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annotate src/share/vm/gc_implementation/g1/concurrentMark.cpp @ 20221:ab5fbf410512

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8043722: Swapped usage of idx_t and bm_word_t types in parMarkBitMap.cpp Summary: Clean up usage of idx_t and uintptr_t when using it in conjunction with BitMap::set_map(), casting to the appropriate type. Fixes compilation on S390. Reviewed-by: tschatzl Contributed-by: Dan Horak <dhorak@redhat.com>
author tschatzl
date Mon, 21 Jul 2014 09:40:19 +0200
parents c49dcaf78a65
children 4dfab3faf5e7
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1 /*
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2 * Copyright (c) 2001, 2014, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 *
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23 */
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24
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25 #include "precompiled.hpp"
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26 #include "classfile/symbolTable.hpp"
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27 #include "gc_implementation/g1/concurrentMark.inline.hpp"
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28 #include "gc_implementation/g1/concurrentMarkThread.inline.hpp"
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29 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
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30 #include "gc_implementation/g1/g1CollectorPolicy.hpp"
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31 #include "gc_implementation/g1/g1ErgoVerbose.hpp"
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32 #include "gc_implementation/g1/g1Log.hpp"
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33 #include "gc_implementation/g1/g1OopClosures.inline.hpp"
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34 #include "gc_implementation/g1/g1RemSet.hpp"
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35 #include "gc_implementation/g1/heapRegion.inline.hpp"
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36 #include "gc_implementation/g1/heapRegionRemSet.hpp"
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37 #include "gc_implementation/g1/heapRegionSeq.inline.hpp"
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38 #include "gc_implementation/shared/vmGCOperations.hpp"
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39 #include "gc_implementation/shared/gcTimer.hpp"
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40 #include "gc_implementation/shared/gcTrace.hpp"
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41 #include "gc_implementation/shared/gcTraceTime.hpp"
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42 #include "memory/genOopClosures.inline.hpp"
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43 #include "memory/referencePolicy.hpp"
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44 #include "memory/resourceArea.hpp"
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45 #include "oops/oop.inline.hpp"
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46 #include "runtime/handles.inline.hpp"
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47 #include "runtime/java.hpp"
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48 #include "runtime/prefetch.inline.hpp"
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49 #include "services/memTracker.hpp"
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50
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51 // Concurrent marking bit map wrapper
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52
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53 CMBitMapRO::CMBitMapRO(int shifter) :
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54 _bm(),
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55 _shifter(shifter) {
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56 _bmStartWord = 0;
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57 _bmWordSize = 0;
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58 }
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59
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60 HeapWord* CMBitMapRO::getNextMarkedWordAddress(HeapWord* addr,
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61 HeapWord* limit) const {
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62 // First we must round addr *up* to a possible object boundary.
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63 addr = (HeapWord*)align_size_up((intptr_t)addr,
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64 HeapWordSize << _shifter);
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65 size_t addrOffset = heapWordToOffset(addr);
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66 if (limit == NULL) {
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67 limit = _bmStartWord + _bmWordSize;
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68 }
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69 size_t limitOffset = heapWordToOffset(limit);
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70 size_t nextOffset = _bm.get_next_one_offset(addrOffset, limitOffset);
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71 HeapWord* nextAddr = offsetToHeapWord(nextOffset);
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72 assert(nextAddr >= addr, "get_next_one postcondition");
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73 assert(nextAddr == limit || isMarked(nextAddr),
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74 "get_next_one postcondition");
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75 return nextAddr;
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76 }
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77
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78 HeapWord* CMBitMapRO::getNextUnmarkedWordAddress(HeapWord* addr,
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79 HeapWord* limit) const {
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80 size_t addrOffset = heapWordToOffset(addr);
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81 if (limit == NULL) {
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82 limit = _bmStartWord + _bmWordSize;
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83 }
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84 size_t limitOffset = heapWordToOffset(limit);
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85 size_t nextOffset = _bm.get_next_zero_offset(addrOffset, limitOffset);
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86 HeapWord* nextAddr = offsetToHeapWord(nextOffset);
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87 assert(nextAddr >= addr, "get_next_one postcondition");
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88 assert(nextAddr == limit || !isMarked(nextAddr),
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89 "get_next_one postcondition");
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90 return nextAddr;
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91 }
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92
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93 int CMBitMapRO::heapWordDiffToOffsetDiff(size_t diff) const {
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94 assert((diff & ((1 << _shifter) - 1)) == 0, "argument check");
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95 return (int) (diff >> _shifter);
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96 }
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97
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98 #ifndef PRODUCT
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99 bool CMBitMapRO::covers(ReservedSpace heap_rs) const {
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100 // assert(_bm.map() == _virtual_space.low(), "map inconsistency");
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101 assert(((size_t)_bm.size() * ((size_t)1 << _shifter)) == _bmWordSize,
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102 "size inconsistency");
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103 return _bmStartWord == (HeapWord*)(heap_rs.base()) &&
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104 _bmWordSize == heap_rs.size()>>LogHeapWordSize;
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105 }
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106 #endif
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107
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108 void CMBitMapRO::print_on_error(outputStream* st, const char* prefix) const {
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109 _bm.print_on_error(st, prefix);
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110 }
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111
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112 bool CMBitMap::allocate(ReservedSpace heap_rs) {
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113 _bmStartWord = (HeapWord*)(heap_rs.base());
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114 _bmWordSize = heap_rs.size()/HeapWordSize; // heap_rs.size() is in bytes
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115 ReservedSpace brs(ReservedSpace::allocation_align_size_up(
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116 (_bmWordSize >> (_shifter + LogBitsPerByte)) + 1));
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117 if (!brs.is_reserved()) {
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118 warning("ConcurrentMark marking bit map allocation failure");
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119 return false;
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120 }
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121 MemTracker::record_virtual_memory_type((address)brs.base(), mtGC);
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122 // For now we'll just commit all of the bit map up front.
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123 // Later on we'll try to be more parsimonious with swap.
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124 if (!_virtual_space.initialize(brs, brs.size())) {
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125 warning("ConcurrentMark marking bit map backing store failure");
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126 return false;
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127 }
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128 assert(_virtual_space.committed_size() == brs.size(),
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129 "didn't reserve backing store for all of concurrent marking bit map?");
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130 _bm.set_map((BitMap::bm_word_t*)_virtual_space.low());
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131 assert(_virtual_space.committed_size() << (_shifter + LogBitsPerByte) >=
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132 _bmWordSize, "inconsistency in bit map sizing");
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133 _bm.set_size(_bmWordSize >> _shifter);
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134 return true;
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135 }
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136
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137 void CMBitMap::clearAll() {
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138 _bm.clear();
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139 return;
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140 }
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141
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142 void CMBitMap::markRange(MemRegion mr) {
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143 mr.intersection(MemRegion(_bmStartWord, _bmWordSize));
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144 assert(!mr.is_empty(), "unexpected empty region");
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145 assert((offsetToHeapWord(heapWordToOffset(mr.end())) ==
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146 ((HeapWord *) mr.end())),
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147 "markRange memory region end is not card aligned");
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148 // convert address range into offset range
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149 _bm.at_put_range(heapWordToOffset(mr.start()),
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150 heapWordToOffset(mr.end()), true);
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151 }
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152
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153 void CMBitMap::clearRange(MemRegion mr) {
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154 mr.intersection(MemRegion(_bmStartWord, _bmWordSize));
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155 assert(!mr.is_empty(), "unexpected empty region");
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156 // convert address range into offset range
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157 _bm.at_put_range(heapWordToOffset(mr.start()),
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158 heapWordToOffset(mr.end()), false);
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159 }
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160
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161 MemRegion CMBitMap::getAndClearMarkedRegion(HeapWord* addr,
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162 HeapWord* end_addr) {
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163 HeapWord* start = getNextMarkedWordAddress(addr);
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164 start = MIN2(start, end_addr);
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165 HeapWord* end = getNextUnmarkedWordAddress(start);
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166 end = MIN2(end, end_addr);
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167 assert(start <= end, "Consistency check");
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168 MemRegion mr(start, end);
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169 if (!mr.is_empty()) {
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170 clearRange(mr);
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171 }
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172 return mr;
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173 }
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174
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175 CMMarkStack::CMMarkStack(ConcurrentMark* cm) :
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176 _base(NULL), _cm(cm)
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177 #ifdef ASSERT
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178 , _drain_in_progress(false)
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179 , _drain_in_progress_yields(false)
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180 #endif
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181 {}
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182
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183 bool CMMarkStack::allocate(size_t capacity) {
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184 // allocate a stack of the requisite depth
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185 ReservedSpace rs(ReservedSpace::allocation_align_size_up(capacity * sizeof(oop)));
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186 if (!rs.is_reserved()) {
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187 warning("ConcurrentMark MarkStack allocation failure");
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188 return false;
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189 }
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190 MemTracker::record_virtual_memory_type((address)rs.base(), mtGC);
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191 if (!_virtual_space.initialize(rs, rs.size())) {
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192 warning("ConcurrentMark MarkStack backing store failure");
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193 // Release the virtual memory reserved for the marking stack
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194 rs.release();
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195 return false;
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196 }
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197 assert(_virtual_space.committed_size() == rs.size(),
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198 "Didn't reserve backing store for all of ConcurrentMark stack?");
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199 _base = (oop*) _virtual_space.low();
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200 setEmpty();
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201 _capacity = (jint) capacity;
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202 _saved_index = -1;
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203 _should_expand = false;
342
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204 NOT_PRODUCT(_max_depth = 0);
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205 return true;
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206 }
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207
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208 void CMMarkStack::expand() {
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209 // Called, during remark, if we've overflown the marking stack during marking.
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210 assert(isEmpty(), "stack should been emptied while handling overflow");
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211 assert(_capacity <= (jint) MarkStackSizeMax, "stack bigger than permitted");
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212 // Clear expansion flag
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213 _should_expand = false;
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214 if (_capacity == (jint) MarkStackSizeMax) {
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215 if (PrintGCDetails && Verbose) {
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216 gclog_or_tty->print_cr(" (benign) Can't expand marking stack capacity, at max size limit");
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217 }
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218 return;
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219 }
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220 // Double capacity if possible
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221 jint new_capacity = MIN2(_capacity*2, (jint) MarkStackSizeMax);
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222 // Do not give up existing stack until we have managed to
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223 // get the double capacity that we desired.
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224 ReservedSpace rs(ReservedSpace::allocation_align_size_up(new_capacity *
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225 sizeof(oop)));
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226 if (rs.is_reserved()) {
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227 // Release the backing store associated with old stack
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228 _virtual_space.release();
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229 // Reinitialize virtual space for new stack
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230 if (!_virtual_space.initialize(rs, rs.size())) {
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231 fatal("Not enough swap for expanded marking stack capacity");
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232 }
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233 _base = (oop*)(_virtual_space.low());
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234 _index = 0;
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235 _capacity = new_capacity;
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236 } else {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
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237 if (PrintGCDetails && Verbose) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
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238 // Failed to double capacity, continue;
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239 gclog_or_tty->print(" (benign) Failed to expand marking stack capacity from "
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240 SIZE_FORMAT"K to " SIZE_FORMAT"K",
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
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diff changeset
241 _capacity / K, new_capacity / K);
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242 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
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243 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
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244 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
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245
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
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246 void CMMarkStack::set_should_expand() {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
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247 // If we're resetting the marking state because of an
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
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248 // marking stack overflow, record that we should, if
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
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249 // possible, expand the stack.
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
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250 _should_expand = _cm->has_overflown();
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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251 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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252
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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253 CMMarkStack::~CMMarkStack() {
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
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254 if (_base != NULL) {
7397
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255 _base = NULL;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
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256 _virtual_space.release();
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
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diff changeset
257 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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258 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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259
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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260 void CMMarkStack::par_push(oop ptr) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
diff changeset
261 while (true) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
diff changeset
262 if (isFull()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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263 _overflow = true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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264 return;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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265 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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266 // Otherwise...
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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267 jint index = _index;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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268 jint next_index = index+1;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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269 jint res = Atomic::cmpxchg(next_index, &_index, index);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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270 if (res == index) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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271 _base[index] = ptr;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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272 // Note that we don't maintain this atomically. We could, but it
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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273 // doesn't seem necessary.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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274 NOT_PRODUCT(_max_depth = MAX2(_max_depth, next_index));
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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275 return;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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276 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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277 // Otherwise, we need to try again.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
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278 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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279 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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280
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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281 void CMMarkStack::par_adjoin_arr(oop* ptr_arr, int n) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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282 while (true) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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diff changeset
283 if (isFull()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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284 _overflow = true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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285 return;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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286 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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287 // Otherwise...
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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288 jint index = _index;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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289 jint next_index = index + n;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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diff changeset
290 if (next_index > _capacity) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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291 _overflow = true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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diff changeset
292 return;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
diff changeset
293 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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294 jint res = Atomic::cmpxchg(next_index, &_index, index);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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295 if (res == index) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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296 for (int i = 0; i < n; i++) {
7397
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297 int ind = index + i;
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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298 assert(ind < _capacity, "By overflow test above.");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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299 _base[ind] = ptr_arr[i];
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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300 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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301 NOT_PRODUCT(_max_depth = MAX2(_max_depth, next_index));
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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302 return;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
diff changeset
303 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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diff changeset
304 // Otherwise, we need to try again.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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305 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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306 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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diff changeset
307
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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308 void CMMarkStack::par_push_arr(oop* ptr_arr, int n) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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309 MutexLockerEx x(ParGCRareEvent_lock, Mutex::_no_safepoint_check_flag);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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310 jint start = _index;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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311 jint next_index = start + n;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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diff changeset
312 if (next_index > _capacity) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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313 _overflow = true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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314 return;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
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315 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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316 // Otherwise.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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317 _index = next_index;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
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318 for (int i = 0; i < n; i++) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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319 int ind = start + i;
1023
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
320 assert(ind < _capacity, "By overflow test above.");
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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321 _base[ind] = ptr_arr[i];
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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322 }
7397
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 6865
diff changeset
323 NOT_PRODUCT(_max_depth = MAX2(_max_depth, next_index));
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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324 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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325
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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326 bool CMMarkStack::par_pop_arr(oop* ptr_arr, int max, int* n) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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327 MutexLockerEx x(ParGCRareEvent_lock, Mutex::_no_safepoint_check_flag);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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328 jint index = _index;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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329 if (index == 0) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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330 *n = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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331 return false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
diff changeset
332 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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333 int k = MIN2(max, index);
7397
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 6865
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334 jint new_ind = index - k;
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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335 for (int j = 0; j < k; j++) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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336 ptr_arr[j] = _base[new_ind + j];
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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337 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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338 _index = new_ind;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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339 *n = k;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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340 return true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
diff changeset
341 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
diff changeset
342 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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343
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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344 template<class OopClosureClass>
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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345 bool CMMarkStack::drain(OopClosureClass* cl, CMBitMap* bm, bool yield_after) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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346 assert(!_drain_in_progress || !_drain_in_progress_yields || yield_after
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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347 || SafepointSynchronize::is_at_safepoint(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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348 "Drain recursion must be yield-safe.");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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349 bool res = true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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350 debug_only(_drain_in_progress = true);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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351 debug_only(_drain_in_progress_yields = yield_after);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
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352 while (!isEmpty()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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353 oop newOop = pop();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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354 assert(G1CollectedHeap::heap()->is_in_reserved(newOop), "Bad pop");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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355 assert(newOop->is_oop(), "Expected an oop");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
diff changeset
356 assert(bm == NULL || bm->isMarked((HeapWord*)newOop),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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357 "only grey objects on this stack");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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358 newOop->oop_iterate(cl);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
diff changeset
359 if (yield_after && _cm->do_yield_check()) {
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
360 res = false;
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
361 break;
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
diff changeset
362 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
diff changeset
363 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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diff changeset
364 debug_only(_drain_in_progress = false);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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365 return res;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
diff changeset
366 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
diff changeset
367
4787
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
368 void CMMarkStack::note_start_of_gc() {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
369 assert(_saved_index == -1,
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
370 "note_start_of_gc()/end_of_gc() bracketed incorrectly");
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
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diff changeset
371 _saved_index = _index;
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
372 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
373
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
374 void CMMarkStack::note_end_of_gc() {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
375 // 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
376 // 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
377 // 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
378 // 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
379 // issue in any way.
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
380 guarantee(_saved_index == _index,
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
381 err_msg("saved index: %d index: %d", _saved_index, _index));
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
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382 _saved_index = -1;
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
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diff changeset
383 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
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diff changeset
384
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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385 void CMMarkStack::oops_do(OopClosure* f) {
4787
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
386 assert(_saved_index == _index,
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
387 err_msg("saved index: %d index: %d", _saved_index, _index));
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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diff changeset
388 for (int i = 0; i < _index; i += 1) {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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389 f->do_oop(&_base[i]);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
diff changeset
390 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
diff changeset
391 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
diff changeset
392
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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diff changeset
393 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
394 return _g1h->is_obj_ill(obj);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
diff changeset
395 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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diff changeset
396
4837
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397 CMRootRegions::CMRootRegions() :
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tonyp
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398 _young_list(NULL), _cm(NULL), _scan_in_progress(false),
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tonyp
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399 _should_abort(false), _next_survivor(NULL) { }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
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diff changeset
400
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
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diff changeset
401 void CMRootRegions::init(G1CollectedHeap* g1h, ConcurrentMark* cm) {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
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diff changeset
402 _young_list = g1h->young_list();
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tonyp
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diff changeset
403 _cm = cm;
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
404 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
405
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
406 void CMRootRegions::prepare_for_scan() {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
407 assert(!scan_in_progress(), "pre-condition");
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
408
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
409 // Currently, only survivors can be root regions.
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
410 assert(_next_survivor == NULL, "pre-condition");
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
411 _next_survivor = _young_list->first_survivor_region();
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
412 _scan_in_progress = (_next_survivor != NULL);
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
413 _should_abort = false;
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
414 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
415
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
416 HeapRegion* CMRootRegions::claim_next() {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
417 if (_should_abort) {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
418 // 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
419 // force the caller to bail out of their loop.
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
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diff changeset
420 return NULL;
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
421 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
422
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
423 // Currently, only survivors can be root regions.
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
424 HeapRegion* res = _next_survivor;
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
425 if (res != NULL) {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
426 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
427 // 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
428 res = _next_survivor;
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
429 if (res != NULL) {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
430 if (res == _young_list->last_survivor_region()) {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
431 // 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
432 // that we're done.
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
433 _next_survivor = NULL;
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
434 } else {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
435 _next_survivor = res->get_next_young_region();
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
436 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
437 } else {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
438 // 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
439 // 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
440 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
441 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
442 assert(res == NULL || res->is_survivor(), "post-condition");
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 return res;
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
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
447 void CMRootRegions::scan_finished() {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
448 assert(scan_in_progress(), "pre-condition");
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
449
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
450 // Currently, only survivors can be root regions.
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
451 if (!_should_abort) {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
452 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
453 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
454 _next_survivor = NULL;
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 {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
457 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
458 _scan_in_progress = false;
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
459 RootRegionScan_lock->notify_all();
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
460 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
461 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
462
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
463 bool CMRootRegions::wait_until_scan_finished() {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
464 if (!scan_in_progress()) return false;
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
465
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
466 {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
467 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
468 while (scan_in_progress()) {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
469 RootRegionScan_lock->wait(Mutex::_no_safepoint_check_flag);
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
470 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
471 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
472 return true;
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
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
475 #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
476 #pragma warning( disable:4355 ) // 'this' : used in base member initializer list
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
477 #endif // _MSC_VER
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
478
4728
441e946dc1af 7121618: Change type of number of GC workers to unsigned int.
jmasa
parents: 4711
diff changeset
479 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
480 return MAX2((n_par_threads + 2) / 4, 1U);
4095
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents: 4093
diff changeset
481 }
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents: 4093
diff changeset
482
7397
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 6865
diff changeset
483 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
484 _g1h(g1h),
12229
ff218fdb30ba 8021823: G1: Concurrent marking crashes with -XX:ObjectAlignmentInBytes>=32 in 64bit VMs
tschatzl
parents: 12080
diff changeset
485 _markBitMap1(log2_intptr(MinObjAlignment)),
ff218fdb30ba 8021823: G1: Concurrent marking crashes with -XX:ObjectAlignmentInBytes>=32 in 64bit VMs
tschatzl
parents: 12080
diff changeset
486 _markBitMap2(log2_intptr(MinObjAlignment)),
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
487 _parallel_marking_threads(0),
4095
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents: 4093
diff changeset
488 _max_parallel_marking_threads(0),
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
489 _sleep_factor(0.0),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
490 _marking_task_overhead(1.0),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
491 _cleanup_sleep_factor(0.0),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
492 _cleanup_task_overhead(1.0),
2152
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
493 _cleanup_list("Cleanup List"),
7397
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 6865
diff changeset
494 _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
495 _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
496 CardTableModRefBS::card_shift,
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 6865
diff changeset
497 false /* in_resource_area*/),
4836
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
498
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
499 _prevMarkBitMap(&_markBitMap1),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
500 _nextMarkBitMap(&_markBitMap2),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
501
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
502 _markStack(this),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
503 // _finger set in set_non_marking_state
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
504
6862
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 6812
diff changeset
505 _max_worker_id(MAX2((uint)ParallelGCThreads, 1U)),
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
506 // _active_tasks set in set_non_marking_state
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
507 // _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
508 _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
509 _terminator(ParallelTaskTerminator((int) _max_worker_id, _task_queues)),
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
510
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
511 _has_overflown(false),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
512 _concurrent(false),
619
7ea5ca260b28 6814467: G1: small fixes related to concurrent marking verboseness
tonyp
parents: 470
diff changeset
513 _has_aborted(false),
20190
0982ec23da03 8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents: 17950
diff changeset
514 _aborted_gc_id(GCId::undefined()),
619
7ea5ca260b28 6814467: G1: small fixes related to concurrent marking verboseness
tonyp
parents: 470
diff changeset
515 _restart_for_overflow(false),
7ea5ca260b28 6814467: G1: small fixes related to concurrent marking verboseness
tonyp
parents: 470
diff changeset
516 _concurrent_marking_in_progress(false),
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
517
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
518 // _verbose_level set below
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 _init_times(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
521 _remark_times(), _remark_mark_times(), _remark_weak_ref_times(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
522 _cleanup_times(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
523 _total_counting_time(0.0),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
524 _total_rs_scrub_time(0.0),
4836
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
525
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
526 _parallel_workers(NULL),
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 _count_card_bitmaps(NULL),
7397
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 6865
diff changeset
529 _count_marked_bytes(NULL),
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 6865
diff changeset
530 _completed_initialization(false) {
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
531 CMVerboseLevel verbose_level = (CMVerboseLevel) G1MarkingVerboseLevel;
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
532 if (verbose_level < no_verbose) {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
533 verbose_level = no_verbose;
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
534 }
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
535 if (verbose_level > high_verbose) {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
536 verbose_level = high_verbose;
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
537 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
538 _verbose_level = verbose_level;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
539
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
540 if (verbose_low()) {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
541 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
542 "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
543 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
544
7397
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 6865
diff changeset
545 if (!_markBitMap1.allocate(heap_rs)) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 6865
diff changeset
546 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
547 return;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 6865
diff changeset
548 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 6865
diff changeset
549 if (!_markBitMap2.allocate(heap_rs)) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 6865
diff changeset
550 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
551 return;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 6865
diff changeset
552 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
553
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
554 // Create & start a ConcurrentMark thread.
845
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents: 831
diff changeset
555 _cmThread = new ConcurrentMarkThread(this);
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents: 831
diff changeset
556 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
557 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
558 if (_cmThread->osthread() == NULL) {
1de8e5356754 8029326: G1 does not check if threads gets created
ehelin
parents: 12316
diff changeset
559 vm_shutdown_during_initialization("Could not create ConcurrentMarkThread");
1de8e5356754 8029326: G1 does not check if threads gets created
ehelin
parents: 12316
diff changeset
560 }
845
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents: 831
diff changeset
561
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
562 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
563 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
564 assert(_markBitMap2.covers(heap_rs), "_markBitMap2 inconsistency");
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
565
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
566 SATBMarkQueueSet& satb_qs = JavaThread::satb_mark_queue_set();
1282
b81f3572f355 6928059: G1: command line parameter renaming
tonyp
parents: 1111
diff changeset
567 satb_qs.set_buffer_size(G1SATBBufferSize);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
568
4837
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
569 _root_regions.init(_g1h, this);
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
570
1284
5f1f51edaff6 6928081: G1: rename parameters common with CMS
jmasa
parents: 1282
diff changeset
571 if (ConcGCThreads > ParallelGCThreads) {
17937
78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents: 17844
diff changeset
572 warning("Can't have more ConcGCThreads (" UINTX_FORMAT ") "
78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents: 17844
diff changeset
573 "than ParallelGCThreads (" UINTX_FORMAT ").",
7397
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 6865
diff changeset
574 ConcGCThreads, ParallelGCThreads);
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 6865
diff changeset
575 return;
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
576 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
577 if (ParallelGCThreads == 0) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
578 // 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
579 // spawn any marking threads either
4095
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents: 4093
diff changeset
580 _parallel_marking_threads = 0;
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents: 4093
diff changeset
581 _max_parallel_marking_threads = 0;
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents: 4093
diff changeset
582 _sleep_factor = 0.0;
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents: 4093
diff changeset
583 _marking_task_overhead = 1.0;
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
584 } else {
8006
4700e77d44c1 8006894: G1: Number of marking threads missing from PrintFlagsFinal output
johnc
parents: 7450
diff changeset
585 if (!FLAG_IS_DEFAULT(ConcGCThreads) && ConcGCThreads > 0) {
4700e77d44c1 8006894: G1: Number of marking threads missing from PrintFlagsFinal output
johnc
parents: 7450
diff changeset
586 // Note: ConcGCThreads has precedence over G1MarkingOverheadPercent
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
587 // if both are set
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
588 _sleep_factor = 0.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
589 _marking_task_overhead = 1.0;
751
20c6f43950b5 6490395: G1: Tidy up command line flags.
johnc
parents: 647
diff changeset
590 } else if (G1MarkingOverheadPercent > 0) {
8006
4700e77d44c1 8006894: G1: Number of marking threads missing from PrintFlagsFinal output
johnc
parents: 7450
diff changeset
591 // 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
592 // 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
593 double marking_overhead = (double) G1MarkingOverheadPercent / 100.0;
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
594 double overall_cm_overhead =
751
20c6f43950b5 6490395: G1: Tidy up command line flags.
johnc
parents: 647
diff changeset
595 (double) MaxGCPauseMillis * marking_overhead /
20c6f43950b5 6490395: G1: Tidy up command line flags.
johnc
parents: 647
diff changeset
596 (double) GCPauseIntervalMillis;
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
597 double cpu_ratio = 1.0 / (double) os::processor_count();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
598 double marking_thread_num = ceil(overall_cm_overhead / cpu_ratio);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
599 double marking_task_overhead =
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
600 overall_cm_overhead / marking_thread_num *
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
601 (double) os::processor_count();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
602 double sleep_factor =
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
603 (1.0 - marking_task_overhead) / marking_task_overhead;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
604
8006
4700e77d44c1 8006894: G1: Number of marking threads missing from PrintFlagsFinal output
johnc
parents: 7450
diff changeset
605 FLAG_SET_ERGO(uintx, ConcGCThreads, (uint) marking_thread_num);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
606 _sleep_factor = sleep_factor;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
607 _marking_task_overhead = marking_task_overhead;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
608 } else {
8006
4700e77d44c1 8006894: G1: Number of marking threads missing from PrintFlagsFinal output
johnc
parents: 7450
diff changeset
609 // 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
610 // the number of parallel GC threads.
