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 29 * @summary Tests argument processing for G1ConcRefinementThreads 30 * @library /test/lib 31 * @modules java.base/jdk.internal.misc 32 * java.management 33 */ 34 35 import jdk.test.lib.process.OutputAnalyzer; 36 import jdk.test.lib.process.ProcessTools; 37 import java.util.*; 38 import java.util.regex.*; 39 40 public class TestG1ConcRefinementThreads { 41 42 static final int AUTO_SELECT_THREADS_COUNT = -1; 43 static final int PASSED_THREADS_COUNT = 11; 44 45 public static void main(String args[]) throws Exception { 46 // default case 47 runG1ConcRefinementThreadsTest( 48 new String[]{}, // automatically selected 49 AUTO_SELECT_THREADS_COUNT /* use default setting */); 50 51 // zero setting case 52 runG1ConcRefinementThreadsTest( 53 new String[]{"-XX:G1ConcRefinementThreads=0"}, 54 0); 55 56 // non-zero sestting case 57 runG1ConcRefinementThreadsTest( 58 new String[]{"-XX:G1ConcRefinementThreads="+Integer.toString(PASSED_THREADS_COUNT)}, 59 PASSED_THREADS_COUNT); 60 } 61 62 private static void runG1ConcRefinementThreadsTest(String[] passedOpts, 63 int expectedValue) throws Exception { 64 List<String> vmOpts = new ArrayList<>(); 65 if (passedOpts.length > 0) { 66 Collections.addAll(vmOpts, passedOpts); 67 } 68 Collections.addAll(vmOpts, "-XX:+UseG1GC", "-XX:+PrintFlagsFinal", "-version"); 69 70 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(vmOpts.toArray(new String[vmOpts.size()])); 71 OutputAnalyzer output = new OutputAnalyzer(pb.start()); 72 73 output.shouldHaveExitValue(0); 74 String stdout = output.getStdout(); 75 checkG1ConcRefinementThreadsConsistency(stdout, expectedValue); 76 } 77 78 private static void checkG1ConcRefinementThreadsConsistency(String output, int expectedValue) { 79 int actualValue = getIntValue("G1ConcRefinementThreads", output); 80 81 if (expectedValue == AUTO_SELECT_THREADS_COUNT) { 82 // If expectedValue is automatically selected, set it same as ParallelGCThreads. 83 expectedValue = getIntValue("ParallelGCThreads", output); 84 } 85 86 if (expectedValue != actualValue) { 87 throw new RuntimeException( 88 "Actual G1ConcRefinementThreads(" + Integer.toString(actualValue) 89 + ") is not equal to expected value(" + Integer.toString(expectedValue) + ")"); 90 } 91 } 92 93 public static int getIntValue(String flag, String where) { 94 Matcher m = Pattern.compile(flag + "\\s+:?=\\s+\\d+").matcher(where); 95 if (!m.find()) { 96 throw new RuntimeException("Could not find value for flag " + flag + " in output string"); 97 } 98 String match = m.group(); 99 return Integer.parseInt(match.substring(match.lastIndexOf(" ") + 1, match.length())); 100 } 101 }