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annotate graal/com.oracle.jvmci.meta/src/com/oracle/jvmci/meta/ProfilingInfo.java @ 21556:48c1ebd24120

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renamed com.oracle.graal.api[meta|code] modules to com.oracle.jvmci.[meta|code] (JBS:GRAAL-53)
author Doug Simon <doug.simon@oracle.com>
date Wed, 27 May 2015 00:36:16 +0200
parents graal/com.oracle.graal.api.meta/src/com/oracle/graal/api/meta/ProfilingInfo.java@70d565f6e127
children
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1 /*
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2 * Copyright (c) 2012, 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.jvmci.meta;
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24
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25 /**
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26 * Provides access to the profiling information of one specific method. Every accessor method
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27 * returns the information that is available at the time of invocation. If a method is invoked
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28 * multiple times, it may return significantly different results for every invocation as the
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29 * profiling information may be changed by other Java threads at any time.
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30 */
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31 public interface ProfilingInfo {
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32
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33 /**
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34 * Returns the length of the bytecodes associated with this profile.
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35 */
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36 int getCodeSize();
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37
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38 /**
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39 * Returns an estimate of how often the branch at the given byte code was taken.
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40 *
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41 * @return The estimated probability, with 0.0 meaning never and 1.0 meaning always, or -1 if
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42 * this information is not available.
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43 */
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44 double getBranchTakenProbability(int bci);
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45
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46 /**
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47 * Returns an estimate of how often the switch cases are taken at the given BCI. The default
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48 * case is stored as the last entry.
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49 *
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50 * @return A double value that contains the estimated probabilities, with 0.0 meaning never and
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51 * 1.0 meaning always, or -1 if this information is not available.
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52 */
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53 double[] getSwitchProbabilities(int bci);
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54
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55 /**
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56 * Returns the TypeProfile for the given BCI.
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57 *
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58 * @return Returns a JavaTypeProfile object, or null if not available.
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59 */
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60 JavaTypeProfile getTypeProfile(int bci);
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61
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62 /**
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63 * Returns the MethodProfile for the given BCI.
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64 *
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65 * @return Returns a JavaMethodProfile object, or null if not available.
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66 */
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67 JavaMethodProfile getMethodProfile(int bci);
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68
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69 /**
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70 * Returns information if the given BCI did ever throw an exception.
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71 *
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72 * @return {@link TriState#TRUE} if the instruction has thrown an exception at least once,
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73 * {@link TriState#FALSE} if it never threw an exception, and {@link TriState#UNKNOWN}
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74 * if this information was not recorded.
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75 */
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76 TriState getExceptionSeen(int bci);
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77
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78 /**
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79 * Returns information if null was ever seen for the given BCI. This information is collected
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80 * for the aastore, checkcast and instanceof bytecodes.
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81 *
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82 * @return {@link TriState#TRUE} if null was seen for the instruction, {@link TriState#FALSE} if
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83 * null was NOT seen, and {@link TriState#UNKNOWN} if this information was not recorded.
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84 */
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85 TriState getNullSeen(int bci);
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86
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87 /**
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88 * Returns an estimate how often the current BCI was executed. Avoid comparing execution counts
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89 * to each other, as the returned value highly depends on the time of invocation.
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90 *
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91 * @return the estimated execution count or -1 if not available.
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92 */
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93 int getExecutionCount(int bci);
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94
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95 /**
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96 * Returns how frequently a method was deoptimized for the given deoptimization reason. This
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97 * only indicates how often the method did fall back to the interpreter for the execution and
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98 * does not indicate how often it was recompiled.
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99 *
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100 * @param reason the reason for which the number of deoptimizations should be queried
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101 * @return the number of times the compiled method deoptimized for the given reason.
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102 */
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103 int getDeoptimizationCount(DeoptimizationReason reason);
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104
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105 /**
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106 * Records the size of the compiler intermediate representation (IR) associated with this
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107 * method.
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108 *
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109 * @param irType the IR type for which the size is being recorded
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110 * @param irSize the IR size to be recorded. The unit depends on the IR.
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111 * @return whether recording this information for {@code irType} is supported
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112 */
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113 boolean setCompilerIRSize(Class<?> irType, int irSize);
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114
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115 /**
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116 * Gets the size of the compiler intermediate representation (IR) associated with this method
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117 * last recorded by {@link #setCompilerIRSize(Class, int)}.