4700e77d44c1 8006894: G1: Number of marking threads missing from PrintFlagsFinal output
johnc
parents: 7450
diff changeset
611 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
612 FLAG_SET_ERGO(uintx, ConcGCThreads, marking_thread_num);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
613 _sleep_factor = 0.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
614 _marking_task_overhead = 1.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
615 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
616
8006
4700e77d44c1 8006894: G1: Number of marking threads missing from PrintFlagsFinal output
johnc
parents: 7450
diff changeset
617 assert(ConcGCThreads > 0, "Should have been set");
4700e77d44c1 8006894: G1: Number of marking threads missing from PrintFlagsFinal output
johnc
parents: 7450
diff changeset
618 _parallel_marking_threads = (uint) ConcGCThreads;
4700e77d44c1 8006894: G1: Number of marking threads missing from PrintFlagsFinal output
johnc
parents: 7450
diff changeset
619 _max_parallel_marking_threads = _parallel_marking_threads;
4700e77d44c1 8006894: G1: Number of marking threads missing from PrintFlagsFinal output
johnc
parents: 7450
diff changeset
620
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
621 if (parallel_marking_threads() > 1) {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
622 _cleanup_task_overhead = 1.0;
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
623 } else {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
624 _cleanup_task_overhead = marking_task_overhead();
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
625 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
626 _cleanup_sleep_factor =
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
627 (1.0 - cleanup_task_overhead()) / cleanup_task_overhead();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
628
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
629 #if 0
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
630 gclog_or_tty->print_cr("Marking Threads %d", parallel_marking_threads());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
631 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
632 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
633 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
634 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
635 #endif
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
636
1023
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
637 guarantee(parallel_marking_threads() > 0, "peace of mind");
1833
8b10f48633dc 6984287: Regularize how GC parallel workers are specified.
jmasa
parents: 1719
diff changeset
638 _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
639 _max_parallel_marking_threads, false, true);
1833
8b10f48633dc 6984287: Regularize how GC parallel workers are specified.
jmasa
parents: 1719
diff changeset
640 if (_parallel_workers == NULL) {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
641 vm_exit_during_initialization("Failed necessary allocation.");
1833
8b10f48633dc 6984287: Regularize how GC parallel workers are specified.
jmasa
parents: 1719
diff changeset
642 } else {
8b10f48633dc 6984287: Regularize how GC parallel workers are specified.
jmasa
parents: 1719
diff changeset
643 _parallel_workers->initialize_workers();
8b10f48633dc 6984287: Regularize how GC parallel workers are specified.
jmasa
parents: 1719
diff changeset
644 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
645 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
646
7397
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 6865
diff changeset
647 if (FLAG_IS_DEFAULT(MarkStackSize)) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 6865
diff changeset
648 uintx mark_stack_size =
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 6865
diff changeset
649 MIN2(MarkStackSizeMax,
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 6865
diff changeset
650 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
651 // 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
652 // 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
653 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
654 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
655 "must be between " UINTX_FORMAT " and " UINTX_FORMAT,
17937
78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents: 17844
diff changeset
656 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
657 return;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 6865
diff changeset
658 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 6865
diff changeset
659 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
660 } else {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 6865
diff changeset
661 // Verify MarkStackSize is in range.
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 6865
diff changeset
662 if (FLAG_IS_CMDLINE(MarkStackSize)) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 6865
diff changeset
663 if (FLAG_IS_DEFAULT(MarkStackSizeMax)) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 6865
diff changeset
664 if (!(MarkStackSize >= 1 && MarkStackSize <= MarkStackSizeMax)) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 6865
diff changeset
665 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
666 "must be between " UINTX_FORMAT " and " UINTX_FORMAT,
17937
78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents: 17844
diff changeset
667 MarkStackSize, (uintx) 1, MarkStackSizeMax);
7397
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 6865
diff changeset
668 return;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 6865
diff changeset
669 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 6865
diff changeset
670 } 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
671 if (!(MarkStackSize >= 1 && MarkStackSize <= MarkStackSizeMax)) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 6865
diff changeset
672 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
673 " or for MarkStackSizeMax (" UINTX_FORMAT ")",
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 6865
diff changeset
674 MarkStackSize, MarkStackSizeMax);
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 6865
diff changeset
675 return;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 6865
diff changeset
676 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 6865
diff changeset
677 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 6865
diff changeset
678 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 6865
diff changeset
679 }
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 if (!_markStack.allocate(MarkStackSize)) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 6865
diff changeset
682 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
683 return;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 6865
diff changeset
684 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 6865
diff changeset
685
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 6865
diff changeset
686 _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
687 _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
688
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 6865
diff changeset
689 _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
690 _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
691
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 6865
diff changeset
692 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
693
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 6865
diff changeset
694 // 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
695 _active_tasks = _max_worker_id;
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 6865
diff changeset
696
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 6865
diff changeset
697 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
698 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
699 CMTaskQueue* task_queue = new CMTaskQueue();
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 6865
diff changeset
700 task_queue->initialize();
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 6865
diff changeset
701 _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
702
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 6865
diff changeset
703 _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
704 _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
705
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 6865
diff changeset
706 _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
707 _count_marked_bytes[i],
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 6865
diff changeset
708 &_count_card_bitmaps[i],
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 6865
diff changeset
709 task_queue, _task_queues);
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 6865
diff changeset
710
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 6865
diff changeset
711 _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
712 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 6865
diff changeset
713
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 6865
diff changeset
714 // 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
715 // 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
716 _heap_bottom_card_num =
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 6865
diff changeset
717 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
718 CardTableModRefBS::card_shift);
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 6865
diff changeset
719
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 6865
diff changeset
720 // 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
721 clear_all_count_data();
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 6865
diff changeset
722
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
723 // 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
724 _heap_start = (HeapWord*) heap_rs.base();
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
725 set_non_marking_state();
7397
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 6865
diff changeset
726 _completed_initialization = true;
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
727 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
728
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
729 void ConcurrentMark::update_g1_committed(bool force) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
730 // 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
731 // update _heap_end.
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
732 if (!concurrent_marking_in_progress() && !force) return;
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
733
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
734 MemRegion committed = _g1h->g1_committed();
1023
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
735 assert(committed.start() == _heap_start, "start shouldn't change");
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
736 HeapWord* new_end = committed.end();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
737 if (new_end > _heap_end) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
738 // The heap has been expanded.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
739
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
740 _heap_end = new_end;
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 // Notice that the heap can also shrink. However, this only happens
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
743 // during a Full GC (at least currently) and the entire marking
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
744 // 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
745 // do nothing.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
746 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
747
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
748 void ConcurrentMark::reset() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
749 // 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
750 // phase. CM will be notified of any future g1_committed expansions
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
751 // will be at the end of evacuation pauses, when tasks are
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
752 // inactive.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
753 MemRegion committed = _g1h->g1_committed();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
754 _heap_start = committed.start();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
755 _heap_end = committed.end();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
756
1023
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
757 // Separated the asserts so that we know which one fires.
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
758 assert(_heap_start != NULL, "heap bounds should look ok");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
759 assert(_heap_end != NULL, "heap bounds should look ok");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
760 assert(_heap_start < _heap_end, "heap bounds should look ok");
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
761
7450
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes
johnc
parents: 7397
diff changeset
762 // Reset all the marking data structures and any necessary flags
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes
johnc
parents: 7397
diff changeset
763 reset_marking_state();
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
764
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
765 if (verbose_low()) {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
766 gclog_or_tty->print_cr("[global] resetting");
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
767 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
768
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
769 // We do reset all of them, since different phases will use
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
770 // 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
771 // of them ready.
6862
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 6812
diff changeset
772 for (uint i = 0; i < _max_worker_id; ++i) {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
773 _tasks[i]->reset(_nextMarkBitMap);
1835
4805b9f4779e 6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents: 1833
diff changeset
774 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
775
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
776 // 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
777 // pause with initial mark piggy-backed
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
778 set_concurrent_marking_in_progress();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
779 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
780
7450
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes
johnc
parents: 7397
diff changeset
781
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes
johnc
parents: 7397
diff changeset
782 void ConcurrentMark::reset_marking_state(bool clear_overflow) {
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes
johnc
parents: 7397
diff changeset
783 _markStack.set_should_expand();
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes
johnc
parents: 7397
diff changeset
784 _markStack.setEmpty(); // Also clears the _markStack overflow flag
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes
johnc
parents: 7397
diff changeset
785 if (clear_overflow) {
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes
johnc
parents: 7397
diff changeset
786 clear_has_overflown();
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes
johnc
parents: 7397
diff changeset
787 } else {
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes
johnc
parents: 7397
diff changeset
788 assert(has_overflown(), "pre-condition");
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes
johnc
parents: 7397
diff changeset
789 }
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes
johnc
parents: 7397
diff changeset
790 _finger = _heap_start;
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 for (uint i = 0; i < _max_worker_id; ++i) {
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes
johnc
parents: 7397
diff changeset
793 CMTaskQueue* queue = _task_queues->queue(i);
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes
johnc
parents: 7397
diff changeset
794 queue->set_empty();
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes
johnc
parents: 7397
diff changeset
795 }
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes
johnc
parents: 7397
diff changeset
796 }
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes
johnc
parents: 7397
diff changeset
797
8788
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents: 8787
diff changeset
798 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
799 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
800
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
801 _active_tasks = active_tasks;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
802 // Need to update the three data structures below according to the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
803 // number of active threads for this phase.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
804 _terminator = ParallelTaskTerminator((int) active_tasks, _task_queues);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
805 _first_overflow_barrier_sync.set_n_workers((int) active_tasks);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
806 _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
807 }
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents: 8787
diff changeset
808
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents: 8787
diff changeset
809 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
810 set_concurrency(active_tasks);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
811
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
812 _concurrent = concurrent;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
813 // 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
814 for (uint i = 0; i < _max_worker_id; ++i)
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
815 _tasks[i]->set_concurrent(concurrent);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
816
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
817 if (concurrent) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
818 set_concurrent_marking_in_progress();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
819 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
820 // We currently assume that the concurrent flag has been set to
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
821 // 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
822 // in a STW phase.
1023
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
823 assert(!concurrent_marking_in_progress(), "invariant");
17950
8a140676873f 8040804: G1: Concurrent mark stuck in loop calling os::elapsedVTime()
pliden
parents: 17949
diff changeset
824 assert(out_of_regions(),
8788
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents: 8787
diff changeset
825 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
826 p2i(_finger), p2i(_heap_end)));
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
827 update_g1_committed(true);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
828 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
829 }
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 void ConcurrentMark::set_non_marking_state() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
832 // 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
833 // not doing marking.
7450
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes
johnc
parents: 7397
diff changeset
834 reset_marking_state();
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
835 _active_tasks = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
836 clear_concurrent_marking_in_progress();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
837 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
838
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
839 ConcurrentMark::~ConcurrentMark() {
4735
776173fc2df9 7125516: G1: ~ConcurrentMark() frees incorrectly
stefank
parents: 4728
diff changeset
840 // The ConcurrentMark instance is never freed.
776173fc2df9 7125516: G1: ~ConcurrentMark() frees incorrectly
stefank
parents: 4728
diff changeset
841 ShouldNotReachHere();
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
842 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
843
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
844 void ConcurrentMark::clearNextBitmap() {
1359
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1358
diff changeset
845 G1CollectedHeap* g1h = G1CollectedHeap::heap();
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1358
diff changeset
846 G1CollectorPolicy* g1p = g1h->g1_policy();
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1358
diff changeset
847
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1358
diff changeset
848 // 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
849 // the current cycle.
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1358
diff changeset
850 guarantee(cmThread()->during_cycle(), "invariant");
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1358
diff changeset
851
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1358
diff changeset
852 // 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
853 // 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
854 // 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
855 // is the case.
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1358
diff changeset
856 guarantee(!g1h->mark_in_progress(), "invariant");
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1358
diff changeset
857
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1358
diff changeset
858 // 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
859 // 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
860 // each chunk.
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1358
diff changeset
861 HeapWord* start = _nextMarkBitMap->startWord();
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1358
diff changeset
862 HeapWord* end = _nextMarkBitMap->endWord();
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1358
diff changeset
863 HeapWord* cur = start;
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1358
diff changeset
864 size_t chunkSize = M;
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1358
diff changeset
865 while (cur < end) {
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1358
diff changeset
866 HeapWord* next = cur + chunkSize;
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
867 if (next > end) {
1359
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1358
diff changeset
868 next = end;
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
869 }
1359
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1358
diff changeset
870 MemRegion mr(cur,next);
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1358
diff changeset
871 _nextMarkBitMap->clearRange(mr);
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1358
diff changeset
872 cur = next;
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1358
diff changeset
873 do_yield_check();
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1358
diff changeset
874
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1358
diff changeset
875 // 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
876 // 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
877 // 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
878 // clearing to get some checking in the product.
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1358
diff changeset
879 assert(cmThread()->during_cycle(), "invariant");
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1358
diff changeset
880 assert(!g1h->mark_in_progress(), "invariant");
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1358
diff changeset
881 }
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1358
diff changeset
882
4836
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
883 // Clear the liveness counting data
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
884 clear_all_count_data();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
885
1359
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1358
diff changeset
886 // Repeat the asserts from above.
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1358
diff changeset
887 guarantee(cmThread()->during_cycle(), "invariant");
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1358
diff changeset
888 guarantee(!g1h->mark_in_progress(), "invariant");
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
889 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
890
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
891 class NoteStartOfMarkHRClosure: public HeapRegionClosure {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
892 public:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
893 bool doHeapRegion(HeapRegion* r) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
894 if (!r->continuesHumongous()) {
4787
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
895 r->note_start_of_marking();
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
896 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
897 return false;
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 };
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 void ConcurrentMark::checkpointRootsInitialPre() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
902 G1CollectedHeap* g1h = G1CollectedHeap::heap();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
903 G1CollectorPolicy* g1p = g1h->g1_policy();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
904
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
905 _has_aborted = false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
906
1547
fb1a39993f69 6951319: enable solaris builds using Sun Studio 12 update 1
jcoomes
parents: 1388
diff changeset
907 #ifndef PRODUCT
1044
6270f80a7331 6890137: G1: revamp reachable object dump
tonyp
parents: 1030
diff changeset
908 if (G1PrintReachableAtInitialMark) {
1388
7666957bc44d 6937142: G1: improvements to debugging output (S-M)
tonyp
parents: 1359
diff changeset
909 print_reachable("at-cycle-start",
3772
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs
johnc
parents: 3771
diff changeset
910 VerifyOption_G1UsePrevMarking, true /* all */);
1044
6270f80a7331 6890137: G1: revamp reachable object dump
tonyp
parents: 1030
diff changeset
911 }
1547
fb1a39993f69 6951319: enable solaris builds using Sun Studio 12 update 1
jcoomes
parents: 1388
diff changeset
912 #endif
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
913
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
914 // 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
915 reset();
4787
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
916
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
917 // For each region note start of marking.
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
918 NoteStartOfMarkHRClosure startcl;
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
919 g1h->heap_region_iterate(&startcl);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
920 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
921
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 void ConcurrentMark::checkpointRootsInitialPost() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
924 G1CollectedHeap* g1h = G1CollectedHeap::heap();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
925
3316
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents: 2436
diff changeset
926 // 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
927 // 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
928 // 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
929 // 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
930 // 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
931 // 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
932 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
933
3979
4dfb2df418f2 6484982: G1: process references during evacuation pauses
johnc
parents: 3977
diff changeset
934 // Start Concurrent Marking weak-reference discovery.
4dfb2df418f2 6484982: G1: process references during evacuation pauses
johnc
parents: 3977
diff changeset
935 ReferenceProcessor* rp = g1h->ref_processor_cm();
4dfb2df418f2 6484982: G1: process references during evacuation pauses
johnc
parents: 3977
diff changeset
936 // enable ("weak") refs discovery
4dfb2df418f2 6484982: G1: process references during evacuation pauses
johnc
parents: 3977
diff changeset
937 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
938 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
939
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
940 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
941 // 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
942 // 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
943 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
944 false /* expected_active */);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
945
4837
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
946 _root_regions.prepare_for_scan();
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
947
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
948 // 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
949 // 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
950 // 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
951 // during it. No need to call it here.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
952 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
953
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
954 /*
3316
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents: 2436
diff changeset
955 * 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
956 * 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
957 * 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
958 * 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
959 * 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
960 * 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
961 *
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents: 2436
diff changeset
962 * 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
963 * 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
964 * 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
965 * (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
966 * 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
967 *
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents: 2436
diff changeset
968 * 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
969 * 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
970 * 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
971 * 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
972 * 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
973 */
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
974
6862
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 6812
diff changeset
975 void ConcurrentMark::enter_first_sync_barrier(uint worker_id) {
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
976 if (verbose_low()) {
6862
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 6812
diff changeset
977 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
978 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
979
3316
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents: 2436
diff changeset
980 if (concurrent()) {
20192
581e70386ec9 8039147: Cleanup SuspendibleThreadSet
pliden
parents: 20190
diff changeset
981 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
982 }
17949
487f09bf44e0 8040803: G1: Concurrent mark hangs when mark stack overflows
pliden
parents: 17937
diff changeset
983
487f09bf44e0 8040803: G1: Concurrent mark hangs when mark stack overflows
pliden
parents: 17937
diff changeset
984 bool barrier_aborted = !_first_overflow_barrier_sync.enter();
487f09bf44e0 8040803: G1: Concurrent mark hangs when mark stack overflows
pliden
parents: 17937
diff changeset
985
3316
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents: 2436
diff changeset
986 if (concurrent()) {
20192
581e70386ec9 8039147: Cleanup SuspendibleThreadSet
pliden
parents: 20190
diff changeset
987 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
988 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
989 // 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
990 // more work
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
991
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
992 if (verbose_low()) {
17949
487f09bf44e0 8040803: G1: Concurrent mark hangs when mark stack overflows
pliden
parents: 17937
diff changeset
993 if (barrier_aborted) {
487f09bf44e0 8040803: G1: Concurrent mark hangs when mark stack overflows
pliden
parents: 17937
diff changeset
994 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
995 } else {
487f09bf44e0 8040803: G1: Concurrent mark hangs when mark stack overflows
pliden
parents: 17937
diff changeset
996 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
997 }
487f09bf44e0 8040803: G1: Concurrent mark hangs when mark stack overflows
pliden
parents: 17937
diff changeset
998 }
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 if (barrier_aborted) {
487f09bf44e0 8040803: G1: Concurrent mark hangs when mark stack overflows
pliden
parents: 17937
diff changeset
1001 // 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
1002 // 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
1003 return;
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
1004 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1005
8788
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents: 8787
diff changeset
1006 // 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
1007 // 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
1008 // during the remark pause.
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents: 8787
diff changeset
1009 // 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
1010 // 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
1011 // calls.
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents: 8787
diff changeset
1012 if (concurrent()) {
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents: 8787
diff changeset
1013 // 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
1014 if (worker_id == 0) {
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents: 8787
diff changeset
1015 // 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
1016 // 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
1017 // 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
1018 // 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
1019 // marking.
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents: 8787
diff changeset
1020 reset_marking_state(true /* clear_overflow */);
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents: 8787
diff changeset
1021 force_overflow()->update();
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents: 8787
diff changeset
1022
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents: 8787
diff changeset
1023 if (G1Log::fine()) {
20190
0982ec23da03 8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents: 17950
diff changeset
1024 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
1025 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
1026 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1027 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1028 }
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 // after this, each task should reset its own data structures then
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1031 // then go into the second barrier
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1032 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1033
6862
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 6812
diff changeset
1034 void ConcurrentMark::enter_second_sync_barrier(uint worker_id) {
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
1035 if (verbose_low()) {
6862
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 6812
diff changeset
1036 gclog_or_tty->print_cr("[%u] entering second barrier", worker_id);
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
1037 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1038
3316
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents: 2436
diff changeset
1039 if (concurrent()) {
20192
581e70386ec9 8039147: Cleanup SuspendibleThreadSet
pliden
parents: 20190
diff changeset
1040 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
1041 }
17949
487f09bf44e0 8040803: G1: Concurrent mark hangs when mark stack overflows
pliden
parents: 17937
diff changeset
1042
487f09bf44e0 8040803: G1: Concurrent mark hangs when mark stack overflows
pliden
parents: 17937
diff changeset
1043 bool barrier_aborted = !_second_overflow_barrier_sync.enter();
487f09bf44e0 8040803: G1: Concurrent mark hangs when mark stack overflows
pliden
parents: 17937
diff changeset
1044
3316
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents: 2436
diff changeset
1045 if (concurrent()) {
20192
581e70386ec9 8039147: Cleanup SuspendibleThreadSet
pliden
parents: 20190
diff changeset
1046 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
1047 }
8788
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents: 8787
diff changeset
1048 // 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
1049
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
1050 if (verbose_low()) {
17949
487f09bf44e0 8040803: G1: Concurrent mark hangs when mark stack overflows
pliden
parents: 17937
diff changeset
1051 if (barrier_aborted) {
487f09bf44e0 8040803: G1: Concurrent mark hangs when mark stack overflows
pliden
parents: 17937
diff changeset
1052 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
1053 } else {
487f09bf44e0 8040803: G1: Concurrent mark hangs when mark stack overflows
pliden
parents: 17937
diff changeset
1054 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
1055 }
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
1056 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1057 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1058
3316
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents: 2436
diff changeset
1059 #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
1060 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
1061 _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
1062 _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
1063 update();
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents: 2436
diff changeset
1064 }
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents: 2436
diff changeset
1065
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents: 2436
diff changeset
1066 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
1067 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
1068 _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
1069 _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
1070 } else {
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 = false;
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents: 2436
diff changeset
1072 }
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents: 2436
diff changeset
1073 }
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 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
1076 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
1077 _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
1078 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
1079 } else {
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 false;
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents: 2436
diff changeset
1081 }
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents: 2436
diff changeset
1082 }
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents: 2436
diff changeset
1083 #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
1084
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1085 class CMConcurrentMarkingTask: public AbstractGangTask {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1086 private:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1087 ConcurrentMark* _cm;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1088 ConcurrentMarkThread* _cmt;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1089
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1090 public:
4728
441e946dc1af 7121618: Change type of number of GC workers to unsigned int.
jmasa
parents: 4711
diff changeset
1091 void work(uint worker_id) {
1023
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
1092 assert(Thread::current()->is_ConcurrentGC_thread(),
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
1093 "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
1094 ResourceMark rm;
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1095
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1096 double start_vtime = os::elapsedVTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1097
20192
581e70386ec9 8039147: Cleanup SuspendibleThreadSet
pliden
parents: 20190
diff changeset
1098 SuspendibleThreadSet::join();
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1099
4728
441e946dc1af 7121618: Change type of number of GC workers to unsigned int.
jmasa
parents: 4711
diff changeset
1100 assert(worker_id < _cm->active_tasks(), "invariant");
441e946dc1af 7121618: Change type of number of GC workers to unsigned int.
jmasa
parents: 4711
diff changeset
1101 CMTask* the_task = _cm->task(worker_id);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1102 the_task->record_start_time();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1103 if (!_cm->has_aborted()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1104 do {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1105 double start_vtime_sec = os::elapsedVTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1106 double start_time_sec = os::elapsedTime();
2174
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
1107 double mark_step_duration_ms = G1ConcMarkStepDurationMillis;
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
1108
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
1109 the_task->do_marking_step(mark_step_duration_ms,
8787
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
1110 true /* do_termination */,
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
1111 false /* is_serial*/);
2174
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
1112
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1113 double end_time_sec = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1114 double end_vtime_sec = os::elapsedVTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1115 double elapsed_vtime_sec = end_vtime_sec - start_vtime_sec;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1116 double elapsed_time_sec = end_time_sec - start_time_sec;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1117 _cm->clear_has_overflown();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1118
4728
441e946dc1af 7121618: Change type of number of GC workers to unsigned int.
jmasa
parents: 4711
diff changeset
1119 bool ret = _cm->do_yield_check(worker_id);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1120
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1121 jlong sleep_time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1122 if (!_cm->has_aborted() && the_task->has_aborted()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1123 sleep_time_ms =
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1124 (jlong) (elapsed_vtime_sec * _cm->sleep_factor() * 1000.0);
20192
581e70386ec9 8039147: Cleanup SuspendibleThreadSet
pliden
parents: 20190
diff changeset
1125 SuspendibleThreadSet::leave();
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1126 os::sleep(Thread::current(), sleep_time_ms, false);
20192
581e70386ec9 8039147: Cleanup SuspendibleThreadSet
pliden
parents: 20190
diff changeset
1127 SuspendibleThreadSet::join();
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1128 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1129 double end_time2_sec = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1130 double elapsed_time2_sec = end_time2_sec - start_time_sec;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1131
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1132 #if 0
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1133 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
1134 "overhead %1.4lf",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1135 elapsed_vtime_sec * 1000.0, (double) sleep_time_ms,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1136 the_task->conc_overhead(os::elapsedTime()) * 8.0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1137 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
1138 elapsed_time_sec * 1000.0, elapsed_time2_sec * 1000.0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1139 #endif
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1140 } while (!_cm->has_aborted() && the_task->has_aborted());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1141 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1142 the_task->record_end_time();
1023
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
1143 guarantee(!the_task->has_aborted() || _cm->has_aborted(), "invariant");
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1144
20192
581e70386ec9 8039147: Cleanup SuspendibleThreadSet
pliden
parents: 20190
diff changeset
1145 SuspendibleThreadSet::leave();
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1146
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1147 double end_vtime = os::elapsedVTime();
4728
441e946dc1af 7121618: Change type of number of GC workers to unsigned int.
jmasa
parents: 4711
diff changeset
1148 _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
1149 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1150
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1151 CMConcurrentMarkingTask(ConcurrentMark* cm,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1152 ConcurrentMarkThread* cmt) :
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1153 AbstractGangTask("Concurrent Mark"), _cm(cm), _cmt(cmt) { }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1154
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1155 ~CMConcurrentMarkingTask() { }
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
4095
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents: 4093
diff changeset
1158 // Calculates the number of active workers for a concurrent
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents: 4093
diff changeset
1159 // phase.
4728
441e946dc1af 7121618: Change type of number of GC workers to unsigned int.
jmasa
parents: 4711
diff changeset
1160 uint ConcurrentMark::calc_parallel_marking_threads() {
4711
adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken
johnc
parents: 4097
diff changeset
1161 if (G1CollectedHeap::use_parallel_gc_threads()) {
4728
441e946dc1af 7121618: Change type of number of GC workers to unsigned int.
jmasa
parents: 4711
diff changeset
1162 uint n_conc_workers = 0;
4095
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents: 4093
diff changeset
1163 if (!UseDynamicNumberOfGCThreads ||
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents: 4093
diff changeset
1164 (!FLAG_IS_DEFAULT(ConcGCThreads) &&
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents: 4093
diff changeset
1165 !ForceDynamicNumberOfGCThreads)) {
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents: 4093
diff changeset
1166 n_conc_workers = max_parallel_marking_threads();
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents: 4093
diff changeset
1167 } else {
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents: 4093
diff changeset
1168 n_conc_workers =
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents: 4093
diff changeset
1169 AdaptiveSizePolicy::calc_default_active_workers(
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents: 4093
diff changeset
1170 max_parallel_marking_threads(),
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents: 4093
diff changeset
1171 1, /* Minimum workers */
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents: 4093
diff changeset
1172 parallel_marking_threads(),
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents: 4093
diff changeset
1173 Threads::number_of_non_daemon_threads());
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents: 4093
diff changeset
1174 // 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
1175 // 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
1176 }
4711
adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken
johnc
parents: 4097
diff changeset
1177 assert(n_conc_workers > 0, "Always need at least 1");
adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken
johnc
parents: 4097
diff changeset
1178 return n_conc_workers;
4095
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents: 4093
diff changeset
1179 }
4711
adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken
johnc
parents: 4097
diff changeset
1180 // 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
1181 // have spawned any marking threads either. Hence the number of
adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken
johnc
parents: 4097
diff changeset
1182 // concurrent workers should be 0.
adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken
johnc
parents: 4097
diff changeset
1183 return 0;
4095
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents: 4093
diff changeset
1184 }
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents: 4093
diff changeset
1185
4837
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
1186 void ConcurrentMark::scanRootRegion(HeapRegion* hr, uint worker_id) {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
1187 // Currently, only survivors can be root regions.
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
1188 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
1189 G1RootRegionScanClosure cl(_g1h, this, worker_id);
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
1190
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
1191 const uintx interval = PrefetchScanIntervalInBytes;
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
1192 HeapWord* curr = hr->bottom();
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
1193 const HeapWord* end = hr->top();
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
1194 while (curr < end) {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
1195 Prefetch::read(curr, interval);
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
1196 oop obj = oop(curr);
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
1197 int size = obj->oop_iterate(&cl);
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
1198 assert(size == obj->size(), "sanity");
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
1199 curr += size;
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
1200 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
1201 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
1202
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
1203 class CMRootRegionScanTask : public AbstractGangTask {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
1204 private:
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
1205 ConcurrentMark* _cm;
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
1206
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
1207 public:
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
1208 CMRootRegionScanTask(ConcurrentMark* cm) :
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
1209 AbstractGangTask("Root Region Scan"), _cm(cm) { }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
1210
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
1211 void work(uint worker_id) {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
1212 assert(Thread::current()->is_ConcurrentGC_thread(),
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
1213 "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
1214
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
1215 CMRootRegions* root_regions = _cm->root_regions();
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
1216 HeapRegion* hr = root_regions->claim_next();
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
1217 while (hr != NULL) {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
1218 _cm->scanRootRegion(hr, worker_id);
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
1219 hr = root_regions->claim_next();
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
1220 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
1221 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
1222 };
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
1223
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
1224 void ConcurrentMark::scanRootRegions() {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
1225 // 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
1226 // 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
1227 // should not attempt to do any further work.
