Mercurial > hg > graal-compiler
annotate graal/com.oracle.max.base/src/com/sun/max/profile/Metrics.java @ 3733:e233f5660da4
Added Java files from Maxine project.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Sat, 17 Dec 2011 19:59:18 +0100 |
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children | bc8527f3071c |
rev | line source |
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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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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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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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230 static int longestMetricName = 16; |
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231 |
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232 public static void report(PrintStream out, String metricName, String runName, String benchName, String value, String units) { |
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233 out.print("@metric "); |
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234 out.print(Strings.padLengthWithSpaces(metricName, longestMetricName + 1)); |
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235 out.print(" "); |
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236 out.print(Strings.padLengthWithSpaces(runName, 9)); |
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237 out.print(" "); |
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238 out.print(Strings.padLengthWithSpaces(benchName, 18)); |
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239 out.print(" "); |
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240 out.print(Strings.padLengthWithSpaces(20, value)); |
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241 out.print(" "); |
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242 out.print(units); |
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243 out.println(""); |
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|
244 } |
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245 |
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246 public static void enable(boolean enable) { |
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247 enabled = enable; |
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248 } |
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249 } |