.isEmpty(),
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2570 "mark stack should be empty (unless it overflowed)");
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2571
3975 1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2572 if (_markStack.overflow()) {
8014 f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2573 // 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	2574 // 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	2575 set_has_overflown();
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2576 }
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2577
8014 f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2578 assert(rp->num_q() == active_workers, "why not");
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2579
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking johnc parents: 8008 diff changeset	2580 rp->enqueue_discovered_references(executor);
3975 1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2581
1847b501ae74 7068215: G1: Print reference processing time during remark johnc parents: 3914 diff changeset	2582 rp->verify_no_references_recorded();
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	2583 assert(!rp->discovery_enabled(), "Post condition");
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2584 }
234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2585
17750 f53edbc2b728 8036673: G1: Abort weak reference processing if mark stack overflows pliden parents: 17736 diff changeset	2586 if (has_overflown()) {
f53edbc2b728 8036673: G1: Abort weak reference processing if mark stack overflows pliden parents: 17736 diff changeset	2587 // 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	2588 return;
f53edbc2b728 8036673: G1: Abort weak reference processing if mark stack overflows pliden parents: 17736 diff changeset	2589 }
f53edbc2b728 8036673: G1: Abort weak reference processing if mark stack overflows pliden parents: 17736 diff changeset	2590
20278 2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2591 assert(_markStack.isEmpty(), "Marking should have completed");
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2592
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2593 // Unload Klasses, String, Symbols, Code Cache, etc.
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2594 {
20282 f3aeae1f9fc5 8048269: Add flag to turn off class unloading after G1 concurrent mark stefank parents: 20278 diff changeset	2595 G1RemarkGCTraceTime trace("Unloading", G1Log::finer());
f3aeae1f9fc5 8048269: Add flag to turn off class unloading after G1 concurrent mark stefank parents: 20278 diff changeset	2596
f3aeae1f9fc5 8048269: Add flag to turn off class unloading after G1 concurrent mark stefank parents: 20278 diff changeset	2597 if (ClassUnloadingWithConcurrentMark) {
f3aeae1f9fc5 8048269: Add flag to turn off class unloading after G1 concurrent mark stefank parents: 20278 diff changeset	2598 bool purged_classes;
f3aeae1f9fc5 8048269: Add flag to turn off class unloading after G1 concurrent mark stefank parents: 20278 diff changeset	2599
f3aeae1f9fc5 8048269: Add flag to turn off class unloading after G1 concurrent mark stefank parents: 20278 diff changeset	2600 {
f3aeae1f9fc5 8048269: Add flag to turn off class unloading after G1 concurrent mark stefank parents: 20278 diff changeset	2601 G1RemarkGCTraceTime trace("System Dictionary Unloading", G1Log::finest());
f3aeae1f9fc5 8048269: Add flag to turn off class unloading after G1 concurrent mark stefank parents: 20278 diff changeset	2602 purged_classes = SystemDictionary::do_unloading(&g1_is_alive);
f3aeae1f9fc5 8048269: Add flag to turn off class unloading after G1 concurrent mark stefank parents: 20278 diff changeset	2603 }
f3aeae1f9fc5 8048269: Add flag to turn off class unloading after G1 concurrent mark stefank parents: 20278 diff changeset	2604
f3aeae1f9fc5 8048269: Add flag to turn off class unloading after G1 concurrent mark stefank parents: 20278 diff changeset	2605 {
f3aeae1f9fc5 8048269: Add flag to turn off class unloading after G1 concurrent mark stefank parents: 20278 diff changeset	2606 G1RemarkGCTraceTime trace("Parallel Unloading", G1Log::finest());
f3aeae1f9fc5 8048269: Add flag to turn off class unloading after G1 concurrent mark stefank parents: 20278 diff changeset	2607 weakRefsWorkParallelPart(&g1_is_alive, purged_classes);
f3aeae1f9fc5 8048269: Add flag to turn off class unloading after G1 concurrent mark stefank parents: 20278 diff changeset	2608 }
f3aeae1f9fc5 8048269: Add flag to turn off class unloading after G1 concurrent mark stefank parents: 20278 diff changeset	2609 }
f3aeae1f9fc5 8048269: Add flag to turn off class unloading after G1 concurrent mark stefank parents: 20278 diff changeset	2610
f3aeae1f9fc5 8048269: Add flag to turn off class unloading after G1 concurrent mark stefank parents: 20278 diff changeset	2611 if (G1StringDedup::is_enabled()) {
f3aeae1f9fc5 8048269: Add flag to turn off class unloading after G1 concurrent mark stefank parents: 20278 diff changeset	2612 G1RemarkGCTraceTime trace("String Deduplication Unlink", G1Log::finest());
f3aeae1f9fc5 8048269: Add flag to turn off class unloading after G1 concurrent mark stefank parents: 20278 diff changeset	2613 G1StringDedup::unlink(&g1_is_alive);
f3aeae1f9fc5 8048269: Add flag to turn off class unloading after G1 concurrent mark stefank parents: 20278 diff changeset	2614 }
20278 2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2615 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2616 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2617
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2618 void ConcurrentMark::swapMarkBitMaps() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2619 CMBitMapRO* temp = _prevMarkBitMap;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2620 _prevMarkBitMap = (CMBitMapRO*)_nextMarkBitMap;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2621 _nextMarkBitMap = (CMBitMap*) temp;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2622 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2623
20278 2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2624 class CMObjectClosure;
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2625
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2626 // Closure for iterating over objects, currently only used for
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2627 // processing SATB buffers.
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2628 class CMObjectClosure : public ObjectClosure {
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2629 private:
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2630 CMTask* _task;
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2631
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2632 public:
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2633 void do_object(oop obj) {
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2634 _task->deal_with_reference(obj);
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2635 }
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2636
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2637 CMObjectClosure(CMTask* task) : _task(task) { }
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2638 };
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2639
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2640 class G1RemarkThreadsClosure : public ThreadClosure {
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2641 CMObjectClosure _cm_obj;
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2642 G1CMOopClosure _cm_cl;
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2643 MarkingCodeBlobClosure _code_cl;
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2644 int _thread_parity;
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2645 bool _is_par;
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2646
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2647 public:
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2648 G1RemarkThreadsClosure(G1CollectedHeap* g1h, CMTask* task, bool is_par) :
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2649 _cm_obj(task), _cm_cl(g1h, g1h->concurrent_mark(), task), _code_cl(&_cm_cl, !CodeBlobToOopClosure::FixRelocations),
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2650 _thread_parity(SharedHeap::heap()->strong_roots_parity()), _is_par(is_par) {}
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2651
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2652 void do_thread(Thread* thread) {
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2653 if (thread->is_Java_thread()) {
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2654 if (thread->claim_oops_do(_is_par, _thread_parity)) {
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2655 JavaThread* jt = (JavaThread*)thread;
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2656
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2657 // In theory it should not be neccessary to explicitly walk the nmethods to find roots for concurrent marking
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2658 // however the liveness of oops reachable from nmethods have very complex lifecycles:
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2659 // * Alive if on the stack of an executing method
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2660 // * Weakly reachable otherwise
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2661 // Some objects reachable from nmethods, such as the class loader (or klass_holder) of the receiver should be
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2662 // live by the SATB invariant but other oops recorded in nmethods may behave differently.
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2663 jt->nmethods_do(&_code_cl);
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2664
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2665 jt->satb_mark_queue().apply_closure_and_empty(&_cm_obj);
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2666 }
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2667 } else if (thread->is_VM_thread()) {
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2668 if (thread->claim_oops_do(_is_par, _thread_parity)) {
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2669 JavaThread::satb_mark_queue_set().shared_satb_queue()->apply_closure_and_empty(&_cm_obj);
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2670 }
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2671 }
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2672 }
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2673 };
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2674
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2675 class CMRemarkTask: public AbstractGangTask {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2676 private:
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2677 ConcurrentMark* _cm;
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2678 bool _is_serial;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2679 public:
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	2680 void work(uint worker_id) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2681 // Since all available tasks are actually started, we should
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2682 // 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	2683 if (worker_id < _cm->active_tasks()) {
441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	2684 CMTask* task = _cm->task(worker_id);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2685 task->record_start_time();
20278 2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2686 {
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2687 ResourceMark rm;
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2688 HandleMark hm;
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2689
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2690 G1RemarkThreadsClosure threads_f(G1CollectedHeap::heap(), task, !_is_serial);
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2691 Threads::threads_do(&threads_f);
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2692 }
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2693
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2694 do {
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	2695 task->do_marking_step(1000000000.0 /* something very large */,
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2696 true /* do_termination */,
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2697 _is_serial);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2698 } while (task->has_aborted() && !_cm->has_overflown());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2699 // 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	2700 // want to abort remark and do concurrent marking again.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2701 task->record_end_time();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2702 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2703 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2704
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2705 CMRemarkTask(ConcurrentMark* cm, int active_workers, bool is_serial) :
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2706 AbstractGangTask("Par Remark"), _cm(cm), _is_serial(is_serial) {
4711 adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken johnc parents: 4097 diff changeset	2707 _cm->terminator()->reset_for_reuse(active_workers);
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2708 }
342 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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2711 void ConcurrentMark::checkpointRootsFinalWork() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2712 ResourceMark rm;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2713 HandleMark hm;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2714 G1CollectedHeap* g1h = G1CollectedHeap::heap();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2715
20278 2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2716 G1RemarkGCTraceTime trace("Finalize Marking", G1Log::finer());
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20263 diff changeset	2717
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2718 g1h->ensure_parsability(false);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2719
1833 8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1719 diff changeset	2720 if (G1CollectedHeap::use_parallel_gc_threads()) {
989 148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 912 diff changeset	2721 G1CollectedHeap::StrongRootsScope srs(g1h);
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2722 // 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	2723 uint active_workers = g1h->workers()->active_workers();
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2724 if (active_workers == 0) {
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2725 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	2726 active_workers = (uint) ParallelGCThreads;
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2727 g1h->workers()->set_active_workers(active_workers);
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2728 }
8788 e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2729 set_concurrency_and_phase(active_workers, false /* concurrent */);
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2730 // Leave _parallel_marking_threads at it's
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2731 // value originally calculated in the ConcurrentMark
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2732 // constructor and pass values of the active workers
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2733 // through the gang in the task.
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2734
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2735 CMRemarkTask remarkTask(this, active_workers, false /* is_serial */);
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2736 // 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	2737 // 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	2738 // immediately.