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
1228 if (root_regions()->scan_in_progress()) {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
1229 _parallel_marking_threads = calc_parallel_marking_threads();
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
1230 assert(parallel_marking_threads() <= max_parallel_marking_threads(),
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
1231 "Maximum number of marking threads exceeded");
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
1232 uint active_workers = MAX2(1U, parallel_marking_threads());
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
1233
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
1234 CMRootRegionScanTask task(this);
8008
256d3f43c177 8005875: G1: Kitchensink fails with ParallelGCThreads=0
johnc
parents: 8006
diff changeset
1235 if (use_parallel_marking_threads()) {
4837
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
1236 _parallel_workers->set_active_workers((int) active_workers);
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
1237 _parallel_workers->run_task(&task);
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
1238 } else {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
1239 task.work(0);
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
1240 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
1241
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
1242 // 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
1243 // 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
1244 // mainly used for sanity checking.
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
1245 root_regions()->scan_finished();
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 }
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 4836
diff changeset
1248
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1249 void ConcurrentMark::markFromRoots() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1250 // we might be tempted to assert that:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1251 // assert(asynch == !SafepointSynchronize::is_at_safepoint(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1252 // "inconsistent argument?");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1253 // However that wouldn't be right, because it's possible that
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1254 // a safepoint is indeed in progress as a younger generation
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1255 // 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
1256
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1257 _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
1258 force_overflow_conc()->init();
4095
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents: 4093
diff changeset
1259
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents: 4093
diff changeset
1260 // _g1h has _n_par_threads
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents: 4093
diff changeset
1261 _parallel_marking_threads = calc_parallel_marking_threads();
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents: 4093
diff changeset
1262 assert(parallel_marking_threads() <= max_parallel_marking_threads(),
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents: 4093
diff changeset
1263 "Maximum number of marking threads exceeded");
4711
adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken
johnc
parents: 4097
diff changeset
1264
4728
441e946dc1af 7121618: Change type of number of GC workers to unsigned int.
jmasa
parents: 4711
diff changeset
1265 uint active_workers = MAX2(1U, parallel_marking_threads());
4711
adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken
johnc
parents: 4097
diff changeset
1266
8788
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents: 8787
diff changeset
1267 // 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
1268 set_concurrency_and_phase(active_workers, true /* concurrent */);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1269
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1270 CMConcurrentMarkingTask markingTask(this, cmThread());
8008
256d3f43c177 8005875: G1: Kitchensink fails with ParallelGCThreads=0
johnc
parents: 8006
diff changeset
1271 if (use_parallel_marking_threads()) {
4711
adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken
johnc
parents: 4097
diff changeset
1272 _parallel_workers->set_active_workers((int)active_workers);
adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken
johnc
parents: 4097
diff changeset
1273 // Don't set _n_par_threads because it affects MT in proceess_strong_roots()
adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken
johnc
parents: 4097
diff changeset
1274 // and the decisions on that MT processing is made elsewhere.
adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken
johnc
parents: 4097
diff changeset
1275 assert(_parallel_workers->active_workers() > 0, "Should have been set");
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1276 _parallel_workers->run_task(&markingTask);
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
1277 } else {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1278 markingTask.work(0);
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
1279 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1280 print_stats();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1281 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1282
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1283 void ConcurrentMark::checkpointRootsFinal(bool clear_all_soft_refs) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1284 // world is stopped at this checkpoint
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1285 assert(SafepointSynchronize::is_at_safepoint(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1286 "world should be stopped");
3979
4dfb2df418f2 6484982: G1: process references during evacuation pauses
johnc
parents: 3977
diff changeset
1287
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1288 G1CollectedHeap* g1h = G1CollectedHeap::heap();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1289
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1290 // If a full collection has happened, we shouldn't do this.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1291 if (has_aborted()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1292 g1h->set_marking_complete(); // So bitmap clearing isn't confused
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1293 return;
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
2125
7246a374a9f2 6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents: 2037
diff changeset
1296 SvcGCMarker sgcm(SvcGCMarker::OTHER);
7246a374a9f2 6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents: 2037
diff changeset
1297
845
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents: 831
diff changeset
1298 if (VerifyDuringGC) {
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents: 831
diff changeset
1299 HandleMark hm; // handle scope
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents: 831
diff changeset
1300 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
1301 Universe::verify(VerifyOption_G1UsePrevMarking,
b06ac540229e 8013132: Add a flag to turn off the output of the verbose verification code
stefank
parents: 9076
diff changeset
1302 " VerifyDuringGC:(before)");
845
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents: 831
diff changeset
1303 }
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents: 831
diff changeset
1304
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1305 G1CollectorPolicy* g1p = g1h->g1_policy();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1306 g1p->record_concurrent_mark_remark_start();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1307
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1308 double start = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1309
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1310 checkpointRootsFinalWork();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1311
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1312 double mark_work_end = os::elapsedTime();
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 weakRefsWork(clear_all_soft_refs);
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 if (has_overflown()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1317 // Oops. We overflowed. Restart concurrent marking.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1318 _restart_for_overflow = true;
8789
1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure
johnc
parents: 8788
diff changeset
1319 if (G1TraceMarkStackOverflow) {
1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure
johnc
parents: 8788
diff changeset
1320 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
1321 }
1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure
johnc
parents: 8788
diff changeset
1322
1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure
johnc
parents: 8788
diff changeset
1323 // 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
1324 if (VerifyDuringGC) {
1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure
johnc
parents: 8788
diff changeset
1325 HandleMark hm; // handle scope
1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure
johnc
parents: 8788
diff changeset
1326 Universe::heap()->prepare_for_verify();
10186
b06ac540229e 8013132: Add a flag to turn off the output of the verbose verification code
stefank
parents: 9076
diff changeset
1327 Universe::verify(VerifyOption_G1UsePrevMarking,
b06ac540229e 8013132: Add a flag to turn off the output of the verbose verification code
stefank
parents: 9076
diff changeset
1328 " VerifyDuringGC:(overflow)");
8789
1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure
johnc
parents: 8788
diff changeset
1329 }
1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure
johnc
parents: 8788
diff changeset
1330
7450
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes
johnc
parents: 7397
diff changeset
1331 // Clear the marking state because we will be restarting
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes
johnc
parents: 7397
diff changeset
1332 // marking due to overflowing the global mark stack.
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes
johnc
parents: 7397
diff changeset
1333 reset_marking_state();
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1334 } else {
4836
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1335 // 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
1336 // while marking.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1337 aggregate_count_data();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1338
2149
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles
tonyp
parents: 2125
diff changeset
1339 SATBMarkQueueSet& satb_mq_set = JavaThread::satb_mark_queue_set();
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1340 // We're done with marking.
1317
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues
tonyp
parents: 1314
diff changeset
1341 // 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
1342 // threads to have SATB queues with active set to true.
2149
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles
tonyp
parents: 2125
diff changeset
1343 satb_mq_set.set_active_all_threads(false, /* new active value */
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles
tonyp
parents: 2125
diff changeset
1344 true /* expected_active */);
811
830ca2573896 6850846: G1: extend G1 marking verification
tonyp
parents: 751
diff changeset
1345
830ca2573896 6850846: G1: extend G1 marking verification
tonyp
parents: 751
diff changeset
1346 if (VerifyDuringGC) {
845
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents: 831
diff changeset
1347 HandleMark hm; // handle scope
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents: 831
diff changeset
1348 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
1349 Universe::verify(VerifyOption_G1UseNextMarking,
b06ac540229e 8013132: Add a flag to turn off the output of the verbose verification code
stefank
parents: 9076
diff changeset
1350 " VerifyDuringGC:(after)");
811
830ca2573896 6850846: G1: extend G1 marking verification
tonyp
parents: 751
diff changeset
1351 }
2174
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
1352 assert(!restart_for_overflow(), "sanity");
7450
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes
johnc
parents: 7397
diff changeset
1353 // Completely reset the marking state since marking completed
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes
johnc
parents: 7397
diff changeset
1354 set_non_marking_state();
2174
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
1355 }
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
1356
7397
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 6865
diff changeset
1357 // 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
1358 if (_markStack.should_expand()) {
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 6865
diff changeset
1359 _markStack.expand();
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 6865
diff changeset
1360 }
442f942757c0 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 6865
diff changeset
1361
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1362 // Statistics
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1363 double now = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1364 _remark_mark_times.add((mark_work_end - start) * 1000.0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1365 _remark_weak_ref_times.add((now - mark_work_end) * 1000.0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1366 _remark_times.add((now - start) * 1000.0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1367
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1368 g1p->record_concurrent_mark_remark_end();
10405
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing
sla
parents: 10290
diff changeset
1369
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing
sla
parents: 10290
diff changeset
1370 G1CMIsAliveClosure is_alive(g1h);
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing
sla
parents: 10290
diff changeset
1371 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
1372 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1373
6027
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents: 6011
diff changeset
1374 // 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
1375 // liveness counting data.
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents: 6011
diff changeset
1376 class CMCountDataClosureBase: public HeapRegionClosure {
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents: 6011
diff changeset
1377 protected:
6812
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 6750
diff changeset
1378 G1CollectedHeap* _g1h;
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1379 ConcurrentMark* _cm;
6812
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 6750
diff changeset
1380 CardTableModRefBS* _ct_bs;
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 6750
diff changeset
1381
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1382 BitMap* _region_bm;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1383 BitMap* _card_bm;
4836
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1384
6812
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 6750
diff changeset
1385 // 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
1386 // 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
1387 // 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
1388 // 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
1389 // associated "continues humongous" regions.
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much
tonyp
parents: 811
diff changeset
1390 void set_bit_for_region(HeapRegion* hr) {
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much
tonyp
parents: 811
diff changeset
1391 assert(!hr->continuesHumongous(), "should have filtered those out");
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much
tonyp
parents: 811
diff changeset
1392
6010
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents: 6008
diff changeset
1393 BitMap::idx_t index = (BitMap::idx_t) hr->hrs_index();
829
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much
tonyp
parents: 811
diff changeset
1394 if (!hr->startsHumongous()) {
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much
tonyp
parents: 811
diff changeset
1395 // 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
1396 _region_bm->par_at_put(index, true);
829
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much
tonyp
parents: 811
diff changeset
1397 } else {
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much
tonyp
parents: 811
diff changeset
1398 // 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
1399 // 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
1400 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
1401 _region_bm->par_at_put_range(index, end_index, true);
829
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much
tonyp
parents: 811
diff changeset
1402 }
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much
tonyp
parents: 811
diff changeset
1403 }
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much
tonyp
parents: 811
diff changeset
1404
6027
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents: 6011
diff changeset
1405 public:
6812
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 6750
diff changeset
1406 CMCountDataClosureBase(G1CollectedHeap* g1h,
6027
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents: 6011
diff changeset
1407 BitMap* region_bm, BitMap* card_bm):
6812
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 6750
diff changeset
1408 _g1h(g1h), _cm(g1h->concurrent_mark()),
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 6750
diff changeset
1409 _ct_bs((CardTableModRefBS*) (g1h->barrier_set())),
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 6750
diff changeset
1410 _region_bm(region_bm), _card_bm(card_bm) { }
6027
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents: 6011
diff changeset
1411 };
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents: 6011
diff changeset
1412
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents: 6011
diff changeset
1413 // Closure that calculates the # live objects per region. Used
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents: 6011
diff changeset
1414 // for verification purposes during the cleanup pause.
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents: 6011
diff changeset
1415 class CalcLiveObjectsClosure: public CMCountDataClosureBase {
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents: 6011
diff changeset
1416 CMBitMapRO* _bm;
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents: 6011
diff changeset
1417 size_t _region_marked_bytes;
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 public:
6812
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 6750
diff changeset
1420 CalcLiveObjectsClosure(CMBitMapRO *bm, G1CollectedHeap* g1h,
6027
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents: 6011
diff changeset
1421 BitMap* region_bm, BitMap* card_bm) :
6812
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 6750
diff changeset
1422 CMCountDataClosureBase(g1h, region_bm, card_bm),
6027
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents: 6011
diff changeset
1423 _bm(bm), _region_marked_bytes(0) { }
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents: 6011
diff changeset
1424
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1425 bool doHeapRegion(HeapRegion* hr) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1426
639
922c573ea67d 6815683: G1: SEGV during marking
iveresov
parents: 619
diff changeset
1427 if (hr->continuesHumongous()) {
829
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much
tonyp
parents: 811
diff changeset
1428 // We will ignore these here and process them when their
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much
tonyp
parents: 811
diff changeset
1429 // associated "starts humongous" region is processed (see
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much
tonyp
parents: 811
diff changeset
1430 // 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
1431 // associated "starts humongous" region to have their bit set to
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much
tonyp
parents: 811
diff changeset
1432 // 1 since, due to the region chunking in the parallel region
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much
tonyp
parents: 811
diff changeset
1433 // iteration, a "continues humongous" region might be visited
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much
tonyp
parents: 811
diff changeset
1434 // before its associated "starts humongous".
639
922c573ea67d 6815683: G1: SEGV during marking
iveresov
parents: 619
diff changeset
1435 return false;
922c573ea67d 6815683: G1: SEGV during marking
iveresov
parents: 619
diff changeset
1436 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1437
6812
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 6750
diff changeset
1438 HeapWord* ntams = hr->next_top_at_mark_start();
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 6750
diff changeset
1439 HeapWord* start = hr->bottom();
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 6750
diff changeset
1440
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 6750
diff changeset
1441 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
1442 err_msg("Preconditions not met - "
6812
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 6750
diff changeset
1443 "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
1444 p2i(start), p2i(ntams), p2i(hr->end())));
4836
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1445
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1446 // Find the first marked object at or after "start".
6812
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 6750
diff changeset
1447 start = _bm->getNextMarkedWordAddress(start, ntams);
4836
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1448
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1449 size_t marked_bytes = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1450
6812
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 6750
diff changeset
1451 while (start < ntams) {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1452 oop obj = oop(start);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1453 int obj_sz = obj->size();
6812
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 6750
diff changeset
1454 HeapWord* obj_end = start + obj_sz;
6027
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents: 6011
diff changeset
1455
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents: 6011
diff changeset
1456 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
1457 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
1458
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 6750
diff changeset
1459 // 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
1460 // 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
1461 // 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
1462 // just beyond the heap.
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 6750
diff changeset
1463 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
1464 // end of object is not card aligned - increment to cover
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 6750
diff changeset
1465 // all the cards spanned by the object
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 6750
diff changeset
1466 end_idx += 1;
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 6750
diff changeset
1467 }
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 6750
diff changeset
1468
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 6750
diff changeset
1469 // 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
1470 _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
1471
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents: 6011
diff changeset
1472 // 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
1473 marked_bytes += (size_t)obj_sz * HeapWordSize;
4836
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1474
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1475 // Find the next marked object after this one.
6812
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 6750
diff changeset
1476 start = _bm->getNextMarkedWordAddress(obj_end, ntams);
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
1477 }
4836
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1478
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1479 // Mark the allocated-since-marking portion...
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1480 HeapWord* top = hr->top();
6812
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 6750
diff changeset
1481 if (ntams < top) {
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 6750
diff changeset
1482 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
1483 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
1484
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 6750
diff changeset
1485 // 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
1486 // 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
1487 // 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
1488 // just beyond the heap.
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 6750
diff changeset
1489 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
1490 // end of object is not card aligned - increment to cover
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 6750
diff changeset
1491 // all the cards spanned by the object
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 6750
diff changeset
1492 end_idx += 1;
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 6750
diff changeset
1493 }
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 6750
diff changeset
1494 _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
1495
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1496 // This definitely means the region has live objects.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1497 set_bit_for_region(hr);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1498 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1499
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1500 // Update the live region bitmap.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1501 if (marked_bytes > 0) {
829
30b9b25b9cc1 6850869: G1: RSet "scrubbing" scrubs too much
tonyp
parents: 811
diff changeset
1502 set_bit_for_region(hr);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1503 }
4836
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1504
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1505 // 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
1506 // it can be queried by a calling verificiation routine
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1507 _region_marked_bytes = marked_bytes;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1508
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1509 return false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1510 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1511
4836
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1512 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
1513 };
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1514
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1515 // Heap region closure used for verifying the counting data
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1516 // that was accumulated concurrently and aggregated during
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1517 // 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
1518 // regions during the STW cleanup pause.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1519
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1520 class VerifyLiveObjectDataHRClosure: public HeapRegionClosure {
6812
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 6750
diff changeset
1521 G1CollectedHeap* _g1h;
4836
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1522 ConcurrentMark* _cm;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1523 CalcLiveObjectsClosure _calc_cl;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1524 BitMap* _region_bm; // Region BM to be verified
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1525 BitMap* _card_bm; // Card BM to be verified
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1526 bool _verbose; // verbose output?
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1527
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1528 BitMap* _exp_region_bm; // Expected Region BM values
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1529 BitMap* _exp_card_bm; // Expected card BM values
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1530
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1531 int _failures;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1532
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1533 public:
6812
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 6750
diff changeset
1534 VerifyLiveObjectDataHRClosure(G1CollectedHeap* g1h,
4836
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1535 BitMap* region_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1536 BitMap* card_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1537 BitMap* exp_region_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1538 BitMap* exp_card_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1539 bool verbose) :
6812
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 6750
diff changeset
1540 _g1h(g1h), _cm(g1h->concurrent_mark()),
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 6750
diff changeset
1541 _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
1542 _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
1543 _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
1544 _failures(0) { }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1545
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1546 int failures() const { return _failures; }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1547
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1548 bool doHeapRegion(HeapRegion* hr) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1549 if (hr->continuesHumongous()) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1550 // 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
1551 // associated "starts humongous" region is processed (see
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1552 // 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
1553 // 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
1554 // 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
1555 // iteration, a "continues humongous" region might be visited
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1556 // before its associated "starts humongous".
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1557 return false;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1558 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1559
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1560 int failures = 0;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1561
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1562 // Call the CalcLiveObjectsClosure to walk the marking bitmap for
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1563 // 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
1564 // and card bitmaps.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1565 bool res = _calc_cl.doHeapRegion(hr);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1566 assert(res == false, "should be continuing");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1567
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1568 MutexLockerEx x((_verbose ? ParGCRareEvent_lock : NULL),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1569 Mutex::_no_safepoint_check_flag);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1570
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1571 // Verify the marked bytes for this region.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1572 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
1573 size_t act_marked_bytes = hr->next_marked_bytes();
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 // 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
1576 // 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
1577 if (exp_marked_bytes > act_marked_bytes) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1578 if (_verbose) {
6010
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents: 6008
diff changeset
1579 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
1580 "expected: " SIZE_FORMAT ", actual: " SIZE_FORMAT,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1581 hr->hrs_index(), exp_marked_bytes, act_marked_bytes);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1582 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1583 failures += 1;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1584 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1585
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1586 // 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
1587 // (which was just calculated) region bit maps.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1588 // 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
1589 // 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
1590 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
1591
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1592 bool expected = _exp_region_bm->at(index);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1593 bool actual = _region_bm->at(index);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1594 if (expected && !actual) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1595 if (_verbose) {
6010
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents: 6008
diff changeset
1596 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
1597 "expected: %s, actual: %s",
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents: 6008
diff changeset
1598 hr->hrs_index(),
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents: 6008
diff changeset
1599 BOOL_TO_STR(expected), BOOL_TO_STR(actual));
4836
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1600 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1601 failures += 1;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1602 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1603
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1604 // 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
1605 // 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
1606 // 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
1607
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1608 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
1609 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
1610
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1611 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
1612 expected = _exp_card_bm->at(i);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1613 actual = _card_bm->at(i);
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 if (expected && !actual) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1616 if (_verbose) {
6010
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents: 6008
diff changeset
1617 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
1618 "expected: %s, actual: %s",
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents: 6008
diff changeset
1619 hr->hrs_index(), i,
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents: 6008
diff changeset
1620 BOOL_TO_STR(expected), BOOL_TO_STR(actual));
4836
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 failures += 1;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1623 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1624 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1625
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1626 if (failures > 0 && _verbose) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1627 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
1628 "marked_bytes: calc/actual " SIZE_FORMAT "/" SIZE_FORMAT,
17937
78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents: 17844
diff changeset
1629 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
1630 _calc_cl.region_marked_bytes(), hr->next_marked_bytes());
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 _failures += failures;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1634
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1635 // 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
1636 // find the first violating region by returning true.
4836
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1637 return false;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1638 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1639 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1640
4836
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1641 class G1ParVerifyFinalCountTask: public AbstractGangTask {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1642 protected:
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1643 G1CollectedHeap* _g1h;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1644 ConcurrentMark* _cm;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1645 BitMap* _actual_region_bm;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1646 BitMap* _actual_card_bm;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1647
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1648 uint _n_workers;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1649
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1650 BitMap* _expected_region_bm;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1651 BitMap* _expected_card_bm;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1652
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1653 int _failures;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1654 bool _verbose;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1655
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1656 public:
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1657 G1ParVerifyFinalCountTask(G1CollectedHeap* g1h,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1658 BitMap* region_bm, BitMap* card_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1659 BitMap* expected_region_bm, BitMap* expected_card_bm)
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1660 : AbstractGangTask("G1 verify final counting"),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1661 _g1h(g1h), _cm(_g1h->concurrent_mark()),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1662 _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
1663 _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
1664 _failures(0), _verbose(false),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1665 _n_workers(0) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1666 assert(VerifyDuringGC, "don't call this otherwise");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1667
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1668 // 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
1669 // in the call to run_task().
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1670 if (G1CollectedHeap::use_parallel_gc_threads()) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1671 assert( _g1h->workers()->active_workers() > 0,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1672 "Should have been previously set");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1673 _n_workers = _g1h->workers()->active_workers();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1674 } else {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1675 _n_workers = 1;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1676 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1677
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1678 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
1679 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
1680
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1681 _verbose = _cm->verbose_medium();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1682 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1683
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1684 void work(uint worker_id) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1685 assert(worker_id < _n_workers, "invariant");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1686
6812
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 6750
diff changeset
1687 VerifyLiveObjectDataHRClosure verify_cl(_g1h,
4836
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1688 _actual_region_bm, _actual_card_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1689 _expected_region_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1690 _expected_card_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1691 _verbose);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1692
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1693 if (G1CollectedHeap::use_parallel_gc_threads()) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1694 _g1h->heap_region_par_iterate_chunked(&verify_cl,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1695 worker_id,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1696 _n_workers,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1697 HeapRegion::VerifyCountClaimValue);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1698 } else {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1699 _g1h->heap_region_iterate(&verify_cl);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1700 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1701
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1702 Atomic::add(verify_cl.failures(), &_failures);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1703 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1704
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1705 int failures() const { return _failures; }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1706 };
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1707
6027
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents: 6011
diff changeset
1708 // Closure that finalizes the liveness counting data.
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents: 6011
diff changeset
1709 // Used during the cleanup pause.
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents: 6011
diff changeset
1710 // Sets the bits corresponding to the interval [NTAMS, top]
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents: 6011
diff changeset
1711 // (which contains the implicitly live objects) in the
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents: 6011
diff changeset
1712 // 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
1713 // containing live data, in the region liveness bitmap.
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents: 6011
diff changeset
1714
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents: 6011
diff changeset
1715 class FinalCountDataUpdateClosure: public CMCountDataClosureBase {
4836
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1716 public:
6812
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 6750
diff changeset
1717 FinalCountDataUpdateClosure(G1CollectedHeap* g1h,
4836
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1718 BitMap* region_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1719 BitMap* card_bm) :
6812
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 6750
diff changeset
1720 CMCountDataClosureBase(g1h, region_bm, card_bm) { }
4836
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1721
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1722 bool doHeapRegion(HeapRegion* hr) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1723
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1724 if (hr->continuesHumongous()) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1725 // 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
1726 // associated "starts humongous" region is processed (see
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1727 // 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
1728 // 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
1729 // 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
1730 // iteration, a "continues humongous" region might be visited
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1731 // before its associated "starts humongous".
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1732 return false;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1733 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1734
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1735 HeapWord* ntams = hr->next_top_at_mark_start();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1736 HeapWord* top = hr->top();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1737
6027
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents: 6011
diff changeset
1738 assert(hr->bottom() <= ntams && ntams <= hr->end(), "Preconditions.");
4836
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1739
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1740 // Mark the allocated-since-marking portion...
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1741 if (ntams < top) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1742 // This definitely means the region has live objects.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1743 set_bit_for_region(hr);
6812
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 6750
diff changeset
1744
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 6750
diff changeset
1745 // 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
1746 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
1747 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
1748
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 6750
diff changeset
1749 // 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
1750 // 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
1751 // 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
1752 // just beyond the heap.
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 6750
diff changeset
1753 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
1754 // end of object is not card aligned - increment to cover
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 6750
diff changeset
1755 // all the cards spanned by the object
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 6750
diff changeset
1756 end_idx += 1;
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 6750
diff changeset
1757 }
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 6750
diff changeset
1758
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 6750
diff changeset
1759 assert(end_idx <= _card_bm->size(),
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 6750
diff changeset
1760 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
1761 end_idx, _card_bm->size()));
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 6750
diff changeset
1762 assert(start_idx < _card_bm->size(),
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 6750
diff changeset
1763 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
1764 start_idx, _card_bm->size()));
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 _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
1767 }
4836
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1768
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1769 // 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
1770 if (hr->next_marked_bytes() > 0) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1771 set_bit_for_region(hr);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1772 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1773
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1774 return false;
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 };
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1777
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1778 class G1ParFinalCountTask: public AbstractGangTask {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1779 protected:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1780 G1CollectedHeap* _g1h;
4836
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1781 ConcurrentMark* _cm;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1782 BitMap* _actual_region_bm;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1783 BitMap* _actual_card_bm;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1784
4728
441e946dc1af 7121618: Change type of number of GC workers to unsigned int.
jmasa
parents: 4711
diff changeset
1785 uint _n_workers;
4836
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1786
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1787 public:
4836
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1788 G1ParFinalCountTask(G1CollectedHeap* g1h, BitMap* region_bm, BitMap* card_bm)
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1789 : AbstractGangTask("G1 final counting"),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1790 _g1h(g1h), _cm(_g1h->concurrent_mark()),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1791 _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
1792 _n_workers(0) {
4095
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents: 4093
diff changeset
1793 // 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
1794 // in the call to run_task().
