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.
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   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.
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   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
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  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
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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  */
  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 }