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4093 diff changeset	2739 g1h->set_par_threads(active_workers);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2740 g1h->workers()->run_task(&remarkTask);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2741 g1h->set_par_threads(0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2742 } else {
989 148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 912 diff changeset	2743 G1CollectedHeap::StrongRootsScope srs(g1h);
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	2744 uint active_workers = 1;
8788 e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	2745 set_concurrency_and_phase(active_workers, false /* concurrent */);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2746
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2747 // 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	2748 // the thread to execute the remark - serially. We have
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2749 // to pass true for the is_serial parameter so that
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2750 // CMTask::do_marking_step() doesn't enter the sync
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2751 // barriers in the event of an overflow. Doing so will
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2752 // cause an assert that the current thread is not a
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2753 // concurrent GC thread.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	2754 CMRemarkTask remarkTask(this, active_workers, true /* is_serial*/);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2755 remarkTask.work(0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2756 }
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	2757 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	2758 guarantee(has_overflown() \|\|
1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure johnc parents: 8788 diff changeset	2759 satb_mq_set.completed_buffers_num() == 0,
1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure johnc parents: 8788 diff changeset	2760 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	2761 BOOL_TO_STR(has_overflown()),
1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure johnc parents: 8788 diff changeset	2762 satb_mq_set.completed_buffers_num()));
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2763
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2764 print_stats();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2765 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2766
1044 6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2767 #ifndef PRODUCT
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2768
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2769 class PrintReachableOopClosure: public OopClosure {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2770 private:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2771 G1CollectedHeap* _g1h;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2772 outputStream* _out;
3772 6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2773 VerifyOption _vo;
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2774 bool _all;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2775
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2776 public:
3772 6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2777 PrintReachableOopClosure(outputStream* out,
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2778 VerifyOption vo,
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2779 bool all) :
1044 6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2780 _g1h(G1CollectedHeap::heap()),
3772 6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2781 _out(out), _vo(vo), _all(all) { }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2782
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	2783 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	2784 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	2785
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 831 diff changeset	2786 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	2787 oop obj = oopDesc::load_decode_heap_oop(p);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2788 const char* str = NULL;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2789 const char* str2 = "";
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2790
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2791 if (obj == NULL) {
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2792 str = "";
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2793 } else if (!_g1h->is_in_g1_reserved(obj)) {
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2794 str = " O";
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2795 } else {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2796 HeapRegion* hr = _g1h->heap_region_containing(obj);
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	2797 guarantee(hr != NULL, "invariant");
6254 a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	2798 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	2799 bool marked = _g1h->is_marked(obj, _vo);
1044 6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2800
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2801 if (over_tams) {
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2802 str = " >";
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2803 if (marked) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2804 str2 = " AND MARKED";
1044 6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2805 }
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2806 } else if (marked) {
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2807 str = " M";
1044 6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2808 } else {
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2809 str = " NOT";
1044 6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2810 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2811 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2812
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2813 _out->print_cr(" "PTR_FORMAT": "PTR_FORMAT"%s%s",
17937 78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang drchase parents: 17844 diff changeset	2814 p2i(p), p2i((void*) obj), str, str2);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2815 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2816 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2817
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2818 class PrintReachableObjectClosure : public ObjectClosure {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2819 private:
3772 6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2820 G1CollectedHeap* _g1h;
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2821 outputStream* _out;
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2822 VerifyOption _vo;
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2823 bool _all;
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2824 HeapRegion* _hr;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2825
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2826 public:
3772 6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2827 PrintReachableObjectClosure(outputStream* out,
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2828 VerifyOption vo,
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2829 bool all,
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2830 HeapRegion* hr) :
3772 6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2831 _g1h(G1CollectedHeap::heap()),
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2832 _out(out), _vo(vo), _all(all), _hr(hr) { }
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2833
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2834 void do_object(oop o) {
6254 a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	2835 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	2836 bool marked = _g1h->is_marked(o, _vo);
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2837 bool print_it = _all \|\| over_tams \|\| marked;
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2838
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2839 if (print_it) {
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2840 _out->print_cr(" "PTR_FORMAT"%s",
17937 78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang drchase parents: 17844 diff changeset	2841 p2i((void *)o), (over_tams) ? " >" : (marked) ? " M" : "");
3772 6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2842 PrintReachableOopClosure oopCl(_out, _vo, _all);
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6254 diff changeset	2843 o->oop_iterate_no_header(&oopCl);
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2844 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2845 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2846 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2847
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2848 class PrintReachableRegionClosure : public HeapRegionClosure {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2849 private:
6254 a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	2850 G1CollectedHeap* _g1h;
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	2851 outputStream* _out;
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	2852 VerifyOption _vo;
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	2853 bool _all;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2854
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2855 public:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2856 bool doHeapRegion(HeapRegion* hr) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2857 HeapWord* b = hr->bottom();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2858 HeapWord* e = hr->end();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2859 HeapWord* t = hr->top();
6254 a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	2860 HeapWord* p = _g1h->top_at_mark_start(hr, _vo);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2861 _out->print_cr("** ["PTR_FORMAT", "PTR_FORMAT"] top: "PTR_FORMAT" "
17937 78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang drchase parents: 17844 diff changeset	2862 "TAMS: " PTR_FORMAT, p2i(b), p2i(e), p2i(t), p2i(p));
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2863 _out->cr();
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2864
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2865 HeapWord* from = b;
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2866 HeapWord* to = t;
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2867
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2868 if (to > from) {
17937 78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang drchase parents: 17844 diff changeset	2869 _out->print_cr("Objects in [" PTR_FORMAT ", " PTR_FORMAT "]", p2i(from), p2i(to));
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2870 _out->cr();
3772 6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2871 PrintReachableObjectClosure ocl(_out, _vo, _all, hr);
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2872 hr->object_iterate_mem_careful(MemRegion(from, to), &ocl);
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2873 _out->cr();
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2874 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2875
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2876 return false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2877 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2878
3772 6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2879 PrintReachableRegionClosure(outputStream* out,
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2880 VerifyOption vo,
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2881 bool all) :
6254 a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	2882 _g1h(G1CollectedHeap::heap()), _out(out), _vo(vo), _all(all) { }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2883 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2884
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2885 void ConcurrentMark::print_reachable(const char* str,
3772 6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2886 VerifyOption vo,
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2887 bool all) {
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2888 gclog_or_tty->cr();
7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2889 gclog_or_tty->print_cr("== Doing heap dump... ");
1044 6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2890
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2891 if (G1PrintReachableBaseFile == NULL) {
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2892 gclog_or_tty->print_cr(" #### error: no base file defined");
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2893 return;
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2894 }
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2895
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2896 if (strlen(G1PrintReachableBaseFile) + 1 + strlen(str) >
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2897 (JVM_MAXPATHLEN - 1)) {
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2898 gclog_or_tty->print_cr(" #### error: file name too long");
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2899 return;
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2900 }
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2901
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2902 char file_name[JVM_MAXPATHLEN];
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2903 sprintf(file_name, "%s.%s", G1PrintReachableBaseFile, str);
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2904 gclog_or_tty->print_cr(" dumping to file %s", file_name);
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2905
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2906 fileStream fout(file_name);
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2907 if (!fout.is_open()) {
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2908 gclog_or_tty->print_cr(" #### error: could not open file");
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2909 return;
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2910 }
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2911
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2912 outputStream* out = &fout;
6254 a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6220 diff changeset	2913 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	2914 out->cr();
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2915
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2916 out->print_cr("--- ITERATING OVER REGIONS");
1044 6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2917 out->cr();
3772 6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3771 diff changeset	2918 PrintReachableRegionClosure rcl(out, vo, all);
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2919 _g1h->heap_region_iterate(&rcl);
1044 6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2920 out->cr();
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2921
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2922 gclog_or_tty->print_cr(" done");
1388 7666957bc44d 6937142: G1: improvements to debugging output (S-M) tonyp parents: 1359 diff changeset	2923 gclog_or_tty->flush();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2924 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2925
1044 6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2926 #endif // PRODUCT
6270f80a7331 6890137: G1: revamp reachable object dump tonyp parents: 1030 diff changeset	2927
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2928 void ConcurrentMark::clearRangePrevBitmap(MemRegion mr) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2929 // 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	2930 // the cast.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2931 ((CMBitMap*)_prevMarkBitMap)->clearRange(mr);
4787 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
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2934 void ConcurrentMark::clearRangeNextBitmap(MemRegion mr) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2935 _nextMarkBitMap->clearRange(mr);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2936 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2937
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2938 void ConcurrentMark::clearRangeBothBitmaps(MemRegion mr) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2939 clearRangePrevBitmap(mr);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	2940 clearRangeNextBitmap(mr);
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
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2943 HeapRegion*
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	2944 ConcurrentMark::claim_region(uint worker_id) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2945 // "checkpoint" the finger
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2946 HeapWord* finger = _finger;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2947
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2948 // _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	2949 // yield points.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2950 while (finger < _heap_end) {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	2951 assert(_g1h->is_in_g1_reserved(finger), "invariant");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2952
3771 842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2953 // Note on how this code handles humongous regions. In the
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2954 // normal case the finger will reach the start of a "starts
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2955 // humongous" (SH) region. Its end will either be the end of the
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2956 // last "continues humongous" (CH) region in the sequence, or the
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2957 // 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	2958 // the sequence). That way claim_region() will skip over the CH
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2959 // regions. However, there is a subtle race between a CM thread
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2960 // executing this method and a mutator thread doing a humongous
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2961 // object allocation. The two are not mutually exclusive as the CM
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2962 // thread does not need to hold the Heap_lock when it gets
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2963 // here. So there is a chance that claim_region() will come across
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2964 // 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	2965 // region. In the former case, it will either
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2966 // 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	2967 // visit every subsequent CH region, will find their bitmaps
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2968 // empty, and do nothing, or
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2969 // b) Will observe the update of the region's end (in which case
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2970 // it will skip the subsequent CH regions).
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2971 // If it comes across a region that suddenly becomes CH, the
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2972 // scenario will be similar to b). So, the race between
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2973 // claim_region() and a humongous object allocation might force us
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2974 // to do a bit of unnecessary work (due to some unnecessary bitmap
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2975 // iterations) but it should not introduce and correctness issues.
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2976 HeapRegion* curr_region = _g1h->heap_region_containing_raw(finger);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2977 HeapWord* bottom = curr_region->bottom();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2978 HeapWord* end = curr_region->end();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2979 HeapWord* limit = curr_region->next_top_at_mark_start();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2980
3771 842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2981 if (verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	2982 gclog_or_tty->print_cr("[%u] curr_region = "PTR_FORMAT" "
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2983 "["PTR_FORMAT", "PTR_FORMAT"), "
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2984 "limit = "PTR_FORMAT,
17937 78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang drchase parents: 17844 diff changeset	2985 worker_id, p2i(curr_region), p2i(bottom), p2i(end), p2i(limit));
3771 842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2986 }
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2987
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2988 // Is the gap between reading the finger and doing the CAS too long?
