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annotate src/share/vm/gc_implementation/g1/g1RemSetSummary.cpp @ 10372:e72f7eecc96d

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8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen Summary: Fixed the output of G1SummarizeRSetStats: too small datatype for the number of concurrently processed cards, added concurrent remembered set thread time retrieval for Linux and Windows (BSD uses os::elapsedTime() now), and other cleanup. The information presented during VM operation is now relative to the previous output, not always cumulative if G1SummarizeRSetStatsPeriod > 0. At VM exit, the code prints a cumulative summary. Reviewed-by: johnc, jwilhelm
author tschatzl
date Tue, 28 May 2013 09:32:06 +0200
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children 5888334c9c24
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10372
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1 /*
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2 * Copyright (c) 2013, 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 "gc_implementation/g1/concurrentG1Refine.hpp"
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27 #include "gc_implementation/g1/concurrentG1RefineThread.hpp"
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28 #include "gc_implementation/g1/heapRegion.hpp"
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29 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
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30 #include "gc_implementation/g1/g1RemSet.inline.hpp"
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31 #include "gc_implementation/g1/g1RemSetSummary.hpp"
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32 #include "gc_implementation/g1/heapRegionRemSet.hpp"
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33 #include "runtime/thread.inline.hpp"
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34
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35 class GetRSThreadVTimeClosure : public ThreadClosure {
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36 private:
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37 G1RemSetSummary* _summary;
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38 uint _counter;
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39
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40 public:
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41 GetRSThreadVTimeClosure(G1RemSetSummary * summary) : ThreadClosure(), _summary(summary), _counter(0) {
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42 assert(_summary != NULL, "just checking");
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43 }
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44
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45 virtual void do_thread(Thread* t) {
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46 ConcurrentG1RefineThread* crt = (ConcurrentG1RefineThread*) t;
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47 _summary->set_rs_thread_vtime(_counter, crt->vtime_accum());
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48 _counter++;
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49 }
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50 };
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51
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52 void G1RemSetSummary::update() {
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53 _num_refined_cards = remset()->conc_refine_cards();
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54 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set();
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55 _num_processed_buf_mutator = dcqs.processed_buffers_mut();
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56 _num_processed_buf_rs_threads = dcqs.processed_buffers_rs_thread();
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57
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58 _num_coarsenings = HeapRegionRemSet::n_coarsenings();
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59
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60 ConcurrentG1Refine * cg1r = G1CollectedHeap::heap()->concurrent_g1_refine();
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61 if (_rs_threads_vtimes != NULL) {
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62 GetRSThreadVTimeClosure p(this);
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63 cg1r->worker_threads_do(&p);
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64 }
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65 set_sampling_thread_vtime(cg1r->sampling_thread()->vtime_accum());
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66 }
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67
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68 void G1RemSetSummary::set_rs_thread_vtime(uint thread, double value) {
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69 assert(_rs_threads_vtimes != NULL, "just checking");
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70 assert(thread < _num_vtimes, "just checking");
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71 _rs_threads_vtimes[thread] = value;
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72 }
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73
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74 double G1RemSetSummary::rs_thread_vtime(uint thread) const {
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75 assert(_rs_threads_vtimes != NULL, "just checking");
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76 assert(thread < _num_vtimes, "just checking");
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77 return _rs_threads_vtimes[thread];
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78 }
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79
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80 void G1RemSetSummary::initialize(G1RemSet* remset, uint num_workers) {
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81 assert(_rs_threads_vtimes == NULL, "just checking");
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82 assert(remset != NULL, "just checking");
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83
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84 _remset = remset;
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85 _num_vtimes = num_workers;
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86 _rs_threads_vtimes = NEW_C_HEAP_ARRAY(double, _num_vtimes, mtGC);
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87 memset(_rs_threads_vtimes, 0, sizeof(double) * _num_vtimes);
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88
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89 update();
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90 }
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91
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92 void G1RemSetSummary::set(G1RemSetSummary* other) {
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93 assert(other != NULL, "just checking");
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94 assert(remset() == other->remset(), "just checking");
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95 assert(_num_vtimes == other->_num_vtimes, "just checking");
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96
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97 _num_refined_cards = other->num_concurrent_refined_cards();
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98
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99 _num_processed_buf_mutator = other->num_processed_buf_mutator();
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100 _num_processed_buf_rs_threads = other->num_processed_buf_rs_threads();
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101
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102 _num_coarsenings = other->_num_coarsenings;
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103
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104 memcpy(_rs_threads_vtimes, other->_rs_threads_vtimes, sizeof(double) * _num_vtimes);
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105
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106 set_sampling_thread_vtime(other->sampling_thread_vtime());
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107 }
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108
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109 void G1RemSetSummary::subtract_from(G1RemSetSummary* other) {
