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131 lines
3.4 KiB
131 lines
3.4 KiB
/*
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* Copyright (C) 2008 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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import java.io.Serializable;
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import java.util.*;
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/**
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* A loaded class.
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*/
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class LoadedClass implements Serializable, Comparable<LoadedClass> {
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private static final long serialVersionUID = 0;
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/** Class name. */
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final String name;
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/** Load operations. */
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final List<Operation> loads = new ArrayList<Operation>();
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/** Static initialization operations. */
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final List<Operation> initializations = new ArrayList<Operation>();
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/** Memory usage gathered by loading only this class in its own VM. */
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MemoryUsage memoryUsage = MemoryUsage.NOT_AVAILABLE;
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/**
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* Whether or not this class was loaded in the system class loader.
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*/
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final boolean systemClass;
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/** Whether or not this class will be preloaded. */
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boolean preloaded;
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/** Constructs a new class. */
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LoadedClass(String name, boolean systemClass) {
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this.name = name;
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this.systemClass = systemClass;
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}
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void measureMemoryUsage() {
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this.memoryUsage = MemoryUsage.forClass(name);
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}
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int mlt = -1;
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/** Median time to load this class. */
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int medianLoadTimeMicros() {
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if (mlt != -1) {
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return mlt;
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}
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return mlt = calculateMedian(loads);
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}
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int mit = -1;
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/** Median time to initialize this class. */
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int medianInitTimeMicros() {
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if (mit != -1) {
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return mit;
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}
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return mit = calculateMedian(initializations);
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}
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int medianTimeMicros() {
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return medianInitTimeMicros() + medianLoadTimeMicros();
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}
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/** Calculates the median duration for a list of operations. */
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private static int calculateMedian(List<Operation> operations) {
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int size = operations.size();
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if (size == 0) {
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return 0;
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}
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int[] times = new int[size];
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for (int i = 0; i < size; i++) {
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times[i] = operations.get(i).exclusiveTimeMicros();
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}
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Arrays.sort(times);
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int middle = size / 2;
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if (size % 2 == 1) {
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// Odd
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return times[middle];
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} else {
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// Even -- average the two.
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return (times[middle - 1] + times[middle]) / 2;
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}
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}
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/** Returns names of processes that loaded this class. */
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Set<String> processNames() {
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Set<String> names = new HashSet<String>();
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addProcessNames(loads, names);
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addProcessNames(initializations, names);
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return names;
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}
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private void addProcessNames(List<Operation> ops, Set<String> names) {
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for (Operation operation : ops) {
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if (operation.process.fromZygote()) {
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names.add(operation.process.name);
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}
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}
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}
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public int compareTo(LoadedClass o) {
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return name.compareTo(o.name);
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}
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@Override
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public String toString() {
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return name;
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}
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}
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