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	2989 HeapWord* res = (HeapWord*) Atomic::cmpxchg_ptr(end, &_finger, finger);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2990 if (res == finger) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2991 // we succeeded
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2992
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2993 // notice that _finger == end cannot be guaranteed here since,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2994 // someone else might have moved the finger even further
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	2995 assert(_finger >= end, "the finger should have moved forward");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2996
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	2997 if (verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	2998 gclog_or_tty->print_cr("[%u] we were successful with region = "
17937 78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang drchase parents: 17844 diff changeset	2999 PTR_FORMAT, worker_id, p2i(curr_region));
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3000 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3001
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3002 if (limit > bottom) {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3003 if (verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3004 gclog_or_tty->print_cr("[%u] region "PTR_FORMAT" is not empty, "
17937 78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang drchase parents: 17844 diff changeset	3005 "returning it ", worker_id, p2i(curr_region));
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3006 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3007 return curr_region;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3008 } else {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3009 assert(limit == bottom,
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3010 "the region limit should be at bottom");
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3011 if (verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3012 gclog_or_tty->print_cr("[%u] region "PTR_FORMAT" is empty, "
17937 78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang drchase parents: 17844 diff changeset	3013 "returning NULL", worker_id, p2i(curr_region));
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3014 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3015 // we return NULL and the caller should try calling
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3016 // claim_region() again.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3017 return NULL;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3018 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3019 } else {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3020 assert(_finger > finger, "the finger should have moved forward");
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3021 if (verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3022 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	3023 "global finger = "PTR_FORMAT", "
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3024 "our finger = "PTR_FORMAT,
17937 78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang drchase parents: 17844 diff changeset	3025 worker_id, p2i(_finger), p2i(finger));
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3026 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3027
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3028 // read it again
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3029 finger = _finger;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3030 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3031 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3032
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3033 return NULL;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3034 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3035
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3036 #ifndef PRODUCT
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3037 enum VerifyNoCSetOopsPhase {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3038 VerifyNoCSetOopsStack,
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3039 VerifyNoCSetOopsQueues,
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3040 VerifyNoCSetOopsSATBCompleted,
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3041 VerifyNoCSetOopsSATBThread
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3042 };
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3043
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3044 class VerifyNoCSetOopsClosure : public OopClosure, public ObjectClosure {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3045 private:
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3046 G1CollectedHeap* _g1h;
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3047 VerifyNoCSetOopsPhase _phase;
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3048 int _info;
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3049
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3050 const char* phase_str() {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3051 switch (_phase) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3052 case VerifyNoCSetOopsStack: return "Stack";
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3053 case VerifyNoCSetOopsQueues: return "Queue";
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3054 case VerifyNoCSetOopsSATBCompleted: return "Completed SATB Buffers";
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3055 case VerifyNoCSetOopsSATBThread: return "Thread SATB Buffers";
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3056 default: ShouldNotReachHere();
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3057 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3058 return NULL;
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3059 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3060
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3061 void do_object_work(oop obj) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3062 guarantee(!_g1h->obj_in_cs(obj),
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3063 err_msg("obj: "PTR_FORMAT" in CSet, phase: %s, info: %d",
17937 78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang drchase parents: 17844 diff changeset	3064 p2i((void*) obj), phase_str(), _info));
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3065 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3066
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3067 public:
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3068 VerifyNoCSetOopsClosure() : _g1h(G1CollectedHeap::heap()) { }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3069
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3070 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	3071 _phase = phase;
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3072 _info = info;
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3073 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3074
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3075 virtual void do_oop(oop* p) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3076 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	3077 do_object_work(obj);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3078 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3079
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3080 virtual void do_oop(narrowOop* p) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3081 // 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	3082 // stacks and SATB buffers.
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3083 ShouldNotReachHere();
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3084 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3085
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3086 virtual void do_object(oop obj) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3087 do_object_work(obj);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3088 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3089 };
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3090
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3091 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	3092 bool verify_enqueued_buffers,
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3093 bool verify_thread_buffers,
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3094 bool verify_fingers) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3095 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	3096 if (!G1CollectedHeap::heap()->mark_in_progress()) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3097 return;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3098 }
1835 4805b9f4779e 6941395: G1: Use only lock-free versions of region stack push() and pop() johnc parents: 1833 diff changeset	3099
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3100 VerifyNoCSetOopsClosure cl;
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3101
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3102 if (verify_stacks) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3103 // Verify entries on the global mark stack
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3104 cl.set_phase(VerifyNoCSetOopsStack);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3105 _markStack.oops_do(&cl);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3106
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3107 // 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	3108 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	3109 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	3110 CMTaskQueue* queue = _task_queues->queue(i);
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3111 queue->oops_do(&cl);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3112 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3113 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3114
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3115 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	3116
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3117 // Verify entries on the enqueued SATB buffers
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3118 if (verify_enqueued_buffers) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3119 cl.set_phase(VerifyNoCSetOopsSATBCompleted);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3120 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	3121 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3122
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3123 // 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	3124 if (verify_thread_buffers) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3125 cl.set_phase(VerifyNoCSetOopsSATBThread);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3126 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	3127 }
4805b9f4779e 6941395: G1: Use only lock-free versions of region stack push() and pop() johnc parents: 1833 diff changeset	3128
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3129 if (verify_fingers) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3130 // Verify the global finger
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3131 HeapWord* global_finger = finger();
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3132 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	3133 // 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	3134 // 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	3135 // 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	3136 // which subsequently becomes continues humongous. If that
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3137 // 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	3138 // 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	3139 // not hold any more.
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3140 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	3141 guarantee(global_finger == global_hr->bottom(),
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3142 err_msg("global finger: "PTR_FORMAT" region: "HR_FORMAT,
17937 78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang drchase parents: 17844 diff changeset	3143 p2i(global_finger), HR_FORMAT_PARAMS(global_hr)));
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3144 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3145
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3146 // Verify the task fingers
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3147 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	3148 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	3149 CMTask* task = _tasks[i];
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3150 HeapWord* task_finger = task->finger();
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3151 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	3152 // 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	3153 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	3154 guarantee(task_finger == task_hr->bottom() \|\|
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3155 !task_hr->in_collection_set(),
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3156 err_msg("task finger: "PTR_FORMAT" region: "HR_FORMAT,
17937 78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang drchase parents: 17844 diff changeset	3157 p2i(task_finger), HR_FORMAT_PARAMS(task_hr)));
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3158 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3159 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3160 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3161 }
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	3162 #endif // PRODUCT
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3163
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3164 // Aggregate the counting data that was constructed concurrently
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3165 // with marking.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3166 class AggregateCountDataHRClosure: public HeapRegionClosure {
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	3167 G1CollectedHeap* _g1h;
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3168 ConcurrentMark* _cm;
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	3169 CardTableModRefBS* _ct_bs;
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3170 BitMap* _cm_card_bm;
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3171 uint _max_worker_id;
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3172
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3173 public:
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	3174 AggregateCountDataHRClosure(G1CollectedHeap* g1h,
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3175 BitMap* cm_card_bm,
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3176 uint max_worker_id) :
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	3177 _g1h(g1h), _cm(g1h->concurrent_mark()),
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	3178 _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	3179 _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	3180
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3181 bool doHeapRegion(HeapRegion* hr) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3182 if (hr->continuesHumongous()) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3183 // 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	3184 // associated "starts humongous" region is processed.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3185 // Note that we cannot rely on their associated
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3186 // "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	3187 // 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	3188 // iteration, a "continues humongous" region might be visited
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3189 // before its associated "starts humongous".
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3190 return false;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3191 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3192
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3193 HeapWord* start = hr->bottom();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3194 HeapWord* limit = hr->next_top_at_mark_start();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3195 HeapWord* end = hr->end();
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 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	3198 err_msg("Preconditions not met - "
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3199 "start: "PTR_FORMAT", limit: "PTR_FORMAT", "
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3200 "top: "PTR_FORMAT", end: "PTR_FORMAT,
17937 78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang drchase parents: 17844 diff changeset	3201 p2i(start), p2i(limit), p2i(hr->top()), p2i(hr->end())));
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3202
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3203 assert(hr->next_marked_bytes() == 0, "Precondition");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3204
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3205 if (start == limit) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3206 // 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	3207 return false;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3208 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3209
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	3210 // 'start' should be in the heap.
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	3211 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	3212 // '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	3213 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	3214
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3215 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	3216 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	3217 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	3218
6812 988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	3219 // 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	3220 // 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	3221 // the object ending at ntams.
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	3222 // 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	3223 // 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	3224 // limit_idx will then correspond to a (non-existent) card
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	3225 // that is also outside the heap.
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification johnc parents: 6750 diff changeset	3226 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	3227 limit_idx += 1;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3228 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3229
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3230 assert(limit_idx <= end_idx, "or else use atomics");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3231
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3232 // 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	3233 uint hrs_index = hr->hrs_index();
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3234 size_t marked_bytes = 0;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3235
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3236 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	3237 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	3238 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	3239
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3240 // 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	3241 // add it to the running total for this region.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3242 marked_bytes += marked_bytes_array[hrs_index];
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3243
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3244 // 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	3245 // into the global card bitmap.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3246 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	3247
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3248 while (scan_idx < limit_idx) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3249 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	3250 _cm_card_bm->set_bit(scan_idx);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3251 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	3252
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3253 // 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	3254 // 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	3255 // 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	3256 // 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	3257 // passed in for left offset here.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3258 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	3259 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	3260 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3261 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3262
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3263 // Update the marked bytes for this region.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3264 hr->add_to_marked_bytes(marked_bytes);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3265
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3266 // Next heap region
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3267 return false;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3268 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3269 };
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3270
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3271 class G1AggregateCountDataTask: public AbstractGangTask {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3272 protected:
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3273 G1CollectedHeap* _g1h;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3274 ConcurrentMark* _cm;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3275 BitMap* _cm_card_bm;
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3276 uint _max_worker_id;
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3277 int _active_workers;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3278
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3279 public:
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3280 G1AggregateCountDataTask(G1CollectedHeap* g1h,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3281 ConcurrentMark* cm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3282 BitMap* cm_card_bm,
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3283 uint max_worker_id,
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3284 int n_workers) :
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3285 AbstractGangTask("Count Aggregation"),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3286 _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	3287 _max_worker_id(max_worker_id),
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3288 _active_workers(n_workers) { }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3289
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3290 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	3291 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	3292
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3293 if (G1CollectedHeap::use_parallel_gc_threads()) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3294 _g1h->heap_region_par_iterate_chunked(&cl, worker_id,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3295 _active_workers,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3296 HeapRegion::AggregateCountClaimValue);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3297 } else {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3298 _g1h->heap_region_iterate(&cl);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3299 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3300 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3301 };
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3302
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3303
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3304 void ConcurrentMark::aggregate_count_data() {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3305 int n_workers = (G1CollectedHeap::use_parallel_gc_threads() ?
