1 /*

     2  * Copyright (c) 2013, Oracle and/or its affiliates. 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  * @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  */

    32 

    33 import java.util.regex.Matcher;

    34 import java.util.regex.Pattern;

    35 

    36 import com.oracle.java.testlibrary.ProcessTools;

    37 import com.oracle.java.testlibrary.OutputAnalyzer;

    38 

    39 public class TestSummarizeRSetStatsThreads {

    40 

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

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

    43                                                               "-XX:+UnlockDiagnosticVMOptions",

    44                                                               "-XX:+G1SummarizeRSetStats",

    45                                                               "-XX:G1ConcRefinementThreads=" + refinementThreads,

    46                                                               "-XX:ParallelGCThreads=" + workerThreads,

    47                                                               "-version");

    48 

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

    50 

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

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

    53 

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

    55     // Additionally use at least one thread.

    56     int expectedNumRefinementThreads = refinementThreads == 0 ? workerThreads : refinementThreads;

    57     expectedNumRefinementThreads = Math.max(1, expectedNumRefinementThreads);

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

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

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

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

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

    63 

    64     if (!m.find()) {

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

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

    67     }

    68     output.shouldHaveExitValue(0);

    69   }

    70 

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

    72     if (!TestSummarizeRSetStatsTools.testingG1GC()) {

    73       return;

    74     }

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

    76     runTest(0, 0);

    77     runTest(0, 5);

    78     runTest(5, 0);

    79     runTest(10, 10);

    80     runTest(1, 2);

    81     runTest(4, 3);

    82   }

    83 }