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annotate graal/com.oracle.max.criutils/src/com/oracle/max/criutils/SnapshotProfilingInfo.java @ 5346:4c3d953f8131

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added mechanism (enabled by -G:PICache and -G:PiFilter) for saving/loading method profiling info to/from disk
author Doug Simon <doug.simon@oracle.com>
date Thu, 03 May 2012 13:39:45 +0200
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children 56860d3f9f39
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5346
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1 /*
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2 * Copyright (c) 2012, 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.oracle.max.criutils;
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24
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25 import java.io.*;
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26
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27 import com.oracle.max.cri.ci.*;
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28 import com.oracle.max.cri.ri.*;
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29
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30 /**
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31 * A profiling info snapshot that can be {@linkplain #save(File, File) saved} to
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32 * and {@linkplain #load(File, RiRuntime) loaded} from a file.
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33 */
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34 public class SnapshotProfilingInfo implements RiProfilingInfo, Serializable {
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35
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36 private static final long serialVersionUID = -5837615128782960391L;
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37 private final double[] branchTaken;
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38 private final double[][] switches;
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39 private final RiTypeProfile[] typeProfiles;
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40 private final RiExceptionSeen[] exceptions;
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41 private final int[] executions;
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42 private final int[] deopts;
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43
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44 public SnapshotProfilingInfo(RiProfilingInfo other) {
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45 int codeSize = other.codeSize();
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46 branchTaken = new double[codeSize];
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47 switches = new double[codeSize][];
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48 typeProfiles = new RiTypeProfile[codeSize];
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49 exceptions = new RiExceptionSeen[codeSize];
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50 executions = new int[codeSize];
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51 deopts = new int[RiDeoptReason.values().length];
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52
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53 for (int bci = 0; bci < codeSize; bci++) {
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54 executions[bci] = other.getExecutionCount(bci);
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55 exceptions[bci] = other.getExceptionSeen(bci);
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56 branchTaken[bci] = other.getBranchTakenProbability(bci);
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57 switches[bci] = other.getSwitchProbabilities(bci);
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58 typeProfiles[bci] = other.getTypeProfile(bci);
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59 }
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60 for (RiDeoptReason reason: RiDeoptReason.values()) {
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61 deopts[reason.ordinal()] = other.getDeoptimizationCount(reason);
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62 }
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63 }
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64
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65 @Override
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66 public int codeSize() {
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67 return branchTaken.length;
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68 }
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69
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70 public double getBranchTakenProbability(int bci) {
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71 return bci < branchTaken.length ? branchTaken[bci] : -1D;
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72 }
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73 public double[] getSwitchProbabilities(int bci) {
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74 return bci < switches.length ? switches[bci] : null;
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75 }
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76 public RiTypeProfile getTypeProfile(int bci) {
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77 return bci < typeProfiles.length ? typeProfiles[bci] : null;
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78 }
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79 public RiExceptionSeen getExceptionSeen(int bci) {
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80 return bci < exceptions.length ? exceptions[bci] : RiExceptionSeen.NOT_SUPPORTED;
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81 }
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82 public int getExecutionCount(int bci) {
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83 return bci < executions.length ? executions[bci] : -1;
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84 }
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85 public int getDeoptimizationCount(RiDeoptReason reason) {
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86 return deopts[reason.ordinal()];
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87 }
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88
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89 @Override
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90 public String toString() {
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91 return CiUtil.profileToString(this, null, "; ");
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92 }
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93
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94 /**
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95 * Deserializes a profile snapshot from a file.
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96 *
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97 * @param file a file created by {@link #save(File, File)}
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98 * @param runtime the runtime used to resolve {@link RiResolvedType}s during deserialization
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99 * @return
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100 * @throws ClassNotFoundException
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101 * @throws IOException
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102 */
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103 public static SnapshotProfilingInfo load(File file, RiRuntime runtime) throws ClassNotFoundException, IOException {
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104 SnapshotProfilingInfo.SnapshotObjectInputStream ois = new SnapshotObjectInputStream(new BufferedInputStream(new FileInputStream(file), (int) file.length()), runtime);
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105 try {
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106 return (SnapshotProfilingInfo) ois.readObject();
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107 } finally {
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108 ois.close();
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109 }
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110 }
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111
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112 /**
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113 * Serializes this snapshot to a file.
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114 *
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115 * @param file the file to which this snapshot is serialized
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116 * @param txtFile
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117 * @throws IOException
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118 */
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119 public void save(File file, File txtFile) throws IOException {
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120 SnapshotProfilingInfo.SnapshotObjectOutputStream oos = new SnapshotObjectOutputStream(new FileOutputStream(file));
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121 try {
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122 oos.writeObject(this);
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123 } finally {
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124 oos.close();
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125 }
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126 if (txtFile != null) {
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127 PrintStream out = new PrintStream(txtFile);
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128 try {
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129 out.println(CiUtil.profileToString(this, null, CiUtil.NEW_LINE));
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130 } finally {
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131 out.close();
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132 }
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133 }
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134 }
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135
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136 static class RiResolvedTypePlaceholder implements Serializable {
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137 private static final long serialVersionUID = -5149982457010023916L;
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138 final Class javaMirror;
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139 public RiResolvedTypePlaceholder(Class javaMirror) {
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140 this.javaMirror = javaMirror;
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141 }
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142 }
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143
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144 static class SnapshotObjectOutputStream extends ObjectOutputStream {
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145 public SnapshotObjectOutputStream(OutputStream out) throws IOException {
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146 super(out);
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147 enableReplaceObject(true);
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148 }
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149
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150 @Override
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151 protected Object replaceObject(Object obj) throws IOException {
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152 if (obj instanceof RiResolvedType) {
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153 return new RiResolvedTypePlaceholder(((RiResolvedType) obj).toJava());
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154 }
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155 return obj;
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156 }
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157 }
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158
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159 static class SnapshotObjectInputStream extends ObjectInputStream {
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160 private final RiRuntime runtime;
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161 public SnapshotObjectInputStream(InputStream in, RiRuntime runtime) throws IOException {
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162 super(in);
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163 enableResolveObject(true);
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164 this.runtime = runtime;
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165 }
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166
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167 @Override
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168 protected Object resolveObject(Object obj) throws IOException {
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169 if (obj instanceof SnapshotProfilingInfo.RiResolvedTypePlaceholder) {
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170 RiResolvedType type = runtime.getType(((SnapshotProfilingInfo.RiResolvedTypePlaceholder) obj).javaMirror);
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171 return type;
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172 }
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173 return obj;
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174 }
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175 }
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176 }