4095
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents: 4093
diff changeset
1795 if (G1CollectedHeap::use_parallel_gc_threads()) {
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents: 4093
diff changeset
1796 assert( _g1h->workers()->active_workers() > 0,
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents: 4093
diff changeset
1797 "Should have been previously set");
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents: 4093
diff changeset
1798 _n_workers = _g1h->workers()->active_workers();
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
1799 } else {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1800 _n_workers = 1;
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
1801 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1802 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1803
4728
441e946dc1af 7121618: Change type of number of GC workers to unsigned int.
jmasa
parents: 4711
diff changeset
1804 void work(uint worker_id) {
4836
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1805 assert(worker_id < _n_workers, "invariant");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1806
6812
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 6750
diff changeset
1807 FinalCountDataUpdateClosure final_update_cl(_g1h,
4836
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1808 _actual_region_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1809 _actual_card_bm);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1810
1833
8b10f48633dc 6984287: Regularize how GC parallel workers are specified.
jmasa
parents: 1719
diff changeset
1811 if (G1CollectedHeap::use_parallel_gc_threads()) {
4836
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1812 _g1h->heap_region_par_iterate_chunked(&final_update_cl,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1813 worker_id,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1814 _n_workers,
355
0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires
tonyp
parents: 343
diff changeset
1815 HeapRegion::FinalCountClaimValue);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1816 } else {
4836
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1817 _g1h->heap_region_iterate(&final_update_cl);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1818 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1819 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1820 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1821
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1822 class G1ParNoteEndTask;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1823
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1824 class G1NoteEndOfConcMarkClosure : public HeapRegionClosure {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1825 G1CollectedHeap* _g1;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1826 size_t _max_live_bytes;
6010
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents: 6008
diff changeset
1827 uint _regions_claimed;
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1828 size_t _freed_bytes;
2173
97ba643ea3ed 7014261: G1: RSet-related failures
tonyp
parents: 2152
diff changeset
1829 FreeRegionList* _local_cleanup_list;
17736
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents: 17635
diff changeset
1830 HeapRegionSetCount _old_regions_removed;
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents: 17635
diff changeset
1831 HeapRegionSetCount _humongous_regions_removed;
2173
97ba643ea3ed 7014261: G1: RSet-related failures
tonyp
parents: 2152
diff changeset
1832 HRRSCleanupTask* _hrrs_cleanup_task;
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1833 double _claimed_region_time;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1834 double _max_region_time;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1835
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1836 public:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1837 G1NoteEndOfConcMarkClosure(G1CollectedHeap* g1,
2173
97ba643ea3ed 7014261: G1: RSet-related failures
tonyp
parents: 2152
diff changeset
1838 FreeRegionList* local_cleanup_list,
4093
6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents: 4072
diff changeset
1839 HRRSCleanupTask* hrrs_cleanup_task) :
17844
8847586c9037 8016302: Change type of the number of GC workers to unsigned int (2)
vkempik
parents: 17841
diff changeset
1840 _g1(g1),
4093
6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents: 4072
diff changeset
1841 _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
1842 _freed_bytes(0),
6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents: 4072
diff changeset
1843 _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
1844 _local_cleanup_list(local_cleanup_list),
17736
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents: 17635
diff changeset
1845 _old_regions_removed(),
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents: 17635
diff changeset
1846 _humongous_regions_removed(),
4093
6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents: 4072
diff changeset
1847 _hrrs_cleanup_task(hrrs_cleanup_task) { }
6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents: 4072
diff changeset
1848
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1849 size_t freed_bytes() { return _freed_bytes; }
17736
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents: 17635
diff changeset
1850 const HeapRegionSetCount& old_regions_removed() { return _old_regions_removed; }
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents: 17635
diff changeset
1851 const HeapRegionSetCount& humongous_regions_removed() { return _humongous_regions_removed; }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1852
4093
6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents: 4072
diff changeset
1853 bool doHeapRegion(HeapRegion *hr) {
6254
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents: 6220
diff changeset
1854 if (hr->continuesHumongous()) {
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents: 6220
diff changeset
1855 return false;
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents: 6220
diff changeset
1856 }
4093
6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents: 4072
diff changeset
1857 // 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
1858 // 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
1859 _g1->reset_gc_time_stamps(hr);
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents: 6220
diff changeset
1860 double start = os::elapsedTime();
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents: 6220
diff changeset
1861 _regions_claimed++;
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents: 6220
diff changeset
1862 hr->note_end_of_marking();
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents: 6220
diff changeset
1863 _max_live_bytes += hr->max_live_bytes();
17736
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents: 17635
diff changeset
1864
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents: 17635
diff changeset
1865 if (hr->used() > 0 && hr->max_live_bytes() == 0 && !hr->is_young()) {
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents: 17635
diff changeset
1866 _freed_bytes += hr->used();
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents: 17635
diff changeset
1867 hr->set_containing_set(NULL);
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents: 17635
diff changeset
1868 if (hr->isHumongous()) {
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents: 17635
diff changeset
1869 assert(hr->startsHumongous(), "we should only see starts humongous");
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents: 17635
diff changeset
1870 _humongous_regions_removed.increment(1u, hr->capacity());
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents: 17635
diff changeset
1871 _g1->free_humongous_region(hr, _local_cleanup_list, true);
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents: 17635
diff changeset
1872 } else {
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents: 17635
diff changeset
1873 _old_regions_removed.increment(1u, hr->capacity());
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents: 17635
diff changeset
1874 _g1->free_region(hr, _local_cleanup_list, true);
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents: 17635
diff changeset
1875 }
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents: 17635
diff changeset
1876 } else {
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents: 17635
diff changeset
1877 hr->rem_set()->do_cleanup_work(_hrrs_cleanup_task);
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents: 17635
diff changeset
1878 }
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents: 17635
diff changeset
1879
6254
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents: 6220
diff changeset
1880 double region_time = (os::elapsedTime() - start);
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents: 6220
diff changeset
1881 _claimed_region_time += region_time;
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents: 6220
diff changeset
1882 if (region_time > _max_region_time) {
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents: 6220
diff changeset
1883 _max_region_time = region_time;
4093
6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents: 4072
diff changeset
1884 }
6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents: 4072
diff changeset
1885 return false;
6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents: 4072
diff changeset
1886 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1887
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1888 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
1889 uint regions_claimed() { return _regions_claimed; }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1890 double claimed_region_time_sec() { return _claimed_region_time; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1891 double max_region_time_sec() { return _max_region_time; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1892 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1893
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1894 class G1ParNoteEndTask: public AbstractGangTask {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1895 friend class G1NoteEndOfConcMarkClosure;
2152
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
1896
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1897 protected:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1898 G1CollectedHeap* _g1h;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1899 size_t _max_live_bytes;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1900 size_t _freed_bytes;
2152
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
1901 FreeRegionList* _cleanup_list;
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
1902
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1903 public:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1904 G1ParNoteEndTask(G1CollectedHeap* g1h,
2152
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
1905 FreeRegionList* cleanup_list) :
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1906 AbstractGangTask("G1 note end"), _g1h(g1h),
2152
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
1907 _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
1908
4728
441e946dc1af 7121618: Change type of number of GC workers to unsigned int.
jmasa
parents: 4711
diff changeset
1909 void work(uint worker_id) {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1910 double start = os::elapsedTime();
2173
97ba643ea3ed 7014261: G1: RSet-related failures
tonyp
parents: 2152
diff changeset
1911 FreeRegionList local_cleanup_list("Local Cleanup List");
97ba643ea3ed 7014261: G1: RSet-related failures
tonyp
parents: 2152
diff changeset
1912 HRRSCleanupTask hrrs_cleanup_task;
17844
8847586c9037 8016302: Change type of the number of GC workers to unsigned int (2)
vkempik
parents: 17841
diff changeset
1913 G1NoteEndOfConcMarkClosure g1_note_end(_g1h, &local_cleanup_list,
2173
97ba643ea3ed 7014261: G1: RSet-related failures
tonyp
parents: 2152
diff changeset
1914 &hrrs_cleanup_task);
1833
8b10f48633dc 6984287: Regularize how GC parallel workers are specified.
jmasa
parents: 1719
diff changeset
1915 if (G1CollectedHeap::use_parallel_gc_threads()) {
4728
441e946dc1af 7121618: Change type of number of GC workers to unsigned int.
jmasa
parents: 4711
diff changeset
1916 _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
1917 _g1h->workers()->active_workers(),
355
0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires
tonyp
parents: 343
diff changeset
1918 HeapRegion::NoteEndClaimValue);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1919 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1920 _g1h->heap_region_iterate(&g1_note_end);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1921 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1922 assert(g1_note_end.complete(), "Shouldn't have yielded!");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1923
2152
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
1924 // Now update the lists
17736
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents: 17635
diff changeset
1925 _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
1926 {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1927 MutexLockerEx x(ParGCRareEvent_lock, Mutex::_no_safepoint_check_flag);
17736
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents: 17635
diff changeset
1928 _g1h->decrement_summary_bytes(g1_note_end.freed_bytes());
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1929 _max_live_bytes += g1_note_end.max_live_bytes();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1930 _freed_bytes += g1_note_end.freed_bytes();
2152
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
1931
3778
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents: 3776
diff changeset
1932 // 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
1933 // 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
1934 // generate output for the newly-reclaimed regions (the list
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents: 3776
diff changeset
1935 // 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
1936 // 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
1937 // 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
1938 // cleanup list.
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents: 3776
diff changeset
1939
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents: 3776
diff changeset
1940 G1HRPrinter* hr_printer = _g1h->hr_printer();
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents: 3776
diff changeset
1941 if (hr_printer->is_active()) {
17736
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents: 17635
diff changeset
1942 FreeRegionListIterator iter(&local_cleanup_list);
3778
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents: 3776
diff changeset
1943 while (iter.more_available()) {
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents: 3776
diff changeset
1944 HeapRegion* hr = iter.get_next();
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents: 3776
diff changeset
1945 hr_printer->cleanup(hr);
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 }
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents: 3776
diff changeset
1948
17773
8ee855b4e667 8036025: Sort the freelist in order to shrink the heap
jwilhelm
parents: 17750
diff changeset
1949 _cleanup_list->add_ordered(&local_cleanup_list);
2173
97ba643ea3ed 7014261: G1: RSet-related failures
tonyp
parents: 2152
diff changeset
1950 assert(local_cleanup_list.is_empty(), "post-condition");
97ba643ea3ed 7014261: G1: RSet-related failures
tonyp
parents: 2152
diff changeset
1951
97ba643ea3ed 7014261: G1: RSet-related failures
tonyp
parents: 2152
diff changeset
1952 HeapRegionRemSet::finish_cleanup_task(&hrrs_cleanup_task);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1953 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1954 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1955 size_t max_live_bytes() { return _max_live_bytes; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1956 size_t freed_bytes() { return _freed_bytes; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1957 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1958
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1959 class G1ParScrubRemSetTask: public AbstractGangTask {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1960 protected:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1961 G1RemSet* _g1rs;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1962 BitMap* _region_bm;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1963 BitMap* _card_bm;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1964 public:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1965 G1ParScrubRemSetTask(G1CollectedHeap* g1h,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1966 BitMap* region_bm, BitMap* card_bm) :
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1967 AbstractGangTask("G1 ScrubRS"), _g1rs(g1h->g1_rem_set()),
4836
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
1968 _region_bm(region_bm), _card_bm(card_bm) { }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1969
4728
441e946dc1af 7121618: Change type of number of GC workers to unsigned int.
jmasa
parents: 4711
diff changeset
1970 void work(uint worker_id) {
1833
8b10f48633dc 6984287: Regularize how GC parallel workers are specified.
jmasa
parents: 1719
diff changeset
1971 if (G1CollectedHeap::use_parallel_gc_threads()) {
4728
441e946dc1af 7121618: Change type of number of GC workers to unsigned int.
jmasa
parents: 4711
diff changeset
1972 _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
1973 HeapRegion::ScrubRemSetClaimValue);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1974 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1975 _g1rs->scrub(_region_bm, _card_bm);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1976 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1977 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1978
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1979 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1980
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1981 void ConcurrentMark::cleanup() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1982 // world is stopped at this checkpoint
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1983 assert(SafepointSynchronize::is_at_safepoint(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1984 "world should be stopped");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1985 G1CollectedHeap* g1h = G1CollectedHeap::heap();
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 // If a full collection has happened, we shouldn't do this.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1988 if (has_aborted()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1989 g1h->set_marking_complete(); // So bitmap clearing isn't confused
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1990 return;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1991 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1992
2152
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
1993 g1h->verify_region_sets_optional();
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
1994
845
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents: 831
diff changeset
1995 if (VerifyDuringGC) {
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents: 831
diff changeset
1996 HandleMark hm; // handle scope
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents: 831
diff changeset
1997 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
1998 Universe::verify(VerifyOption_G1UsePrevMarking,
b06ac540229e 8013132: Add a flag to turn off the output of the verbose verification code
stefank
parents: 9076
diff changeset
1999 " VerifyDuringGC:(before)");
845
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents: 831
diff changeset
2000 }
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents: 831
diff changeset
2001
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2002 G1CollectorPolicy* g1p = G1CollectedHeap::heap()->g1_policy();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2003 g1p->record_concurrent_mark_cleanup_start();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2004
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2005 double start = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2006
2173
97ba643ea3ed 7014261: G1: RSet-related failures
tonyp
parents: 2152
diff changeset
2007 HeapRegionRemSet::reset_for_cleanup_tasks();
97ba643ea3ed 7014261: G1: RSet-related failures
tonyp
parents: 2152
diff changeset
2008
4728
441e946dc1af 7121618: Change type of number of GC workers to unsigned int.
jmasa
parents: 4711
diff changeset
2009 uint n_workers;
4095
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents: 4093
diff changeset
2010
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2011 // 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
2012 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
2013
1833
8b10f48633dc 6984287: Regularize how GC parallel workers are specified.
jmasa
parents: 1719
diff changeset
2014 if (G1CollectedHeap::use_parallel_gc_threads()) {
4836
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
2015 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
2016 "sanity check");
0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires
tonyp
parents: 343
diff changeset
2017
4711
adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken
johnc
parents: 4097
diff changeset
2018 g1h->set_par_threads();
adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken
johnc
parents: 4097
diff changeset
2019 n_workers = g1h->n_par_threads();
4728
441e946dc1af 7121618: Change type of number of GC workers to unsigned int.
jmasa
parents: 4711
diff changeset
2020 assert(g1h->n_par_threads() == n_workers,
4711
adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken
johnc
parents: 4097
diff changeset
2021 "Should not have been reset");
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2022 g1h->workers()->run_task(&g1_par_count_task);
4095
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents: 4093
diff changeset
2023 // Done with the parallel phase so reset to 0.
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2024 g1h->set_par_threads(0);
355
0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires
tonyp
parents: 343
diff changeset
2025
4836
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
2026 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
2027 "sanity check");
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2028 } else {
4711
adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken
johnc
parents: 4097
diff changeset
2029 n_workers = 1;
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2030 g1_par_count_task.work(0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2031 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2032
4836
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
2033 if (VerifyDuringGC) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
2034 // Verify that the counting data accumulated during marking matches
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
2035 // that calculated by walking the marking bitmap.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
2036
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
2037 // Bitmaps to hold expected values
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
2038 BitMap expected_region_bm(_region_bm.size(), false);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
2039 BitMap expected_card_bm(_card_bm.size(), false);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
2040
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
2041 G1ParVerifyFinalCountTask g1_par_verify_task(g1h,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
2042 &_region_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
2043 &_card_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
2044 &expected_region_bm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
2045 &expected_card_bm);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
2046
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
2047 if (G1CollectedHeap::use_parallel_gc_threads()) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
2048 g1h->set_par_threads((int)n_workers);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
2049 g1h->workers()->run_task(&g1_par_verify_task);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
2050 // Done with the parallel phase so reset to 0.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
2051 g1h->set_par_threads(0);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
2052
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
2053 assert(g1h->check_heap_region_claim_values(HeapRegion::VerifyCountClaimValue),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
2054 "sanity check");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
2055 } else {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
2056 g1_par_verify_task.work(0);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
2057 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
2058
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
2059 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
2060 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
2061
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2062 size_t start_used_bytes = g1h->used();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2063 g1h->set_marking_complete();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2064
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2065 double count_end = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2066 double this_final_counting_time = (count_end - start);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2067 _total_counting_time += this_final_counting_time;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2068
2435
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 2369
diff changeset
2069 if (G1PrintRegionLivenessInfo) {
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 2369
diff changeset
2070 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
2071 _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
2072 }
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 2369
diff changeset
2073
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2074 // Install newly created mark bitMap as "prev".
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2075 swapMarkBitMaps();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2076
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2077 g1h->reset_gc_time_stamp();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2078
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2079 // Note end of marking in all heap regions.
2152
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
2080 G1ParNoteEndTask g1_par_note_end_task(g1h, &_cleanup_list);
1833
8b10f48633dc 6984287: Regularize how GC parallel workers are specified.
jmasa
parents: 1719
diff changeset
2081 if (G1CollectedHeap::use_parallel_gc_threads()) {
4095
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents: 4093
diff changeset
2082 g1h->set_par_threads((int)n_workers);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2083 g1h->workers()->run_task(&g1_par_note_end_task);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2084 g1h->set_par_threads(0);
355
0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires
tonyp
parents: 343
diff changeset
2085
0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires
tonyp
parents: 343
diff changeset
2086 assert(g1h->check_heap_region_claim_values(HeapRegion::NoteEndClaimValue),
0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires
tonyp
parents: 343
diff changeset
2087 "sanity check");
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2088 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2089 g1_par_note_end_task.work(0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2090 }
6254
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents: 6220
diff changeset
2091 g1h->check_gc_time_stamps();
2152
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
2092
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
2093 if (!cleanup_list_is_empty()) {
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
2094 // 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
2095 // concurrently. Notify anyone else that might be wanting free
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
2096 // regions that there will be more free regions coming soon.
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
2097 g1h->set_free_regions_coming();
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
2098 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2099
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2100 // 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
2101 // regions.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2102 if (G1ScrubRemSets) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2103 double rs_scrub_start = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2104 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
2105 if (G1CollectedHeap::use_parallel_gc_threads()) {
4095
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents: 4093
diff changeset
2106 g1h->set_par_threads((int)n_workers);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2107 g1h->workers()->run_task(&g1_par_scrub_rs_task);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2108 g1h->set_par_threads(0);
355
0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires
tonyp
parents: 343
diff changeset
2109
0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires
tonyp
parents: 343
diff changeset
2110 assert(g1h->check_heap_region_claim_values(
0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires
tonyp
parents: 343
diff changeset
2111 HeapRegion::ScrubRemSetClaimValue),
0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires
tonyp
parents: 343
diff changeset
2112 "sanity check");
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2113 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2114 g1_par_scrub_rs_task.work(0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2115 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2116
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2117 double rs_scrub_end = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2118 double this_rs_scrub_time = (rs_scrub_end - rs_scrub_start);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2119 _total_rs_scrub_time += this_rs_scrub_time;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2120 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2121
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2122 // this will also free any regions totally full of garbage objects,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2123 // and sort the regions.
4095
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents: 4093
diff changeset
2124 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
2125
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2126 // Statistics.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2127 double end = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2128 _cleanup_times.add((end - start) * 1000.0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2129
6007
5c86f8211d1e 7160728: Introduce an extra logging level for G1 logging
brutisso
parents: 5988
diff changeset
2130 if (G1Log::fine()) {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2131 g1h->print_size_transition(gclog_or_tty,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2132 start_used_bytes,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2133 g1h->used(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2134 g1h->capacity());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2135 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2136
3979
4dfb2df418f2 6484982: G1: process references during evacuation pauses
johnc
parents: 3977
diff changeset
2137 // Clean up will have freed any regions completely full of garbage.
4dfb2df418f2 6484982: G1: process references during evacuation pauses
johnc
parents: 3977
diff changeset
2138 // Update the soft reference policy with the new heap occupancy.
4dfb2df418f2 6484982: G1: process references during evacuation pauses
johnc
parents: 3977
diff changeset
2139 Universe::update_heap_info_at_gc();
4dfb2df418f2 6484982: G1: process references during evacuation pauses
johnc
parents: 3977
diff changeset
2140
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2141 // We need to make this be a "collection" so any collection pause that
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2142 // races with it goes around and waits for completeCleanup to finish.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2143 g1h->increment_total_collections();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2144
4830
0b3d1ec6eaee 7097586: G1: improve the per-space output when using jmap -heap
tonyp
parents: 4828
diff changeset
2145 // We reclaimed old regions so we should calculate the sizes to make
0b3d1ec6eaee 7097586: G1: improve the per-space output when using jmap -heap
tonyp
parents: 4828
diff changeset
2146 // sure we update the old gen/space data.
0b3d1ec6eaee 7097586: G1: improve the per-space output when using jmap -heap
tonyp
parents: 4828
diff changeset
2147 g1h->g1mm()->update_sizes();
0b3d1ec6eaee 7097586: G1: improve the per-space output when using jmap -heap
tonyp
parents: 4828
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 }
2152
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
2155
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
2156 g1h->verify_region_sets_optional();
10405
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing
sla
parents: 10290
diff changeset
2157 g1h->trace_heap_after_concurrent_cycle();
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2158 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2159
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2160 void ConcurrentMark::completeCleanup() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2161 if (has_aborted()) return;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2162
2152
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
2163 G1CollectedHeap* g1h = G1CollectedHeap::heap();
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
2164
17841
14bd75c9dbfa 8039089: List verification enabled in product builds
jwilhelm
parents: 17773
diff changeset
2165 _cleanup_list.verify_optional();
2361
1216415d8e35 7014923: G1: code cleanup
tonyp
parents: 2177
diff changeset
2166 FreeRegionList tmp_free_list("Tmp Free List");
2152
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
2167
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
2168 if (G1ConcRegionFreeingVerbose) {
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
2169 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
2170 "cleanup list has %u entries",
2152
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
2171 _cleanup_list.length());
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
2172 }
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
2173
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
2174 // Noone else should be accessing the _cleanup_list at this point,
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
2175 // so it's not necessary to take any locks
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
2176 while (!_cleanup_list.is_empty()) {
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
2177 HeapRegion* hr = _cleanup_list.remove_head();
17773
8ee855b4e667 8036025: Sort the freelist in order to shrink the heap
jwilhelm
parents: 17750
diff changeset
2178 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
2179 hr->par_clear();
17773
8ee855b4e667 8036025: Sort the freelist in order to shrink the heap
jwilhelm
parents: 17750
diff changeset
2180 tmp_free_list.add_ordered(hr);
2152
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
2181
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
2182 // 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
2183 // 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
2184 // 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
2185 // 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
2186 // _cleanup_list is empty (which means we just removed the last
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
2187 // region from the _cleanup_list).
2361
1216415d8e35 7014923: G1: code cleanup
tonyp
parents: 2177
diff changeset
2188 if ((tmp_free_list.length() % G1SecondaryFreeListAppendLength == 0) ||
2152
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
2189 _cleanup_list.is_empty()) {
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
2190 if (G1ConcRegionFreeingVerbose) {
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
2191 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
2192 "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
2193 "cleanup list still has %u entries",
2361
1216415d8e35 7014923: G1: code cleanup
tonyp
parents: 2177
diff changeset
2194 tmp_free_list.length(),
2152
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
2195 _cleanup_list.length());
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2196 }
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 {
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
2199 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
2200 g1h->secondary_free_list_add(&tmp_free_list);
2152
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
2201 SecondaryFreeList_lock->notify_all();
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
2202 }
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
2203
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
2204 if (G1StressConcRegionFreeing) {
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
2205 for (uintx i = 0; i < G1StressConcRegionFreeingDelayMillis; ++i) {
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
2206 os::sleep(Thread::current(), (jlong) 1, false);
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
2207 }
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
2208 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2209 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2210 }
2361
1216415d8e35 7014923: G1: code cleanup
tonyp
parents: 2177
diff changeset
2211 assert(tmp_free_list.is_empty(), "post-condition");
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2212 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2213
8014
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents: 8008
diff changeset
2214 // Supporting Object and Oop closures for reference discovery
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents: 8008
diff changeset
2215 // and processing in during marking
2174
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2216
2037
b03260081e9b 7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field
johnc
parents: 1974
diff changeset
2217 bool G1CMIsAliveClosure::do_object_b(oop obj) {
b03260081e9b 7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field
johnc
parents: 1974
diff changeset
2218 HeapWord* addr = (HeapWord*)obj;
b03260081e9b 7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field
johnc
parents: 1974
diff changeset
2219 return addr != NULL &&
b03260081e9b 7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field
johnc
parents: 1974
diff changeset
2220 (!_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
2221 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2222
8014
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents: 8008
diff changeset
2223 // '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
2224 // 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
2225 // 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
2226 // trace referent objects.
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents: 8008
diff changeset
2227 //
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents: 8008
diff changeset
2228 // 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
2229 // 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
2230 // 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
2231 // 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
2232 // 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
2233 // operating on the global stack.
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents: 8008
diff changeset
2234
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents: 8008
diff changeset
2235 class G1CMKeepAliveAndDrainClosure: public OopClosure {
8787
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
2236 ConcurrentMark* _cm;
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
2237 CMTask* _task;
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
2238 int _ref_counter_limit;
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
2239 int _ref_counter;
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
2240 bool _is_serial;
2174
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2241 public:
8787
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
2242 G1CMKeepAliveAndDrainClosure(ConcurrentMark* cm, CMTask* task, bool is_serial) :
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
2243 _cm(cm), _task(task), _is_serial(is_serial),
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
2244 _ref_counter_limit(G1RefProcDrainInterval) {
2174
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2245 assert(_ref_counter_limit > 0, "sanity");
8787
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
2246 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
2247 _ref_counter = _ref_counter_limit;
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2248 }
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2249
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2250 virtual void do_oop(narrowOop* p) { do_oop_work(p); }
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2251 virtual void do_oop( oop* p) { do_oop_work(p); }
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2252
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2253 template <class T> void do_oop_work(T* p) {
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2254 if (!_cm->has_overflown()) {
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2255 oop obj = oopDesc::load_decode_heap_oop(p);
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
2256 if (_cm->verbose_high()) {
6862
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 6812
diff changeset
2257 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
2258 "*"PTR_FORMAT" = "PTR_FORMAT,
17937
78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents: 17844
diff changeset
2259 _task->worker_id(), p2i(p), p2i((void*) obj));
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
2260 }
2174
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2261
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2262 _task->deal_with_reference(obj);
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2263 _ref_counter--;
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 if (_ref_counter == 0) {
8014
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents: 8008
diff changeset
2266 // 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
2267 // 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
2268 // 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
2269 // process these entries.
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents: 8008
diff changeset
2270 //
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents: 8008
diff changeset
2271 // 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
2272 // 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
2273 // 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
2274 // above) or we overflow.
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents: 8008
diff changeset
2275 //
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents: 8008
diff changeset
2276 // 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
2277 // 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
2278 // 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
2279 // 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
2280 // 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
2281 // has_aborted() flag that the marking step has completed.
2174
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2282 do {
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2283 double mark_step_duration_ms = G1ConcMarkStepDurationMillis;
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2284 _task->do_marking_step(mark_step_duration_ms,
8787
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
2285 false /* do_termination */,
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
2286 _is_serial);
2174
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2287 } while (_task->has_aborted() && !_cm->has_overflown());
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2288 _ref_counter = _ref_counter_limit;
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2289 }
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2290 } else {
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
2291 if (_cm->verbose_high()) {
6862
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 6812
diff changeset
2292 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
2293 }
2174
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2294 }
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2295 }
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2296 };
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2297
8014
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents: 8008
diff changeset
2298 // '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
2299 // 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
2300 // 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
2301 // 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
2302 // 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
2303 // added by the 'keep alive' oop closure above.
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents: 8008
diff changeset
2304
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents: 8008
diff changeset
2305 class G1CMDrainMarkingStackClosure: public VoidClosure {
2174
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2306 ConcurrentMark* _cm;
8014
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents: 8008
diff changeset
2307 CMTask* _task;
8787
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
2308 bool _is_serial;
2174
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2309 public:
8787
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
2310 G1CMDrainMarkingStackClosure(ConcurrentMark* cm, CMTask* task, bool is_serial) :
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
2311 _cm(cm), _task(task), _is_serial(is_serial) {
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
2312 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
2313 }
2174
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2314
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2315 void do_void() {
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2316 do {
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
2317 if (_cm->verbose_high()) {
8787
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
2318 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
2319 _task->worker_id(), BOOL_TO_STR(_is_serial));
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
2320 }
2174
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2321
8014
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents: 8008
diff changeset
2322 // 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
2323 // 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
2324 // oop closure (an instance of G1CMKeepAliveAndDrainClosure above).
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents: 8008
diff changeset
2325 //
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents: 8008
diff changeset
2326 // 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
2327 // 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
2328 // 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
2329 // 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
2330 // the global marking stack.
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents: 8008
diff changeset
2331 //
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents: 8008
diff changeset
2332 // 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
2333 // 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
2334 // 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
2335 // 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
2336 // 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
2337 // has_aborted() flag that the marking step has completed.
2174
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2338
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2339 _task->do_marking_step(1000000000.0 /* something very large */,
8787
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
2340 true /* do_termination */,
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
2341 _is_serial);
2174
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2342 } while (_task->has_aborted() && !_cm->has_overflown());
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2343 }
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2344 };
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2345
3979
4dfb2df418f2 6484982: G1: process references during evacuation pauses
johnc
parents: 3977
diff changeset
2346 // Implementation of AbstractRefProcTaskExecutor for parallel
4dfb2df418f2 6484982: G1: process references during evacuation pauses
johnc
parents: 3977
diff changeset
2347 // reference processing at the end of G1 concurrent marking
4dfb2df418f2 6484982: G1: process references during evacuation pauses
johnc
parents: 3977
diff changeset
2348
4dfb2df418f2 6484982: G1: process references during evacuation pauses
johnc
parents: 3977
diff changeset
2349 class G1CMRefProcTaskExecutor: public AbstractRefProcTaskExecutor {
2174
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2350 private:
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2351 G1CollectedHeap* _g1h;
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2352 ConcurrentMark* _cm;
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2353 WorkGang* _workers;
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2354 int _active_workers;
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2355
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2356 public:
3979
4dfb2df418f2 6484982: G1: process references during evacuation pauses
johnc
parents: 3977
diff changeset
2357 G1CMRefProcTaskExecutor(G1CollectedHeap* g1h,
2174
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2358 ConcurrentMark* cm,
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2359 WorkGang* workers,
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2360 int n_workers) :
4093
6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents: 4072
diff changeset
2361 _g1h(g1h), _cm(cm),
6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents: 4072
diff changeset
2362 _workers(workers), _active_workers(n_workers) { }
2174
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2363
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2364 // Executes the given task using concurrent marking worker threads.
