Mercurial > hg > truffle

annotate graal/com.oracle.max.base/src/com/sun/max/profile/Metrics.java @ 4138:82af018d61db

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Merge fixes.
author Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
date Sat, 17 Dec 2011 22:03:44 +0100
parents e233f5660da4
children bc8527f3071c
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1 /*
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2 * Copyright (c) 2007, 2011, 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 package com.sun.max.profile;
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24
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25 import java.io.*;
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26 import java.util.*;
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27 import java.util.Arrays;
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28
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29 import com.sun.max.lang.*;
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30 import com.sun.max.program.*;
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31
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32 /**
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33 * The {@code Metrics} class implements metrics gathering for quick and dirty
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34 * reporting of various events in a program.
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35 */
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36 public final class Metrics {
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37
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38 public static boolean DISABLED;
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39
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40 private Metrics() {
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41 // do nothing.
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42 }
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43
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44 private static boolean enabled;
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45
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46 public interface Metric {
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47 void reset();
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48 void report(String name, PrintStream stream);
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49 }
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50
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51 /**
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52 * This class implements a simple counter that can be both incremented and accumulated.
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53 *
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54 */
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55 public static class Counter implements Metric {
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56 protected int count;
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57 protected long accumulation;
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58
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59 public synchronized void increment() {
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60 count++;
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61 }
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62
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63 public synchronized void accumulate(long value) {
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64 count++;
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65 accumulation += value;
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66 }
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67
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68 public synchronized int getCount() {
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69 return count;
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70 }
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71
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72 public synchronized long getAccumulation() {
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73 return accumulation;
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74 }
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75
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76 public synchronized void reset() {
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77 count = 0;
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78 accumulation = 0;
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79 }
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80
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81 public synchronized void report(String name, PrintStream stream) {
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82 if (accumulation > 0) {
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83 final double average = accumulation / (double) count;
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84 Metrics.report(stream, name, "total", "--", String.valueOf(accumulation), "accumulated");
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85 Metrics.report(stream, name, "average", "--", String.valueOf(average), "accumulated (" + count + " counted)");
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86 } else {
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87 Metrics.report(stream, name, "total", "--", String.valueOf(count), "counted");
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88 }
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89 }
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90 }
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91
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92 public static class Rate implements Metric {
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93
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94 protected final Counter counter;
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95 protected final Clock clock;
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96 protected long firstTicks;
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97 protected long lastAccumulation;
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98 protected long lastTicks;
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99
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100 public Rate(Counter counter, Clock clock) {
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101 this.counter = counter;
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102 this.clock = clock;
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103 firstTicks = clock.getTicks();
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104 lastTicks = firstTicks;
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105 }
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106
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107 public double getRate() {
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108 return (counter.accumulation - lastAccumulation) / (double) (clock.getTicks() - lastTicks);
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109 }
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110
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111 public double getAverageRate() {
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112 return (counter.accumulation) / (double) (clock.getTicks() - firstTicks);
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113 }
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114
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115 public void reset() {
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116 firstTicks = clock.getTicks();
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117 lastTicks = firstTicks;
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118 lastAccumulation = 0;
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119 }
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120
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121 public void resetRate() {
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122 lastAccumulation = counter.accumulation;
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123 lastTicks = clock.getTicks();
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124 }
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125
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126 public void report(String name, PrintStream stream) {
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127 double inst = getRate();
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128 double avg = getAverageRate();
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129 if (clock.getHZ() == 0) {
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130 Metrics.report(stream, name, "inst.", "--", String.valueOf(inst), "/ tick");
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131 Metrics.report(stream, name, "average", "--", String.valueOf(avg), "/ tick");
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132 } else {
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133 inst = inst / clock.getHZ();
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134 avg = avg / clock.getHZ();
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135 Metrics.report(stream, name, "inst.", "--", String.valueOf(inst), "/ second");
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136 Metrics.report(stream, name, "average", "--", String.valueOf(avg), "/ second");
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137 }
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138 }
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139 }
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140
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141 /**
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142 * This class represents a distribution of values that have been recorded. Various
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143 * implementations implement different approximations with different time and space
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144 * tradeoffs.
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145 *
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146 */
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147 public static class Distribution<T> implements Metric {
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148
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149 static class Counted implements Comparable<Counted> {
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150 final int total;
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151 final Object value;
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152
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153 public Counted(Object value, int total) {
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154 this.total = total;
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155 this.value = value;
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156 }
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157
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158 public int compareTo(Counted o) {
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159 if (o.total < total) {
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160 return -1;
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161 } else if (o.total > total) {
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162 return 1;
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163 }
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164 return 0;
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165 }
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166
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167 }
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168
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169 protected int total;
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170
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171 public int getTotal() {
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172 return total;
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173 }
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174
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175 public int getCount(T value) {
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176 return -1;
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177 }
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178
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179 public void reset() {
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180 total = 0;
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181 }
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182
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183 public Map<T, Integer> asMap() {
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184 return Collections.emptyMap();
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185 }
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186
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187 public void report(String name, PrintStream stream) {
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188 stream.println(name + ": ");
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189 final Map<T, Integer> asMap = asMap();
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190 final Counted[] counts = new Counted[asMap.size()];
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191 int i = 0;
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192 for (Map.Entry<T, Integer> entry : asMap.entrySet()) {
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193 counts[i++] = new Counted(entry.getKey(), entry.getValue());
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194 }
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195 Arrays.sort(counts);
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196 for (Counted counted : counts) {
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197 stream.printf(" %-10d : %s\n", counted.total, counted.value);
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198 }
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199 }
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200 }
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201
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202 /**
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203 * This method increments the count of a particular named metric, creating it if necessary.
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204 * @param name the name of the metric to increment
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205 */
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206 public static void increment(String name) {
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207 GlobalMetrics.getCounter(name).increment();
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208 }
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209
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diff changeset
210 /**
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211 * This method increases the accumulation of a particular named metric by the given value.
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212 * Each {@code accumulate()} call counts as a single {@code increment()} call as well.
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213 * @param name the name of the metric to accumulate
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214 * @param value the value to add to the current accumulation
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215 */
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216 public static void accumulate(String name, int value) {
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217 GlobalMetrics.getCounter(name).accumulate(value);
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218 }
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219
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220 public static void trace(int level) {
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221 if (Trace.hasLevel(level)) {
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222 GlobalMetrics.report(Trace.stream());
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223 }
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224 }
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225
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diff changeset
226 public static boolean enabled() {
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227 return enabled;
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228 }
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229
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diff changeset
230 static int longestMetricName = 16;
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diff changeset
231
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diff changeset
232 public static void report(PrintStream out, String metricName, String runName, String benchName, String value, String units) {
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diff changeset
233 out.print("@metric ");
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diff changeset
234 out.print(Strings.padLengthWithSpaces(metricName, longestMetricName + 1));
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diff changeset
235 out.print(" ");
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diff changeset
236 out.print(Strings.padLengthWithSpaces(runName, 9));
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diff changeset
237 out.print(" ");
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diff changeset
238 out.print(Strings.padLengthWithSpaces(benchName, 18));
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diff changeset
239 out.print(" ");
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diff changeset
240 out.print(Strings.padLengthWithSpaces(20, value));
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diff changeset
241 out.print(" ");
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
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diff changeset
242 out.print(units);
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
243 out.println("");
e233f5660da4 Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
244 }
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diff changeset
245
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
246 public static void enable(boolean enable) {
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
247 enabled = enable;
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
248 }
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diff changeset
249 }