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  *
  29  * @run main/othervm -Xmx16m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
  30  *      -XX:+UseShenandoahGC -XX:ShenandoahGCMode=passive
  31  *      -XX:ConcGCThreads=2 -XX:ParallelGCThreads=4
  32  *      -Dtarget=1000
  33  *      TestGCThreadGroups
  34  */
  35 
  36 /**
  37  * @test TestGCThreadGroups
  38  * @summary Test Shenandoah GC uses concurrent/parallel threads correctly
  39  * @key gc
  40  *
  41  * @run main/othervm -Xmx16m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
  42  *      -XX:+UseShenandoahGC
  43  *      -XX:ConcGCThreads=2 -XX:ParallelGCThreads=4
  44  *      -Dtarget=1000
  45  *      TestGCThreadGroups
  46  *
  47  * @run main/othervm -Xmx16m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
  48  *      -XX:+UseShenandoahGC
  49  *      -XX:-UseDynamicNumberOfGCThreads
  50  *      -Dtarget=1000
  51  *      TestGCThreadGroups
  52  *
  53  * @run main/othervm -Xmx16m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
  54  *      -XX:+UseShenandoahGC
  55  *      -XX:+ForceDynamicNumberOfGCThreads
  56  *      -Dtarget=1000
  57  *      TestGCThreadGroups
  58  *
  59  * @run main/othervm -Xmx16m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
  60  *      -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=adaptive
  61  *      -XX:ConcGCThreads=2 -XX:ParallelGCThreads=4
  62  *      -Dtarget=1000
  63  *      TestGCThreadGroups
  64  *
  65  * @run main/othervm -Xmx16m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
  66  *      -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=static
  67  *      -XX:ConcGCThreads=2 -XX:ParallelGCThreads=4
  68  *      -Dtarget=1000
  69  *      TestGCThreadGroups
  70  *
  71  * @run main/othervm -Xmx16m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
  72  *      -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=compact
  73  *      -XX:ConcGCThreads=2 -XX:ParallelGCThreads=4
  74  *      -Dtarget=100
  75  *      TestGCThreadGroups
  76  *
  77  * @run main/othervm -Xmx16m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
  78  *      -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=aggressive
  79  *      -XX:ConcGCThreads=2 -XX:ParallelGCThreads=4
  80  *      -Dtarget=100
  81  *      TestGCThreadGroups
  82  */
  83 
  84 /**
  85  * @test TestGCThreadGroups
  86  * @summary Test Shenandoah GC uses concurrent/parallel threads correctly
  87  * @key gc
  88  *
  89  * @run main/othervm -Xmx16m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
  90  *      -XX:+UseShenandoahGC -XX:ShenandoahGCMode=iu
  91  *      -XX:ConcGCThreads=2 -XX:ParallelGCThreads=4
  92  *      -Dtarget=1000
  93  *      TestGCThreadGroups
  94  *
  95  * @run main/othervm -Xmx16m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
  96  *      -XX:+UseShenandoahGC -XX:ShenandoahGCMode=iu -XX:ShenandoahGCHeuristics=aggressive
  97  *      -XX:ConcGCThreads=2 -XX:ParallelGCThreads=4
  98  *      -Dtarget=1000
  99  *      TestGCThreadGroups
 100 */
 101 
 102 public class TestGCThreadGroups {
 103 
 104     static final long TARGET_MB = Long.getLong("target", 10_000); // 10 Gb allocation, around 1K cycles to handle
 105     static final long STRIDE = 100_000;
 106 
 107     static volatile Object sink;
 108 
 109     public static void main(String[] args) throws Exception {
 110         long count = TARGET_MB * 1024 * 1024 / 16;
 111         for (long c = 0; c < count; c += STRIDE) {
 112             for (long s = 0; s < STRIDE; s++) {
 113                 sink = new Object();
 114             }
 115             Thread.sleep(1);
 116         }
 117     }
 118 
 119 }