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2365 virtual void execute(ProcessTask& task);
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2366 virtual void execute(EnqueueTask& task);
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2367 };
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2368
3979
4dfb2df418f2 6484982: G1: process references during evacuation pauses
johnc
parents: 3977
diff changeset
2369 class G1CMRefProcTaskProxy: public AbstractGangTask {
2174
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2370 typedef AbstractRefProcTaskExecutor::ProcessTask ProcessTask;
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2371 ProcessTask& _proc_task;
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2372 G1CollectedHeap* _g1h;
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2373 ConcurrentMark* _cm;
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2374
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2375 public:
3979
4dfb2df418f2 6484982: G1: process references during evacuation pauses
johnc
parents: 3977
diff changeset
2376 G1CMRefProcTaskProxy(ProcessTask& proc_task,
2174
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2377 G1CollectedHeap* g1h,
4093
6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents: 4072
diff changeset
2378 ConcurrentMark* cm) :
2174
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2379 AbstractGangTask("Process reference objects in parallel"),
8014
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents: 8008
diff changeset
2380 _proc_task(proc_task), _g1h(g1h), _cm(cm) {
8787
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
2381 ReferenceProcessor* rp = _g1h->ref_processor_cm();
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
2382 assert(rp->processing_is_mt(), "shouldn't be here otherwise");
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
2383 }
2174
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2384
4728
441e946dc1af 7121618: Change type of number of GC workers to unsigned int.
jmasa
parents: 4711
diff changeset
2385 virtual void work(uint worker_id) {
8787
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
2386 CMTask* task = _cm->task(worker_id);
2174
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2387 G1CMIsAliveClosure g1_is_alive(_g1h);
8787
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
2388 G1CMKeepAliveAndDrainClosure g1_par_keep_alive(_cm, task, false /* is_serial */);
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
2389 G1CMDrainMarkingStackClosure g1_par_drain(_cm, task, false /* is_serial */);
2174
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2390
4728
441e946dc1af 7121618: Change type of number of GC workers to unsigned int.
jmasa
parents: 4711
diff changeset
2391 _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
2392 }
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2393 };
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2394
3979
4dfb2df418f2 6484982: G1: process references during evacuation pauses
johnc
parents: 3977
diff changeset
2395 void G1CMRefProcTaskExecutor::execute(ProcessTask& proc_task) {
2174
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2396 assert(_workers != NULL, "Need parallel worker threads.");
8014
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents: 8008
diff changeset
2397 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
2398
4093
6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents: 4072
diff changeset
2399 G1CMRefProcTaskProxy proc_task_proxy(proc_task, _g1h, _cm);
2174
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2400
8788
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents: 8787
diff changeset
2401 // 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
2402 // proxy task execution, so that the termination protocol
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents: 8787
diff changeset
2403 // 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
2404 // how many workers to wait for.
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents: 8787
diff changeset
2405 _cm->set_concurrency(_active_workers);
2174
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2406 _g1h->set_par_threads(_active_workers);
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2407 _workers->run_task(&proc_task_proxy);
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2408 _g1h->set_par_threads(0);
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 class G1CMRefEnqueueTaskProxy: public AbstractGangTask {
2174
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2412 typedef AbstractRefProcTaskExecutor::EnqueueTask EnqueueTask;
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2413 EnqueueTask& _enq_task;
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2414
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2415 public:
3979
4dfb2df418f2 6484982: G1: process references during evacuation pauses
johnc
parents: 3977
diff changeset
2416 G1CMRefEnqueueTaskProxy(EnqueueTask& enq_task) :
2174
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2417 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
2418 _enq_task(enq_task) { }
2174
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2419
4728
441e946dc1af 7121618: Change type of number of GC workers to unsigned int.
jmasa
parents: 4711
diff changeset
2420 virtual void work(uint worker_id) {
441e946dc1af 7121618: Change type of number of GC workers to unsigned int.
jmasa
parents: 4711
diff changeset
2421 _enq_task.work(worker_id);
2174
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2422 }
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2423 };
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2424
3979
4dfb2df418f2 6484982: G1: process references during evacuation pauses
johnc
parents: 3977
diff changeset
2425 void G1CMRefProcTaskExecutor::execute(EnqueueTask& enq_task) {
2174
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2426 assert(_workers != NULL, "Need parallel worker threads.");
8014
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents: 8008
diff changeset
2427 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
2428
3979
4dfb2df418f2 6484982: G1: process references during evacuation pauses
johnc
parents: 3977
diff changeset
2429 G1CMRefEnqueueTaskProxy enq_task_proxy(enq_task);
2174
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2430
8788
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents: 8787
diff changeset
2431 // Not strictly necessary but...
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents: 8787
diff changeset
2432 //
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents: 8787
diff changeset
2433 // 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
2434 // proxy task execution, so that the termination protocol
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents: 8787
diff changeset
2435 // 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
2436 // how many workers to wait for.
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents: 8787
diff changeset
2437 _cm->set_concurrency(_active_workers);
2174
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2438 _g1h->set_par_threads(_active_workers);
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2439 _workers->run_task(&enq_task_proxy);
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2440 _g1h->set_par_threads(0);
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2441 }
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2442
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2443 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
2444 if (has_overflown()) {
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents: 8787
diff changeset
2445 // Skip processing the discovered references if we have
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents: 8787
diff changeset
2446 // overflown the global marking stack. Reference objects
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents: 8787
diff changeset
2447 // 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
2448 // 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
2449 // 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
2450 // less reference objects are discovered.
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents: 8787
diff changeset
2451 return;
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents: 8787
diff changeset
2452 }
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents: 8787
diff changeset
2453
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2454 ResourceMark rm;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2455 HandleMark hm;
3975
1847b501ae74 7068215: G1: Print reference processing time during remark
johnc
parents: 3914
diff changeset
2456
1847b501ae74 7068215: G1: Print reference processing time during remark
johnc
parents: 3914
diff changeset
2457 G1CollectedHeap* g1h = G1CollectedHeap::heap();
1847b501ae74 7068215: G1: Print reference processing time during remark
johnc
parents: 3914
diff changeset
2458
1847b501ae74 7068215: G1: Print reference processing time during remark
johnc
parents: 3914
diff changeset
2459 // Is alive closure.
1847b501ae74 7068215: G1: Print reference processing time during remark
johnc
parents: 3914
diff changeset
2460 G1CMIsAliveClosure g1_is_alive(g1h);
1847b501ae74 7068215: G1: Print reference processing time during remark
johnc
parents: 3914
diff changeset
2461
1847b501ae74 7068215: G1: Print reference processing time during remark
johnc
parents: 3914
diff changeset
2462 // 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
2463 // tables from the displayed time.
1847b501ae74 7068215: G1: Print reference processing time during remark
johnc
parents: 3914
diff changeset
2464 {
6007
5c86f8211d1e 7160728: Introduce an extra logging level for G1 logging
brutisso
parents: 5988
diff changeset
2465 if (G1Log::finer()) {
3975
1847b501ae74 7068215: G1: Print reference processing time during remark
johnc
parents: 3914
diff changeset
2466 gclog_or_tty->put(' ');
1847b501ae74 7068215: G1: Print reference processing time during remark
johnc
parents: 3914
diff changeset
2467 }
20190
0982ec23da03 8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents: 17950
diff changeset
2468 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
2469
3979
4dfb2df418f2 6484982: G1: process references during evacuation pauses
johnc
parents: 3977
diff changeset
2470 ReferenceProcessor* rp = g1h->ref_processor_cm();
3975
1847b501ae74 7068215: G1: Print reference processing time during remark
johnc
parents: 3914
diff changeset
2471
1847b501ae74 7068215: G1: Print reference processing time during remark
johnc
parents: 3914
diff changeset
2472 // See the comment in G1CollectedHeap::ref_processing_init()
1847b501ae74 7068215: G1: Print reference processing time during remark
johnc
parents: 3914
diff changeset
2473 // about how reference processing currently works in G1.
1847b501ae74 7068215: G1: Print reference processing time during remark
johnc
parents: 3914
diff changeset
2474
8014
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents: 8008
diff changeset
2475 // Set the soft reference policy
3975
1847b501ae74 7068215: G1: Print reference processing time during remark
johnc
parents: 3914
diff changeset
2476 rp->setup_policy(clear_all_soft_refs);
1847b501ae74 7068215: G1: Print reference processing time during remark
johnc
parents: 3914
diff changeset
2477 assert(_markStack.isEmpty(), "mark stack should be empty");
1847b501ae74 7068215: G1: Print reference processing time during remark
johnc
parents: 3914
diff changeset
2478
8787
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
2479 // Instances of the 'Keep Alive' and 'Complete GC' closures used
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
2480 // in serial reference processing. Note these closures are also
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
2481 // used for serially processing (by the the current thread) the
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
2482 // JNI references during parallel reference processing.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
2483 //
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
2484 // These closures do not need to synchronize with the worker
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
2485 // threads involved in parallel reference processing as these
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
2486 // instances are executed serially by the current thread (e.g.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
2487 // reference processing is not multi-threaded and is thus
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
2488 // performed by the current thread instead of a gang worker).
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
2489 //
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
2490 // The gang tasks involved in parallel reference procssing create
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
2491 // their own instances of these closures, which do their own
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
2492 // synchronization among themselves.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
2493 G1CMKeepAliveAndDrainClosure g1_keep_alive(this, task(0), true /* is_serial */);
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
2494 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
2495
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
2496 // We need at least one active thread. If reference processing
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
2497 // is not multi-threaded we use the current (VMThread) thread,
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
2498 // otherwise we use the work gang from the G1CollectedHeap and
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
2499 // we utilize all the worker threads we can.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
2500 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
2501 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
2502 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
2503
8787
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
2504 // Parallel processing task executor.
4093
6071e0581859 7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents: 4072
diff changeset
2505 G1CMRefProcTaskExecutor par_task_executor(g1h, this,
3979
4dfb2df418f2 6484982: G1: process references during evacuation pauses
johnc
parents: 3977
diff changeset
2506 g1h->workers(), active_workers);
8787
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
2507 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
2508
8788
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents: 8787
diff changeset
2509 // 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
2510 // executing the remark task.
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents: 8787
diff changeset
2511 set_concurrency(active_workers);
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents: 8787
diff changeset
2512
8014
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents: 8008
diff changeset
2513 // 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
2514 // 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
2515 // 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
2516 // 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
2517 rp->set_active_mt_degree(active_workers);
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents: 8008
diff changeset
2518
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents: 8008
diff changeset
2519 // Process the weak references.
10405
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing
sla
parents: 10290
diff changeset
2520 const ReferenceProcessorStats& stats =
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing
sla
parents: 10290
diff changeset
2521 rp->process_discovered_references(&g1_is_alive,
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing
sla
parents: 10290
diff changeset
2522 &g1_keep_alive,
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing
sla
parents: 10290
diff changeset
2523 &g1_drain_mark_stack,
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing
sla
parents: 10290
diff changeset
2524 executor,
20190
0982ec23da03 8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents: 17950
diff changeset
2525 g1h->gc_timer_cm(),
0982ec23da03 8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents: 17950
diff changeset
2526 concurrent_gc_id());
10405
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing
sla
parents: 10290
diff changeset
2527 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
2528
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents: 8008
diff changeset
2529 // 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
2530 // 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
2531 // global marking stack.
3975
1847b501ae74 7068215: G1: Print reference processing time during remark
johnc
parents: 3914
diff changeset
2532
1847b501ae74 7068215: G1: Print reference processing time during remark
johnc
parents: 3914
diff changeset
2533 assert(_markStack.overflow() || _markStack.isEmpty(),
1847b501ae74 7068215: G1: Print reference processing time during remark
johnc
parents: 3914
diff changeset
2534 "mark stack should be empty (unless it overflowed)");
8787
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
2535
3975
1847b501ae74 7068215: G1: Print reference processing time during remark
johnc
parents: 3914
diff changeset
2536 if (_markStack.overflow()) {
8014
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents: 8008
diff changeset
2537 // 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
2538 // 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
2539 set_has_overflown();
1847b501ae74 7068215: G1: Print reference processing time during remark
johnc
parents: 3914
diff changeset
2540 }
1847b501ae74 7068215: G1: Print reference processing time during remark
johnc
parents: 3914
diff changeset
2541
8014
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents: 8008
diff changeset
2542 assert(rp->num_q() == active_workers, "why not");
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents: 8008
diff changeset
2543
f90b9bceb8e5 8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents: 8008
diff changeset
2544 rp->enqueue_discovered_references(executor);
3975
1847b501ae74 7068215: G1: Print reference processing time during remark
johnc
parents: 3914
diff changeset
2545
1847b501ae74 7068215: G1: Print reference processing time during remark
johnc
parents: 3914
diff changeset
2546 rp->verify_no_references_recorded();
3979
4dfb2df418f2 6484982: G1: process references during evacuation pauses
johnc
parents: 3977
diff changeset
2547 assert(!rp->discovery_enabled(), "Post condition");
2174
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2548 }
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2549
17750
f53edbc2b728 8036673: G1: Abort weak reference processing if mark stack overflows
pliden
parents: 17736
diff changeset
2550 if (has_overflown()) {
f53edbc2b728 8036673: G1: Abort weak reference processing if mark stack overflows
pliden
parents: 17736
diff changeset
2551 // 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
2552 return;
f53edbc2b728 8036673: G1: Abort weak reference processing if mark stack overflows
pliden
parents: 17736
diff changeset
2553 }
f53edbc2b728 8036673: G1: Abort weak reference processing if mark stack overflows
pliden
parents: 17736
diff changeset
2554
17635
cb7ec2423207 8027454: Do not traverse string table during G1 remark when treating them as strong roots during initial mark
tschatzl
parents: 17634
diff changeset
2555 g1h->unlink_string_and_symbol_table(&g1_is_alive,
cb7ec2423207 8027454: Do not traverse string table during G1 remark when treating them as strong roots during initial mark
tschatzl
parents: 17634
diff changeset
2556 /* process_strings */ false, // currently strings are always roots
cb7ec2423207 8027454: Do not traverse string table during G1 remark when treating them as strong roots during initial mark
tschatzl
parents: 17634
diff changeset
2557 /* process_symbols */ true);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2558 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2559
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2560 void ConcurrentMark::swapMarkBitMaps() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2561 CMBitMapRO* temp = _prevMarkBitMap;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2562 _prevMarkBitMap = (CMBitMapRO*)_nextMarkBitMap;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2563 _nextMarkBitMap = (CMBitMap*) temp;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2564 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2565
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2566 class CMRemarkTask: public AbstractGangTask {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2567 private:
8787
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
2568 ConcurrentMark* _cm;
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
2569 bool _is_serial;
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2570 public:
4728
441e946dc1af 7121618: Change type of number of GC workers to unsigned int.
jmasa
parents: 4711
diff changeset
2571 void work(uint worker_id) {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2572 // Since all available tasks are actually started, we should
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2573 // 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
2574 if (worker_id < _cm->active_tasks()) {
441e946dc1af 7121618: Change type of number of GC workers to unsigned int.
jmasa
parents: 4711
diff changeset
2575 CMTask* task = _cm->task(worker_id);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2576 task->record_start_time();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2577 do {
2174
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
2578 task->do_marking_step(1000000000.0 /* something very large */,
8787
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
2579 true /* do_termination */,
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
2580 _is_serial);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2581 } while (task->has_aborted() && !_cm->has_overflown());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2582 // 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
2583 // want to abort remark and do concurrent marking again.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2584 task->record_end_time();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2585 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2586 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2587
8787
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
2588 CMRemarkTask(ConcurrentMark* cm, int active_workers, bool is_serial) :
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
2589 AbstractGangTask("Par Remark"), _cm(cm), _is_serial(is_serial) {
4711
adedfbbf0360 7120038: G1: ParallelGCThreads==0 is broken
johnc
parents: 4097
diff changeset
2590 _cm->terminator()->reset_for_reuse(active_workers);
4095
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents: 4093
diff changeset
2591 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2592 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2593
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2594 void ConcurrentMark::checkpointRootsFinalWork() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2595 ResourceMark rm;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2596 HandleMark hm;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2597 G1CollectedHeap* g1h = G1CollectedHeap::heap();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2598
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2599 g1h->ensure_parsability(false);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2600
1833
8b10f48633dc 6984287: Regularize how GC parallel workers are specified.
jmasa
parents: 1719
diff changeset
2601 if (G1CollectedHeap::use_parallel_gc_threads()) {
989
148e5441d916 6863023: need non-perm oops in code cache for JSR 292
jrose
parents: 912
diff changeset
2602 G1CollectedHeap::StrongRootsScope srs(g1h);
4095
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents: 4093
diff changeset
2603 // 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
2604 uint active_workers = g1h->workers()->active_workers();
4095
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents: 4093
diff changeset
2605 if (active_workers == 0) {
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents: 4093
diff changeset
2606 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
2607 active_workers = (uint) ParallelGCThreads;
4095
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents: 4093
diff changeset
2608 g1h->workers()->set_active_workers(active_workers);
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents: 4093
diff changeset
2609 }
8788
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents: 8787
diff changeset
2610 set_concurrency_and_phase(active_workers, false /* concurrent */);
4095
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents: 4093
diff changeset
2611 // Leave _parallel_marking_threads at it's
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents: 4093
diff changeset
2612 // value originally calculated in the ConcurrentMark
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents: 4093
diff changeset
2613 // constructor and pass values of the active workers
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents: 4093
diff changeset
2614 // through the gang in the task.
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2615
8787
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
2616 CMRemarkTask remarkTask(this, active_workers, false /* is_serial */);
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
2617 // 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
2618 // 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
2619 // immediately.
4095
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents: 4093
diff changeset
2620 g1h->set_par_threads(active_workers);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2621 g1h->workers()->run_task(&remarkTask);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2622 g1h->set_par_threads(0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2623 } else {
989
148e5441d916 6863023: need non-perm oops in code cache for JSR 292
jrose
parents: 912
diff changeset
2624 G1CollectedHeap::StrongRootsScope srs(g1h);
4728
441e946dc1af 7121618: Change type of number of GC workers to unsigned int.
jmasa
parents: 4711
diff changeset
2625 uint active_workers = 1;
8788
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents: 8787
diff changeset
2626 set_concurrency_and_phase(active_workers, false /* concurrent */);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2627
8787
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
2628 // 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
2629 // the thread to execute the remark - serially. We have
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
2630 // to pass true for the is_serial parameter so that
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
2631 // CMTask::do_marking_step() doesn't enter the sync
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
2632 // barriers in the event of an overflow. Doing so will
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
2633 // cause an assert that the current thread is not a
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
2634 // concurrent GC thread.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
2635 CMRemarkTask remarkTask(this, active_workers, true /* is_serial*/);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2636 remarkTask.work(0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2637 }
1023
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
2638 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
2639 guarantee(has_overflown() ||
1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure
johnc
parents: 8788
diff changeset
2640 satb_mq_set.completed_buffers_num() == 0,
1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure
johnc
parents: 8788
diff changeset
2641 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
2642 BOOL_TO_STR(has_overflown()),
1179172e9ec9 8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure
johnc
parents: 8788
diff changeset
2643 satb_mq_set.completed_buffers_num()));
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2644
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2645 print_stats();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2646 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2647
1044
6270f80a7331 6890137: G1: revamp reachable object dump
tonyp
parents: 1030
diff changeset
2648 #ifndef PRODUCT
6270f80a7331 6890137: G1: revamp reachable object dump
tonyp
parents: 1030
diff changeset
2649
1388
7666957bc44d 6937142: G1: improvements to debugging output (S-M)
tonyp
parents: 1359
diff changeset
2650 class PrintReachableOopClosure: public OopClosure {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2651 private:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2652 G1CollectedHeap* _g1h;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2653 outputStream* _out;
3772
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs
johnc
parents: 3771
diff changeset
2654 VerifyOption _vo;
1388
7666957bc44d 6937142: G1: improvements to debugging output (S-M)
tonyp
parents: 1359
diff changeset
2655 bool _all;
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2656
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2657 public:
3772
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs
johnc
parents: 3771
diff changeset
2658 PrintReachableOopClosure(outputStream* out,
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs
johnc
parents: 3771
diff changeset
2659 VerifyOption vo,
1388
7666957bc44d 6937142: G1: improvements to debugging output (S-M)
tonyp
parents: 1359
diff changeset
2660 bool all) :
1044
6270f80a7331 6890137: G1: revamp reachable object dump
tonyp
parents: 1030
diff changeset
2661 _g1h(G1CollectedHeap::heap()),
3772
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs
johnc
parents: 3771
diff changeset
2662 _out(out), _vo(vo), _all(all) { }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2663
845
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents: 831
diff changeset
2664 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
2665 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
2666
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents: 831
diff changeset
2667 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
2668 oop obj = oopDesc::load_decode_heap_oop(p);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2669 const char* str = NULL;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2670 const char* str2 = "";
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2671
1388
7666957bc44d 6937142: G1: improvements to debugging output (S-M)
tonyp
parents: 1359
diff changeset
2672 if (obj == NULL) {
7666957bc44d 6937142: G1: improvements to debugging output (S-M)
tonyp
parents: 1359
diff changeset
2673 str = "";
7666957bc44d 6937142: G1: improvements to debugging output (S-M)
tonyp
parents: 1359
diff changeset
2674 } else if (!_g1h->is_in_g1_reserved(obj)) {
7666957bc44d 6937142: G1: improvements to debugging output (S-M)
tonyp
parents: 1359
diff changeset
2675 str = " O";
7666957bc44d 6937142: G1: improvements to debugging output (S-M)
tonyp
parents: 1359
diff changeset
2676 } else {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2677 HeapRegion* hr = _g1h->heap_region_containing(obj);
1023
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
2678 guarantee(hr != NULL, "invariant");
6254
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents: 6220
diff changeset
2679 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
2680 bool marked = _g1h->is_marked(obj, _vo);
1044
6270f80a7331 6890137: G1: revamp reachable object dump
tonyp
parents: 1030
diff changeset
2681
6270f80a7331 6890137: G1: revamp reachable object dump
tonyp
parents: 1030
diff changeset
2682 if (over_tams) {
1388
7666957bc44d 6937142: G1: improvements to debugging output (S-M)
tonyp
parents: 1359
diff changeset
2683 str = " >";
7666957bc44d 6937142: G1: improvements to debugging output (S-M)
tonyp
parents: 1359
diff changeset
2684 if (marked) {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2685 str2 = " AND MARKED";
1044
6270f80a7331 6890137: G1: revamp reachable object dump
tonyp
parents: 1030
diff changeset
2686 }
1388
7666957bc44d 6937142: G1: improvements to debugging output (S-M)
tonyp
parents: 1359
diff changeset
2687 } else if (marked) {
7666957bc44d 6937142: G1: improvements to debugging output (S-M)
tonyp
parents: 1359
diff changeset
2688 str = " M";
1044
6270f80a7331 6890137: G1: revamp reachable object dump
tonyp
parents: 1030
diff changeset
2689 } else {
1388
7666957bc44d 6937142: G1: improvements to debugging output (S-M)
tonyp
parents: 1359
diff changeset
2690 str = " NOT";
1044
6270f80a7331 6890137: G1: revamp reachable object dump
tonyp
parents: 1030
diff changeset
2691 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2692 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2693
1388
7666957bc44d 6937142: G1: improvements to debugging output (S-M)
tonyp
parents: 1359
diff changeset
2694 _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
2695 p2i(p), p2i((void*) obj), str, str2);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2696 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2697 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2698
1388
7666957bc44d 6937142: G1: improvements to debugging output (S-M)
tonyp
parents: 1359
diff changeset
2699 class PrintReachableObjectClosure : public ObjectClosure {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2700 private:
3772
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs
johnc
parents: 3771
diff changeset
2701 G1CollectedHeap* _g1h;
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs
johnc
parents: 3771
diff changeset
2702 outputStream* _out;
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs
johnc
parents: 3771
diff changeset
2703 VerifyOption _vo;
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs
johnc
parents: 3771
diff changeset
2704 bool _all;
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs
johnc
parents: 3771
diff changeset
2705 HeapRegion* _hr;
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2706
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2707 public:
3772
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs
johnc
parents: 3771
diff changeset
2708 PrintReachableObjectClosure(outputStream* out,
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs
johnc
parents: 3771
diff changeset
2709 VerifyOption vo,
1388
7666957bc44d 6937142: G1: improvements to debugging output (S-M)
tonyp
parents: 1359
diff changeset
2710 bool all,
7666957bc44d 6937142: G1: improvements to debugging output (S-M)
tonyp
parents: 1359
diff changeset
2711 HeapRegion* hr) :
3772
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs
johnc
parents: 3771
diff changeset
2712 _g1h(G1CollectedHeap::heap()),
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs
johnc
parents: 3771
diff changeset
2713 _out(out), _vo(vo), _all(all), _hr(hr) { }
1388
7666957bc44d 6937142: G1: improvements to debugging output (S-M)
tonyp
parents: 1359
diff changeset
2714
7666957bc44d 6937142: G1: improvements to debugging output (S-M)
tonyp
parents: 1359
diff changeset
2715 void do_object(oop o) {
6254
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents: 6220
diff changeset
2716 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
2717 bool marked = _g1h->is_marked(o, _vo);
1388
7666957bc44d 6937142: G1: improvements to debugging output (S-M)
tonyp
parents: 1359
diff changeset
2718 bool print_it = _all || over_tams || marked;
7666957bc44d 6937142: G1: improvements to debugging output (S-M)
tonyp
parents: 1359
diff changeset
2719
7666957bc44d 6937142: G1: improvements to debugging output (S-M)
tonyp
parents: 1359
diff changeset
2720 if (print_it) {
7666957bc44d 6937142: G1: improvements to debugging output (S-M)
tonyp
parents: 1359
diff changeset
2721 _out->print_cr(" "PTR_FORMAT"%s",
17937
78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents: 17844
diff changeset
2722 p2i((void *)o), (over_tams) ? " >" : (marked) ? " M" : "");
3772
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs
johnc
parents: 3771
diff changeset
2723 PrintReachableOopClosure oopCl(_out, _vo, _all);
6725
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6254
diff changeset
2724 o->oop_iterate_no_header(&oopCl);
1388
7666957bc44d 6937142: G1: improvements to debugging output (S-M)
tonyp
parents: 1359
diff changeset
2725 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2726 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2727 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2728
1388
7666957bc44d 6937142: G1: improvements to debugging output (S-M)
tonyp
parents: 1359
diff changeset
2729 class PrintReachableRegionClosure : public HeapRegionClosure {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2730 private:
6254
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents: 6220
diff changeset
2731 G1CollectedHeap* _g1h;
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents: 6220
diff changeset
2732 outputStream* _out;
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents: 6220
diff changeset
2733 VerifyOption _vo;
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents: 6220
diff changeset
2734 bool _all;
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2735
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2736 public:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2737 bool doHeapRegion(HeapRegion* hr) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2738 HeapWord* b = hr->bottom();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2739 HeapWord* e = hr->end();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2740 HeapWord* t = hr->top();
6254
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents: 6220
diff changeset
2741 HeapWord* p = _g1h->top_at_mark_start(hr, _vo);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2742 _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
2743 "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
2744 _out->cr();
7666957bc44d 6937142: G1: improvements to debugging output (S-M)
tonyp
parents: 1359
diff changeset
2745
7666957bc44d 6937142: G1: improvements to debugging output (S-M)
tonyp
parents: 1359
diff changeset
2746 HeapWord* from = b;
7666957bc44d 6937142: G1: improvements to debugging output (S-M)
tonyp
parents: 1359
diff changeset
2747 HeapWord* to = t;
7666957bc44d 6937142: G1: improvements to debugging output (S-M)
tonyp
parents: 1359
diff changeset
2748
7666957bc44d 6937142: G1: improvements to debugging output (S-M)
tonyp
parents: 1359
diff changeset
2749 if (to > from) {
17937
78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents: 17844
diff changeset
2750 _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
2751 _out->cr();
3772
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs
johnc
parents: 3771
diff changeset
2752 PrintReachableObjectClosure ocl(_out, _vo, _all, hr);
1388
7666957bc44d 6937142: G1: improvements to debugging output (S-M)
tonyp
parents: 1359
diff changeset
2753 hr->object_iterate_mem_careful(MemRegion(from, to), &ocl);
7666957bc44d 6937142: G1: improvements to debugging output (S-M)
tonyp
parents: 1359
diff changeset
2754 _out->cr();
7666957bc44d 6937142: G1: improvements to debugging output (S-M)
tonyp
parents: 1359
diff changeset
2755 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2756
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2757 return false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2758 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2759
3772
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs
johnc
parents: 3771
diff changeset
2760 PrintReachableRegionClosure(outputStream* out,
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs
johnc
parents: 3771
diff changeset
2761 VerifyOption vo,
1388
7666957bc44d 6937142: G1: improvements to debugging output (S-M)
tonyp
parents: 1359
diff changeset
2762 bool all) :
6254
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents: 6220
diff changeset
2763 _g1h(G1CollectedHeap::heap()), _out(out), _vo(vo), _all(all) { }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2764 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2765
1388
7666957bc44d 6937142: G1: improvements to debugging output (S-M)
tonyp
parents: 1359
diff changeset
2766 void ConcurrentMark::print_reachable(const char* str,
3772
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs
johnc
parents: 3771
diff changeset
2767 VerifyOption vo,
1388
7666957bc44d 6937142: G1: improvements to debugging output (S-M)
tonyp
parents: 1359
diff changeset
2768 bool all) {
7666957bc44d 6937142: G1: improvements to debugging output (S-M)
tonyp
parents: 1359
diff changeset
2769 gclog_or_tty->cr();
7666957bc44d 6937142: G1: improvements to debugging output (S-M)
tonyp
parents: 1359
diff changeset
2770 gclog_or_tty->print_cr("== Doing heap dump... ");
1044
6270f80a7331 6890137: G1: revamp reachable object dump
tonyp
parents: 1030
diff changeset
2771
6270f80a7331 6890137: G1: revamp reachable object dump
tonyp
parents: 1030
diff changeset
2772 if (G1PrintReachableBaseFile == NULL) {
6270f80a7331 6890137: G1: revamp reachable object dump
tonyp
parents: 1030
diff changeset
2773 gclog_or_tty->print_cr(" #### error: no base file defined");
6270f80a7331 6890137: G1: revamp reachable object dump
tonyp
parents: 1030
diff changeset
2774 return;
6270f80a7331 6890137: G1: revamp reachable object dump
tonyp
parents: 1030
diff changeset
2775 }
6270f80a7331 6890137: G1: revamp reachable object dump
tonyp
parents: 1030
diff changeset
2776
6270f80a7331 6890137: G1: revamp reachable object dump
tonyp
parents: 1030
diff changeset
2777 if (strlen(G1PrintReachableBaseFile) + 1 + strlen(str) >
6270f80a7331 6890137: G1: revamp reachable object dump
tonyp
parents: 1030
diff changeset
2778 (JVM_MAXPATHLEN - 1)) {
6270f80a7331 6890137: G1: revamp reachable object dump
tonyp
parents: 1030
diff changeset
2779 gclog_or_tty->print_cr(" #### error: file name too long");
6270f80a7331 6890137: G1: revamp reachable object dump
tonyp
parents: 1030
diff changeset
2780 return;
6270f80a7331 6890137: G1: revamp reachable object dump
tonyp
parents: 1030
diff changeset
2781 }
6270f80a7331 6890137: G1: revamp reachable object dump
tonyp
parents: 1030
diff changeset
2782
6270f80a7331 6890137: G1: revamp reachable object dump
tonyp
parents: 1030
diff changeset
2783 char file_name[JVM_MAXPATHLEN];
6270f80a7331 6890137: G1: revamp reachable object dump
tonyp
parents: 1030
diff changeset
2784 sprintf(file_name, "%s.%s", G1PrintReachableBaseFile, str);
6270f80a7331 6890137: G1: revamp reachable object dump
tonyp
parents: 1030
diff changeset
2785 gclog_or_tty->print_cr(" dumping to file %s", file_name);
6270f80a7331 6890137: G1: revamp reachable object dump
tonyp
parents: 1030
diff changeset
2786
6270f80a7331 6890137: G1: revamp reachable object dump
tonyp
parents: 1030
diff changeset
2787 fileStream fout(file_name);
6270f80a7331 6890137: G1: revamp reachable object dump
tonyp
parents: 1030
diff changeset
2788 if (!fout.is_open()) {
6270f80a7331 6890137: G1: revamp reachable object dump
tonyp
parents: 1030
diff changeset
2789 gclog_or_tty->print_cr(" #### error: could not open file");
6270f80a7331 6890137: G1: revamp reachable object dump
tonyp
parents: 1030
diff changeset
2790 return;
6270f80a7331 6890137: G1: revamp reachable object dump
tonyp
parents: 1030
diff changeset
2791 }
6270f80a7331 6890137: G1: revamp reachable object dump
tonyp
parents: 1030
diff changeset
2792
6270f80a7331 6890137: G1: revamp reachable object dump
tonyp
parents: 1030
diff changeset
2793 outputStream* out = &fout;
6254
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents: 6220
diff changeset
2794 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
2795 out->cr();
6270f80a7331 6890137: G1: revamp reachable object dump
tonyp
parents: 1030
diff changeset
2796
1388
7666957bc44d 6937142: G1: improvements to debugging output (S-M)
tonyp
parents: 1359
diff changeset
2797 out->print_cr("--- ITERATING OVER REGIONS");
1044
6270f80a7331 6890137: G1: revamp reachable object dump
tonyp
parents: 1030
diff changeset
2798 out->cr();
3772
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs
johnc
parents: 3771
diff changeset
2799 PrintReachableRegionClosure rcl(out, vo, all);
1388
7666957bc44d 6937142: G1: improvements to debugging output (S-M)
tonyp
parents: 1359
diff changeset
2800 _g1h->heap_region_iterate(&rcl);
1044
6270f80a7331 6890137: G1: revamp reachable object dump
tonyp
parents: 1030
diff changeset
2801 out->cr();
6270f80a7331 6890137: G1: revamp reachable object dump
tonyp
parents: 1030
diff changeset
2802
6270f80a7331 6890137: G1: revamp reachable object dump
tonyp
parents: 1030
diff changeset
2803 gclog_or_tty->print_cr(" done");
1388
7666957bc44d 6937142: G1: improvements to debugging output (S-M)
tonyp
parents: 1359
diff changeset
2804 gclog_or_tty->flush();
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2805 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2806
