1 /* 2 * Copyright (c) 2014, 2015, 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 TestG1ConcRefinementThreads 26 * @key gc 27 * @bug 8047976 28 * @summary Tests argument processing for G1ConcRefinementThreads 29 * @library /testlibrary 30 * @modules java.base/sun.misc 31 * java.management 32 */ 33 34 import com.oracle.java.testlibrary.*; 35 import java.util.*; 36 import java.util.regex.*; 37 38 public class TestG1ConcRefinementThreads { 39 40 static final int AUTO_SELECT_THREADS_COUNT = 0; 41 static final int PASSED_THREADS_COUNT = 11; 42 43 public static void main(String args[]) throws Exception { 44 // default case 45 runG1ConcRefinementThreadsTest( 46 new String[]{}, // automatically selected 47 AUTO_SELECT_THREADS_COUNT /* use default setting */); 48 49 // zero setting case 50 runG1ConcRefinementThreadsTest( 51 new String[]{"-XX:G1ConcRefinementThreads=0"}, // automatically selected 52 AUTO_SELECT_THREADS_COUNT /* set to zero */); 53 54 // non-zero sestting case 55 runG1ConcRefinementThreadsTest( 56 new String[]{"-XX:G1ConcRefinementThreads="+Integer.toString(PASSED_THREADS_COUNT)}, 57 PASSED_THREADS_COUNT); 58 } 59 60 private static void runG1ConcRefinementThreadsTest(String[] passedOpts, 61 int expectedValue) throws Exception { 62 List<String> vmOpts = new ArrayList<>(); 63 if (passedOpts.length > 0) { 64 Collections.addAll(vmOpts, passedOpts); 65 } 66 Collections.addAll(vmOpts, "-XX:+UseG1GC", "-XX:+PrintFlagsFinal", "-version"); 67 68 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(vmOpts.toArray(new String[vmOpts.size()])); 69 OutputAnalyzer output = new OutputAnalyzer(pb.start()); 70 71 output.shouldHaveExitValue(0); 72 String stdout = output.getStdout(); 73 checkG1ConcRefinementThreadsConsistency(stdout, expectedValue); 74 } 75 76 private static void checkG1ConcRefinementThreadsConsistency(String output, int expectedValue) { 77 int actualValue = getIntValue("G1ConcRefinementThreads", output); 78 79 if (expectedValue == 0) { 80 // If expectedValue is automatically selected, set it same as ParallelGCThreads. 81 expectedValue = getIntValue("ParallelGCThreads", output); 82 } 83 84 if (expectedValue != actualValue) { 85 throw new RuntimeException( 86 "Actual G1ConcRefinementThreads(" + Integer.toString(actualValue) 87 + ") is not equal to expected value(" + Integer.toString(expectedValue) + ")"); 88 } 89 } 90 91 public static int getIntValue(String flag, String where) { 92 Matcher m = Pattern.compile(flag + "\\s+:?=\\s+\\d+").matcher(where); 93 if (!m.find()) { 94 throw new RuntimeException("Could not find value for flag " + flag + " in output string"); 95 } 96 String match = m.group(); 97 return Integer.parseInt(match.substring(match.lastIndexOf(" ") + 1, match.length())); 98 } 99 }