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annotate src/share/vm/oops/methodCounters.hpp @ 10408:836a62f43af9

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Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/
author Doug Simon <doug.simon@oracle.com>
date Wed, 19 Jun 2013 10:45:56 +0200
parents aeaca88565e6
children 88672775a26c
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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_OOPS_METHODCOUNTERS_HPP
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26 #define SHARE_VM_OOPS_METHODCOUNTERS_HPP
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27
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28 #include "oops/metadata.hpp"
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29 #include "interpreter/invocationCounter.hpp"
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30
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31 class MethodCounters: public MetaspaceObj {
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32 friend class VMStructs;
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33 private:
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34 int _interpreter_invocation_count; // Count of times invoked (reused as prev_event_count in tiered)
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35 u2 _interpreter_throwout_count; // Count of times method was exited via exception while interpreting
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36 u2 _number_of_breakpoints; // fullspeed debugging support
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37 InvocationCounter _invocation_counter; // Incremented before each activation of the method - used to trigger frequency-based optimizations
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38 InvocationCounter _backedge_counter; // Incremented before each backedge taken - used to trigger frequencey-based optimizations
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39
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40 #ifdef GRAAL
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41 jlong _graal_invocation_time;
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42 int _graal_priority;
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43 #endif
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44 #ifdef TIERED
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45 float _rate; // Events (invocation and backedge counter increments) per millisecond
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46 jlong _prev_time; // Previous time the rate was acquired
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47 #endif
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48
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49 MethodCounters() : _interpreter_invocation_count(0),
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50 _interpreter_throwout_count(0),
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51 _number_of_breakpoints(0)
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52 #ifdef TIERED
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53 , _rate(0),
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54 _prev_time(0)
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55 #endif
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56 {
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57 invocation_counter()->init();
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58 backedge_counter()->init();
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59 }
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60
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61 public:
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62 static MethodCounters* allocate(ClassLoaderData* loader_data, TRAPS);
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63
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64 void deallocate_contents(ClassLoaderData* loader_data) {}
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65 DEBUG_ONLY(bool on_stack() { return false; }) // for template
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66
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67 static int size() { return sizeof(MethodCounters) / wordSize; }
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68
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69 bool is_klass() const { return false; }
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70
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71 void clear_counters();
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72
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73 int interpreter_invocation_count() {
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74 return _interpreter_invocation_count;
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75 }
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76 void set_interpreter_invocation_count(int count) {
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77 _interpreter_invocation_count = count;
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78 }
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79 int increment_interpreter_invocation_count() {
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80 return ++_interpreter_invocation_count;
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81 }
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82
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83 void interpreter_throwout_increment() {
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84 if (_interpreter_throwout_count < 65534) {
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85 _interpreter_throwout_count++;
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86 }
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87 }
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88 int interpreter_throwout_count() const {
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89 return _interpreter_throwout_count;
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90 }
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91 void set_interpreter_throwout_count(int count) {
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92 _interpreter_throwout_count = count;
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93 }
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94
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95 u2 number_of_breakpoints() const { return _number_of_breakpoints; }
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96 void incr_number_of_breakpoints() { ++_number_of_breakpoints; }
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97 void decr_number_of_breakpoints() { --_number_of_breakpoints; }
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98 void clear_number_of_breakpoints() { _number_of_breakpoints = 0; }
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99
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100 #ifdef GRAAL
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101 void set_graal_invocation_time(jlong time) { _graal_invocation_time = time; }
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102 jlong graal_invocation_time() { return _graal_invocation_time; }
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103
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104 void set_graal_priority(int prio) { _graal_priority = prio; }
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105 int graal_priority() { return _graal_priority; }
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106 #endif // GRAAL
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107
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108
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109 #ifdef TIERED
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110 jlong prev_time() const { return _prev_time; }
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111 void set_prev_time(jlong time) { _prev_time = time; }
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112 float rate() const { return _rate; }
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113 void set_rate(float rate) { _rate = rate; }
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114 #endif
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115
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116 // invocation counter
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117 InvocationCounter* invocation_counter() { return &_invocation_counter; }
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118 InvocationCounter* backedge_counter() { return &_backedge_counter; }
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119
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120 static ByteSize interpreter_invocation_counter_offset() {
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121 return byte_offset_of(MethodCounters, _interpreter_invocation_count);
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122 }
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123
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124 static ByteSize invocation_counter_offset() {
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125 return byte_offset_of(MethodCounters, _invocation_counter);
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126 }
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127
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128 static ByteSize backedge_counter_offset() {
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129 return byte_offset_of(MethodCounters, _backedge_counter);
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130 }
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131
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132 static int interpreter_invocation_counter_offset_in_bytes() {
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133 return offset_of(MethodCounters, _interpreter_invocation_count);
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134 }
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135
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136 };
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137 #endif //SHARE_VM_OOPS_METHODCOUNTERS_HPP