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 -XX:ConcGCThreads=2 -XX:ParallelGCThreads=4 -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -Xmx16m                                         -Dtarget=1000 TestGCThreadGroups
  30  * @run main/othervm -XX:-UseDynamicNumberOfGCThreads            -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -Xmx16m                                         -Dtarget=1000 TestGCThreadGroups
  31  * @run main/othervm -XX:+UnlockDiagnosticVMOptions -XX:+ForceDynamicNumberOfGCThreads          -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -Xmx16m                                         -Dtarget=1000 TestGCThreadGroups
  32  * @run main/othervm -XX:ConcGCThreads=2 -XX:ParallelGCThreads=4 -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -Xmx16m -XX:ShenandoahGCMode=passive            -Dtarget=1000 TestGCThreadGroups
  33  * @run main/othervm -XX:ConcGCThreads=2 -XX:ParallelGCThreads=4 -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -Xmx16m -XX:ShenandoahGCHeuristics=adaptive     -Dtarget=1000 TestGCThreadGroups
  34  * @run main/othervm -XX:ConcGCThreads=2 -XX:ParallelGCThreads=4 -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -Xmx16m -XX:ShenandoahGCHeuristics=static       -Dtarget=1000 TestGCThreadGroups
  35  * @run main/othervm -XX:ConcGCThreads=2 -XX:ParallelGCThreads=4 -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -Xmx16m -XX:ShenandoahGCHeuristics=compact      -Dtarget=100  TestGCThreadGroups
  36  * @run main/othervm -XX:ConcGCThreads=2 -XX:ParallelGCThreads=4 -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -Xmx16m -XX:ShenandoahGCHeuristics=aggressive   -Dtarget=100  TestGCThreadGroups
  37  *
  38  * @run main/othervm -XX:ConcGCThreads=2 -XX:ParallelGCThreads=4 -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -Xmx16m -XX:ShenandoahGCMode=traversal -Dtarget=100  TestGCThreadGroups
  39  * @run main/othervm -XX:ConcGCThreads=2 -XX:ParallelGCThreads=4 -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -Xmx16m -XX:ShenandoahGCMode=traversal -XX:ShenandoahGCHeuristics=aggressive   -Dtarget=100  TestGCThreadGroups
  40 */
  41 
  42 public class TestGCThreadGroups {
  43 
  44     static final long TARGET_MB = Long.getLong("target", 10_000); // 10 Gb allocation, around 1K cycles to handle
  45     static final long STRIDE = 100_000;
  46 
  47     static volatile Object sink;
  48 
  49     public static void main(String[] args) throws Exception {
  50         long count = TARGET_MB * 1024 * 1024 / 16;
  51         for (long c = 0; c < count; c += STRIDE) {
  52             for (long s = 0; s < STRIDE; s++) {
  53                 sink = new Object();
  54             }
  55             Thread.sleep(1);
  56         }
  57     }
  58 
  59 }