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3306 _g1h->workers()->active_workers() :
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3307 1);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3308
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3309 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	3310 _max_worker_id, n_workers);
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3311
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3312 if (G1CollectedHeap::use_parallel_gc_threads()) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3313 assert(_g1h->check_heap_region_claim_values(HeapRegion::InitialClaimValue),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3314 "sanity check");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3315 _g1h->set_par_threads(n_workers);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3316 _g1h->workers()->run_task(&g1_par_agg_task);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3317 _g1h->set_par_threads(0);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3318
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3319 assert(_g1h->check_heap_region_claim_values(HeapRegion::AggregateCountClaimValue),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3320 "sanity check");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3321 _g1h->reset_heap_region_claim_values();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3322 } else {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3323 g1_par_agg_task.work(0);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3324 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3325 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3326
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3327 // 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	3328 void ConcurrentMark::clear_all_count_data() {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3329 // 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	3330 // liveness count aggregation (during remark) and the
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3331 // final counting task.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3332 _card_bm.clear();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3333
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3334 // 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	3335 // of the final counting task.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3336 _region_bm.clear();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3337
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	3338 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	3339 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	3340
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3341 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	3342 BitMap* task_card_bm = count_card_bitmap_for(i);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3343 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	3344
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3345 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	3346 assert(marked_bytes_array != NULL, "uninitialized");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3347
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	3348 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	3349 task_card_bm->clear();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3350 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3351 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3352
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3353 void ConcurrentMark::print_stats() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3354 if (verbose_stats()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3355 gclog_or_tty->print_cr("---------------------------------------------------------------------");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3356 for (size_t i = 0; i < _active_tasks; ++i) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3357 _tasks[i]->print_stats();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3358 gclog_or_tty->print_cr("---------------------------------------------------------------------");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3359 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3360 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3361 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3362
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3363 // abandon current marking iteration due to a Full GC
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3364 void ConcurrentMark::abort() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3365 // Clear all marks to force marking thread to do nothing
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3366 _nextMarkBitMap->clearAll();
20291 e0954897238a 7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS brutisso parents: 20282 diff changeset	3367
e0954897238a 7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS brutisso parents: 20282 diff changeset	3368 // Note we cannot clear the previous marking bitmap here
e0954897238a 7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS brutisso parents: 20282 diff changeset	3369 // since VerifyDuringGC verifies the objects marked during
e0954897238a 7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS brutisso parents: 20282 diff changeset	3370 // a full GC against the previous bitmap.
e0954897238a 7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS brutisso parents: 20282 diff changeset	3371
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3372 // Clear the liveness counting data
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3373 clear_all_count_data();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3374 // Empty mark stack
7450 d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes johnc parents: 7397 diff changeset	3375 reset_marking_state();
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3376 for (uint i = 0; i < _max_worker_id; ++i) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3377 _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	3378 }
17949 487f09bf44e0 8040803: G1: Concurrent mark hangs when mark stack overflows pliden parents: 17937 diff changeset	3379 _first_overflow_barrier_sync.abort();
487f09bf44e0 8040803: G1: Concurrent mark hangs when mark stack overflows pliden parents: 17937 diff changeset	3380 _second_overflow_barrier_sync.abort();
20190 0982ec23da03 8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps brutisso parents: 17950 diff changeset	3381 const GCId& gc_id = _g1h->gc_tracer_cm()->gc_id();
0982ec23da03 8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps brutisso parents: 17950 diff changeset	3382 if (!gc_id.is_undefined()) {
0982ec23da03 8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps brutisso parents: 17950 diff changeset	3383 // We can do multiple full GCs before ConcurrentMarkThread::run() gets a chance
0982ec23da03 8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps brutisso parents: 17950 diff changeset	3384 // to detect that it was aborted. Only keep track of the first GC id that we aborted.
0982ec23da03 8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps brutisso parents: 17950 diff changeset	3385 _aborted_gc_id = gc_id;
0982ec23da03 8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps brutisso parents: 17950 diff changeset	3386 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3387 _has_aborted = 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 SATBMarkQueueSet& satb_mq_set = JavaThread::satb_mark_queue_set();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3390 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	3391 // 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	3392 // 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	3393 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	3394 false, /* new active value */
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1314 diff changeset	3395 satb_mq_set.is_active() /* expected_active */);
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	3396
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	3397 _g1h->trace_heap_after_concurrent_cycle();
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10290 diff changeset	3398 _g1h->register_concurrent_cycle_end();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3399 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3400
20190 0982ec23da03 8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps brutisso parents: 17950 diff changeset	3401 const GCId& ConcurrentMark::concurrent_gc_id() {
0982ec23da03 8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps brutisso parents: 17950 diff changeset	3402 if (has_aborted()) {
0982ec23da03 8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps brutisso parents: 17950 diff changeset	3403 return _aborted_gc_id;
0982ec23da03 8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps brutisso parents: 17950 diff changeset	3404 }
0982ec23da03 8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps brutisso parents: 17950 diff changeset	3405 return _g1h->gc_tracer_cm()->gc_id();
0982ec23da03 8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps brutisso parents: 17950 diff changeset	3406 }
0982ec23da03 8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps brutisso parents: 17950 diff changeset	3407
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3408 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	3409 NumberSeq& ns) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3410 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	3411 prefix, ns.num(), name, ns.sum()/1000.0, ns.avg());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3412 if (ns.num() > 0) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3413 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	3414 prefix, ns.sd(), ns.maximum());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3415 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3416 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3417
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3418 void ConcurrentMark::print_summary_info() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3419 gclog_or_tty->print_cr(" Concurrent marking:");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3420 print_ms_time_info(" ", "init marks", _init_times);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3421 print_ms_time_info(" ", "remarks", _remark_times);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3422 {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3423 print_ms_time_info(" ", "final marks", _remark_mark_times);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3424 print_ms_time_info(" ", "weak refs", _remark_weak_ref_times);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3425
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3426 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3427 print_ms_time_info(" ", "cleanups", _cleanup_times);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3428 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	3429 _total_counting_time,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3430 (_cleanup_times.num() > 0 ? _total_counting_time * 1000.0 /
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3431 (double)_cleanup_times.num()
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3432 : 0.0));
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3433 if (G1ScrubRemSets) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3434 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	3435 _total_rs_scrub_time,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3436 (_cleanup_times.num() > 0 ? _total_rs_scrub_time * 1000.0 /
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3437 (double)_cleanup_times.num()
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3438 : 0.0));
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3439 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3440 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	3441 (_init_times.sum() + _remark_times.sum() +
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3442 _cleanup_times.sum())/1000.0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3443 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	3444 "(%8.2f s marking).",
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3445 cmThread()->vtime_accum(),
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	3446 cmThread()->vtime_mark_accum());
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3447 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3448
1019 035d2e036a9b 6885041: G1: inconsistent thread dump tonyp parents: 993 diff changeset	3449 void ConcurrentMark::print_worker_threads_on(outputStream* st) const {
8008 256d3f43c177 8005875: G1: Kitchensink fails with ParallelGCThreads=0 johnc parents: 8006 diff changeset	3450 if (use_parallel_marking_threads()) {
256d3f43c177 8005875: G1: Kitchensink fails with ParallelGCThreads=0 johnc parents: 8006 diff changeset	3451 _parallel_workers->print_worker_threads_on(st);
256d3f43c177 8005875: G1: Kitchensink fails with ParallelGCThreads=0 johnc parents: 8006 diff changeset	3452 }
1019 035d2e036a9b 6885041: G1: inconsistent thread dump tonyp parents: 993 diff changeset	3453 }
035d2e036a9b 6885041: G1: inconsistent thread dump tonyp parents: 993 diff changeset	3454
9076 7b835924c31c 8011872: Include Bit Map addresses in the hs_err files stefank parents: 8789 diff changeset	3455 void ConcurrentMark::print_on_error(outputStream* st) const {
7b835924c31c 8011872: Include Bit Map addresses in the hs_err files stefank parents: 8789 diff changeset	3456 st->print_cr("Marking Bits (Prev, Next): (CMBitMap) " PTR_FORMAT ", (CMBitMap) " PTR_FORMAT,
17937 78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang drchase parents: 17844 diff changeset	3457 p2i(_prevMarkBitMap), p2i(_nextMarkBitMap));
9076 7b835924c31c 8011872: Include Bit Map addresses in the hs_err files stefank parents: 8789 diff changeset	3458 _prevMarkBitMap->print_on_error(st, " Prev Bits: ");
7b835924c31c 8011872: Include Bit Map addresses in the hs_err files stefank parents: 8789 diff changeset	3459 _nextMarkBitMap->print_on_error(st, " Next Bits: ");
7b835924c31c 8011872: Include Bit Map addresses in the hs_err files stefank parents: 8789 diff changeset	3460 }
7b835924c31c 8011872: Include Bit Map addresses in the hs_err files stefank parents: 8789 diff changeset	3461
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3462 // 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	3463 bool ConcurrentMark::do_yield_check(uint worker_id) {
20192 581e70386ec9 8039147: Cleanup SuspendibleThreadSet pliden parents: 20190 diff changeset	3464 if (SuspendibleThreadSet::should_yield()) {
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4711 diff changeset	3465 if (worker_id == 0) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3466 _g1h->g1_policy()->record_concurrent_pause();
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3467 }
20192 581e70386ec9 8039147: Cleanup SuspendibleThreadSet pliden parents: 20190 diff changeset	3468 SuspendibleThreadSet::yield();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3469 return true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3470 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3471 return false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3472 }
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 bool ConcurrentMark::containing_card_is_marked(void* p) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3476 size_t offset = pointer_delta(p, _g1h->reserved_region().start(), 1);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3477 return _card_bm.at(offset >> CardTableModRefBS::card_shift);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3478 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3479
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3480 bool ConcurrentMark::containing_cards_are_marked(void* start,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3481 void* last) {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3482 return containing_card_is_marked(start) &&
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3483 containing_card_is_marked(last);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3484 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3485
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3486 #ifndef PRODUCT
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3487 // for debugging purposes
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3488 void ConcurrentMark::print_finger() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3489 gclog_or_tty->print_cr("heap ["PTR_FORMAT", "PTR_FORMAT"), global finger = "PTR_FORMAT,
17937 78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang drchase parents: 17844 diff changeset	3490 p2i(_heap_start), p2i(_heap_end), p2i(_finger));
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3491 for (uint i = 0; i < _max_worker_id; ++i) {
17937 78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang drchase parents: 17844 diff changeset	3492 gclog_or_tty->print(" %u: " PTR_FORMAT, i, p2i(_tasks[i]->finger()));
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3493 }
17937 78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang drchase parents: 17844 diff changeset	3494 gclog_or_tty->cr();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3495 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3496 #endif
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3497
3771 842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3498 void CMTask::scan_object(oop obj) {
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3499 assert(_nextMarkBitMap->isMarked((HeapWord*) obj), "invariant");
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3500
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3501 if (_cm->verbose_high()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3502 gclog_or_tty->print_cr("[%u] we're scanning object "PTR_FORMAT,
17937 78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang drchase parents: 17844 diff changeset	3503 _worker_id, p2i((void*) obj));
3771 842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3504 }
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3505
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3506 size_t obj_size = obj->size();
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3507 _words_scanned += obj_size;
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3508
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3509 obj->oop_iterate(_cm_oop_closure);
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3510 statsOnly( ++_objs_scanned );
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3511 check_limits();
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3512 }
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3513
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3514 // Closure for iteration over bitmaps
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3515 class CMBitMapClosure : public BitMapClosure {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3516 private:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3517 // the bitmap that is being iterated over
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3518 CMBitMap* _nextMarkBitMap;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3519 ConcurrentMark* _cm;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3520 CMTask* _task;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3521
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3522 public:
5988 2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	3523 CMBitMapClosure(CMTask task, ConcurrentMark cm, CMBitMap* nextMarkBitMap) :
2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	3524 _task(task), _cm(cm), _nextMarkBitMap(nextMarkBitMap) { }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3525
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3526 bool do_bit(size_t offset) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3527 HeapWord* addr = _nextMarkBitMap->offsetToHeapWord(offset);
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3528 assert(_nextMarkBitMap->isMarked(addr), "invariant");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3529 assert( addr < _cm->finger(), "invariant");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3530
5988 2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	3531 statsOnly( _task->increase_objs_found_on_bitmap() );
2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	3532 assert(addr >= _task->finger(), "invariant");
2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	3533
2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	3534 // We move that task's local finger along.
