1 /* 2 * Copyright (C) 2008 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 import java.util.List; 18 import java.util.ArrayList; 19 import java.io.Serializable; 20 21 /** 22 * An operation with a duration. Could represent a class load or initialization. 23 */ 24 class Operation implements Serializable { 25 26 private static final long serialVersionUID = 0; 27 28 /** 29 * Type of operation. 30 */ 31 enum Type { 32 LOAD, INIT 33 } 34 35 /** Process this operation occurred in. */ 36 final Proc process; 37 38 /** Start time for this operation. */ 39 final long startTimeNanos; 40 41 /** Index of this operation relative to its process. */ 42 final int index; 43 44 /** Type of operation. */ 45 final Type type; 46 47 /** End time for this operation. */ 48 long endTimeNanos = -1; 49 50 /** The class that this operation loaded or initialized. */ 51 final LoadedClass loadedClass; 52 53 /** Other operations that occurred during this one. */ 54 final List<Operation> subops = new ArrayList<Operation>(); 55 56 /** Constructs a new operation. */ Operation(Proc process, LoadedClass loadedClass, long startTimeNanos, int index, Type type)57 Operation(Proc process, LoadedClass loadedClass, long startTimeNanos, 58 int index, Type type) { 59 this.process = process; 60 this.loadedClass = loadedClass; 61 this.startTimeNanos = startTimeNanos; 62 this.index = index; 63 this.type = type; 64 } 65 66 /** 67 * Returns how long this class initialization and all the nested class 68 * initializations took. 69 */ inclusiveTimeNanos()70 private long inclusiveTimeNanos() { 71 if (endTimeNanos == -1) { 72 throw new IllegalStateException("End time hasn't been set yet: " 73 + loadedClass.name); 74 } 75 76 return endTimeNanos - startTimeNanos; 77 } 78 79 /** 80 * Returns how long this class initialization took. 81 */ exclusiveTimeMicros()82 int exclusiveTimeMicros() { 83 long exclusive = inclusiveTimeNanos(); 84 85 for (Operation child : subops) { 86 exclusive -= child.inclusiveTimeNanos(); 87 } 88 89 if (exclusive < 0) { 90 throw new AssertionError(loadedClass.name); 91 } 92 93 return nanosToMicros(exclusive); 94 } 95 96 /** Gets the median time that this operation took across all processes. */ medianExclusiveTimeMicros()97 int medianExclusiveTimeMicros() { 98 switch (type) { 99 case LOAD: return loadedClass.medianLoadTimeMicros(); 100 case INIT: return loadedClass.medianInitTimeMicros(); 101 default: throw new AssertionError(); 102 } 103 } 104 105 /** 106 * Converts nanoseconds to microseconds. 107 * 108 * @throws RuntimeException if overflow occurs 109 */ nanosToMicros(long nanos)110 private static int nanosToMicros(long nanos) { 111 long micros = nanos / 1000; 112 int microsInt = (int) micros; 113 if (microsInt != micros) { 114 throw new RuntimeException("Integer overflow: " + nanos); 115 } 116 return microsInt; 117 } 118 119 /** 120 * Primarily for debugger support 121 */ 122 @Override toString()123 public String toString() { 124 StringBuilder sb = new StringBuilder(); 125 sb.append(type.toString()); 126 sb.append(' '); 127 sb.append(loadedClass.toString()); 128 if (subops.size() > 0) { 129 sb.append(" ("); 130 sb.append(subops.size()); 131 sb.append(" sub ops)"); 132 } 133 return sb.toString(); 134 } 135 136 } 137