| /* |
| * Copyright (c) 2014, 2016, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* |
| * @test TestG1ConcRefinementThreads |
| * @key gc |
| * @bug 8047976 |
| * @requires vm.gc=="G1" | vm.gc=="null" |
| * @summary Tests argument processing for G1ConcRefinementThreads |
| * @library /testlibrary |
| * @modules java.base/jdk.internal.misc |
| * java.management |
| */ |
| |
| import jdk.test.lib.*; |
| import java.util.*; |
| import java.util.regex.*; |
| |
| public class TestG1ConcRefinementThreads { |
| |
| static final int AUTO_SELECT_THREADS_COUNT = 0; |
| static final int PASSED_THREADS_COUNT = 11; |
| |
| public static void main(String args[]) throws Exception { |
| // default case |
| runG1ConcRefinementThreadsTest( |
| new String[]{}, // automatically selected |
| AUTO_SELECT_THREADS_COUNT /* use default setting */); |
| |
| // zero setting case |
| runG1ConcRefinementThreadsTest( |
| new String[]{"-XX:G1ConcRefinementThreads=0"}, // automatically selected |
| AUTO_SELECT_THREADS_COUNT /* set to zero */); |
| |
| // non-zero sestting case |
| runG1ConcRefinementThreadsTest( |
| new String[]{"-XX:G1ConcRefinementThreads="+Integer.toString(PASSED_THREADS_COUNT)}, |
| PASSED_THREADS_COUNT); |
| } |
| |
| private static void runG1ConcRefinementThreadsTest(String[] passedOpts, |
| int expectedValue) throws Exception { |
| List<String> vmOpts = new ArrayList<>(); |
| if (passedOpts.length > 0) { |
| Collections.addAll(vmOpts, passedOpts); |
| } |
| Collections.addAll(vmOpts, "-XX:+UseG1GC", "-XX:+PrintFlagsFinal", "-version"); |
| |
| ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(vmOpts.toArray(new String[vmOpts.size()])); |
| OutputAnalyzer output = new OutputAnalyzer(pb.start()); |
| |
| output.shouldHaveExitValue(0); |
| String stdout = output.getStdout(); |
| checkG1ConcRefinementThreadsConsistency(stdout, expectedValue); |
| } |
| |
| private static void checkG1ConcRefinementThreadsConsistency(String output, int expectedValue) { |
| int actualValue = getIntValue("G1ConcRefinementThreads", output); |
| |
| if (expectedValue == 0) { |
| // If expectedValue is automatically selected, set it same as ParallelGCThreads. |
| expectedValue = getIntValue("ParallelGCThreads", output); |
| } |
| |
| if (expectedValue != actualValue) { |
| throw new RuntimeException( |
| "Actual G1ConcRefinementThreads(" + Integer.toString(actualValue) |
| + ") is not equal to expected value(" + Integer.toString(expectedValue) + ")"); |
| } |
| } |
| |
| public static int getIntValue(String flag, String where) { |
| Matcher m = Pattern.compile(flag + "\\s+:?=\\s+\\d+").matcher(where); |
| if (!m.find()) { |
| throw new RuntimeException("Could not find value for flag " + flag + " in output string"); |
| } |
| String match = m.group(); |
| return Integer.parseInt(match.substring(match.lastIndexOf(" ") + 1, match.length())); |
| } |
| } |