1044
6270f80a7331 6890137: G1: revamp reachable object dump
tonyp
parents: 1030
diff changeset
2807 #endif // PRODUCT
6270f80a7331 6890137: G1: revamp reachable object dump
tonyp
parents: 1030
diff changeset
2808
4787
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2809 void ConcurrentMark::clearRangePrevBitmap(MemRegion mr) {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2810 // 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
2811 // the cast.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2812 ((CMBitMap*)_prevMarkBitMap)->clearRange(mr);
4787
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2813 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2814
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2815 void ConcurrentMark::clearRangeNextBitmap(MemRegion mr) {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2816 _nextMarkBitMap->clearRange(mr);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2817 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2818
4787
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2819 void ConcurrentMark::clearRangeBothBitmaps(MemRegion mr) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2820 clearRangePrevBitmap(mr);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2821 clearRangeNextBitmap(mr);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2822 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2823
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2824 HeapRegion*
6862
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 6812
diff changeset
2825 ConcurrentMark::claim_region(uint worker_id) {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2826 // "checkpoint" the finger
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2827 HeapWord* finger = _finger;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2828
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2829 // _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
2830 // yield points.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2831 while (finger < _heap_end) {
1023
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
2832 assert(_g1h->is_in_g1_reserved(finger), "invariant");
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2833
3771
842b840e67db 7046558: G1: concurrent marking optimizations
tonyp
parents: 3378
diff changeset
2834 // Note on how this code handles humongous regions. In the
842b840e67db 7046558: G1: concurrent marking optimizations
tonyp
parents: 3378
diff changeset
2835 // normal case the finger will reach the start of a "starts
842b840e67db 7046558: G1: concurrent marking optimizations
tonyp
parents: 3378
diff changeset
2836 // humongous" (SH) region. Its end will either be the end of the
842b840e67db 7046558: G1: concurrent marking optimizations
tonyp
parents: 3378
diff changeset
2837 // last "continues humongous" (CH) region in the sequence, or the
842b840e67db 7046558: G1: concurrent marking optimizations
tonyp
parents: 3378
diff changeset
2838 // 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
2839 // the sequence). That way claim_region() will skip over the CH
842b840e67db 7046558: G1: concurrent marking optimizations
tonyp
parents: 3378
diff changeset
2840 // regions. However, there is a subtle race between a CM thread
842b840e67db 7046558: G1: concurrent marking optimizations
tonyp
parents: 3378
diff changeset
2841 // executing this method and a mutator thread doing a humongous
842b840e67db 7046558: G1: concurrent marking optimizations
tonyp
parents: 3378
diff changeset
2842 // object allocation. The two are not mutually exclusive as the CM
842b840e67db 7046558: G1: concurrent marking optimizations
tonyp
parents: 3378
diff changeset
2843 // thread does not need to hold the Heap_lock when it gets
842b840e67db 7046558: G1: concurrent marking optimizations
tonyp
parents: 3378
diff changeset
2844 // here. So there is a chance that claim_region() will come across
842b840e67db 7046558: G1: concurrent marking optimizations
tonyp
parents: 3378
diff changeset
2845 // 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
2846 // region. In the former case, it will either
842b840e67db 7046558: G1: concurrent marking optimizations
tonyp
parents: 3378
diff changeset
2847 // 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
2848 // visit every subsequent CH region, will find their bitmaps
842b840e67db 7046558: G1: concurrent marking optimizations
tonyp
parents: 3378
diff changeset
2849 // empty, and do nothing, or
842b840e67db 7046558: G1: concurrent marking optimizations
tonyp
parents: 3378
diff changeset
2850 // b) Will observe the update of the region's end (in which case
842b840e67db 7046558: G1: concurrent marking optimizations
tonyp
parents: 3378
diff changeset
2851 // it will skip the subsequent CH regions).
842b840e67db 7046558: G1: concurrent marking optimizations
tonyp
parents: 3378
diff changeset
2852 // If it comes across a region that suddenly becomes CH, the
842b840e67db 7046558: G1: concurrent marking optimizations
tonyp
parents: 3378
diff changeset
2853 // scenario will be similar to b). So, the race between
842b840e67db 7046558: G1: concurrent marking optimizations
tonyp
parents: 3378
diff changeset
2854 // claim_region() and a humongous object allocation might force us
842b840e67db 7046558: G1: concurrent marking optimizations
tonyp
parents: 3378
diff changeset
2855 // to do a bit of unnecessary work (due to some unnecessary bitmap
842b840e67db 7046558: G1: concurrent marking optimizations
tonyp
parents: 3378
diff changeset
2856 // iterations) but it should not introduce and correctness issues.
842b840e67db 7046558: G1: concurrent marking optimizations
tonyp
parents: 3378
diff changeset
2857 HeapRegion* curr_region = _g1h->heap_region_containing_raw(finger);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2858 HeapWord* bottom = curr_region->bottom();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2859 HeapWord* end = curr_region->end();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2860 HeapWord* limit = curr_region->next_top_at_mark_start();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2861
3771
842b840e67db 7046558: G1: concurrent marking optimizations
tonyp
parents: 3378
diff changeset
2862 if (verbose_low()) {
6862
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 6812
diff changeset
2863 gclog_or_tty->print_cr("[%u] curr_region = "PTR_FORMAT" "
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2864 "["PTR_FORMAT", "PTR_FORMAT"), "
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2865 "limit = "PTR_FORMAT,
17937
78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents: 17844
diff changeset
2866 worker_id, p2i(curr_region), p2i(bottom), p2i(end), p2i(limit));
3771
842b840e67db 7046558: G1: concurrent marking optimizations
tonyp
parents: 3378
diff changeset
2867 }
842b840e67db 7046558: G1: concurrent marking optimizations
tonyp
parents: 3378
diff changeset
2868
842b840e67db 7046558: G1: concurrent marking optimizations
tonyp
parents: 3378
diff changeset
2869 // Is the gap between reading the finger and doing the CAS too long?
842b840e67db 7046558: G1: concurrent marking optimizations
tonyp
parents: 3378
diff changeset
2870 HeapWord* res = (HeapWord*) Atomic::cmpxchg_ptr(end, &_finger, finger);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2871 if (res == finger) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2872 // we succeeded
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2873
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2874 // notice that _finger == end cannot be guaranteed here since,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2875 // someone else might have moved the finger even further
1023
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
2876 assert(_finger >= end, "the finger should have moved forward");
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2877
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
2878 if (verbose_low()) {
6862
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 6812
diff changeset
2879 gclog_or_tty->print_cr("[%u] we were successful with region = "
17937
78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents: 17844
diff changeset
2880 PTR_FORMAT, worker_id, p2i(curr_region));
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
2881 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2882
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2883 if (limit > bottom) {
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
2884 if (verbose_low()) {
6862
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 6812
diff changeset
2885 gclog_or_tty->print_cr("[%u] region "PTR_FORMAT" is not empty, "
17937
78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents: 17844
diff changeset
2886 "returning it ", worker_id, p2i(curr_region));
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
2887 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2888 return curr_region;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2889 } else {
1023
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
2890 assert(limit == bottom,
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
2891 "the region limit should be at bottom");
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
2892 if (verbose_low()) {
6862
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 6812
diff changeset
2893 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
2894 "returning NULL", worker_id, p2i(curr_region));
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
2895 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2896 // we return NULL and the caller should try calling
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2897 // claim_region() again.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2898 return NULL;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2899 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2900 } else {
1023
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
2901 assert(_finger > finger, "the finger should have moved forward");
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
2902 if (verbose_low()) {
6862
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 6812
diff changeset
2903 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
2904 "global finger = "PTR_FORMAT", "
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2905 "our finger = "PTR_FORMAT,
17937
78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents: 17844
diff changeset
2906 worker_id, p2i(_finger), p2i(finger));
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
2907 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2908
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2909 // read it again
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2910 finger = _finger;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2911 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2912 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2913
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2914 return NULL;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2915 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2916
4787
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2917 #ifndef PRODUCT
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2918 enum VerifyNoCSetOopsPhase {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2919 VerifyNoCSetOopsStack,
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2920 VerifyNoCSetOopsQueues,
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2921 VerifyNoCSetOopsSATBCompleted,
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2922 VerifyNoCSetOopsSATBThread
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2923 };
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2924
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2925 class VerifyNoCSetOopsClosure : public OopClosure, public ObjectClosure {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2926 private:
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2927 G1CollectedHeap* _g1h;
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2928 VerifyNoCSetOopsPhase _phase;
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2929 int _info;
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2930
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2931 const char* phase_str() {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2932 switch (_phase) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2933 case VerifyNoCSetOopsStack: return "Stack";
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2934 case VerifyNoCSetOopsQueues: return "Queue";
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2935 case VerifyNoCSetOopsSATBCompleted: return "Completed SATB Buffers";
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2936 case VerifyNoCSetOopsSATBThread: return "Thread SATB Buffers";
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2937 default: ShouldNotReachHere();
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2938 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2939 return NULL;
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2940 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2941
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2942 void do_object_work(oop obj) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2943 guarantee(!_g1h->obj_in_cs(obj),
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2944 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
2945 p2i((void*) obj), phase_str(), _info));
4787
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2946 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2947
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2948 public:
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2949 VerifyNoCSetOopsClosure() : _g1h(G1CollectedHeap::heap()) { }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2950
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2951 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
2952 _phase = phase;
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2953 _info = info;
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2954 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2955
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2956 virtual void do_oop(oop* p) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2957 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
2958 do_object_work(obj);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2959 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2960
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2961 virtual void do_oop(narrowOop* p) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2962 // 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
2963 // stacks and SATB buffers.
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2964 ShouldNotReachHere();
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2965 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2966
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2967 virtual void do_object(oop obj) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2968 do_object_work(obj);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2969 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2970 };
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2971
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2972 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
2973 bool verify_enqueued_buffers,
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2974 bool verify_thread_buffers,
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2975 bool verify_fingers) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2976 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
2977 if (!G1CollectedHeap::heap()->mark_in_progress()) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2978 return;
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2979 }
1835
4805b9f4779e 6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents: 1833
diff changeset
2980
4787
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2981 VerifyNoCSetOopsClosure cl;
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2982
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2983 if (verify_stacks) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2984 // Verify entries on the global mark stack
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2985 cl.set_phase(VerifyNoCSetOopsStack);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2986 _markStack.oops_do(&cl);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2987
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2988 // 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
2989 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
2990 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
2991 CMTaskQueue* queue = _task_queues->queue(i);
4787
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2992 queue->oops_do(&cl);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2993 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2994 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2995
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2996 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
2997
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2998 // Verify entries on the enqueued SATB buffers
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
2999 if (verify_enqueued_buffers) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
3000 cl.set_phase(VerifyNoCSetOopsSATBCompleted);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
3001 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
3002 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
3003
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
3004 // 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
3005 if (verify_thread_buffers) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
3006 cl.set_phase(VerifyNoCSetOopsSATBThread);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
3007 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
3008 }
4805b9f4779e 6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents: 1833
diff changeset
3009
4787
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
3010 if (verify_fingers) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
3011 // Verify the global finger
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
3012 HeapWord* global_finger = finger();
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
3013 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
3014 // 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
3015 // 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
3016 // 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
3017 // which subsequently becomes continues humongous. If that
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
3018 // 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
3019 // 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
3020 // not hold any more.
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
3021 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
3022 guarantee(global_finger == global_hr->bottom(),
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
3023 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
3024 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
3025 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
3026
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
3027 // Verify the task fingers
6862
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 6812
diff changeset
3028 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
3029 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
3030 CMTask* task = _tasks[i];
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
3031 HeapWord* task_finger = task->finger();
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
3032 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
3033 // 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
3034 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
3035 guarantee(task_finger == task_hr->bottom() ||
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
3036 !task_hr->in_collection_set(),
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
3037 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
3038 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
3039 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
3040 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
3041 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3042 }
4787
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 4783
diff changeset
3043 #endif // PRODUCT
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3044
4836
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3045 // Aggregate the counting data that was constructed concurrently
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3046 // with marking.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3047 class AggregateCountDataHRClosure: public HeapRegionClosure {
6812
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 6750
diff changeset
3048 G1CollectedHeap* _g1h;
4836
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3049 ConcurrentMark* _cm;
6812
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 6750
diff changeset
3050 CardTableModRefBS* _ct_bs;
4836
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3051 BitMap* _cm_card_bm;
6862
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 6812
diff changeset
3052 uint _max_worker_id;
4836
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3053
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3054 public:
6812
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 6750
diff changeset
3055 AggregateCountDataHRClosure(G1CollectedHeap* g1h,
4836
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3056 BitMap* cm_card_bm,
6862
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 6812
diff changeset
3057 uint max_worker_id) :
6812
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 6750
diff changeset
3058 _g1h(g1h), _cm(g1h->concurrent_mark()),
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 6750
diff changeset
3059 _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
3060 _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
3061
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3062 bool doHeapRegion(HeapRegion* hr) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3063 if (hr->continuesHumongous()) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3064 // 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
3065 // associated "starts humongous" region is processed.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3066 // Note that we cannot rely on their associated
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3067 // "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
3068 // 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
3069 // iteration, a "continues humongous" region might be visited
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3070 // before its associated "starts humongous".
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3071 return false;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3072 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3073
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3074 HeapWord* start = hr->bottom();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3075 HeapWord* limit = hr->next_top_at_mark_start();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3076 HeapWord* end = hr->end();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3077
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3078 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
3079 err_msg("Preconditions not met - "
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3080 "start: "PTR_FORMAT", limit: "PTR_FORMAT", "
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3081 "top: "PTR_FORMAT", end: "PTR_FORMAT,
17937
78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents: 17844
diff changeset
3082 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
3083
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3084 assert(hr->next_marked_bytes() == 0, "Precondition");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3085
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3086 if (start == limit) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3087 // 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
3088 return false;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3089 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3090
6812
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 6750
diff changeset
3091 // 'start' should be in the heap.
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 6750
diff changeset
3092 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
3093 // '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
3094 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
3095
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3096 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
3097 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
3098 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
3099
6812
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 6750
diff changeset
3100 // 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
3101 // 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
3102 // the object ending at ntams.
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 6750
diff changeset
3103 // 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
3104 // 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
3105 // limit_idx will then correspond to a (non-existent) card
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 6750
diff changeset
3106 // that is also outside the heap.
988bf00cc564 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 6750
diff changeset
3107 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
3108 limit_idx += 1;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3109 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3110
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3111 assert(limit_idx <= end_idx, "or else use atomics");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3112
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3113 // 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
3114 uint hrs_index = hr->hrs_index();
4836
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3115 size_t marked_bytes = 0;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3116
6862
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 6812
diff changeset
3117 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
3118 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
3119 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
3120
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3121 // 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
3122 // add it to the running total for this region.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3123 marked_bytes += marked_bytes_array[hrs_index];
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3124
6862
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 6812
diff changeset
3125 // 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
3126 // into the global card bitmap.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3127 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
3128
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3129 while (scan_idx < limit_idx) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3130 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
3131 _cm_card_bm->set_bit(scan_idx);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3132 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
3133
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3134 // 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
3135 // 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
3136 // 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
3137 // 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
3138 // passed in for left offset here.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3139 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
3140 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
3141 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3142 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3143
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3144 // Update the marked bytes for this region.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3145 hr->add_to_marked_bytes(marked_bytes);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3146
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3147 // Next heap region
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3148 return false;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3149 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3150 };
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3151
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3152 class G1AggregateCountDataTask: public AbstractGangTask {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3153 protected:
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3154 G1CollectedHeap* _g1h;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3155 ConcurrentMark* _cm;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3156 BitMap* _cm_card_bm;
6862
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 6812
diff changeset
3157 uint _max_worker_id;
4836
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3158 int _active_workers;
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3159
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3160 public:
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3161 G1AggregateCountDataTask(G1CollectedHeap* g1h,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3162 ConcurrentMark* cm,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3163 BitMap* cm_card_bm,
6862
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 6812
diff changeset
3164 uint max_worker_id,
4836
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3165 int n_workers) :
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3166 AbstractGangTask("Count Aggregation"),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3167 _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
3168 _max_worker_id(max_worker_id),
4836
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3169 _active_workers(n_workers) { }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3170
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3171 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
3172 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
3173
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3174 if (G1CollectedHeap::use_parallel_gc_threads()) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3175 _g1h->heap_region_par_iterate_chunked(&cl, worker_id,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3176 _active_workers,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3177 HeapRegion::AggregateCountClaimValue);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3178 } else {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3179 _g1h->heap_region_iterate(&cl);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3180 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3181 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3182 };
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3183
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3184
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3185 void ConcurrentMark::aggregate_count_data() {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3186 int n_workers = (G1CollectedHeap::use_parallel_gc_threads() ?
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3187 _g1h->workers()->active_workers() :
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3188 1);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3189
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3190 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
3191 _max_worker_id, n_workers);
4836
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 if (G1CollectedHeap::use_parallel_gc_threads()) {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3194 assert(_g1h->check_heap_region_claim_values(HeapRegion::InitialClaimValue),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3195 "sanity check");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3196 _g1h->set_par_threads(n_workers);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3197 _g1h->workers()->run_task(&g1_par_agg_task);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3198 _g1h->set_par_threads(0);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3199
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3200 assert(_g1h->check_heap_region_claim_values(HeapRegion::AggregateCountClaimValue),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3201 "sanity check");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3202 _g1h->reset_heap_region_claim_values();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3203 } else {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3204 g1_par_agg_task.work(0);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3205 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3206 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3207
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3208 // 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
3209 void ConcurrentMark::clear_all_count_data() {
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3210 // 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
3211 // liveness count aggregation (during remark) and the
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3212 // final counting task.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3213 _card_bm.clear();
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 // 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
3216 // of the final counting task.
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3217 _region_bm.clear();
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3218
6010
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents: 6008
diff changeset
3219 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
3220 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
3221
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 6812
diff changeset
3222 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
3223 BitMap* task_card_bm = count_card_bitmap_for(i);
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3224 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
3225
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3226 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
3227 assert(marked_bytes_array != NULL, "uninitialized");
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3228
6010
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents: 6008
diff changeset
3229 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
3230 task_card_bm->clear();
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 }
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3233
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3234 void ConcurrentMark::print_stats() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3235 if (verbose_stats()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3236 gclog_or_tty->print_cr("---------------------------------------------------------------------");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3237 for (size_t i = 0; i < _active_tasks; ++i) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3238 _tasks[i]->print_stats();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3239 gclog_or_tty->print_cr("---------------------------------------------------------------------");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3240 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3241 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3242 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3243
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3244 // abandon current marking iteration due to a Full GC
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3245 void ConcurrentMark::abort() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3246 // Clear all marks to force marking thread to do nothing
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3247 _nextMarkBitMap->clearAll();
4836
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3248 // Clear the liveness counting data
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3249 clear_all_count_data();
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3250 // Empty mark stack
7450
d275c3dc73e6 8004816: G1: Kitchensink failures after marking stack changes
johnc
parents: 7397
diff changeset
3251 reset_marking_state();
6862
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 6812
diff changeset
3252 for (uint i = 0; i < _max_worker_id; ++i) {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3253 _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
3254 }
17949
487f09bf44e0 8040803: G1: Concurrent mark hangs when mark stack overflows
pliden
parents: 17937
diff changeset
3255 _first_overflow_barrier_sync.abort();
487f09bf44e0 8040803: G1: Concurrent mark hangs when mark stack overflows
pliden
parents: 17937
diff changeset
3256 _second_overflow_barrier_sync.abort();
20190
0982ec23da03 8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents: 17950
diff changeset
3257 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
3258 if (!gc_id.is_undefined()) {
0982ec23da03 8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents: 17950
diff changeset
3259 // 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
3260 // 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
3261 _aborted_gc_id = gc_id;
0982ec23da03 8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents: 17950
diff changeset
3262 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3263 _has_aborted = true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3264
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3265 SATBMarkQueueSet& satb_mq_set = JavaThread::satb_mark_queue_set();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3266 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
3267 // 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
3268 // 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
3269 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
3270 false, /* new active value */
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues
tonyp
parents: 1314
diff changeset
3271 satb_mq_set.is_active() /* expected_active */);
10405
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing
sla
parents: 10290
diff changeset
3272
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing
sla
parents: 10290
diff changeset
3273 _g1h->trace_heap_after_concurrent_cycle();
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing
sla
parents: 10290
diff changeset
3274 _g1h->register_concurrent_cycle_end();
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3275 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3276
20190
0982ec23da03 8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents: 17950
diff changeset
3277 const GCId& ConcurrentMark::concurrent_gc_id() {
0982ec23da03 8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents: 17950
diff changeset
3278 if (has_aborted()) {
0982ec23da03 8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents: 17950
diff changeset
3279 return _aborted_gc_id;
0982ec23da03 8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents: 17950
diff changeset
3280 }
0982ec23da03 8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents: 17950
diff changeset
3281 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
3282 }
0982ec23da03 8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents: 17950
diff changeset
3283
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3284 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
3285 NumberSeq& ns) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3286 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
3287 prefix, ns.num(), name, ns.sum()/1000.0, ns.avg());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3288 if (ns.num() > 0) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3289 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
3290 prefix, ns.sd(), ns.maximum());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3291 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3292 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3293
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3294 void ConcurrentMark::print_summary_info() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3295 gclog_or_tty->print_cr(" Concurrent marking:");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3296 print_ms_time_info(" ", "init marks", _init_times);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3297 print_ms_time_info(" ", "remarks", _remark_times);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3298 {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3299 print_ms_time_info(" ", "final marks", _remark_mark_times);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3300 print_ms_time_info(" ", "weak refs", _remark_weak_ref_times);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3301
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3302 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3303 print_ms_time_info(" ", "cleanups", _cleanup_times);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3304 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
3305 _total_counting_time,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3306 (_cleanup_times.num() > 0 ? _total_counting_time * 1000.0 /
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3307 (double)_cleanup_times.num()
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3308 : 0.0));
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3309 if (G1ScrubRemSets) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3310 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
3311 _total_rs_scrub_time,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3312 (_cleanup_times.num() > 0 ? _total_rs_scrub_time * 1000.0 /
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3313 (double)_cleanup_times.num()
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3314 : 0.0));
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3315 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3316 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
3317 (_init_times.sum() + _remark_times.sum() +
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3318 _cleanup_times.sum())/1000.0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3319 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
3320 "(%8.2f s marking).",
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3321 cmThread()->vtime_accum(),
4836
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
3322 cmThread()->vtime_mark_accum());
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3323 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3324
1019
035d2e036a9b 6885041: G1: inconsistent thread dump
tonyp
parents: 993
diff changeset
3325 void ConcurrentMark::print_worker_threads_on(outputStream* st) const {
8008
256d3f43c177 8005875: G1: Kitchensink fails with ParallelGCThreads=0
johnc
parents: 8006
diff changeset
3326 if (use_parallel_marking_threads()) {
256d3f43c177 8005875: G1: Kitchensink fails with ParallelGCThreads=0
johnc
parents: 8006
diff changeset
3327 _parallel_workers->print_worker_threads_on(st);
256d3f43c177 8005875: G1: Kitchensink fails with ParallelGCThreads=0
johnc
parents: 8006
diff changeset
3328 }
1019
035d2e036a9b 6885041: G1: inconsistent thread dump
tonyp
parents: 993
diff changeset
3329 }
035d2e036a9b 6885041: G1: inconsistent thread dump
tonyp
parents: 993
diff changeset
3330
9076
7b835924c31c 8011872: Include Bit Map addresses in the hs_err files
stefank
parents: 8789
diff changeset
3331 void ConcurrentMark::print_on_error(outputStream* st) const {
7b835924c31c 8011872: Include Bit Map addresses in the hs_err files
stefank
parents: 8789
diff changeset
3332 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
3333 p2i(_prevMarkBitMap), p2i(_nextMarkBitMap));
9076
7b835924c31c 8011872: Include Bit Map addresses in the hs_err files
stefank
parents: 8789
diff changeset
3334 _prevMarkBitMap->print_on_error(st, " Prev Bits: ");
7b835924c31c 8011872: Include Bit Map addresses in the hs_err files
stefank
parents: 8789
diff changeset
3335 _nextMarkBitMap->print_on_error(st, " Next Bits: ");
7b835924c31c 8011872: Include Bit Map addresses in the hs_err files
stefank
parents: 8789
diff changeset
3336 }
7b835924c31c 8011872: Include Bit Map addresses in the hs_err files
stefank
parents: 8789
diff changeset
3337
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3338 // 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
3339 bool ConcurrentMark::do_yield_check(uint worker_id) {
20192
581e70386ec9 8039147: Cleanup SuspendibleThreadSet
pliden
parents: 20190
diff changeset
3340 if (SuspendibleThreadSet::should_yield()) {
4728
441e946dc1af 7121618: Change type of number of GC workers to unsigned int.
