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 TestThreadCounts

    26  * @summary Test that Shenandoah GC thread counts are handled well

    27  * @key gc

    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 TestThreadCounts

    33  */

    34 

    35 import jdk.test.lib.process.ProcessTools;

    36 import jdk.test.lib.process.OutputAnalyzer;

    37 

    38 public class TestThreadCounts {

    39     public static void main(String[] args) throws Exception {

    40         for (int conc = 0; conc < 16; conc++) {

    41             for (int par = 0; par < 16; par++) {

    42                 testWith(conc, par);

    43             }

    44         }

    45     }

    46 

    47     private static void testWith(int conc, int par) throws Exception {

    48         ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-XX:+UnlockDiagnosticVMOptions",

    49                 "-XX:+UnlockExperimentalVMOptions",

    50                 "-XX:+UseShenandoahGC",

    51                 "-XX:ConcGCThreads=" + conc,

    52                 "-XX:ParallelGCThreads=" + par,

    53                 "-version");

    54         OutputAnalyzer output = new OutputAnalyzer(pb.start());

    55 

    56         if (conc == 0) {

    57             output.shouldContain("Shenandoah expects ConcGCThreads > 0");

    58             output.shouldHaveExitValue(1);

    59         } else if (par == 0) {

    60             output.shouldContain("Shenandoah expects ParallelGCThreads > 0");

    61             output.shouldHaveExitValue(1);

    62         } else if (conc > par) {

    63             output.shouldContain("Shenandoah expects ConcGCThreads <= ParallelGCThreads");

    64             output.shouldHaveExitValue(1);

    65         } else {

    66             output.shouldNotContain("Shenandoah expects ConcGCThreads <= ParallelGCThreads");

    67             output.shouldHaveExitValue(0);

    68         }

    69     }

    70 

    71 }