1 /* 2 * Copyright (c) 2014, 2016, 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 * @requires vm.gc=="G1" | vm.gc=="null" 29 * @summary Tests argument processing for G1ConcRefinementThreads 30 * @library /testlibrary 31 * @modules java.base/sun.misc 32 * java.management 33 */ 34 35 import jdk.test.lib.*; 36 import java.util.*; 37 import java.util.regex.*; 38 39 public class TestG1ConcRefinementThreads { 40 41 static final int AUTO_SELECT_THREADS_COUNT = 0; 42 static final int PASSED_THREADS_COUNT = 11; 43 44 public static void main(String args[]) throws Exception { 45 // default case 46 runG1ConcRefinementThreadsTest( 47 new String[]{}, // automatically selected 48 AUTO_SELECT_THREADS_COUNT /* use default setting */); 49 50 // zero setting case 51 runG1ConcRefinementThreadsTest( 52 new String[]{"-XX:G1ConcRefinementThreads=0"}, // automatically selected 53 AUTO_SELECT_THREADS_COUNT /* set to zero */); 54 55 // non-zero sestting case 56 runG1ConcRefinementThreadsTest( 57 new String[]{"-XX:G1ConcRefinementThreads="+Integer.toString(PASSED_THREADS_COUNT)}, 58 PASSED_THREADS_COUNT); 59 } 60 61 private static void runG1ConcRefinementThreadsTest(String[] passedOpts, 62 int expectedValue) throws Exception { 63 List<String> vmOpts = new ArrayList<>(); 64 if (passedOpts.length > 0) { 65 Collections.addAll(vmOpts, passedOpts); 66 } 67 Collections.addAll(vmOpts, "-XX:+UseG1GC", "-XX:+PrintFlagsFinal", "-version"); 68 69 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(vmOpts.toArray(new String[vmOpts.size()])); 70 OutputAnalyzer output = new OutputAnalyzer(pb.start()); 71 72 output.shouldHaveExitValue(0); 73 String stdout = output.getStdout(); 74 checkG1ConcRefinementThreadsConsistency(stdout, expectedValue); 75 } 76 77 private static void checkG1ConcRefinementThreadsConsistency(String output, int expectedValue) { 78 int actualValue = getIntValue("G1ConcRefinementThreads", output); 79 80 if (expectedValue == 0) { 81 // If expectedValue is automatically selected, set it same as ParallelGCThreads. 82 expectedValue = getIntValue("ParallelGCThreads", output); 83 } 84 85 if (expectedValue != actualValue) { 86 throw new RuntimeException( 87 "Actual G1ConcRefinementThreads(" + Integer.toString(actualValue) 88 + ") is not equal to expected value(" + Integer.toString(expectedValue) + ")"); 89 } 90 } 91 92 public static int getIntValue(String flag, String where) { 93 Matcher m = Pattern.compile(flag + "\\s+:?=\\s+\\d+").matcher(where); 94 if (!m.find()) { 95 throw new RuntimeException("Could not find value for flag " + flag + " in output string"); 96 } 97 String match = m.group(); 98 return Integer.parseInt(match.substring(match.lastIndexOf(" ") + 1, match.length())); 99 } 100 }