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110 assert(other != NULL, "just checking");
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111 assert(remset() == other->remset(), "just checking");
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112 assert(_num_vtimes == other->_num_vtimes, "just checking");
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113
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114 _num_refined_cards = other->num_concurrent_refined_cards() - _num_refined_cards;
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115
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116 _num_processed_buf_mutator = other->num_processed_buf_mutator() - _num_processed_buf_mutator;
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117 _num_processed_buf_rs_threads = other->num_processed_buf_rs_threads() - _num_processed_buf_rs_threads;
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118
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119 _num_coarsenings = other->num_coarsenings() - _num_coarsenings;
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120
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121 for (uint i = 0; i < _num_vtimes; i++) {
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122 set_rs_thread_vtime(i, other->rs_thread_vtime(i) - rs_thread_vtime(i));
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123 }
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124
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125 _sampling_thread_vtime = other->sampling_thread_vtime() - _sampling_thread_vtime;
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126 }
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127
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128 class HRRSStatsIter: public HeapRegionClosure {
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129 size_t _occupied;
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130 size_t _total_mem_sz;
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131 size_t _max_mem_sz;
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132 HeapRegion* _max_mem_sz_region;
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133 public:
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134 HRRSStatsIter() :
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135 _occupied(0),
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136 _total_mem_sz(0),
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137 _max_mem_sz(0),
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138 _max_mem_sz_region(NULL)
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139 {}
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140
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141 bool doHeapRegion(HeapRegion* r) {
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142 size_t mem_sz = r->rem_set()->mem_size();
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143 if (mem_sz > _max_mem_sz) {
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144 _max_mem_sz = mem_sz;
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145 _max_mem_sz_region = r;
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146 }
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147 _total_mem_sz += mem_sz;
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148 size_t occ = r->rem_set()->occupied();
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149 _occupied += occ;
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150 return false;
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151 }
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152 size_t total_mem_sz() { return _total_mem_sz; }
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153 size_t max_mem_sz() { return _max_mem_sz; }
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154 size_t occupied() { return _occupied; }
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155 HeapRegion* max_mem_sz_region() { return _max_mem_sz_region; }
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156 };
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157
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158 double calc_percentage(size_t numerator, size_t denominator) {
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159 if (denominator != 0) {
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160 return (double)numerator / denominator * 100.0;
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161 } else {
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162 return 0.0f;
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163 }
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164 }
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165
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166 void G1RemSetSummary::print_on(outputStream* out) {
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167 out->print_cr("\n Concurrent RS processed "SIZE_FORMAT" cards",
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168 num_concurrent_refined_cards());
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169 out->print_cr(" Of %d completed buffers:", num_processed_buf_total());
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170 out->print_cr(" %8d (%5.1f%%) by concurrent RS threads.",
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171 num_processed_buf_total(),
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172 calc_percentage(num_processed_buf_rs_threads(), num_processed_buf_total()));
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173 out->print_cr(" %8d (%5.1f%%) by mutator threads.",
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174 num_processed_buf_mutator(),
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175 calc_percentage(num_processed_buf_mutator(), num_processed_buf_total()));
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176 out->print_cr(" Concurrent RS threads times (s)");
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177 out->print(" ");
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178 for (uint i = 0; i < _num_vtimes; i++) {
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179 out->print(" %5.2f", rs_thread_vtime(i));
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180 }
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181 out->cr();
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182 out->print_cr(" Concurrent sampling threads times (s)");
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183 out->print_cr(" %5.2f", sampling_thread_vtime());
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184
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185 HRRSStatsIter blk;
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186 G1CollectedHeap::heap()->heap_region_iterate(&blk);
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187 out->print_cr(" Total heap region rem set sizes = "SIZE_FORMAT"K."
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188 " Max = "SIZE_FORMAT"K.",
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189 blk.total_mem_sz()/K, blk.max_mem_sz()/K);
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190 out->print_cr(" Static structures = "SIZE_FORMAT"K,"
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191 " free_lists = "SIZE_FORMAT"K.",
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192 HeapRegionRemSet::static_mem_size() / K,
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193 HeapRegionRemSet::fl_mem_size() / K);
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194 out->print_cr(" "SIZE_FORMAT" occupied cards represented.",
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195 blk.occupied());
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196 HeapRegion* max_mem_sz_region = blk.max_mem_sz_region();
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197 HeapRegionRemSet* rem_set = max_mem_sz_region->rem_set();
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198 out->print_cr(" Max size region = "HR_FORMAT", "
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199 "size = "SIZE_FORMAT "K, occupied = "SIZE_FORMAT"K.",
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200 HR_FORMAT_PARAMS(max_mem_sz_region),
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201 (rem_set->mem_size() + K - 1)/K,
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202 (rem_set->occupied() + K - 1)/K);
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203
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204 out->print_cr(" Did %d coarsenings.", num_coarsenings());
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205 }