2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	3535 _task->move_finger_to(addr);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3536
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3537 _task->scan_object(oop(addr));
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3538 // we only partially drain the local queue and global stack
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3539 _task->drain_local_queue(true);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3540 _task->drain_global_stack(true);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3541
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3542 // 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	3543 // the iteration
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3544 return !_task->has_aborted();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3545 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3546 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3547
3771 842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3548 G1CMOopClosure::G1CMOopClosure(G1CollectedHeap* g1h,
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3549 ConcurrentMark* cm,
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3550 CMTask* task)
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3551 : _g1h(g1h), _cm(cm), _task(task) {
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3552 assert(_ref_processor == NULL, "should be initialized to NULL");
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3553
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3554 if (G1UseConcMarkReferenceProcessing) {
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3977 diff changeset	3555 _ref_processor = g1h->ref_processor_cm();
3771 842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3556 assert(_ref_processor != NULL, "should not be NULL");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3557 }
3771 842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3558 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3559
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3560 void CMTask::setup_for_region(HeapRegion* hr) {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3561 // Separated the asserts so that we know which one fires.
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3562 assert(hr != NULL,
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3563 "claim_region() should have filtered out continues humongous regions");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3564 assert(!hr->continuesHumongous(),
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3565 "claim_region() should have filtered out continues humongous regions");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3566
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3567 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3568 gclog_or_tty->print_cr("[%u] setting up for region "PTR_FORMAT,
17937 78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang drchase parents: 17844 diff changeset	3569 _worker_id, p2i(hr));
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3570 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3571
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3572 _curr_region = hr;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3573 _finger = hr->bottom();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3574 update_region_limit();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3575 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3576
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3577 void CMTask::update_region_limit() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3578 HeapRegion* hr = _curr_region;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3579 HeapWord* bottom = hr->bottom();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3580 HeapWord* limit = hr->next_top_at_mark_start();
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 if (limit == bottom) {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3583 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3584 gclog_or_tty->print_cr("[%u] found an empty region "
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3585 "["PTR_FORMAT", "PTR_FORMAT")",
17937 78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang drchase parents: 17844 diff changeset	3586 _worker_id, p2i(bottom), p2i(limit));
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3587 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3588 // The region was collected underneath our feet.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3589 // We set the finger to bottom to ensure that the bitmap
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3590 // iteration that will follow this will not do anything.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3591 // (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	3592 // 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	3593 _finger = bottom;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3594 } else if (limit >= _region_limit) {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3595 assert(limit >= _finger, "peace of mind");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3596 } else {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3597 assert(limit < _region_limit, "only way to get here");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3598 // This can happen under some pretty unusual circumstances. An
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3599 // evacuation pause empties the region underneath our feet (NTAMS
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3600 // at bottom). We then do some allocation in the region (NTAMS
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3601 // 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	3602 // alloc region (NTAMS will move to top() and the objects
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3603 // originally below it will be grayed). All objects now marked in
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3604 // the region are explicitly grayed, if below the global finger,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3605 // 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	3606 // set _finger to be limit to ensure that the bitmap iteration
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3607 // doesn't do anything.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3608 _finger = limit;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3609 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3610
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3611 _region_limit = limit;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3612 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3613
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3614 void CMTask::giveup_current_region() {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3615 assert(_curr_region != NULL, "invariant");
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3616 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3617 gclog_or_tty->print_cr("[%u] giving up region "PTR_FORMAT,
17937 78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang drchase parents: 17844 diff changeset	3618 _worker_id, p2i(_curr_region));
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3619 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3620 clear_region_fields();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3621 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3622
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3623 void CMTask::clear_region_fields() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3624 // Values for these three fields that indicate that we're not
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3625 // holding on to a region.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3626 _curr_region = NULL;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3627 _finger = NULL;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3628 _region_limit = NULL;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3629 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3630
3771 842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3631 void CMTask::set_cm_oop_closure(G1CMOopClosure* cm_oop_closure) {
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3632 if (cm_oop_closure == NULL) {
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3633 assert(_cm_oop_closure != NULL, "invariant");
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3634 } else {
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3635 assert(_cm_oop_closure == NULL, "invariant");
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3636 }
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3637 _cm_oop_closure = cm_oop_closure;
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3638 }
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	3639
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3640 void CMTask::reset(CMBitMap* nextMarkBitMap) {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3641 guarantee(nextMarkBitMap != NULL, "invariant");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3642
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3643 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3644 gclog_or_tty->print_cr("[%u] resetting", _worker_id);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3645 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3646
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3647 _nextMarkBitMap = nextMarkBitMap;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3648 clear_region_fields();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3649
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3650 _calls = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3651 _elapsed_time_ms = 0.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3652 _termination_time_ms = 0.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3653 _termination_start_time_ms = 0.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3654
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3655 #if _MARKING_STATS_
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3656 _local_pushes = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3657 _local_pops = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3658 _local_max_size = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3659 _objs_scanned = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3660 _global_pushes = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3661 _global_pops = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3662 _global_max_size = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3663 _global_transfers_to = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3664 _global_transfers_from = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3665 _regions_claimed = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3666 _objs_found_on_bitmap = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3667 _satb_buffers_processed = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3668 _steal_attempts = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3669 _steals = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3670 _aborted = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3671 _aborted_overflow = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3672 _aborted_cm_aborted = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3673 _aborted_yield = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3674 _aborted_timed_out = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3675 _aborted_satb = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3676 _aborted_termination = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3677 #endif // _MARKING_STATS_
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 bool CMTask::should_exit_termination() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3681 regular_clock_call();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3682 // 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	3683 // 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	3684 // 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	3685 return !_cm->mark_stack_empty() \|\| has_aborted();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3686 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3687
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3688 void CMTask::reached_limit() {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3689 assert(_words_scanned >= _words_scanned_limit \|\|
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3690 _refs_reached >= _refs_reached_limit ,
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3691 "shouldn't have been called otherwise");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3692 regular_clock_call();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3693 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3694
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3695 void CMTask::regular_clock_call() {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3696 if (has_aborted()) return;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3697
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3698 // First, we need to recalculate the words scanned and refs reached
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3699 // limits for the next clock call.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3700 recalculate_limits();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3701
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3702 // During the regular clock call we do the following
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 // (1) If an overflow has been flagged, then we abort.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3705 if (_cm->has_overflown()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3706 set_has_aborted();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3707 return;
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 // 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	3711 // to check anything else. The other steps are only needed during
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3712 // the concurrent marking phase.
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3713 if (!concurrent()) return;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3714
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3715 // (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	3716 if (_cm->has_aborted()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3717 set_has_aborted();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3718 statsOnly( ++_aborted_cm_aborted );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3719 return;
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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3722 double curr_time_ms = os::elapsedVTime() * 1000.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3723
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3724 // (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	3725 #if _MARKING_STATS_
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3726 if (_words_scanned >= _words_scanned_limit) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3727 ++_clock_due_to_scanning;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3728 }
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3729 if (_refs_reached >= _refs_reached_limit) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3730 ++_clock_due_to_marking;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3731 }
342 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 double last_interval_ms = curr_time_ms - _interval_start_time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3734 _interval_start_time_ms = curr_time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3735 _all_clock_intervals_ms.add(last_interval_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3736
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3737 if (_cm->verbose_medium()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3738 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	3739 "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	3740 _worker_id, last_interval_ms,
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3741 _words_scanned,
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3742 (_words_scanned >= _words_scanned_limit) ? " (*)" : "",
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3743 _refs_reached,
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3744 (_refs_reached >= _refs_reached_limit) ? " (*)" : "");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3745 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3746 #endif // _MARKING_STATS_
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3747
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3748 // (4) We check whether we should yield. If we have to, then we abort.
20192 581e70386ec9 8039147: Cleanup SuspendibleThreadSet pliden parents: 20190 diff changeset	3749 if (SuspendibleThreadSet::should_yield()) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3750 // 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	3751 // responsible for yielding.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3752 set_has_aborted();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3753 statsOnly( ++_aborted_yield );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3754 return;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3755 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3756
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3757 // (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	3758 // then we abort.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3759 double elapsed_time_ms = curr_time_ms - _start_time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3760 if (elapsed_time_ms > _time_target_ms) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3761 set_has_aborted();
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	3762 _has_timed_out = true;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3763 statsOnly( ++_aborted_timed_out );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3764 return;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3765 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3766
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3767 // (6) Finally, we check whether there are enough completed STAB
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3768 // buffers available for processing. If there are, we abort.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3769 SATBMarkQueueSet& satb_mq_set = JavaThread::satb_mark_queue_set();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3770 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	3771 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3772 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	3773 _worker_id);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3774 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3775 // 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	3776 // the marking task to do so
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3777 set_has_aborted();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3778 statsOnly( ++_aborted_satb );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3779 return;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3780 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3781 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3782
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3783 void CMTask::recalculate_limits() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3784 _real_words_scanned_limit = _words_scanned + words_scanned_period;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3785 _words_scanned_limit = _real_words_scanned_limit;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3786
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3787 _real_refs_reached_limit = _refs_reached + refs_reached_period;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3788 _refs_reached_limit = _real_refs_reached_limit;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3789 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3790
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3791 void CMTask::decrease_limits() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3792 // 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	3793 // 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	3794 // 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	3795 // scanning limit so that the clock is called earlier.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3796
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3797 if (_cm->verbose_medium()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3798 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	3799 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3800
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3801 _words_scanned_limit = _real_words_scanned_limit -
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3802 3 * words_scanned_period / 4;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3803 _refs_reached_limit = _real_refs_reached_limit -
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3804 3 * refs_reached_period / 4;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3805 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3806
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3807 void CMTask::move_entries_to_global_stack() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3808 // 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	3809 // from the local queue
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3810 oop buffer[global_stack_transfer_size];
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3811
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3812 int n = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3813 oop obj;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3814 while (n < global_stack_transfer_size && _task_queue->pop_local(obj)) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3815 buffer[n] = obj;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3816 ++n;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3817 }
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 if (n > 0) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3820 // we popped at least one entry from the local queue
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3821
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3822 statsOnly( ++_global_transfers_to; _local_pops += n );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3823
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3824 if (!_cm->mark_stack_push(buffer, n)) {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3825 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3826 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	3827 _worker_id);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3828 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3829 set_has_aborted();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3830 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3831 // the transfer was successful
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3832
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3833 if (_cm->verbose_medium()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3834 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	3835 _worker_id, n);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3836 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3837 statsOnly( int tmp_size = _cm->mark_stack_size();
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3838 if (tmp_size > _global_max_size) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3839 _global_max_size = tmp_size;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3840 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3841 _global_pushes += n );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3842 }
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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3845 // this operation was quite expensive, so decrease the limits
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3846 decrease_limits();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3847 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3848
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3849 void CMTask::get_entries_from_global_stack() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3850 // 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	3851 // from the global stack.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3852 oop buffer[global_stack_transfer_size];
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3853 int n;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3854 _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	3855 assert(n <= global_stack_transfer_size,
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3856 "we should not pop more than the given limit");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3857 if (n > 0) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3858 // yes, we did actually pop at least one entry
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3859
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3860 statsOnly( ++_global_transfers_from; _global_pops += n );
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3861 if (_cm->verbose_medium()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3862 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	3863 _worker_id, n);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3864 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3865 for (int i = 0; i < n; ++i) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3866 bool success = _task_queue->push(buffer[i]);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3867 // 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	3868 // 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	3869 assert(success, "invariant");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3870 }
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 statsOnly( int tmp_size = _task_queue->size();
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3873 if (tmp_size > _local_max_size) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3874 _local_max_size = tmp_size;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3875 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3876 _local_pushes += n );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3877 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3878
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3879 // this operation was quite expensive, so decrease the limits
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3880 decrease_limits();
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 void CMTask::drain_local_queue(bool partially) {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3884 if (has_aborted()) return;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3885
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3886 // 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	3887 // 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	3888 // of things to do) or totally (at the very end).
