1 /*
   2  * Copyright (c) 2016, 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 TestThreadCountsOverride
  26  * @summary Test that Shenandoah GC thread counts are overridable
  27  * @key gc
  28  * @library /testlibrary
  29  * @run driver TestThreadCountsOverride
  30  */
  31 
  32 import com.oracle.java.testlibrary.*;
  33 
  34 public class TestThreadCountsOverride {
  35     public static void main(String[] args) throws Exception {
  36         {
  37             ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
  38                 "-XX:+UnlockDiagnosticVMOptions",
  39                 "-XX:+UnlockExperimentalVMOptions",
  40                 "-XX:+UseShenandoahGC",
  41                 "-XX:ParallelGCThreads=1",
  42                 "-XX:+PrintFlagsFinal",
  43                 "-version");
  44             OutputAnalyzer output = new OutputAnalyzer(pb.start());
  45 
  46             output.shouldMatch("ParallelGCThreads(.*)= 1 ");
  47             output.shouldHaveExitValue(0);
  48         }
  49 
  50         {
  51             ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
  52                 "-XX:+UnlockDiagnosticVMOptions",
  53                 "-XX:+UnlockExperimentalVMOptions",
  54                 "-XX:+UseShenandoahGC",
  55                 "-XX:ConcGCThreads=1",
  56                 "-XX:+PrintFlagsFinal",
  57                 "-version");
  58             OutputAnalyzer output = new OutputAnalyzer(pb.start());
  59 
  60             output.shouldMatch("ConcGCThreads(.*)= 1 ");
  61             output.shouldHaveExitValue(0);
  62         }
  63     }
  64 
  65 }