aoqi@0: /*
aoqi@0:  * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
aoqi@0:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0:  *
aoqi@0:  * This code is free software; you can redistribute it and/or modify it
aoqi@0:  * under the terms of the GNU General Public License version 2 only, as
aoqi@0:  * published by the Free Software Foundation.
aoqi@0:  *
aoqi@0:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0:  * accompanied this code).
aoqi@0:  *
aoqi@0:  * You should have received a copy of the GNU General Public License version
aoqi@0:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0:  *
aoqi@0:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0:  * or visit www.oracle.com if you need additional information or have any
aoqi@0:  * questions.
aoqi@0:  */
aoqi@0: 
aoqi@0: /*
aoqi@0:  * @test TestSummarizeRSetStatsThreads
aoqi@0:  * @bug 8025441
aoqi@0:  * @summary Ensure that various values of worker threads/concurrent
aoqi@0:  * refinement threads do not crash the VM.
aoqi@0:  * @key gc
aoqi@0:  * @library /testlibrary
aoqi@0:  */
aoqi@0: 
aoqi@0: import java.util.regex.Matcher;
aoqi@0: import java.util.regex.Pattern;
aoqi@0: 
aoqi@0: import com.oracle.java.testlibrary.ProcessTools;
aoqi@0: import com.oracle.java.testlibrary.OutputAnalyzer;
aoqi@0: 
aoqi@0: public class TestSummarizeRSetStatsThreads {
aoqi@0: 
aoqi@0:   private static void runTest(int refinementThreads, int workerThreads) throws Exception {
aoqi@0:     ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-XX:+UseG1GC",
aoqi@0:                                                               "-XX:+UnlockDiagnosticVMOptions",
aoqi@0:                                                               "-XX:+G1SummarizeRSetStats",
aoqi@0:                                                               "-XX:G1ConcRefinementThreads=" + refinementThreads,
aoqi@0:                                                               "-XX:ParallelGCThreads=" + workerThreads,
aoqi@0:                                                               "-version");
aoqi@0: 
aoqi@0:     OutputAnalyzer output = new OutputAnalyzer(pb.start());
aoqi@0: 
aoqi@0:     // check output to contain the string "Concurrent RS threads times (s)" followed by
aoqi@0:     // the correct number of values in the next line.
aoqi@0: 
aoqi@0:     // a zero in refinement thread numbers indicates that the value in ParallelGCThreads should be used.
aoqi@0:     // Additionally use at least one thread.
aoqi@0:     int expectedNumRefinementThreads = refinementThreads == 0 ? workerThreads : refinementThreads;
aoqi@0:     expectedNumRefinementThreads = Math.max(1, expectedNumRefinementThreads);
aoqi@0:     // create the pattern made up of n copies of a floating point number pattern
aoqi@0:     String numberPattern = String.format("%0" + expectedNumRefinementThreads + "d", 0)
aoqi@0:       .replace("0", "\\s+\\d+\\.\\d+");
aoqi@0:     String pattern = "Concurrent RS threads times \\(s\\)$" + numberPattern + "$";
aoqi@0:     Matcher m = Pattern.compile(pattern, Pattern.MULTILINE).matcher(output.getStdout());
aoqi@0: 
aoqi@0:     if (!m.find()) {
aoqi@0:       throw new Exception("Could not find correct output for concurrent RS threads times in stdout," +
aoqi@0:         " should match the pattern \"" + pattern + "\", but stdout is \n" + output.getStdout());
aoqi@0:     }
aoqi@0:     output.shouldHaveExitValue(0);
aoqi@0:   }
aoqi@0: 
aoqi@0:   public static void main(String[] args) throws Exception {
aoqi@0:     if (!TestSummarizeRSetStatsTools.testingG1GC()) {
aoqi@0:       return;
aoqi@0:     }
aoqi@0:     // different valid combinations of number of refinement and gc worker threads
aoqi@0:     runTest(0, 0);
aoqi@0:     runTest(0, 5);
aoqi@0:     runTest(5, 0);
aoqi@0:     runTest(10, 10);
aoqi@0:     runTest(1, 2);
aoqi@0:     runTest(4, 3);
aoqi@0:   }
aoqi@0: }