jmasa
parents: 4711
diff changeset
3341 if (worker_id == 0) {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3342 _g1h->g1_policy()->record_concurrent_pause();
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
3343 }
20192
581e70386ec9 8039147: Cleanup SuspendibleThreadSet
pliden
parents: 20190
diff changeset
3344 SuspendibleThreadSet::yield();
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3345 return true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3346 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3347 return false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3348 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3349 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3350
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3351 bool ConcurrentMark::containing_card_is_marked(void* p) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3352 size_t offset = pointer_delta(p, _g1h->reserved_region().start(), 1);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3353 return _card_bm.at(offset >> CardTableModRefBS::card_shift);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3354 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3355
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3356 bool ConcurrentMark::containing_cards_are_marked(void* start,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3357 void* last) {
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
3358 return containing_card_is_marked(start) &&
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
3359 containing_card_is_marked(last);
342
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 #ifndef PRODUCT
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3363 // for debugging purposes
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3364 void ConcurrentMark::print_finger() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3365 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
3366 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
3367 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
3368 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
3369 }
17937
78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents: 17844
diff changeset
3370 gclog_or_tty->cr();
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3371 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3372 #endif
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3373
3771
842b840e67db 7046558: G1: concurrent marking optimizations
tonyp
parents: 3378
diff changeset
3374 void CMTask::scan_object(oop obj) {
842b840e67db 7046558: G1: concurrent marking optimizations
tonyp
parents: 3378
diff changeset
3375 assert(_nextMarkBitMap->isMarked((HeapWord*) obj), "invariant");
842b840e67db 7046558: G1: concurrent marking optimizations
tonyp
parents: 3378
diff changeset
3376
842b840e67db 7046558: G1: concurrent marking optimizations
tonyp
parents: 3378
diff changeset
3377 if (_cm->verbose_high()) {
6862
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 6812
diff changeset
3378 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
3379 _worker_id, p2i((void*) obj));
3771
842b840e67db 7046558: G1: concurrent marking optimizations
tonyp
parents: 3378
diff changeset
3380 }
842b840e67db 7046558: G1: concurrent marking optimizations
tonyp
parents: 3378
diff changeset
3381
842b840e67db 7046558: G1: concurrent marking optimizations
tonyp
parents: 3378
diff changeset
3382 size_t obj_size = obj->size();
842b840e67db 7046558: G1: concurrent marking optimizations
tonyp
parents: 3378
diff changeset
3383 _words_scanned += obj_size;
842b840e67db 7046558: G1: concurrent marking optimizations
tonyp
parents: 3378
diff changeset
3384
842b840e67db 7046558: G1: concurrent marking optimizations
tonyp
parents: 3378
diff changeset
3385 obj->oop_iterate(_cm_oop_closure);
842b840e67db 7046558: G1: concurrent marking optimizations
tonyp
parents: 3378
diff changeset
3386 statsOnly( ++_objs_scanned );
842b840e67db 7046558: G1: concurrent marking optimizations
tonyp
parents: 3378
diff changeset
3387 check_limits();
842b840e67db 7046558: G1: concurrent marking optimizations
tonyp
parents: 3378
diff changeset
3388 }
842b840e67db 7046558: G1: concurrent marking optimizations
tonyp
parents: 3378
diff changeset
3389
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3390 // Closure for iteration over bitmaps
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3391 class CMBitMapClosure : public BitMapClosure {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3392 private:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3393 // the bitmap that is being iterated over
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3394 CMBitMap* _nextMarkBitMap;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3395 ConcurrentMark* _cm;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3396 CMTask* _task;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3397
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3398 public:
5988
2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents: 4837
diff changeset
3399 CMBitMapClosure(CMTask *task, ConcurrentMark* cm, CMBitMap* nextMarkBitMap) :
2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents: 4837
diff changeset
3400 _task(task), _cm(cm), _nextMarkBitMap(nextMarkBitMap) { }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3401
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3402 bool do_bit(size_t offset) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3403 HeapWord* addr = _nextMarkBitMap->offsetToHeapWord(offset);
1023
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
3404 assert(_nextMarkBitMap->isMarked(addr), "invariant");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
3405 assert( addr < _cm->finger(), "invariant");
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3406
5988
2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents: 4837
diff changeset
3407 statsOnly( _task->increase_objs_found_on_bitmap() );
2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents: 4837
diff changeset
3408 assert(addr >= _task->finger(), "invariant");
2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents: 4837
diff changeset
3409
2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents: 4837
diff changeset
3410 // We move that task's local finger along.
2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents: 4837
diff changeset
3411 _task->move_finger_to(addr);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3412
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3413 _task->scan_object(oop(addr));
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3414 // we only partially drain the local queue and global stack
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3415 _task->drain_local_queue(true);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3416 _task->drain_global_stack(true);
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 // 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
3419 // the iteration
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3420 return !_task->has_aborted();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3421 }
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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3424 // Closure for iterating over objects, currently only used for
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3425 // processing SATB buffers.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3426 class CMObjectClosure : public ObjectClosure {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3427 private:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3428 CMTask* _task;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3429
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3430 public:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3431 void do_object(oop obj) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3432 _task->deal_with_reference(obj);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3433 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3434
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3435 CMObjectClosure(CMTask* task) : _task(task) { }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3436 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3437
3771
842b840e67db 7046558: G1: concurrent marking optimizations
tonyp
parents: 3378
diff changeset
3438 G1CMOopClosure::G1CMOopClosure(G1CollectedHeap* g1h,
842b840e67db 7046558: G1: concurrent marking optimizations
tonyp
parents: 3378
diff changeset
3439 ConcurrentMark* cm,
842b840e67db 7046558: G1: concurrent marking optimizations
tonyp
parents: 3378
diff changeset
3440 CMTask* task)
842b840e67db 7046558: G1: concurrent marking optimizations
tonyp
parents: 3378
diff changeset
3441 : _g1h(g1h), _cm(cm), _task(task) {
842b840e67db 7046558: G1: concurrent marking optimizations
tonyp
parents: 3378
diff changeset
3442 assert(_ref_processor == NULL, "should be initialized to NULL");
842b840e67db 7046558: G1: concurrent marking optimizations
tonyp
parents: 3378
diff changeset
3443
842b840e67db 7046558: G1: concurrent marking optimizations
tonyp
parents: 3378
diff changeset
3444 if (G1UseConcMarkReferenceProcessing) {
3979
4dfb2df418f2 6484982: G1: process references during evacuation pauses
johnc
parents: 3977
diff changeset
3445 _ref_processor = g1h->ref_processor_cm();
3771
842b840e67db 7046558: G1: concurrent marking optimizations
tonyp
parents: 3378
diff changeset
3446 assert(_ref_processor != NULL, "should not be NULL");
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3447 }
3771
842b840e67db 7046558: G1: concurrent marking optimizations
tonyp
parents: 3378
diff changeset
3448 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3449
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3450 void CMTask::setup_for_region(HeapRegion* hr) {
1023
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
3451 // Separated the asserts so that we know which one fires.
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
3452 assert(hr != NULL,
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
3453 "claim_region() should have filtered out continues humongous regions");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
3454 assert(!hr->continuesHumongous(),
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
3455 "claim_region() should have filtered out continues humongous regions");
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3456
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
3457 if (_cm->verbose_low()) {
6862
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 6812
diff changeset
3458 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
3459 _worker_id, p2i(hr));
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
3460 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3461
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3462 _curr_region = hr;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3463 _finger = hr->bottom();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3464 update_region_limit();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3465 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3466
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3467 void CMTask::update_region_limit() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3468 HeapRegion* hr = _curr_region;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3469 HeapWord* bottom = hr->bottom();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3470 HeapWord* limit = hr->next_top_at_mark_start();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3471
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3472 if (limit == bottom) {
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
3473 if (_cm->verbose_low()) {
6862
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 6812
diff changeset
3474 gclog_or_tty->print_cr("[%u] found an empty region "
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3475 "["PTR_FORMAT", "PTR_FORMAT")",
17937
78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents: 17844
diff changeset
3476 _worker_id, p2i(bottom), p2i(limit));
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
3477 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3478 // The region was collected underneath our feet.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3479 // We set the finger to bottom to ensure that the bitmap
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3480 // iteration that will follow this will not do anything.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3481 // (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
3482 // 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
3483 _finger = bottom;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3484 } else if (limit >= _region_limit) {
1023
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
3485 assert(limit >= _finger, "peace of mind");
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3486 } else {
1023
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
3487 assert(limit < _region_limit, "only way to get here");
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3488 // This can happen under some pretty unusual circumstances. An
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3489 // evacuation pause empties the region underneath our feet (NTAMS
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3490 // at bottom). We then do some allocation in the region (NTAMS
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3491 // 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
3492 // alloc region (NTAMS will move to top() and the objects
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3493 // originally below it will be grayed). All objects now marked in
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3494 // the region are explicitly grayed, if below the global finger,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3495 // 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
3496 // set _finger to be limit to ensure that the bitmap iteration
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3497 // doesn't do anything.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3498 _finger = limit;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3499 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3500
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3501 _region_limit = limit;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3502 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3503
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3504 void CMTask::giveup_current_region() {
1023
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
3505 assert(_curr_region != NULL, "invariant");
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
3506 if (_cm->verbose_low()) {
6862
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 6812
diff changeset
3507 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
3508 _worker_id, p2i(_curr_region));
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
3509 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3510 clear_region_fields();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3511 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3512
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3513 void CMTask::clear_region_fields() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3514 // Values for these three fields that indicate that we're not
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3515 // holding on to a region.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3516 _curr_region = NULL;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3517 _finger = NULL;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3518 _region_limit = NULL;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3519 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3520
3771
842b840e67db 7046558: G1: concurrent marking optimizations
tonyp
parents: 3378
diff changeset
3521 void CMTask::set_cm_oop_closure(G1CMOopClosure* cm_oop_closure) {
842b840e67db 7046558: G1: concurrent marking optimizations
tonyp
parents: 3378
diff changeset
3522 if (cm_oop_closure == NULL) {
842b840e67db 7046558: G1: concurrent marking optimizations
tonyp
parents: 3378
diff changeset
3523 assert(_cm_oop_closure != NULL, "invariant");
842b840e67db 7046558: G1: concurrent marking optimizations
tonyp
parents: 3378
diff changeset
3524 } else {
842b840e67db 7046558: G1: concurrent marking optimizations
tonyp
parents: 3378
diff changeset
3525 assert(_cm_oop_closure == NULL, "invariant");
842b840e67db 7046558: G1: concurrent marking optimizations
tonyp
parents: 3378
diff changeset
3526 }
842b840e67db 7046558: G1: concurrent marking optimizations
tonyp
parents: 3378
diff changeset
3527 _cm_oop_closure = cm_oop_closure;
842b840e67db 7046558: G1: concurrent marking optimizations
tonyp
parents: 3378
diff changeset
3528 }
842b840e67db 7046558: G1: concurrent marking optimizations
tonyp
parents: 3378
diff changeset
3529
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3530 void CMTask::reset(CMBitMap* nextMarkBitMap) {
1023
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
3531 guarantee(nextMarkBitMap != NULL, "invariant");
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3532
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
3533 if (_cm->verbose_low()) {
6862
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 6812
diff changeset
3534 gclog_or_tty->print_cr("[%u] resetting", _worker_id);
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
3535 }
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 _nextMarkBitMap = nextMarkBitMap;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3538 clear_region_fields();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3539
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3540 _calls = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3541 _elapsed_time_ms = 0.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3542 _termination_time_ms = 0.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3543 _termination_start_time_ms = 0.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3544
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3545 #if _MARKING_STATS_
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3546 _local_pushes = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3547 _local_pops = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3548 _local_max_size = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3549 _objs_scanned = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3550 _global_pushes = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3551 _global_pops = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3552 _global_max_size = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3553 _global_transfers_to = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3554 _global_transfers_from = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3555 _regions_claimed = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3556 _objs_found_on_bitmap = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3557 _satb_buffers_processed = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3558 _steal_attempts = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3559 _steals = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3560 _aborted = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3561 _aborted_overflow = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3562 _aborted_cm_aborted = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3563 _aborted_yield = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3564 _aborted_timed_out = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3565 _aborted_satb = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3566 _aborted_termination = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3567 #endif // _MARKING_STATS_
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3568 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3569
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3570 bool CMTask::should_exit_termination() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3571 regular_clock_call();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3572 // 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
3573 // 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
3574 // 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
3575 return !_cm->mark_stack_empty() || has_aborted();
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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3578 void CMTask::reached_limit() {
1023
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
3579 assert(_words_scanned >= _words_scanned_limit ||
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
3580 _refs_reached >= _refs_reached_limit ,
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
3581 "shouldn't have been called otherwise");
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3582 regular_clock_call();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3583 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3584
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3585 void CMTask::regular_clock_call() {
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
3586 if (has_aborted()) return;
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3587
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3588 // First, we need to recalculate the words scanned and refs reached
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3589 // limits for the next clock call.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3590 recalculate_limits();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3591
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3592 // During the regular clock call we do the following
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3593
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3594 // (1) If an overflow has been flagged, then we abort.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3595 if (_cm->has_overflown()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3596 set_has_aborted();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3597 return;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3598 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3599
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3600 // 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
3601 // to check anything else. The other steps are only needed during
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3602 // the concurrent marking phase.
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
3603 if (!concurrent()) return;
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3604
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3605 // (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
3606 if (_cm->has_aborted()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3607 set_has_aborted();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3608 statsOnly( ++_aborted_cm_aborted );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3609 return;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3610 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3611
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3612 double curr_time_ms = os::elapsedVTime() * 1000.0;
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 // (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
3615 #if _MARKING_STATS_
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
3616 if (_words_scanned >= _words_scanned_limit) {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3617 ++_clock_due_to_scanning;
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
3618 }
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
3619 if (_refs_reached >= _refs_reached_limit) {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3620 ++_clock_due_to_marking;
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
3621 }
342
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 double last_interval_ms = curr_time_ms - _interval_start_time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3624 _interval_start_time_ms = curr_time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3625 _all_clock_intervals_ms.add(last_interval_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3626
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3627 if (_cm->verbose_medium()) {
6862
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 6812
diff changeset
3628 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
3629 "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
3630 _worker_id, last_interval_ms,
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
3631 _words_scanned,
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
3632 (_words_scanned >= _words_scanned_limit) ? " (*)" : "",
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
3633 _refs_reached,
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
3634 (_refs_reached >= _refs_reached_limit) ? " (*)" : "");
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3635 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3636 #endif // _MARKING_STATS_
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3637
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3638 // (4) We check whether we should yield. If we have to, then we abort.
20192
581e70386ec9 8039147: Cleanup SuspendibleThreadSet
pliden
parents: 20190
diff changeset
3639 if (SuspendibleThreadSet::should_yield()) {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3640 // 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
3641 // responsible for yielding.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3642 set_has_aborted();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3643 statsOnly( ++_aborted_yield );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3644 return;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3645 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3646
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3647 // (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
3648 // then we abort.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3649 double elapsed_time_ms = curr_time_ms - _start_time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3650 if (elapsed_time_ms > _time_target_ms) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3651 set_has_aborted();
2174
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
3652 _has_timed_out = true;
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3653 statsOnly( ++_aborted_timed_out );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3654 return;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3655 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3656
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3657 // (6) Finally, we check whether there are enough completed STAB
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3658 // buffers available for processing. If there are, we abort.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3659 SATBMarkQueueSet& satb_mq_set = JavaThread::satb_mark_queue_set();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3660 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
3661 if (_cm->verbose_low()) {
6862
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 6812
diff changeset
3662 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
3663 _worker_id);
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
3664 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3665 // 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
3666 // the marking task to do so
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3667 set_has_aborted();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3668 statsOnly( ++_aborted_satb );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3669 return;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3670 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3671 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3672
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3673 void CMTask::recalculate_limits() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3674 _real_words_scanned_limit = _words_scanned + words_scanned_period;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3675 _words_scanned_limit = _real_words_scanned_limit;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3676
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3677 _real_refs_reached_limit = _refs_reached + refs_reached_period;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3678 _refs_reached_limit = _real_refs_reached_limit;
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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3681 void CMTask::decrease_limits() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3682 // 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
3683 // 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
3684 // 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
3685 // scanning limit so that the clock is called earlier.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3686
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
3687 if (_cm->verbose_medium()) {
6862
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 6812
diff changeset
3688 gclog_or_tty->print_cr("[%u] decreasing limits", _worker_id);
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
3689 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3690
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3691 _words_scanned_limit = _real_words_scanned_limit -
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3692 3 * words_scanned_period / 4;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3693 _refs_reached_limit = _real_refs_reached_limit -
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3694 3 * refs_reached_period / 4;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3695 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3696
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3697 void CMTask::move_entries_to_global_stack() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3698 // 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
3699 // from the local queue
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3700 oop buffer[global_stack_transfer_size];
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 int n = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3703 oop obj;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3704 while (n < global_stack_transfer_size && _task_queue->pop_local(obj)) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3705 buffer[n] = obj;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3706 ++n;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3707 }
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 if (n > 0) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3710 // we popped at least one entry from the local queue
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3711
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3712 statsOnly( ++_global_transfers_to; _local_pops += n );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3713
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3714 if (!_cm->mark_stack_push(buffer, n)) {
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
3715 if (_cm->verbose_low()) {
6862
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 6812
diff changeset
3716 gclog_or_tty->print_cr("[%u] 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
3717 _worker_id);
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
3718 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3719 set_has_aborted();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3720 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3721 // the transfer was successful
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3722
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
3723 if (_cm->verbose_medium()) {
6862
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 6812
diff changeset
3724 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
3725 _worker_id, n);
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
3726 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3727 statsOnly( int tmp_size = _cm->mark_stack_size();
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
3728 if (tmp_size > _global_max_size) {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3729 _global_max_size = tmp_size;
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
3730 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3731 _global_pushes += n );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3732 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3733 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3734
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3735 // this operation was quite expensive, so decrease the limits
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3736 decrease_limits();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3737 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3738
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3739 void CMTask::get_entries_from_global_stack() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3740 // 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
3741 // from the global stack.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3742 oop buffer[global_stack_transfer_size];
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3743 int n;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3744 _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
3745 assert(n <= global_stack_transfer_size,
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
3746 "we should not pop more than the given limit");
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3747 if (n > 0) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3748 // yes, we did actually pop at least one entry
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3749
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3750 statsOnly( ++_global_transfers_from; _global_pops += n );
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
3751 if (_cm->verbose_medium()) {
6862
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 6812
diff changeset
3752 gclog_or_tty->print_cr("[%u] 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
3753 _worker_id, n);
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
3754 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3755 for (int i = 0; i < n; ++i) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3756 bool success = _task_queue->push(buffer[i]);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3757 // 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
3758 // 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
3759 assert(success, "invariant");
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3760 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3761
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3762 statsOnly( int tmp_size = _task_queue->size();
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
3763 if (tmp_size > _local_max_size) {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3764 _local_max_size = tmp_size;
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
3765 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3766 _local_pushes += n );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3767 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3768
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3769 // this operation was quite expensive, so decrease the limits
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3770 decrease_limits();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3771 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3772
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3773 void CMTask::drain_local_queue(bool partially) {
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
3774 if (has_aborted()) return;
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3775
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3776 // 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
3777 // 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
3778 // of things to do) or totally (at the very end).
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3779 size_t target_size;
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
3780 if (partially) {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3781 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
3782 } else {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3783 target_size = 0;
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
3784 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3785
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3786 if (_task_queue->size() > target_size) {
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
3787 if (_cm->verbose_high()) {
17937
78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents: 17844
diff changeset
3788 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
3789 _worker_id, target_size);
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
3790 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3791
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3792 oop obj;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3793 bool ret = _task_queue->pop_local(obj);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3794 while (ret) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3795 statsOnly( ++_local_pops );
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_high()) {
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] popped "PTR_FORMAT, _worker_id,
17937
78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents: 17844
diff changeset
3799 p2i((void*) obj));
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
3800 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3801
1023
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
3802 assert(_g1h->is_in_g1_reserved((HeapWord*) obj), "invariant" );
2361
1216415d8e35 7014923: G1: code cleanup
tonyp
parents: 2177
diff changeset
3803 assert(!_g1h->is_on_master_free_list(
2152
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
3804 _g1h->heap_region_containing((HeapWord*) obj)), "invariant");
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3805
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3806 scan_object(obj);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3807
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
3808 if (_task_queue->size() <= target_size || has_aborted()) {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3809 ret = false;
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
3810 } else {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3811 ret = _task_queue->pop_local(obj);
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
3812 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3813 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3814
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
3815 if (_cm->verbose_high()) {
6862
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 6812
diff changeset
3816 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
3817 _worker_id, _task_queue->size());
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
3818 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3819 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3820 }
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 void CMTask::drain_global_stack(bool partially) {
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
3823 if (has_aborted()) return;
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3824
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3825 // 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
3826 // drain the global stack.
1023
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
3827 assert(partially || _task_queue->size() == 0, "invariant");
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3828
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3829 // 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
3830 // 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
3831 // 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
3832 // because we move entries from the global stack in chunks or
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3833 // 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
3834 // drop below the target. But, this is not a problem.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3835 size_t target_size;
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
3836 if (partially) {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3837 target_size = _cm->partial_mark_stack_size_target();
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
3838 } else {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3839 target_size = 0;
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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3842 if (_cm->mark_stack_size() > target_size) {
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
3843 if (_cm->verbose_low()) {
17937
78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents: 17844
diff changeset
3844 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
3845 _worker_id, target_size);
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
3846 }
342
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 while (!has_aborted() && _cm->mark_stack_size() > target_size) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3849 get_entries_from_global_stack();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3850 drain_local_queue(partially);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3851 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3852
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
3853 if (_cm->verbose_low()) {
17937
78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents: 17844
diff changeset
3854 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
3855 _worker_id, _cm->mark_stack_size());
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
3856 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3857 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3858 }
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 // 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
3861 // 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
3862 // replicated. We should really get rid of the single-threaded version
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3863 // of the code to simplify things.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3864 void CMTask::drain_satb_buffers() {
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
3865 if (has_aborted()) return;
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3866
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3867 // 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
3868 // 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
3869 // notices that SATB buffers are available for draining. It'd be
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3870 // very counter productive if it did that. :-)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3871 _draining_satb_buffers = true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3872
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3873 CMObjectClosure oc(this);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3874 SATBMarkQueueSet& satb_mq_set = JavaThread::satb_mark_queue_set();
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
3875 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
3876 satb_mq_set.set_par_closure(_worker_id, &oc);
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
3877 } else {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3878 satb_mq_set.set_closure(&oc);
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
3879 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3880
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3881 // This keeps claiming and applying the closure to completed buffers
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3882 // 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
3883 if (G1CollectedHeap::use_parallel_gc_threads()) {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3884 while (!has_aborted() &&
6862
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 6812
diff changeset
3885 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
3886 if (_cm->verbose_medium()) {
6862
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 6812
diff changeset
3887 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
3888 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3889 statsOnly( ++_satb_buffers_processed );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3890 regular_clock_call();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3891 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3892 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3893 while (!has_aborted() &&
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3894 satb_mq_set.apply_closure_to_completed_buffer()) {
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
3895 if (_cm->verbose_medium()) {
6862
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 6812
diff changeset
3896 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
3897 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3898 statsOnly( ++_satb_buffers_processed );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3899 regular_clock_call();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3900 }
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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3903 if (!concurrent() && !has_aborted()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3904 // We should only do this during remark.
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
3905 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
3906 satb_mq_set.par_iterate_closure_all_threads(_worker_id);
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
3907 } else {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3908 satb_mq_set.iterate_closure_all_threads();
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
3909 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3910 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3911
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3912 _draining_satb_buffers = false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3913
1023
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
3914 assert(has_aborted() ||
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
3915 concurrent() ||
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
3916 satb_mq_set.completed_buffers_num() == 0, "invariant");
342
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 (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
3919 satb_mq_set.set_par_closure(_worker_id, NULL);
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 satb_mq_set.set_closure(NULL);
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 // again, this was a potentially expensive operation, decrease the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3925 // limits to get the regular clock call early
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3926 decrease_limits();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3927 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3928
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3929 void CMTask::print_stats() {
6862
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 6812
diff changeset
3930 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
3931 _worker_id, _calls);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3932 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
3933 _elapsed_time_ms, _termination_time_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3934 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
3935 _step_times_ms.num(), _step_times_ms.avg(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3936 _step_times_ms.sd());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3937 gclog_or_tty->print_cr(" max = %1.2lfms, total = %1.2lfms",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3938 _step_times_ms.maximum(), _step_times_ms.sum());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3939
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3940 #if _MARKING_STATS_
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3941 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
3942 _all_clock_intervals_ms.num(), _all_clock_intervals_ms.avg(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3943 _all_clock_intervals_ms.sd());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3944 gclog_or_tty->print_cr(" max = %1.2lfms, total = %1.2lfms",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3945 _all_clock_intervals_ms.maximum(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3946 _all_clock_intervals_ms.sum());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3947 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
3948 _clock_due_to_scanning, _clock_due_to_marking);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3949 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
3950 _objs_scanned, _objs_found_on_bitmap);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3951 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
3952 _local_pushes, _local_pops, _local_max_size);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3953 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
3954 _global_pushes, _global_pops, _global_max_size);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3955 gclog_or_tty->print_cr(" transfers to = %d, transfers from = %d",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3956 _global_transfers_to,_global_transfers_from);
5988
2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents: 4837
diff changeset
3957 gclog_or_tty->print_cr(" Regions: claimed = %d", _regions_claimed);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3958 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
3959 gclog_or_tty->print_cr(" Steals: attempts = %d, successes = %d",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3960 _steal_attempts, _steals);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3961 gclog_or_tty->print_cr(" Aborted: %d, due to", _aborted);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3962 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
3963 _aborted_overflow, _aborted_cm_aborted, _aborted_yield);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3964 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
3965 _aborted_timed_out, _aborted_satb, _aborted_termination);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3966 #endif // _MARKING_STATS_
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
8787
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
3971 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
3972 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
3973 with other invocations of do_marking_step() on different tasks
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3974 (but only one per task, obviously) and concurrently with the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3975 mutator threads, or during remark, hence it eliminates the need
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3976 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
3977 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
3978 phase. Interestingly, tasks are also claimable during evacuation
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3979 pauses too, since do_marking_step() ensures that it aborts before
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3980 it needs to yield.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3981
8787
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
3982 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
3983 following:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3984
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3985 (1) Marking Bitmap. If there are gray objects that appear only
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3986 on the bitmap (this happens either when dealing with an overflow
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3987 or when the initial marking phase has simply marked the roots
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3988 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
3989 regions whose bitmap they then scan to find gray objects. A
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3990 global finger indicates where the end of the last claimed region
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3991 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
3992 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
3993 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
3994 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
3995 pushed on a stack).
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3996
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3997 (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
3998 reasonably efficiently by the task. Other tasks can steal from
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3999 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
4000 task attempts to keep its local queue short but not totally
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4001 empty, so that entries are available for stealing by other
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4002 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
4003 drain its local queue.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4004
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4005 (3) Global Mark Stack. This handles local queue overflow. During
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4006 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
4007 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
4008 interaction with it which might cause contention. If it
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4009 overflows, then the marking phase should restart and iterate
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4010 over the bitmap to identify gray objects. Throughout the marking
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4011 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
4012 length but not totally empty, so that entries are available for
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4013 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
4014 will totally drain the global mark stack.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4015
5988
2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents: 4837
diff changeset
4016 (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
4017 made available. Buffers are regularly removed from this queue
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4018 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
4019 long. During remark, all completed buffers are processed, as
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4020 well as the filled in parts of any uncompleted buffers.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4021
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4022 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
4023 has been reached. There are a few other cases when the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4024 do_marking_step() method also aborts:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4025
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4026 (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
4027
5988
2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents: 4837
diff changeset
4028 (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
4029 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
4030 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
4031 (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
4032 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
4033 immediately restart.
