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; 57 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(1, 1); 77 runTest(1, 5); 78 runTest(5, 1); 79 runTest(10, 10); 80 runTest(1, 2); 81 runTest(4, 3); 82 } 83 }