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3889 size_t target_size;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3890 if (partially) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3891 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	3892 } else {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3893 target_size = 0;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3894 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3895
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3896 if (_task_queue->size() > target_size) {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3897 if (_cm->verbose_high()) {
17937 78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang drchase parents: 17844 diff changeset	3898 gclog_or_tty->print_cr("[%u] draining local queue, target size = " SIZE_FORMAT,
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3899 _worker_id, target_size);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3900 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3901
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3902 oop obj;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3903 bool ret = _task_queue->pop_local(obj);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3904 while (ret) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3905 statsOnly( ++_local_pops );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3906
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3907 if (_cm->verbose_high()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3908 gclog_or_tty->print_cr("[%u] popped "PTR_FORMAT, _worker_id,
17937 78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang drchase parents: 17844 diff changeset	3909 p2i((void*) obj));
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3910 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3911
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3912 assert(_g1h->is_in_g1_reserved((HeapWord*) obj), "invariant" );
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2177 diff changeset	3913 assert(!_g1h->is_on_master_free_list(
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2149 diff changeset	3914 _g1h->heap_region_containing((HeapWord*) obj)), "invariant");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3915
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3916 scan_object(obj);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3917
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3918 if (_task_queue->size() <= target_size \|\| has_aborted()) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3919 ret = false;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3920 } else {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3921 ret = _task_queue->pop_local(obj);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3922 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3923 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3924
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3925 if (_cm->verbose_high()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3926 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	3927 _worker_id, _task_queue->size());
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3928 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3929 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3930 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3931
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3932 void CMTask::drain_global_stack(bool partially) {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3933 if (has_aborted()) return;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3934
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3935 // 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	3936 // drain the global stack.
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	3937 assert(partially \|\| _task_queue->size() == 0, "invariant");
342 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 // 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	3940 // 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	3941 // 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	3942 // because we move entries from the global stack in chunks or
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3943 // 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	3944 // drop below the target. But, this is not a problem.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3945 size_t target_size;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3946 if (partially) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3947 target_size = _cm->partial_mark_stack_size_target();
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3948 } else {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3949 target_size = 0;
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3950 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3951
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3952 if (_cm->mark_stack_size() > target_size) {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3953 if (_cm->verbose_low()) {
17937 78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang drchase parents: 17844 diff changeset	3954 gclog_or_tty->print_cr("[%u] draining global_stack, target size " SIZE_FORMAT,
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3955 _worker_id, target_size);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3956 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3957
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3958 while (!has_aborted() && _cm->mark_stack_size() > target_size) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3959 get_entries_from_global_stack();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3960 drain_local_queue(partially);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3961 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3962
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3963 if (_cm->verbose_low()) {
17937 78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang drchase parents: 17844 diff changeset	3964 gclog_or_tty->print_cr("[%u] drained global stack, size = " SIZE_FORMAT,
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3965 _worker_id, _cm->mark_stack_size());
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3966 }
342 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 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3969
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3970 // 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	3971 // 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	3972 // replicated. We should really get rid of the single-threaded version
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3973 // of the code to simplify things.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3974 void CMTask::drain_satb_buffers() {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3975 if (has_aborted()) return;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3976
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3977 // 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	3978 // 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	3979 // notices that SATB buffers are available for draining. It'd be
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3980 // very counter productive if it did that. :-)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3981 _draining_satb_buffers = true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3982
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3983 CMObjectClosure oc(this);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3984 SATBMarkQueueSet& satb_mq_set = JavaThread::satb_mark_queue_set();
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3985 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	3986 satb_mq_set.set_par_closure(_worker_id, &oc);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3987 } else {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3988 satb_mq_set.set_closure(&oc);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	3989 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3990
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3991 // This keeps claiming and applying the closure to completed buffers
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3992 // 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	3993 if (G1CollectedHeap::use_parallel_gc_threads()) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3994 while (!has_aborted() &&
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3995 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	3996 if (_cm->verbose_medium()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	3997 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	3998 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3999 statsOnly( ++_satb_buffers_processed );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4000 regular_clock_call();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4001 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4002 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4003 while (!has_aborted() &&
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4004 satb_mq_set.apply_closure_to_completed_buffer()) {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4005 if (_cm->verbose_medium()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4006 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	4007 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4008 statsOnly( ++_satb_buffers_processed );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4009 regular_clock_call();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4010 }
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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4013 _draining_satb_buffers = false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4014
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4015 assert(has_aborted() \|\|
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4016 concurrent() \|\|
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4017 satb_mq_set.completed_buffers_num() == 0, "invariant");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4018
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4019 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	4020 satb_mq_set.set_par_closure(_worker_id, NULL);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4021 } else {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4022 satb_mq_set.set_closure(NULL);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4023 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4024
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4025 // again, this was a potentially expensive operation, decrease the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4026 // limits to get the regular clock call early
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4027 decrease_limits();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4028 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4029
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4030 void CMTask::print_stats() {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4031 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	4032 _worker_id, _calls);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4033 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	4034 _elapsed_time_ms, _termination_time_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4035 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	4036 _step_times_ms.num(), _step_times_ms.avg(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4037 _step_times_ms.sd());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4038 gclog_or_tty->print_cr(" max = %1.2lfms, total = %1.2lfms",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4039 _step_times_ms.maximum(), _step_times_ms.sum());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4040
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4041 #if _MARKING_STATS_
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4042 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	4043 _all_clock_intervals_ms.num(), _all_clock_intervals_ms.avg(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4044 _all_clock_intervals_ms.sd());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4045 gclog_or_tty->print_cr(" max = %1.2lfms, total = %1.2lfms",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4046 _all_clock_intervals_ms.maximum(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4047 _all_clock_intervals_ms.sum());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4048 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	4049 _clock_due_to_scanning, _clock_due_to_marking);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4050 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	4051 _objs_scanned, _objs_found_on_bitmap);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4052 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	4053 _local_pushes, _local_pops, _local_max_size);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4054 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	4055 _global_pushes, _global_pops, _global_max_size);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4056 gclog_or_tty->print_cr(" transfers to = %d, transfers from = %d",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4057 _global_transfers_to,_global_transfers_from);
5988 2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	4058 gclog_or_tty->print_cr(" Regions: claimed = %d", _regions_claimed);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4059 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	4060 gclog_or_tty->print_cr(" Steals: attempts = %d, successes = %d",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4061 _steal_attempts, _steals);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4062 gclog_or_tty->print_cr(" Aborted: %d, due to", _aborted);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4063 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	4064 _aborted_overflow, _aborted_cm_aborted, _aborted_yield);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4065 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	4066 _aborted_timed_out, _aborted_satb, _aborted_termination);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4067 #endif // _MARKING_STATS_
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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4070 /*****************************************************************************
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4071
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4072 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	4073 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	4074 with other invocations of do_marking_step() on different tasks
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4075 (but only one per task, obviously) and concurrently with the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4076 mutator threads, or during remark, hence it eliminates the need
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4077 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	4078 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	4079 phase. Interestingly, tasks are also claimable during evacuation
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4080 pauses too, since do_marking_step() ensures that it aborts before
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4081 it needs to yield.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4082
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4083 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	4084 following:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4085
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4086 (1) Marking Bitmap. If there are gray objects that appear only
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4087 on the bitmap (this happens either when dealing with an overflow
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4088 or when the initial marking phase has simply marked the roots
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4089 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	4090 regions whose bitmap they then scan to find gray objects. A
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4091 global finger indicates where the end of the last claimed region
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4092 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	4093 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	4094 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	4095 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	4096 pushed on a stack).
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4097
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4098 (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	4099 reasonably efficiently by the task. Other tasks can steal from
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4100 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	4101 task attempts to keep its local queue short but not totally
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4102 empty, so that entries are available for stealing by other
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4103 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	4104 drain its local queue.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4105
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4106 (3) Global Mark Stack. This handles local queue overflow. During
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4107 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	4108 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	4109 interaction with it which might cause contention. If it
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4110 overflows, then the marking phase should restart and iterate
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4111 over the bitmap to identify gray objects. Throughout the marking
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4112 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	4113 length but not totally empty, so that entries are available for
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4114 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	4115 will totally drain the global mark stack.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4116
5988 2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	4117 (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	4118 made available. Buffers are regularly removed from this queue
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4119 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	4120 long. During remark, all completed buffers are processed, as
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4121 well as the filled in parts of any uncompleted buffers.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4122
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4123 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	4124 has been reached. There are a few other cases when the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4125 do_marking_step() method also aborts:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4126
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4127 (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	4128
5988 2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	4129 (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	4130 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	4131 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	4132 (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	4133 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	4134 immediately restart.
