1 /*
  2  * Copyright (c) 2017, 2018, Red Hat, Inc. All rights reserved.
  3  * Copyright Amazon.com Inc. or its affiliates. All Rights Reserved.
  4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  5  *
  6  * This code is free software; you can redistribute it and/or modify it
  7  * under the terms of the GNU General Public License version 2 only, as
  8  * published by the Free Software Foundation.
  9  *
 10  * This code is distributed in the hope that it will be useful, but WITHOUT
 11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 13  * version 2 for more details (a copy is included in the LICENSE file that
 14  * accompanied this code).
 15  *
 16  * You should have received a copy of the GNU General Public License version
 17  * 2 along with this work; if not, write to the Free Software Foundation,
 18  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 19  *
 20  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 21  * or visit www.oracle.com if you need additional information or have any
 22  * questions.
 23  *
 24  */
 25 
 26 /*
 27  * @test id=passive
 28  * @requires vm.gc.Shenandoah
 29  *
 30  * @run main/othervm/timeout=480 -Xmx16m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
 31  *      -XX:+UseShenandoahGC -XX:ShenandoahGCMode=passive
 32  *      -XX:+ShenandoahDegeneratedGC
 33  *      -Dtarget=10000
 34  *      TestLotsOfCycles
 35  *
 36  * @run main/othervm/timeout=480 -Xmx16m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
 37  *      -XX:+UseShenandoahGC -XX:ShenandoahGCMode=passive
 38  *      -XX:-ShenandoahDegeneratedGC
 39  *      -Dtarget=10000
 40  *      TestLotsOfCycles
 41  */
 42 
 43 /*
 44  * @test id=aggressive
 45  * @requires vm.gc.Shenandoah
 46  *
 47  * @run main/othervm/timeout=480 -Xmx16m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
 48  *      -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=aggressive
 49  *      -XX:+ShenandoahOOMDuringEvacALot
 50  *      -Dtarget=1000
 51  *      TestLotsOfCycles
 52  *
 53  * @run main/othervm/timeout=480 -Xmx16m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
 54  *      -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=aggressive
 55  *      -XX:+ShenandoahAllocFailureALot
 56  *      -Dtarget=1000
 57  *      TestLotsOfCycles
 58  *
 59  * @run main/othervm/timeout=480 -Xmx16m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
 60  *      -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=aggressive
 61  *      -Dtarget=1000
 62  *      TestLotsOfCycles
 63  */
 64 
 65 /*
 66  * @test id=adaptive
 67  * @requires vm.gc.Shenandoah
 68  *
 69  * @run main/othervm/timeout=480 -Xmx16m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
 70  *      -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=adaptive
 71  *      -Dtarget=10000
 72  *      TestLotsOfCycles
 73  */
 74 
 75 /*
 76  * @test id=generational
 77  * @requires vm.gc.Shenandoah
 78  *
 79  * @run main/othervm/timeout=480 -Xmx16m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
 80  *      -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=adaptive -XX:ShenandoahGCMode=generational
 81  *      -Dtarget=10000
 82  *      TestLotsOfCycles
 83  */
 84 
 85 /*
 86  * @test id=static
 87  * @requires vm.gc.Shenandoah
 88  *
 89  * @run main/othervm/timeout=480 -Xmx16m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
 90  *      -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=static
 91  *      -Dtarget=10000
 92  *      TestLotsOfCycles
 93  */
 94 
 95 /*
 96  * @test id=compact
 97  * @requires vm.gc.Shenandoah
 98  *
 99  * @run main/othervm/timeout=480 -Xmx16m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
100  *      -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=compact
101  *      -Dtarget=1000
102  *     TestLotsOfCycles
103  */
104 
105 public class TestLotsOfCycles {
106 
107     static final long TARGET_MB = Long.getLong("target", 10_000); // 10 Gb allocation, around 1K cycles to handle
108     static final long STRIDE = 100_000;
109 
110     static volatile Object sink;
111 
112     public static void main(String[] args) throws Exception {
113         long count = TARGET_MB * 1024 * 1024 / 16;
114         for (long c = 0; c < count; c += STRIDE) {
115             for (long s = 0; s < STRIDE; s++) {
116                 sink = new Object();
117             }
118             Thread.sleep(1);
119         }
120     }
121 
122 }