1 /* 2 * Copyright (c) 2002, 2018, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 25 /* 26 * @test 27 * @key stress gc 28 * 29 * @summary converted from VM Testbase gc/gctests/ThreadGC. 30 * VM Testbase keywords: [gc, stress, stressopt, nonconcurrent] 31 * VM Testbase readme: 32 * This tests attempts to stress the garbage collector my making 33 * synchronous calls to the garbage collector after producing garbage. 34 * The garbage collector is invoked in a separate thread. 35 * The test runs for one minute (see nsk.share.runner.ThreadsRunner and 36 * nsk.share.runner.RunParams. It passes if no exceptions are generated. 37 * 38 * @library /vmTestbase 39 * /test/lib 40 * @run driver jdk.test.lib.FileInstaller . . 41 * @run main/othervm gc.gctests.ThreadGC.ThreadGC -gp random(arrays) -ms low 42 */ 43 44 package gc.gctests.ThreadGC; 45 46 import nsk.share.gc.*; 47 import nsk.share.gc.gp.*; 48 import java.util.*; 49 50 public class ThreadGC extends ThreadedGCTest implements GarbageProducerAware, MemoryStrategyAware { 51 private GarbageProducer garbageProducer; 52 private MemoryStrategy memoryStrategy; 53 private Reclaimer reclaimer; 54 private int count; 55 private long size; 56 57 private class Devourer implements Runnable { 58 private Object[] arr = null; 59 private int index; 60 61 public void run() { 62 if (arr == null || index >= count) { 63 arr = null; 64 arr = new Object[count]; 65 index = 0; 66 synchronized (reclaimer) { 67 reclaimer.notify(); 68 } 69 } 70 arr[index] = garbageProducer.create(size); 71 ++index; 72 } 73 } 74 75 private class Reclaimer implements Runnable { 76 private long waitTime = 1000; 77 78 public void run() { 79 try { 80 synchronized (this) { 81 this.wait(waitTime); 82 } 83 } catch (InterruptedException e) { 84 } 85 System.gc(); 86 } 87 } 88 89 protected Runnable createRunnable(int i) { 90 if (i == 0) 91 return new Devourer(); 92 else if (i == 1) { 93 reclaimer = new Reclaimer(); 94 return reclaimer; 95 } else 96 return null; 97 } 98 99 public void run() { 100 size = GarbageUtils.getArraySize(runParams.getTestMemory(), memoryStrategy); 101 count = GarbageUtils.getArrayCount(runParams.getTestMemory(), memoryStrategy); 102 runParams.setIterations(count); 103 super.run(); 104 } 105 106 public static void main(String[] args) { 107 GC.runTest(new ThreadGC(), args); 108 } 109 110 public void setGarbageProducer(GarbageProducer garbageProducer) { 111 this.garbageProducer = garbageProducer; 112 } 113 114 public void setMemoryStrategy(MemoryStrategy memoryStrategy) { 115 this.memoryStrategy = memoryStrategy; 116 } 117 118 }