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4135
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4136 (3) When enough completed SATB buffers are available. The
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4137 do_marking_step() method only tries to drain SATB buffers right
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4138 at the beginning. So, if enough buffers are available, the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4139 marking step aborts and the SATB buffers are processed at
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4140 the beginning of the next invocation.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4141
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4142 (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	4143 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	4144 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	4145 happens then objects will be compacted underneath our feet, the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4146 heap might shrink, etc. We save checking for this by just
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4147 aborting and doing the yield right at the end.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4148
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4149 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	4150 be called in a loop (or, otherwise, regularly) until it completes.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4151
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4152 If a marking step completes without its has_aborted() flag being
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4153 true, it means it has completed the current marking phase (and
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4154 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	4155
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4156 A method called regular_clock_call() is invoked "regularly" (in
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4157 sub ms intervals) throughout marking. It is this clock method that
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4158 checks all the abort conditions which were mentioned above and
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4159 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	4160 trigger this clock method: when the number of object words the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4161 marking phase has scanned or the number of references the marking
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4162 phase has visited reach a given limit. Additional invocations to
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4163 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	4164 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	4165 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	4166 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	4167 too and not constantly check them throughout the code.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4168
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4169 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	4170 termination protocol.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4171
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4172 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	4173 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	4174 skip any synchronization in the termination and overflow code.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4175 Examples include the serial remark code and the serial reference
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4176 processing closures.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4177
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4178 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	4179 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	4180 Examples include the concurrent marking code (CMMarkingTask),
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4181 the MT remark code, and the MT reference processing closures.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4182
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4183 *****************************************************************************/
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4184
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	4185 void CMTask::do_marking_step(double time_target_ms,
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4186 bool do_termination,
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4187 bool is_serial) {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4188 assert(time_target_ms >= 1.0, "minimum granularity is 1ms");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4189 assert(concurrent() == _cm->concurrent(), "they should be the same");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4190
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4191 G1CollectorPolicy* g1_policy = _g1h->g1_policy();
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4192 assert(_task_queues != NULL, "invariant");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4193 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	4194 assert(_task_queues->queue(_worker_id) == _task_queue, "invariant");
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4195
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4196 assert(!_claimed,
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4197 "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	4198
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4199 // 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	4200 // 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	4201 // 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	4202 // catch most problems.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4203 _claimed = true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4204
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4205 _start_time_ms = os::elapsedVTime() * 1000.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4206 statsOnly( _interval_start_time_ms = _start_time_ms );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4207
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4208 // 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	4209 // 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	4210 // enable stealing when the termination protocol is enabled
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4211 // and do_marking_step() is not being called serially.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4212 bool do_stealing = do_termination && !is_serial;
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4213
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4214 double diff_prediction_ms =
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4215 g1_policy->get_new_prediction(&_marking_step_diffs_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4216 _time_target_ms = time_target_ms - diff_prediction_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4217
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4218 // 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	4219 // call the regular clock method
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4220 _words_scanned = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4221 _refs_reached = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4222 recalculate_limits();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4223
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4224 // clear all flags
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4225 clear_has_aborted();
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	4226 _has_timed_out = false;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4227 _draining_satb_buffers = false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4228
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4229 ++_calls;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4230
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] >>>>>>>>>> START, call = %d, "
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4233 "target = %1.2lfms >>>>>>>>>>",
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4234 _worker_id, _calls, _time_target_ms);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4235 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4236
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4237 // 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	4238 // 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	4239 // statically.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4240 CMBitMapClosure bitmap_closure(this, _cm, _nextMarkBitMap);
3771 842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	4241 G1CMOopClosure cm_oop_closure(_g1h, _cm, this);
842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	4242 set_cm_oop_closure(&cm_oop_closure);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4243
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4244 if (_cm->has_overflown()) {
5988 2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	4245 // 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	4246 // 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	4247 // 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	4248 // right at the end of this task.
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4249 set_has_aborted();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4250 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4251
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4252 // First drain any available SATB buffers. After this, we will not
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4253 // look at SATB buffers before the next invocation of this method.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4254 // If enough completed SATB buffers are queued up, the regular clock
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4255 // will abort this task so that it restarts.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4256 drain_satb_buffers();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4257 // ...then partially drain the local queue and the global stack
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4258 drain_local_queue(true);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4259 drain_global_stack(true);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4260
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4261 do {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4262 if (!has_aborted() && _curr_region != NULL) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4263 // 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	4264 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	4265 "should not be NULL either");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4266
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4267 // We might have restarted this task after an evacuation pause
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4268 // which might have evacuated the region we're holding on to
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4269 // 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	4270 // 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	4271 // contains garbage (update_region_limit() will also move
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4272 // _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	4273 update_region_limit();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4274 // 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	4275 // as we might be restarting this task after aborting half-way
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4276 // through scanning this region. In this case, _finger points to
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4277 // 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	4278 // fresh region, _finger points to start().
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4279 MemRegion mr = MemRegion(_finger, _region_limit);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4280
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4281 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4282 gclog_or_tty->print_cr("[%u] we're scanning part "
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4283 "["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	4284 "of region "HR_FORMAT,
17937 78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang drchase parents: 17844 diff changeset	4285 _worker_id, p2i(_finger), p2i(_region_limit),
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	4286 HR_FORMAT_PARAMS(_curr_region));
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4287 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4288
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	4289 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	4290 "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	4291
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	4292 // 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	4293 // 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	4294 // 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	4295 // 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	4296 // 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	4297 // 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	4298 // that is left.
8034 bce1ac447f6b 7052429: G1: Avoid unnecessary scanning of humongous regions during concurrent marking johnc parents: 8014 diff changeset	4299 // 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	4300 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	4301 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	4302 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	4303 } 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	4304 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	4305 // 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	4306 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	4307 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	4308 }
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	4309 // 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	4310 // 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	4311 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	4312 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	4313 } else if (_nextMarkBitMap->iterate(&bitmap_closure, mr)) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4314 giveup_current_region();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4315 regular_clock_call();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4316 } else {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4317 assert(has_aborted(), "currently the only way to do so");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4318 // The only way to abort the bitmap iteration is to return
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4319 // false from the do_bit() method. However, inside the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4320 // do_bit() method we move the _finger to point to the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4321 // object currently being looked at. So, if we bail out, we
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4322 // have definitely set _finger to something non-null.
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4323 assert(_finger != NULL, "invariant");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4324
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4325 // Region iteration was actually aborted. So now _finger
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4326 // 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	4327 // leave it there, when we restart this task, we will rescan
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4328 // 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	4329 // enough to point to the next possible object header (the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4330 // 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	4331 // granularity).
1314 3f0549ed0c98 6921710: G1: assert(new_finger >= _finger && new_finger < _region_limit,"invariant") apetrusenko parents: 1284 diff changeset	4332 assert(_finger < _region_limit, "invariant");
8733 9def4075da6d 8008079: G1: Add nextObject routine to CMBitMapRO and replace nextWord tamao parents: 8039 diff changeset	4333 HeapWord* new_finger = _nextMarkBitMap->nextObject(_finger);
1314 3f0549ed0c98 6921710: G1: assert(new_finger >= _finger && new_finger < _region_limit,"invariant") apetrusenko parents: 1284 diff changeset	4334 // 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	4335 if (new_finger >= _region_limit) {
5988 2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	4336 giveup_current_region();
1314 3f0549ed0c98 6921710: G1: assert(new_finger >= _finger && new_finger < _region_limit,"invariant") apetrusenko parents: 1284 diff changeset	4337 } else {
5988 2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes tonyp parents: 4837 diff changeset	4338 move_finger_to(new_finger);
1314 3f0549ed0c98 6921710: G1: assert(new_finger >= _finger && new_finger < _region_limit,"invariant") apetrusenko parents: 1284 diff changeset	4339 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4340 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4341 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4342 // At this point we have either completed iterating over the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4343 // region we were holding on to, or we have aborted.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4344
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4345 // We then partially drain the local queue and the global stack.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4346 // (Do we really need this?)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4347 drain_local_queue(true);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4348 drain_global_stack(true);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4349
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4350 // 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	4351 // return NULL with potentially more regions available for
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4352 // 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	4353 // whether we're done or not.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4354 while (!has_aborted() && _curr_region == NULL && !_cm->out_of_regions()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4355 // 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	4356 // given up on the previous one.
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4357 // Separated the asserts so that we know which one fires.
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4358 assert(_curr_region == NULL, "invariant");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4359 assert(_finger == NULL, "invariant");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4360 assert(_region_limit == NULL, "invariant");
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4361 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4362 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	4363 }
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4364 HeapRegion* claimed_region = _cm->claim_region(_worker_id);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4365 if (claimed_region != NULL) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4366 // Yes, we managed to claim one
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4367 statsOnly( ++_regions_claimed );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4368
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4369 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4370 gclog_or_tty->print_cr("[%u] we successfully claimed "
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4371 "region "PTR_FORMAT,
17937 78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang drchase parents: 17844 diff changeset	4372 _worker_id, p2i(claimed_region));
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4373 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4374
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4375 setup_for_region(claimed_region);
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4376 assert(_curr_region == claimed_region, "invariant");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4377 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4378 // 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	4379 // 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	4380 // 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	4381 // method once round the loop to make sure it's called
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4382 // frequently enough.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4383 regular_clock_call();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4384 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4385
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4386 if (!has_aborted() && _curr_region == NULL) {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4387 assert(_cm->out_of_regions(),
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4388 "at this point we should be out of regions");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4389 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4390 } while ( _curr_region != NULL && !has_aborted());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4391
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4392 if (!has_aborted()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4393 // 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	4394 // tasks might be pushing objects to it concurrently.
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4395 assert(_cm->out_of_regions(),
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4396 "at this point we should be out of regions");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4397
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4398 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4399 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	4400 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4401
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4402 // Try to reduce the number of available SATB buffers so that
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4403 // remark has less work to do.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4404 drain_satb_buffers();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4405 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4406
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4407 // 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	4408 // local queue and global stack.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4409 drain_local_queue(false);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4410 drain_global_stack(false);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4411
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4412 // Attempt at work stealing from other task's queues.
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	4413 if (do_stealing && !has_aborted()) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4414 // 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	4415 // we could. Let's try to do some stealing...
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 // 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	4418 // tasks might be pushing objects to it concurrently.
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4419 assert(_cm->out_of_regions() && _task_queue->size() == 0,
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4420 "only way to reach here");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4421
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4422 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4423 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	4424 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4425
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4426 while (!has_aborted()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4427 oop obj;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4428 statsOnly( ++_steal_attempts );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4429
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4430 if (_cm->try_stealing(_worker_id, &_hash_seed, obj)) {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4431 if (_cm->verbose_medium()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4432 gclog_or_tty->print_cr("[%u] stolen "PTR_FORMAT" successfully",
17937 78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang drchase parents: 17844 diff changeset	4433 _worker_id, p2i((void*) obj));
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4434 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4435
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4436 statsOnly( ++_steals );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4437
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4438 assert(_nextMarkBitMap->isMarked((HeapWord*) obj),
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4439 "any stolen object should be marked");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4440 scan_object(obj);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4441
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4442 // 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	4443 // local queue and global stack.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4444 drain_local_queue(false);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4445 drain_global_stack(false);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4446 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4447 break;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4448 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4449 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4450 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4451
3316 cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	4452 // 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	4453 // 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	4454 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	4455 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	4456 _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	4457 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	4458 }
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	4459 }
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this. tonyp parents: 2436 diff changeset	4460
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4461 // 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	4462 // termination protocol.
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	4463 if (do_termination && !has_aborted()) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4464 // 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	4465 // tasks might be concurrently pushing objects on it.
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4466 // Separated the asserts so that we know which one fires.
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4467 assert(_cm->out_of_regions(), "only way to reach here");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4468 assert(_task_queue->size() == 0, "only way to reach here");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4469
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4470 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4471 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	4472 }
342 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 _termination_start_time_ms = os::elapsedVTime() * 1000.0;
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4475
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4476 // The CMTask class also extends the TerminatorTerminator class,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4477 // hence its should_exit_termination() method will also decide
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4478 // whether to exit the termination protocol or not.
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4479 bool finished = (is_serial \|\|
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4480 _cm->terminator()->offer_termination(this));
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4481 double termination_end_time_ms = os::elapsedVTime() * 1000.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4482 _termination_time_ms +=
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4483 termination_end_time_ms - _termination_start_time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4484
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4485 if (finished) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4486 // We're all done.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4487
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4488 if (_worker_id == 0) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4489 // let's allow task 0 to do this
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4490 if (concurrent()) {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4491 assert(_cm->concurrent_marking_in_progress(), "invariant");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4492 // we need to set this to false before the next
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4493 // safepoint. This way we ensure that the marking phase
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4494 // doesn't observe any more heap expansions.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4495 _cm->clear_concurrent_marking_in_progress();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4496 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4497 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4498
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4499 // 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	4500 // all other tasks have finished. We separated the guarantees so
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4501 // 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	4502 // which one.
