1 /*
   2  * Copyright (c) 2017, 2018, Red Hat, Inc. All rights reserved.
   3  *
   4  * This code is free software; you can redistribute it and/or modify it
   5  * under the terms of the GNU General Public License version 2 only, as
   6  * published by the Free Software Foundation.
   7  *
   8  * This code is distributed in the hope that it will be useful, but WITHOUT
   9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  10  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  11  * version 2 for more details (a copy is included in the LICENSE file that
  12  * accompanied this code).
  13  *
  14  * You should have received a copy of the GNU General Public License version
  15  * 2 along with this work; if not, write to the Free Software Foundation,
  16  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  17  *
  18  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  19  * or visit www.oracle.com if you need additional information or have any
  20  * questions.
  21  *
  22  */
  23 
  24 /**
  25  * @test TestGCThreadGroups
  26  * @summary Test Shenandoah GC uses concurrent/parallel threads correctly
  27  * @key gc
  28  * @requires vm.gc.Shenandoah & !vm.graal.enabled
  29  *
  30  * @run main/othervm -Xmx16m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
  31  *      -XX:+UseShenandoahGC -XX:ShenandoahGCMode=passive
  32  *      -XX:ConcGCThreads=2 -XX:ParallelGCThreads=4
  33  *      -Dtarget=1000
  34  *      TestGCThreadGroups
  35  */
  36 
  37 /**
  38  * @test TestGCThreadGroups
  39  * @summary Test Shenandoah GC uses concurrent/parallel threads correctly
  40  * @key gc
  41  * @requires vm.gc.Shenandoah & !vm.graal.enabled
  42  *
  43  * @run main/othervm -Xmx16m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
  44  *      -XX:+UseShenandoahGC
  45  *      -XX:ConcGCThreads=2 -XX:ParallelGCThreads=4
  46  *      -Dtarget=1000
  47  *      TestGCThreadGroups
  48  *
  49  * @run main/othervm -Xmx16m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
  50  *      -XX:+UseShenandoahGC
  51  *      -XX:-UseDynamicNumberOfGCThreads
  52  *      -Dtarget=1000
  53  *      TestGCThreadGroups
  54  *
  55  * @run main/othervm -Xmx16m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
  56  *      -XX:+UseShenandoahGC
  57  *      -XX:+ForceDynamicNumberOfGCThreads
  58  *      -Dtarget=1000
  59  *      TestGCThreadGroups
  60  *
  61  * @run main/othervm -Xmx16m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
  62  *      -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=adaptive
  63  *      -XX:ConcGCThreads=2 -XX:ParallelGCThreads=4
  64  *      -Dtarget=1000
  65  *      TestGCThreadGroups
  66  *
  67  * @run main/othervm -Xmx16m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
  68  *      -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=static
  69  *      -XX:ConcGCThreads=2 -XX:ParallelGCThreads=4
  70  *      -Dtarget=1000
  71  *      TestGCThreadGroups
  72  *
  73  * @run main/othervm -Xmx16m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
  74  *      -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=compact
  75  *      -XX:ConcGCThreads=2 -XX:ParallelGCThreads=4
  76  *      -Dtarget=100
  77  *      TestGCThreadGroups
  78  *
  79  * @run main/othervm -Xmx16m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
  80  *      -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=aggressive
  81  *      -XX:ConcGCThreads=2 -XX:ParallelGCThreads=4
  82  *      -Dtarget=100
  83  *      TestGCThreadGroups
  84  */
  85 
  86 /**
  87  * @test TestGCThreadGroups
  88  * @summary Test Shenandoah GC uses concurrent/parallel threads correctly
  89  * @key gc
  90  * @requires vm.gc.Shenandoah & !vm.graal.enabled
  91  *
  92  * @run main/othervm -Xmx16m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
  93  *      -XX:+UseShenandoahGC -XX:ShenandoahGCMode=traversal
  94  *      -XX:ConcGCThreads=2 -XX:ParallelGCThreads=4
  95  *      -Dtarget=1000
  96  *      TestGCThreadGroups
  97  *
  98  * @run main/othervm -Xmx16m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
  99  *      -XX:+UseShenandoahGC -XX:ShenandoahGCMode=traversal -XX:ShenandoahGCHeuristics=aggressive
 100  *      -XX:ConcGCThreads=2 -XX:ParallelGCThreads=4
 101  *      -Dtarget=1000
 102  *      TestGCThreadGroups
 103 */
 104 
 105 public class TestGCThreadGroups {
 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 }