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118 *
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119 * @param irType the IR type for which the size is being requested
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120 * @return the requested IR size or -1 if it is unavailable for {@code irType}
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121 */
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122 int getCompilerIRSize(Class<?> irType);
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123
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124 /**
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125 * Returns true if the profiling information can be assumed as sufficiently accurate.
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126 *
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127 * @return true if the profiling information was recorded often enough mature enough, false
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128 * otherwise.
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129 */
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130 boolean isMature();
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131
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132 /**
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133 * Force data to be treated as mature if possible.
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134 */
af344056124f Only use mature method datas
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135 void setMature();
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136
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137 /**
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138 * Formats this profiling information to a string.
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139 *
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140 * @param method an optional method that augments the profile string returned
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141 * @param sep the separator to use for each separate profile record
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142 */
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143 default String toString(ResolvedJavaMethod method, String sep) {
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144 StringBuilder buf = new StringBuilder(100);
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145 if (method != null) {
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146 buf.append(String.format("canBeStaticallyBound: %b%s", method.canBeStaticallyBound(), sep));
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147 }
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148 for (int i = 0; i < getCodeSize(); i++) {
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149 if (getExecutionCount(i) != -1) {
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150 buf.append(String.format("executionCount@%d: %d%s", i, getExecutionCount(i), sep));
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151 }
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152
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153 if (getBranchTakenProbability(i) != -1) {
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154 buf.append(String.format("branchProbability@%d: %.6f%s", i, getBranchTakenProbability(i), sep));
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155 }
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156
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157 double[] switchProbabilities = getSwitchProbabilities(i);
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158 if (switchProbabilities != null) {
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159 buf.append(String.format("switchProbabilities@%d:", i));
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160 for (int j = 0; j < switchProbabilities.length; j++) {
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161 buf.append(String.format(" %.6f", switchProbabilities[j]));
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162 }
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163 buf.append(sep);
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164 }
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165
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166 if (getExceptionSeen(i) != TriState.UNKNOWN) {
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167 buf.append(String.format("exceptionSeen@%d: %s%s", i, getExceptionSeen(i).name(), sep));
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168 }
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169
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170 if (getNullSeen(i) != TriState.UNKNOWN) {
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171 buf.append(String.format("nullSeen@%d: %s%s", i, getNullSeen(i).name(), sep));
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172 }
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173
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174 JavaTypeProfile typeProfile = getTypeProfile(i);
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175 MetaUtil.appendProfile(buf, typeProfile, i, "types", sep);
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176
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177 JavaMethodProfile methodProfile = getMethodProfile(i);
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178 MetaUtil.appendProfile(buf, methodProfile, i, "methods", sep);
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179 }
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180
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181 boolean firstDeoptReason = true;
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182 for (DeoptimizationReason reason : DeoptimizationReason.values()) {
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183 int count = getDeoptimizationCount(reason);
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184 if (count > 0) {
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185 if (firstDeoptReason) {
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186 buf.append("deoptimization history").append(sep);
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187 firstDeoptReason = false;
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188 }
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189 buf.append(String.format(" %s: %d%s", reason.name(), count, sep));
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190 }
cac0a7d1c325 moved profileToString(ProfilingInfo info, ResolvedJavaMethod method, String sep) from MetaUtil to be a default method in ProfilingInfo
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diff changeset
191 }
cac0a7d1c325 moved profileToString(ProfilingInfo info, ResolvedJavaMethod method, String sep) from MetaUtil to be a default method in ProfilingInfo
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diff changeset
192 if (buf.length() == 0) {
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193 return "";
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194 }
cac0a7d1c325 moved profileToString(ProfilingInfo info, ResolvedJavaMethod method, String sep) from MetaUtil to be a default method in ProfilingInfo
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diff changeset
195 String s = buf.toString();
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196 return s.substring(0, s.length() - sep.length());
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197 }
cac0a7d1c325 moved profileToString(ProfilingInfo info, ResolvedJavaMethod method, String sep) from MetaUtil to be a default method in ProfilingInfo
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diff changeset
198
4439
f7251c729b31 profiling info first try
Christian Haeubl <christian.haeubl@oracle.com>
parents:
diff changeset
199 }