1 /*
  2  * Copyright (c) 2017, 2018, Red Hat, Inc. 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 package gc.epsilon;
 25 
 26 /**
 27  * @test id=default
 28  * @key randomness
 29  * @requires vm.gc.Epsilon & !vm.graal.enabled
 30  * @summary Epsilon sliding GC works
 31  * @library /test/lib
 32  * @run main/othervm/timeout=960 -Xmx512m -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC -XX:+EpsilonSlidingGC
 33  *      gc.epsilon.TestSlidingGC
 34  */
 35 
 36 /**
 37  * @test id=default-verify
 38  * @key randomness
 39  * @requires vm.gc.Epsilon & !vm.graal.enabled
 40  * @summary Epsilon sliding GC works
 41  * @library /test/lib
 42  * @run main/othervm/timeout=960 -Xmx512m -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC -XX:+EpsilonSlidingGC
 43  *      -XX:+EpsilonVerify
 44  *      gc.epsilon.TestSlidingGC
 45  */
 46 
 47 /**
 48  * @test id=default-uncommit
 49  * @key randomness
 50  * @requires vm.gc.Epsilon & !vm.graal.enabled
 51  * @summary Epsilon sliding GC works
 52  * @library /test/lib
 53  * @run main/othervm/timeout=960 -Xmx512m -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC -XX:+EpsilonSlidingGC
 54  *      -XX:+EpsilonUncommit
 55  *      gc.epsilon.TestSlidingGC
 56  */
 57 
 58 /**
 59  * @test id=default-uncommit-verify
 60  * @key randomness
 61  * @requires vm.gc.Epsilon & !vm.graal.enabled
 62  * @summary Epsilon sliding GC works
 63  * @library /test/lib
 64  * @run main/othervm/timeout=960 -Xmx512m -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC -XX:+EpsilonSlidingGC
 65  *      -XX:+EpsilonUncommit
 66  *      -XX:+EpsilonVerify
 67  *      gc.epsilon.TestSlidingGC
 68  */
 69 
 70 /**
 71  * @test id=coh
 72  * @key randomness
 73  * @requires vm.gc.Epsilon & !vm.graal.enabled
 74  * @summary Epsilon sliding GC works
 75  * @library /test/lib
 76  * @run main/othervm/timeout=960 -Xmx512m -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC -XX:+EpsilonSlidingGC
 77  *      -XX:+UseCompactObjectHeaders
 78  *      gc.epsilon.TestSlidingGC
 79  */
 80 
 81 /**
 82  * @test id=coh-verify
 83  * @key randomness
 84  * @requires vm.gc.Epsilon & !vm.graal.enabled
 85  * @summary Epsilon sliding GC works
 86  * @library /test/lib
 87  * @run main/othervm/timeout=960 -Xmx512m -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC -XX:+EpsilonSlidingGC
 88  *      -XX:+UseCompactObjectHeaders
 89  *      -XX:+EpsilonVerify
 90  *      gc.epsilon.TestSlidingGC
 91  */
 92 
 93 /**
 94  * @test id=coh-uncommit
 95  * @key randomness
 96  * @requires vm.gc.Epsilon & !vm.graal.enabled
 97  * @summary Epsilon sliding GC works
 98  * @library /test/lib
 99  * @run main/othervm/timeout=960 -Xmx512m -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC -XX:+EpsilonSlidingGC
100  *      -XX:+UseCompactObjectHeaders
101  *      -XX:+EpsilonUncommit
102  *      gc.epsilon.TestSlidingGC
103  */
104 
105 /**
106  * @test id=coh-uncommit-verify
107  * @key randomness
108  * @requires vm.gc.Epsilon & !vm.graal.enabled
109  * @summary Epsilon sliding GC works
110  * @library /test/lib
111  * @run main/othervm/timeout=960 -Xmx512m -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC -XX:+EpsilonSlidingGC
112  *      -XX:+UseCompactObjectHeaders
113  *      -XX:+EpsilonUncommit
114  *      -XX:+EpsilonVerify
115  *      gc.epsilon.TestSlidingGC
116  */
117 
118 import java.util.concurrent.*;
119 import java.util.Random;
120 
121 import jdk.test.lib.process.OutputAnalyzer;
122 import jdk.test.lib.process.ProcessTools;
123 import jdk.test.lib.Utils;
124 
125 public class TestSlidingGC {
126 
127   static int SIZE  = Integer.getInteger("size", 10_000_000);     // ~160 MB retained
128   static int COUNT = Integer.getInteger("count", 1_000_000_000); // ~240 GB allocation
129 
130   static Object[] sink;
131 
132   public static void main(String... args) {
133     Random r = Utils.getRandomInstance();
134     sink = new Object[SIZE];
135     for (int c = 0; c < COUNT; c++) {
136       sink[r.nextInt(SIZE)] = new Object();
137     }
138   }
139 
140 }