1 /*

     2  * Copyright (c) 2013, 2015, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

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     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

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    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).

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    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

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    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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    23 

    24 /*

    25  * @test TestSummarizeRSetStatsThreads

    26  * @bug 8025441

    27  * @summary Ensure that various values of worker threads/concurrent

    28  * refinement threads do not crash the VM.

    29  * @key gc

    30  * @library /testlibrary

    31  * @modules java.base/sun.misc

    32  *          java.management/sun.management

    33  */

    34 

    35 import java.util.regex.Matcher;

    36 import java.util.regex.Pattern;

    37 

    38 import jdk.test.lib.ProcessTools;

    39 import jdk.test.lib.OutputAnalyzer;

    40 

    41 public class TestSummarizeRSetStatsThreads {

    42 

    43   private static void runTest(int refinementThreads, int workerThreads) throws Exception {

    44     ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-XX:+UseG1GC",

    45                                                               "-XX:+UnlockDiagnosticVMOptions",

    46                                                               "-XX:+G1SummarizeRSetStats",

    47                                                               "-XX:G1ConcRefinementThreads=" + refinementThreads,

    48                                                               "-XX:ParallelGCThreads=" + workerThreads,

    49                                                               "-version");

    50 

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

    52 

    53     // check output to contain the string "Concurrent RS threads times (s)" followed by

    54     // the correct number of values in the next line.

    55 

    56     // a zero in refinement thread numbers indicates that the value in ParallelGCThreads should be used.

    57     // Additionally use at least one thread.

    58     int expectedNumRefinementThreads = refinementThreads;

    59 

    60     // create the pattern made up of n copies of a floating point number pattern

    61     String numberPattern = String.format("%0" + expectedNumRefinementThreads + "d", 0)

    62       .replace("0", "\\s+\\d+\\.\\d+");

    63     String pattern = "Concurrent RS threads times \\(s\\)$" + numberPattern + "$";

    64     Matcher m = Pattern.compile(pattern, Pattern.MULTILINE).matcher(output.getStdout());

    65 

    66     if (!m.find()) {

    67       throw new Exception("Could not find correct output for concurrent RS threads times in stdout," +

    68         " should match the pattern \"" + pattern + "\", but stdout is \n" + output.getStdout());

    69     }

    70     output.shouldHaveExitValue(0);

    71   }

    72 

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

    74     if (!TestSummarizeRSetStatsTools.testingG1GC()) {

    75       return;

    76     }

    77     // different valid combinations of number of refinement and gc worker threads

    78     runTest(1, 1);

    79     runTest(1, 5);

    80     runTest(5, 1);

    81     runTest(10, 10);

    82     runTest(1, 2);

    83     runTest(4, 3);

    84   }

    85 }