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annotate src/share/vm/gc_implementation/g1/g1RemSetSummary.hpp @ 12233:40136aa2cdb1

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8010722: assert: failed: heap size is too big for compressed oops Summary: Use conservative assumptions of required alignment for the various garbage collector components into account when determining the maximum heap size that supports compressed oops. Using this conservative value avoids several circular dependencies in the calculation. Reviewed-by: stefank, dholmes
author tschatzl
date Wed, 11 Sep 2013 16:25:02 +0200
parents e72f7eecc96d
children 7ec10139bf37
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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 #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_G1REMSETSUMMARY_HPP
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26 #define SHARE_VM_GC_IMPLEMENTATION_G1_G1REMSETSUMMARY_HPP
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27
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28 #include "utilities/ostream.hpp"
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29
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30 class G1RemSet;
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31
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32 // A G1RemSetSummary manages statistical information about the G1RemSet
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33
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34 class G1RemSetSummary VALUE_OBJ_CLASS_SPEC {
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35 private:
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36 friend class GetRSThreadVTimeClosure;
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37
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38 G1RemSet* _remset;
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39
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40 G1RemSet* remset() const {
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41 return _remset;
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42 }
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43
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44 size_t _num_refined_cards;
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45 size_t _num_processed_buf_mutator;
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46 size_t _num_processed_buf_rs_threads;
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47
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48 size_t _num_coarsenings;
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49
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50 double* _rs_threads_vtimes;
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51 size_t _num_vtimes;
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52
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53 double _sampling_thread_vtime;
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54
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55 void set_rs_thread_vtime(uint thread, double value);
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56 void set_sampling_thread_vtime(double value) {
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57 _sampling_thread_vtime = value;
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58 }
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59
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60 void free_and_null() {
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61 if (_rs_threads_vtimes) {
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62 FREE_C_HEAP_ARRAY(double, _rs_threads_vtimes, mtGC);
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63 _rs_threads_vtimes = NULL;
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64 _num_vtimes = 0;
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65 }
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66 }
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67
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68 // update this summary with current data from various places
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69 void update();
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70
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71 public:
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72 G1RemSetSummary() : _remset(NULL), _num_refined_cards(0),
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73 _num_processed_buf_mutator(0), _num_processed_buf_rs_threads(0), _num_coarsenings(0),
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74 _rs_threads_vtimes(NULL), _num_vtimes(0), _sampling_thread_vtime(0.0f) {
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75 }
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76
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77 ~G1RemSetSummary() {
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78 free_and_null();
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79 }
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80
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81 // set the counters in this summary to the values of the others
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82 void set(G1RemSetSummary* other);
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83 // subtract all counters from the other summary, and set them in the current
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84 void subtract_from(G1RemSetSummary* other);
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85
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86 // initialize and get the first sampling
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87 void initialize(G1RemSet* remset, uint num_workers);
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88
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89 void print_on(outputStream* out);
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90
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91 double rs_thread_vtime(uint thread) const;
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92
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93 double sampling_thread_vtime() const {
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94 return _sampling_thread_vtime;
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95 }
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96
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97 size_t num_concurrent_refined_cards() const {
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98 return _num_refined_cards;
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99 }
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100
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101 size_t num_processed_buf_mutator() const {
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102 return _num_processed_buf_mutator;
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103 }
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104
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105 size_t num_processed_buf_rs_threads() const {
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106 return _num_processed_buf_rs_threads;
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107 }
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108
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109 size_t num_processed_buf_total() const {
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110 return num_processed_buf_mutator() + num_processed_buf_rs_threads();
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111 }
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112
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113 size_t num_coarsenings() const {
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114 return _num_coarsenings;
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115 }
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116 };
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117
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118 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1REMSETSUMMARY_HPP