1 /*
   2  * Copyright (c) 2017, Red Hat, Inc. and/or its affiliates.
   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 LotsOfCycles
  26  *
  27  * @run main/othervm/timeout=480 -XX:+UseShenandoahGC -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -Xmx16m -XX:ShenandoahGCHeuristics=passive      -Dtarget=10000 -XX:+ShenandoahDegeneratedGC     LotsOfCycles
  28  * @run main/othervm/timeout=480 -XX:+UseShenandoahGC -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -Xmx16m -XX:ShenandoahGCHeuristics=passive      -Dtarget=10000 -XX:-ShenandoahDegeneratedGC     LotsOfCycles
  29  *
  30  * @run main/othervm/timeout=480 -XX:+UseShenandoahGC -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -Xmx16m -XX:ShenandoahGCHeuristics=aggressive   -Dtarget=1000  -XX:+ShenandoahOOMDuringEvacALot LotsOfCycles
  31  * @run main/othervm/timeout=480 -XX:+UseShenandoahGC -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -Xmx16m -XX:ShenandoahGCHeuristics=aggressive   -Dtarget=1000  -XX:+ShenandoahAllocFailureALot  LotsOfCycles
  32  * @run main/othervm/timeout=480 -XX:+UseShenandoahGC -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -Xmx16m -XX:ShenandoahGCHeuristics=aggressive   -Dtarget=1000                                   LotsOfCycles
  33  *
  34  * @run main/othervm/timeout=480 -XX:+UseShenandoahGC -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -Xmx16m -XX:ShenandoahGCHeuristics=adaptive     -Dtarget=10000 LotsOfCycles
  35  * @run main/othervm/timeout=480 -XX:+UseShenandoahGC -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -Xmx16m -XX:ShenandoahGCHeuristics=static       -Dtarget=10000 LotsOfCycles
  36  * @run main/othervm/timeout=480 -XX:+UseShenandoahGC -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -Xmx16m -XX:ShenandoahGCHeuristics=compact      -Dtarget=1000  LotsOfCycles
  37  */
  38 
  39 public class LotsOfCycles {
  40 
  41   static final long TARGET_MB = Long.getLong("target", 10_000); // 10 Gb allocation, around 1K cycles to handle
  42   static final long STRIDE = 100_000;
  43 
  44   static volatile Object sink;
  45 
  46   public static void main(String[] args) throws Exception {
  47     long count = TARGET_MB * 1024 * 1024 / 16;
  48     for (long c = 0; c < count; c += STRIDE) {
  49       for (long s = 0; s < STRIDE; s++) {
  50         sink = new Object();
  51       }
  52       Thread.sleep(1);
  53     }
  54   }
  55 
  56 }