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 TestParallelRefprocSanity
  26  * @summary Test that reference processing works with both parallel and non-parallel variants.
  27  * @key gc
  28  *
  29  * @run main/othervm -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -Xmx1g -Xms1g                              TestParallelRefprocSanity
  30  * @run main/othervm -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -Xmx1g -Xms1g  -XX:-ParallelRefProcEnabled TestParallelRefprocSanity
  31  * @run main/othervm -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -Xmx1g -Xms1g  -XX:+ParallelRefProcEnabled TestParallelRefprocSanity
  32  */
  33 
  34 import java.lang.ref.*;
  35 
  36 public class TestParallelRefprocSanity {
  37 
  38     static final long TARGET_MB = Long.getLong("target", 10_000); // 10 Gb allocation
  39 
  40     static volatile Object sink;
  41 
  42     public static void main(String[] args) throws Exception {
  43         long count = TARGET_MB * 1024 * 1024 / 32;
  44         for (long c = 0; c < count; c++) {
  45             sink = new WeakReference<Object>(new Object());
  46         }
  47     }
  48 
  49 }