1 /* 2 * Copyright (C) 2013 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 public class Main { 18 private static final int TEST_TIME = 5; 19 20 public static void main(String[] args) { 21 System.out.println("Running (" + TEST_TIME + " seconds) ..."); 22 InfiniteForLoop forLoop = new InfiniteForLoop(); 23 InfiniteWhileLoop whileLoop = new InfiniteWhileLoop(); 24 InfiniteDoWhileLoop doWhileLoop = new InfiniteDoWhileLoop(); 25 MakeGarbage garbage = new MakeGarbage(); 26 forLoop.start(); 27 whileLoop.start(); 28 doWhileLoop.start(); 29 garbage.start(); 30 for (int i = 0; i < TEST_TIME; i++) { 31 Runtime.getRuntime().gc(); 32 System.out.println("."); 33 sleep(1000); 34 } 35 forLoop.stopNow(); 36 whileLoop.stopNow(); 37 doWhileLoop.stopNow(); 38 garbage.stopNow(); 39 System.out.println("Done."); 40 } 41 42 public static void sleep(int ms) { 43 try { 44 Thread.sleep(ms); 45 } catch (InterruptedException ie) { 46 System.err.println("sleep was interrupted"); 47 } 48 } 49 } 50 51 class InfiniteWhileLoop extends Thread { 52 volatile private boolean keepGoing = true; 53 public void run() { 54 int i = 0; 55 while (keepGoing) { 56 i++; 57 } 58 } 59 public void stopNow() { 60 keepGoing = false; 61 } 62 } 63 64 class InfiniteDoWhileLoop extends Thread { 65 volatile private boolean keepGoing = true; 66 public void run() { 67 int i = 0; 68 do { 69 i++; 70 } while (keepGoing); 71 } 72 public void stopNow() { 73 keepGoing = false; 74 } 75 } 76 77 class InfiniteForLoop extends Thread { 78 int count = 100000; 79 volatile private boolean keepGoing = true; 80 public void run() { 81 int i = 0; 82 for (int j = 0; keepGoing; j++) { 83 i += j; 84 } 85 } 86 public void stopNow() { 87 keepGoing = false; 88 } 89 } 90 91 92 class MakeGarbage extends Thread { 93 volatile private boolean keepGoing = true; 94 public void run() { 95 while (keepGoing) { 96 byte[] garbage = new byte[100000]; 97 } 98 } 99 public void stopNow() { 100 keepGoing = false; 101 } 102 } 103