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4034
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4035 (3) When enough completed SATB buffers are available. The
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4036 do_marking_step() method only tries to drain SATB buffers right
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4037 at the beginning. So, if enough buffers are available, the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4038 marking step aborts and the SATB buffers are processed at
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4039 the beginning of the next invocation.
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 (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
4042 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
4043 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
4044 happens then objects will be compacted underneath our feet, the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4045 heap might shrink, etc. We save checking for this by just
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4046 aborting and doing the yield right at the end.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4047
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4048 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
4049 be called in a loop (or, otherwise, regularly) until it completes.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4050
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4051 If a marking step completes without its has_aborted() flag being
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4052 true, it means it has completed the current marking phase (and
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4053 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
4054
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4055 A method called regular_clock_call() is invoked "regularly" (in
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4056 sub ms intervals) throughout marking. It is this clock method that
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4057 checks all the abort conditions which were mentioned above and
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4058 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
4059 trigger this clock method: when the number of object words the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4060 marking phase has scanned or the number of references the marking
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4061 phase has visited reach a given limit. Additional invocations to
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4062 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
4063 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
4064 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
4065 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
4066 too and not constantly check them throughout the code.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4067
8787
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
4068 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
4069 termination protocol.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
4070
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
4071 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
4072 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
4073 skip any synchronization in the termination and overflow code.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
4074 Examples include the serial remark code and the serial reference
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
4075 processing closures.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
4076
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
4077 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
4078 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
4079 Examples include the concurrent marking code (CMMarkingTask),
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
4080 the MT remark code, and the MT reference processing closures.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
4081
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4082 *****************************************************************************/
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4083
2174
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
4084 void CMTask::do_marking_step(double time_target_ms,
8787
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
4085 bool do_termination,
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
4086 bool is_serial) {
1023
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
4087 assert(time_target_ms >= 1.0, "minimum granularity is 1ms");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
4088 assert(concurrent() == _cm->concurrent(), "they should be the same");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
4089
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4090 G1CollectorPolicy* g1_policy = _g1h->g1_policy();
1023
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
4091 assert(_task_queues != NULL, "invariant");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
4092 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
4093 assert(_task_queues->queue(_worker_id) == _task_queue, "invariant");
1023
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
4094
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
4095 assert(!_claimed,
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
4096 "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
4097
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4098 // 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
4099 // 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
4100 // 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
4101 // catch most problems.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4102 _claimed = true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4103
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4104 _start_time_ms = os::elapsedVTime() * 1000.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4105 statsOnly( _interval_start_time_ms = _start_time_ms );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4106
8787
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
4107 // 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
4108 // 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
4109 // enable stealing when the termination protocol is enabled
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
4110 // and do_marking_step() is not being called serially.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
4111 bool do_stealing = do_termination && !is_serial;
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
4112
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4113 double diff_prediction_ms =
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4114 g1_policy->get_new_prediction(&_marking_step_diffs_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4115 _time_target_ms = time_target_ms - diff_prediction_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4116
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4117 // 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
4118 // call the regular clock method
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4119 _words_scanned = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4120 _refs_reached = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4121 recalculate_limits();
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 // clear all flags
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4124 clear_has_aborted();
2174
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
4125 _has_timed_out = false;
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4126 _draining_satb_buffers = false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4127
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4128 ++_calls;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4129
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
4130 if (_cm->verbose_low()) {
6862
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 6812
diff changeset
4131 gclog_or_tty->print_cr("[%u] >>>>>>>>>> START, call = %d, "
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4132 "target = %1.2lfms >>>>>>>>>>",
6862
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 6812
diff changeset
4133 _worker_id, _calls, _time_target_ms);
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
4134 }
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 // 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
4137 // 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
4138 // statically.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4139 CMBitMapClosure bitmap_closure(this, _cm, _nextMarkBitMap);
3771
842b840e67db 7046558: G1: concurrent marking optimizations
tonyp
parents: 3378
diff changeset
4140 G1CMOopClosure cm_oop_closure(_g1h, _cm, this);
842b840e67db 7046558: G1: concurrent marking optimizations
tonyp
parents: 3378
diff changeset
4141 set_cm_oop_closure(&cm_oop_closure);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4142
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4143 if (_cm->has_overflown()) {
5988
2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents: 4837
diff changeset
4144 // 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
4145 // 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
4146 // 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
4147 // right at the end of this task.
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4148 set_has_aborted();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4149 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4150
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4151 // First drain any available SATB buffers. After this, we will not
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4152 // look at SATB buffers before the next invocation of this method.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4153 // If enough completed SATB buffers are queued up, the regular clock
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4154 // will abort this task so that it restarts.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4155 drain_satb_buffers();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4156 // ...then partially drain the local queue and the global stack
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4157 drain_local_queue(true);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4158 drain_global_stack(true);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4159
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4160 do {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4161 if (!has_aborted() && _curr_region != NULL) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4162 // 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
4163 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
4164 "should not be NULL either");
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4165
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4166 // We might have restarted this task after an evacuation pause
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4167 // which might have evacuated the region we're holding on to
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4168 // 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
4169 // 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
4170 // contains garbage (update_region_limit() will also move
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4171 // _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
4172 update_region_limit();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4173 // 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
4174 // as we might be restarting this task after aborting half-way
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4175 // through scanning this region. In this case, _finger points to
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4176 // 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
4177 // fresh region, _finger points to start().
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4178 MemRegion mr = MemRegion(_finger, _region_limit);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4179
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
4180 if (_cm->verbose_low()) {
6862
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 6812
diff changeset
4181 gclog_or_tty->print_cr("[%u] we're scanning part "
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4182 "["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
4183 "of region "HR_FORMAT,
17937
78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents: 17844
diff changeset
4184 _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
4185 HR_FORMAT_PARAMS(_curr_region));
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
4186 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4187
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
4188 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
4189 "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
4190
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
4191 // 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
4192 // 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
4193 // 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
4194 // 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
4195 // 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
4196 // 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
4197 // that is left.
8034
bce1ac447f6b 7052429: G1: Avoid unnecessary scanning of humongous regions during concurrent marking
johnc
parents: 8014
diff changeset
4198 // 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
4199 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
4200 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
4201 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
4202 } 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
4203 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
4204 // 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
4205 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
4206 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
4207 }
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
4208 // 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
4209 // 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
4210 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
4211 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
4212 } else if (_nextMarkBitMap->iterate(&bitmap_closure, mr)) {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4213 giveup_current_region();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4214 regular_clock_call();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4215 } else {
1023
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
4216 assert(has_aborted(), "currently the only way to do so");
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4217 // The only way to abort the bitmap iteration is to return
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4218 // false from the do_bit() method. However, inside the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4219 // do_bit() method we move the _finger to point to the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4220 // object currently being looked at. So, if we bail out, we
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4221 // have definitely set _finger to something non-null.
1023
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
4222 assert(_finger != NULL, "invariant");
342
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 // Region iteration was actually aborted. So now _finger
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4225 // 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
4226 // leave it there, when we restart this task, we will rescan
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4227 // 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
4228 // enough to point to the next possible object header (the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4229 // 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
4230 // granularity).
1314
3f0549ed0c98 6921710: G1: assert(new_finger >= _finger && new_finger < _region_limit,"invariant")
apetrusenko
parents: 1284
diff changeset
4231 assert(_finger < _region_limit, "invariant");
8733
9def4075da6d 8008079: G1: Add nextObject routine to CMBitMapRO and replace nextWord
tamao
parents: 8039
diff changeset
4232 HeapWord* new_finger = _nextMarkBitMap->nextObject(_finger);
1314
3f0549ed0c98 6921710: G1: assert(new_finger >= _finger && new_finger < _region_limit,"invariant")
apetrusenko
parents: 1284
diff changeset
4233 // 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
4234 if (new_finger >= _region_limit) {
5988
2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents: 4837
diff changeset
4235 giveup_current_region();
1314
3f0549ed0c98 6921710: G1: assert(new_finger >= _finger && new_finger < _region_limit,"invariant")
apetrusenko
parents: 1284
diff changeset
4236 } else {
5988
2a0172480595 7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents: 4837
diff changeset
4237 move_finger_to(new_finger);
1314
3f0549ed0c98 6921710: G1: assert(new_finger >= _finger && new_finger < _region_limit,"invariant")
apetrusenko
parents: 1284
diff changeset
4238 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4239 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4240 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4241 // At this point we have either completed iterating over the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4242 // region we were holding on to, or we have aborted.
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 // We then partially drain the local queue and the global stack.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4245 // (Do we really need this?)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4246 drain_local_queue(true);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4247 drain_global_stack(true);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4248
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4249 // 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
4250 // return NULL with potentially more regions available for
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4251 // 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
4252 // whether we're done or not.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4253 while (!has_aborted() && _curr_region == NULL && !_cm->out_of_regions()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4254 // 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
4255 // given up on the previous one.
1023
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
4256 // Separated the asserts so that we know which one fires.
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
4257 assert(_curr_region == NULL, "invariant");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
4258 assert(_finger == NULL, "invariant");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
4259 assert(_region_limit == NULL, "invariant");
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
4260 if (_cm->verbose_low()) {
6862
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 6812
diff changeset
4261 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
4262 }
6862
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 6812
diff changeset
4263 HeapRegion* claimed_region = _cm->claim_region(_worker_id);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4264 if (claimed_region != NULL) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4265 // Yes, we managed to claim one
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4266 statsOnly( ++_regions_claimed );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4267
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
4268 if (_cm->verbose_low()) {
6862
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 6812
diff changeset
4269 gclog_or_tty->print_cr("[%u] we successfully claimed "
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4270 "region "PTR_FORMAT,
17937
78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents: 17844
diff changeset
4271 _worker_id, p2i(claimed_region));
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
4272 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4273
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4274 setup_for_region(claimed_region);
1023
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
4275 assert(_curr_region == claimed_region, "invariant");
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4276 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4277 // 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
4278 // 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
4279 // 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
4280 // method once round the loop to make sure it's called
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4281 // frequently enough.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4282 regular_clock_call();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4283 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4284
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4285 if (!has_aborted() && _curr_region == NULL) {
1023
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
4286 assert(_cm->out_of_regions(),
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
4287 "at this point we should be out of regions");
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4288 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4289 } while ( _curr_region != NULL && !has_aborted());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4290
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4291 if (!has_aborted()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4292 // 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
4293 // tasks might be pushing objects to it concurrently.
1023
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
4294 assert(_cm->out_of_regions(),
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
4295 "at this point we should be out of regions");
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4296
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
4297 if (_cm->verbose_low()) {
6862
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 6812
diff changeset
4298 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
4299 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4300
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4301 // Try to reduce the number of available SATB buffers so that
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4302 // remark has less work to do.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4303 drain_satb_buffers();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4304 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4305
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4306 // 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
4307 // local queue and global stack.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4308 drain_local_queue(false);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4309 drain_global_stack(false);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4310
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4311 // Attempt at work stealing from other task's queues.
2174
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
4312 if (do_stealing && !has_aborted()) {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4313 // 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
4314 // we could. Let's try to do some stealing...
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4315
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4316 // 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
4317 // tasks might be pushing objects to it concurrently.
1023
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
4318 assert(_cm->out_of_regions() && _task_queue->size() == 0,
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
4319 "only way to reach here");
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4320
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
4321 if (_cm->verbose_low()) {
6862
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 6812
diff changeset
4322 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
4323 }
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 while (!has_aborted()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4326 oop obj;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4327 statsOnly( ++_steal_attempts );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4328
6862
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 6812
diff changeset
4329 if (_cm->try_stealing(_worker_id, &_hash_seed, obj)) {
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
4330 if (_cm->verbose_medium()) {
6862
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 6812
diff changeset
4331 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
4332 _worker_id, p2i((void*) obj));
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
4333 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4334
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4335 statsOnly( ++_steals );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4336
1023
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
4337 assert(_nextMarkBitMap->isMarked((HeapWord*) obj),
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
4338 "any stolen object should be marked");
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4339 scan_object(obj);
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 // 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
4342 // local queue and global stack.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4343 drain_local_queue(false);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4344 drain_global_stack(false);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4345 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4346 break;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4347 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4348 }
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
3316
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents: 2436
diff changeset
4351 // 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
4352 // 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
4353 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
4354 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
4355 _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
4356 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
4357 }
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents: 2436
diff changeset
4358 }
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents: 2436
diff changeset
4359
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4360 // 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
4361 // termination protocol.
2174
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
4362 if (do_termination && !has_aborted()) {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4363 // 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
4364 // tasks might be concurrently pushing objects on it.
1023
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
4365 // Separated the asserts so that we know which one fires.
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
4366 assert(_cm->out_of_regions(), "only way to reach here");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
4367 assert(_task_queue->size() == 0, "only way to reach here");
342
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] starting termination protocol", _worker_id);
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
4371 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4372
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4373 _termination_start_time_ms = os::elapsedVTime() * 1000.0;
8787
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
4374
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4375 // The CMTask class also extends the TerminatorTerminator class,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4376 // hence its should_exit_termination() method will also decide
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4377 // whether to exit the termination protocol or not.
8787
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
4378 bool finished = (is_serial ||
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
4379 _cm->terminator()->offer_termination(this));
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4380 double termination_end_time_ms = os::elapsedVTime() * 1000.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4381 _termination_time_ms +=
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4382 termination_end_time_ms - _termination_start_time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4383
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4384 if (finished) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4385 // We're all done.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4386
6862
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 6812
diff changeset
4387 if (_worker_id == 0) {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4388 // let's allow task 0 to do this
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4389 if (concurrent()) {
1023
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
4390 assert(_cm->concurrent_marking_in_progress(), "invariant");
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4391 // we need to set this to false before the next
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4392 // safepoint. This way we ensure that the marking phase
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4393 // doesn't observe any more heap expansions.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4394 _cm->clear_concurrent_marking_in_progress();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4395 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4396 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4397
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4398 // 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
4399 // all other tasks have finished. We separated the guarantees so
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
4400 // 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
4401 // which one.
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
4402 guarantee(_cm->out_of_regions(), "only way to reach here");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
4403 guarantee(_cm->mark_stack_empty(), "only way to reach here");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
4404 guarantee(_task_queue->size() == 0, "only way to reach here");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
4405 guarantee(!_cm->has_overflown(), "only way to reach here");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
4406 guarantee(!_cm->mark_stack_overflow(), "only way to reach here");
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4407
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
4408 if (_cm->verbose_low()) {
6862
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 6812
diff changeset
4409 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
4410 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4411 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4412 // 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
4413 // 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
4414
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
4415 if (_cm->verbose_low()) {
6862
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 6812
diff changeset
4416 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
4417 _worker_id);
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
4418 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4419
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4420 set_has_aborted();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4421 statsOnly( ++_aborted_termination );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4422 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4423 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4424
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4425 // 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
4426 // closure which was statically allocated in this frame doesn't
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4427 // escape it by accident.
3771
842b840e67db 7046558: G1: concurrent marking optimizations
tonyp
parents: 3378
diff changeset
4428 set_cm_oop_closure(NULL);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4429 double end_time_ms = os::elapsedVTime() * 1000.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4430 double elapsed_time_ms = end_time_ms - _start_time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4431 // Update the step history.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4432 _step_times_ms.add(elapsed_time_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4433
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4434 if (has_aborted()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4435 // The task was aborted for some reason.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4436
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4437 statsOnly( ++_aborted );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4438
2174
234761c55641 6608385: G1: need to support parallel reference processing
johnc
parents: 2152
diff changeset
4439 if (_has_timed_out) {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4440 double diff_ms = elapsed_time_ms - _time_target_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4441 // Keep statistics of how well we did with respect to hitting
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4442 // 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
4443 // other reasons, then the results might get skewed).
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4444 _marking_step_diffs_ms.add(diff_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4445 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4446
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4447 if (_cm->has_overflown()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4448 // This is the interesting one. We aborted because a global
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4449 // overflow was raised. This means we have to restart the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4450 // marking phase and start iterating over regions. However, in
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4451 // 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
4452 // 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
4453 // will achieve this with the use of two barrier sync points.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4454
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
4455 if (_cm->verbose_low()) {
6862
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 6812
diff changeset
4456 gclog_or_tty->print_cr("[%u] detected overflow", _worker_id);
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
4457 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4458
8787
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
4459 if (!is_serial) {
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
4460 // 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
4461 // from a parallel context
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
4462 _cm->enter_first_sync_barrier(_worker_id);
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
4463
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
4464 // 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
4465 // stopped doing marking work. So, it's now safe to
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
4466 // 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
4467 // task 0 will clear the global data structures.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
4468 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4469
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4470 statsOnly( ++_aborted_overflow );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4471
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4472 // We clear the local state of this task...
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4473 clear_region_fields();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4474
8787
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
4475 if (!is_serial) {
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
4476 // ...and enter the second barrier.
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
4477 _cm->enter_second_sync_barrier(_worker_id);
fa08949fe0cb 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 8744
diff changeset
4478 }
8788
e864cc14ca75 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents: 8787
diff changeset
4479 // 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
4480 // marking, everything has been re-initialized and we're
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4481 // ready to restart.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4482 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4483
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4484 if (_cm->verbose_low()) {
6862
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 6812
diff changeset
4485 gclog_or_tty->print_cr("[%u] <<<<<<<<<< ABORTING, target = %1.2lfms, "
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4486 "elapsed = %1.2lfms <<<<<<<<<<",
6862
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 6812
diff changeset
4487 _worker_id, _time_target_ms, elapsed_time_ms);
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
4488 if (_cm->has_aborted()) {
6862
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 6812
diff changeset
4489 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
4490 _worker_id);
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
4491 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4492 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4493 } else {
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
4494 if (_cm->verbose_low()) {
6862
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 6812
diff changeset
4495 gclog_or_tty->print_cr("[%u] <<<<<<<<<< FINISHED, target = %1.2lfms, "
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4496 "elapsed = %1.2lfms <<<<<<<<<<",
6862
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 6812
diff changeset
4497 _worker_id, _time_target_ms, elapsed_time_ms);
3776
23d434c6290d 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 3772
diff changeset
4498 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4499 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4500
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4501 _claimed = false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4502 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4503
6862
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 6812
diff changeset
4504 CMTask::CMTask(uint worker_id,
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4505 ConcurrentMark* cm,
4836
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
4506 size_t* marked_bytes,
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
4507 BitMap* card_bm,
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4508 CMTaskQueue* task_queue,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4509 CMTaskQueueSet* task_queues)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4510 : _g1h(G1CollectedHeap::heap()),
6862
8a5ea0a9ccc4 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 6812
diff changeset
4511 _worker_id(worker_id), _cm(cm),
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4512 _claimed(false),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4513 _nextMarkBitMap(NULL), _hash_seed(17),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4514 _task_queue(task_queue),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4515 _task_queues(task_queues),
3771
842b840e67db 7046558: G1: concurrent marking optimizations
tonyp
parents: 3378
diff changeset
4516 _cm_oop_closure(NULL),
4836
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
4517 _marked_bytes_array(marked_bytes),
d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 4830
diff changeset
4518 _card_bm(card_bm) {
1023
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
4519 guarantee(task_queue != NULL, "invariant");
11d4857fe5e1 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 1022
diff changeset
4520 guarantee(task_queues != NULL, "invariant");
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4521
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4522 statsOnly( _clock_due_to_scanning = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4523 _clock_due_to_marking = 0 );
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 _marking_step_diffs_ms.add(0.5);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
4526 }
2435
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 2369
diff changeset
4527
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 2369
diff changeset
4528 // 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
4529 // 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
4530 // 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
4531 // 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
4532 // 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
4533 // 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
4534
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 2369
diff changeset
4535 // 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
4536 // 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
4537 #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
4538
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 2369
diff changeset
4539 #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
4540 #ifdef _LP64
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 2369
diff changeset
4541 #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
4542 #else // _LP64
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 2369
diff changeset
4543 #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
4544 #endif // _LP64
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 2369
diff changeset
4545
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 2369
diff changeset
4546 // 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
4547 #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
4548 #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
4549 #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
4550 #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
4551 #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
4552 #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
4553
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 2369
diff changeset
4554 // 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
4555 #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
4556 #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
4557 #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
4558 #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
4559
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 2369
diff changeset
4560 G1PrintRegionLivenessInfoClosure::
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 2369
diff changeset
4561 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
4562 : _out(out),
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 2369
diff changeset
4563 _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
4564 _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
4565 _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
4566 _hum_prev_live_bytes(0), _hum_next_live_bytes(0),
12080
5888334c9c24 7145569: G1: optimize nmethods scanning
johnc
parents: 10405
diff changeset
4567 _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
4568 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
4569 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
4570 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
4571 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
4572
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 2369
diff changeset
4573 // 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
4574 _out->cr();
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 2369
diff changeset
4575 _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
4576 _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
4577 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
4578 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
4579 G1PPRL_SUM_BYTE_FORMAT("region-size"),
17937
78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents: 17844
diff changeset
4580 p2i(g1_committed.start()), p2i(g1_committed.end()),
78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents: 17844
diff changeset
4581 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
4582 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
4583 _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
4584 _out->print_cr(G1PPRL_LINE_PREFIX
10290
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo
tschatzl
parents: 10186
diff changeset
4585 G1PPRL_TYPE_H_FORMAT
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo
tschatzl
parents: 10186
diff changeset
4586 G1PPRL_ADDR_BASE_H_FORMAT
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo
tschatzl
parents: 10186
diff changeset
4587 G1PPRL_BYTE_H_FORMAT
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo
tschatzl
parents: 10186
diff changeset
4588 G1PPRL_BYTE_H_FORMAT
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo
tschatzl
parents: 10186
diff changeset
4589 G1PPRL_BYTE_H_FORMAT
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo
tschatzl
parents: 10186
diff changeset
4590 G1PPRL_DOUBLE_H_FORMAT
12080
5888334c9c24 7145569: G1: optimize nmethods scanning
johnc
parents: 10405
diff changeset
4591 G1PPRL_BYTE_H_FORMAT
10290
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo
tschatzl
parents: 10186
diff changeset
4592 G1PPRL_BYTE_H_FORMAT,
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo
tschatzl
parents: 10186
diff changeset
4593 "type", "address-range",
12080
5888334c9c24 7145569: G1: optimize nmethods scanning
johnc
parents: 10405
diff changeset
4594 "used", "prev-live", "next-live", "gc-eff",
5888334c9c24 7145569: G1: optimize nmethods scanning
johnc
parents: 10405
diff changeset
4595 "remset", "code-roots");
3977
5cc33133bc6d 7092245: G1: Wrong format specifier in G1PrintRegionLivenessInfo header output
johnc
parents: 3975
diff changeset
4596 _out->print_cr(G1PPRL_LINE_PREFIX
10290
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo
tschatzl
parents: 10186
diff changeset
4597 G1PPRL_TYPE_H_FORMAT
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo
tschatzl
parents: 10186
diff changeset
4598 G1PPRL_ADDR_BASE_H_FORMAT
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo
tschatzl
parents: 10186
diff changeset
4599 G1PPRL_BYTE_H_FORMAT
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo
tschatzl
parents: 10186
diff changeset
4600 G1PPRL_BYTE_H_FORMAT
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo
tschatzl
parents: 10186
diff changeset
4601 G1PPRL_BYTE_H_FORMAT
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo
tschatzl
parents: 10186
diff changeset
4602 G1PPRL_DOUBLE_H_FORMAT
12080
5888334c9c24 7145569: G1: optimize nmethods scanning
johnc
parents: 10405
diff changeset
4603 G1PPRL_BYTE_H_FORMAT
10290
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo
tschatzl
parents: 10186
diff changeset
4604 G1PPRL_BYTE_H_FORMAT,
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo
tschatzl
parents: 10186
diff changeset
4605 "", "",
12080
5888334c9c24 7145569: G1: optimize nmethods scanning
johnc
parents: 10405
diff changeset
4606 "(bytes)", "(bytes)", "(bytes)", "(bytes/ms)",
5888334c9c24 7145569: G1: optimize nmethods scanning
johnc
parents: 10405
diff changeset
4607 "(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
4608 }
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 2369
diff changeset
4609
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 2369
diff changeset
4610 // 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
4611 // 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
4612 // 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
4613 // 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
4614 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
4615 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
4616 // 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
4617 // 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
4618 if (*hum_bytes > 0) {
3986
65a8ff39a6da 7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
johnc
parents: 3979
diff changeset
4619 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
4620 *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
4621 }
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 2369
diff changeset
4622 return bytes;
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 2369
diff changeset
4623 }
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 2369
diff changeset
4624
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 2369
diff changeset
4625 // 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
4626 // 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
4627 // 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
4628 // 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
4629 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
4630 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
4631 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
4632 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
4633 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
4634 *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
4635 *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
4636 *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
4637 *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
4638 }
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 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
4641 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
4642 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
4643 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
4644 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
4645 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
4646 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
4647 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
4648 double gc_eff = r->gc_efficiency();
10290
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo
tschatzl
parents: 10186
diff changeset
4649 size_t remset_bytes = r->rem_set()->mem_size();
12080
5888334c9c24 7145569: G1: optimize nmethods scanning
johnc
parents: 10405
diff changeset
4650 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
4651
2435
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 2369
diff changeset
4652 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
4653 type = "FREE";
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 2369
diff changeset
4654 } 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
4655 type = "SURV";
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 2369
diff changeset
4656 } 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
4657 type = "EDEN";
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 2369
diff changeset
4658 } 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
4659 type = "HUMS";
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 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
4662 _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
4663 "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
4664 // 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
4665 _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
4666 _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
4667 _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
4668 _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
4669 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
4670 &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
4671 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
4672 } 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
4673 type = "HUMC";
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 2369
diff changeset
4674 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
4675 &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
4676 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
4677 } else {
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 2369
diff changeset
4678 type = "OLD";
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 2369
diff changeset
4679 }
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 2369
diff changeset
4680
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 2369
diff changeset
4681 _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
4682 _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
4683 _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
4684 _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
4685 _total_remset_bytes += remset_bytes;
12080
5888334c9c24 7145569: G1: optimize nmethods scanning
johnc
parents: 10405
diff changeset
4686 _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
4687
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 2369
diff changeset
4688 // 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
4689 _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
4690 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
4691 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
4692 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
4693 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
4694 G1PPRL_BYTE_FORMAT
10290
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo
tschatzl
parents: 10186
diff changeset
4695 G1PPRL_DOUBLE_FORMAT
12080
5888334c9c24 7145569: G1: optimize nmethods scanning
johnc
parents: 10405
diff changeset
4696 G1PPRL_BYTE_FORMAT
10290
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo
tschatzl
parents: 10186
diff changeset
4697 G1PPRL_BYTE_FORMAT,
17937
78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents: 17844
diff changeset
4698 type, p2i(bottom), p2i(end),
12080
5888334c9c24 7145569: G1: optimize nmethods scanning
johnc
parents: 10405
diff changeset
4699 used_bytes, prev_live_bytes, next_live_bytes, gc_eff,
5888334c9c24 7145569: G1: optimize nmethods scanning
johnc
parents: 10405
diff changeset
4700 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
4701
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 2369
diff changeset
4702 return false;
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 2369
diff changeset
4703 }
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 2369
diff changeset
4704
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 2369
diff changeset
4705 G1PrintRegionLivenessInfoClosure::~G1PrintRegionLivenessInfoClosure() {
10290
05a17f270c7e 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo
tschatzl
parents: 10186
diff changeset
4706 // 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
4707 _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
4708 // 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
4709 _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
4710 _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
4711 " SUMMARY"
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 2369
diff changeset
4712 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
4713 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
4714 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
4715 G1PPRL_SUM_MB_PERC_FORMAT("next-live")
12080
5888334c9c24 7145569: G1: optimize nmethods scanning
johnc
parents: 10405
diff changeset
4716 G1PPRL_SUM_MB_FORMAT("remset")
5888334c9c24 7145569: G1: optimize nmethods scanning
johnc
parents: 10405
diff changeset
4717 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
4718 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
4719 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
4720 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
4721 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
4722 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
4723 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
4724 perc(_total_next_live_bytes, _total_capacity_bytes),
12080
5888334c9c24 7145569: G1: optimize nmethods scanning
johnc
parents: 10405
diff changeset
4725 bytes_to_mb(_total_remset_bytes),
5888334c9c24 7145569: G1: optimize nmethods scanning
johnc
parents: 10405
diff changeset
4726 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
4727 _out->cr();
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 2369
diff changeset
4728 }