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4503 guarantee(_cm->out_of_regions(), "only way to reach here");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4504 guarantee(_cm->mark_stack_empty(), "only way to reach here");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4505 guarantee(_task_queue->size() == 0, "only way to reach here");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4506 guarantee(!_cm->has_overflown(), "only way to reach here");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4507 guarantee(!_cm->mark_stack_overflow(), "only way to reach here");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4508
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4509 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4510 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	4511 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4512 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4513 // 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	4514 // 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	4515
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4516 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4517 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	4518 _worker_id);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4519 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4520
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4521 set_has_aborted();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4522 statsOnly( ++_aborted_termination );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4523 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4524 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4525
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4526 // 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	4527 // closure which was statically allocated in this frame doesn't
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4528 // escape it by accident.
3771 842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	4529 set_cm_oop_closure(NULL);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4530 double end_time_ms = os::elapsedVTime() * 1000.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4531 double elapsed_time_ms = end_time_ms - _start_time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4532 // Update the step history.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4533 _step_times_ms.add(elapsed_time_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4534
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4535 if (has_aborted()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4536 // The task was aborted for some reason.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4537
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4538 statsOnly( ++_aborted );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4539
2174 234761c55641 6608385: G1: need to support parallel reference processing johnc parents: 2152 diff changeset	4540 if (_has_timed_out) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4541 double diff_ms = elapsed_time_ms - _time_target_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4542 // Keep statistics of how well we did with respect to hitting
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4543 // 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	4544 // other reasons, then the results might get skewed).
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4545 _marking_step_diffs_ms.add(diff_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4546 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4547
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4548 if (_cm->has_overflown()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4549 // This is the interesting one. We aborted because a global
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4550 // overflow was raised. This means we have to restart the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4551 // marking phase and start iterating over regions. However, in
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4552 // 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	4553 // 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	4554 // will achieve this with the use of two barrier sync points.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4555
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4556 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4557 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	4558 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4559
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4560 if (!is_serial) {
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4561 // 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	4562 // from a parallel context
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4563 _cm->enter_first_sync_barrier(_worker_id);
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4564
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4565 // 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	4566 // stopped doing marking work. So, it's now safe to
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4567 // 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	4568 // task 0 will clear the global data structures.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4569 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4570
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4571 statsOnly( ++_aborted_overflow );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4572
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4573 // We clear the local state of this task...
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4574 clear_region_fields();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4575
8787 fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4576 if (!is_serial) {
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4577 // ...and enter the second barrier.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4578 _cm->enter_second_sync_barrier(_worker_id);
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing johnc parents: 8744 diff changeset	4579 }
8788 e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809 johnc parents: 8787 diff changeset	4580 // 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	4581 // marking, everything has been re-initialized and we're
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4582 // ready to restart.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4583 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4584
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4585 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4586 gclog_or_tty->print_cr("[%u] <<<<<<<<<< ABORTING, target = %1.2lfms, "
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4587 "elapsed = %1.2lfms <<<<<<<<<<",
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4588 _worker_id, _time_target_ms, elapsed_time_ms);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4589 if (_cm->has_aborted()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4590 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	4591 _worker_id);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4592 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4593 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4594 } else {
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4595 if (_cm->verbose_low()) {
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4596 gclog_or_tty->print_cr("[%u] <<<<<<<<<< FINISHED, target = %1.2lfms, "
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4597 "elapsed = %1.2lfms <<<<<<<<<<",
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4598 _worker_id, _time_target_ms, elapsed_time_ms);
3776 23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files tonyp parents: 3772 diff changeset	4599 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4600 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4601
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4602 _claimed = false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4603 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4604
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4605 CMTask::CMTask(uint worker_id,
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4606 ConcurrentMark* cm,
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	4607 size_t* marked_bytes,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	4608 BitMap* card_bm,
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4609 CMTaskQueue* task_queue,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4610 CMTaskQueueSet* task_queues)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4611 : _g1h(G1CollectedHeap::heap()),
6862 8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark johnc parents: 6812 diff changeset	4612 _worker_id(worker_id), _cm(cm),
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4613 _claimed(false),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4614 _nextMarkBitMap(NULL), _hash_seed(17),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4615 _task_queue(task_queue),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4616 _task_queues(task_queues),
3771 842b840e67db 7046558: G1: concurrent marking optimizations tonyp parents: 3378 diff changeset	4617 _cm_oop_closure(NULL),
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	4618 _marked_bytes_array(marked_bytes),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4830 diff changeset	4619 _card_bm(card_bm) {
1023 11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4620 guarantee(task_queue != NULL, "invariant");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking tonyp parents: 1022 diff changeset	4621 guarantee(task_queues != NULL, "invariant");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4622
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4623 statsOnly( _clock_due_to_scanning = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4624 _clock_due_to_marking = 0 );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4625
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4626 _marking_step_diffs_ms.add(0.5);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4627 }
2435 371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4628
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4629 // 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	4630 // 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	4631 // 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	4632 // 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	4633 // 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	4634 // 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	4635
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4636 // 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	4637 // 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	4638 #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	4639
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4640 #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	4641 #ifdef _LP64
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4642 #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	4643 #else // _LP64
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4644 #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	4645 #endif // _LP64
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4646
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4647 // 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	4648 #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	4649 #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	4650 #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	4651 #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	4652 #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	4653 #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	4654
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4655 // 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	4656 #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	4657 #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	4658 #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	4659 #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	4660
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4661 G1PrintRegionLivenessInfoClosure::
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4662 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	4663 : _out(out),
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4664 _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	4665 _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	4666 _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	4667 _hum_prev_live_bytes(0), _hum_next_live_bytes(0),
12080 5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4668 _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	4669 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	4670 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	4671 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	4672 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	4673
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4674 // 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	4675 _out->cr();
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4676 _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	4677 _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	4678 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	4679 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	4680 G1PPRL_SUM_BYTE_FORMAT("region-size"),
17937 78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang drchase parents: 17844 diff changeset	4681 p2i(g1_committed.start()), p2i(g1_committed.end()),
78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang drchase parents: 17844 diff changeset	4682 p2i(g1_reserved.start()), p2i(g1_reserved.end()),
3986 65a8ff39a6da 7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t johnc parents: 3979 diff changeset	4683 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	4684 _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	4685 _out->print_cr(G1PPRL_LINE_PREFIX
10290 05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4686 G1PPRL_TYPE_H_FORMAT
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4687 G1PPRL_ADDR_BASE_H_FORMAT
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4688 G1PPRL_BYTE_H_FORMAT
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4689 G1PPRL_BYTE_H_FORMAT
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4690 G1PPRL_BYTE_H_FORMAT
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4691 G1PPRL_DOUBLE_H_FORMAT
12080 5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4692 G1PPRL_BYTE_H_FORMAT
10290 05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4693 G1PPRL_BYTE_H_FORMAT,
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4694 "type", "address-range",
12080 5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4695 "used", "prev-live", "next-live", "gc-eff",
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4696 "remset", "code-roots");
3977 5cc33133bc6d 7092245: G1: Wrong format specifier in G1PrintRegionLivenessInfo header output johnc parents: 3975 diff changeset	4697 _out->print_cr(G1PPRL_LINE_PREFIX
10290 05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4698 G1PPRL_TYPE_H_FORMAT
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4699 G1PPRL_ADDR_BASE_H_FORMAT
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4700 G1PPRL_BYTE_H_FORMAT
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4701 G1PPRL_BYTE_H_FORMAT
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4702 G1PPRL_BYTE_H_FORMAT
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4703 G1PPRL_DOUBLE_H_FORMAT
12080 5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4704 G1PPRL_BYTE_H_FORMAT
10290 05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4705 G1PPRL_BYTE_H_FORMAT,
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4706 "", "",
12080 5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4707 "(bytes)", "(bytes)", "(bytes)", "(bytes/ms)",
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4708 "(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	4709 }
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4710
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4711 // 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	4712 // 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	4713 // 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	4714 // 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	4715 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	4716 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	4717 // 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	4718 // 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	4719 if (*hum_bytes > 0) {
3986 65a8ff39a6da 7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t johnc parents: 3979 diff changeset	4720 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	4721 *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	4722 }
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4723 return bytes;
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4724 }
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4725
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4726 // 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	4727 // 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	4728 // 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	4729 // 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	4730 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	4731 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	4732 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	4733 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	4734 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	4735 *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	4736 *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	4737 *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	4738 *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	4739 }
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4740
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4741 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	4742 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	4743 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	4744 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	4745 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	4746 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	4747 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	4748 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	4749 double gc_eff = r->gc_efficiency();
10290 05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4750 size_t remset_bytes = r->rem_set()->mem_size();
12080 5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4751 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	4752
2435 371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4753 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	4754 type = "FREE";
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4755 } 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	4756 type = "SURV";
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4757 } 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	4758 type = "EDEN";
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4759 } 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	4760 type = "HUMS";
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4761
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4762 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	4763 _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	4764 "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	4765 // 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	4766 _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	4767 _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	4768 _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	4769 _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	4770 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	4771 &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	4772 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	4773 } 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	4774 type = "HUMC";
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4775 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	4776 &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	4777 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	4778 } else {
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4779 type = "OLD";
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4780 }
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4781
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4782 _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	4783 _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	4784 _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	4785 _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	4786 _total_remset_bytes += remset_bytes;
12080 5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4787 _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	4788
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4789 // 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	4790 _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	4791 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	4792 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	4793 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	4794 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	4795 G1PPRL_BYTE_FORMAT
10290 05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4796 G1PPRL_DOUBLE_FORMAT
12080 5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4797 G1PPRL_BYTE_FORMAT
10290 05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4798 G1PPRL_BYTE_FORMAT,
17937 78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang drchase parents: 17844 diff changeset	4799 type, p2i(bottom), p2i(end),
12080 5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4800 used_bytes, prev_live_bytes, next_live_bytes, gc_eff,
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4801 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	4802
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4803 return false;
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4804 }
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4805
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4806 G1PrintRegionLivenessInfoClosure::~G1PrintRegionLivenessInfoClosure() {
10290 05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo tschatzl parents: 10186 diff changeset	4807 // 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	4808 _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	4809 // 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	4810 _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	4811 _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	4812 " SUMMARY"
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4813 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	4814 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	4815 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	4816 G1PPRL_SUM_MB_PERC_FORMAT("next-live")
12080 5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4817 G1PPRL_SUM_MB_FORMAT("remset")
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4818 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	4819 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	4820 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	4821 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	4822 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	4823 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	4824 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	4825 perc(_total_next_live_bytes, _total_capacity_bytes),
12080 5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4826 bytes_to_mb(_total_remset_bytes),
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 10405 diff changeset	4827 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	4828 _out->cr();
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2369 diff changeset	4829 }

Mercurial > hg > truffle

annotate src/share/vm/gc_implementation/g1/concurrentMark.cpp @ 20292:5d7a63aee595