1 /*
   2  * Copyright (c) 2016, 2018, Red Hat, Inc. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 /*
  26  * @test TestThreadCountsOverride
  27  * @summary Test that Shenandoah GC thread counts are overridable
  28  * @requires vm.gc.Shenandoah & !vm.graal.enabled
  29  * @library /test/lib
  30  * @modules java.base/jdk.internal.misc
  31  *          java.management
  32  * @run driver TestThreadCountsOverride
  33  */
  34 
  35 import jdk.test.lib.process.ProcessTools;
  36 import jdk.test.lib.process.OutputAnalyzer;
  37 
  38 public class TestThreadCountsOverride {
  39     public static void main(String[] args) throws Exception {
  40         {
  41             ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
  42                 "-XX:+UnlockDiagnosticVMOptions",
  43                 "-XX:+UnlockExperimentalVMOptions",
  44                 "-XX:+UseShenandoahGC",
  45                 "-XX:ParallelGCThreads=1",
  46                 "-XX:+PrintFlagsFinal",
  47                 "-version");
  48             OutputAnalyzer output = new OutputAnalyzer(pb.start());
  49 
  50             output.shouldMatch("ParallelGCThreads(.*)= 1 ");
  51             output.shouldHaveExitValue(0);
  52         }
  53 
  54         {
  55             ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
  56                 "-XX:+UnlockDiagnosticVMOptions",
  57                 "-XX:+UnlockExperimentalVMOptions",
  58                 "-XX:+UseShenandoahGC",
  59                 "-XX:ConcGCThreads=1",
  60                 "-XX:+PrintFlagsFinal",
  61                 "-version");
  62             OutputAnalyzer output = new OutputAnalyzer(pb.start());
  63 
  64             output.shouldMatch("ConcGCThreads(.*)= 1 ");
  65             output.shouldHaveExitValue(0);
  66         }
  67     }
  68 
  69 }