95 lines
3.6 KiB
Java
95 lines
3.6 KiB
Java
/*
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* Copyright (c) 2015, 2023, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package gc.ergonomics;
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/*
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* @test TestDynamicNumberOfGCThreads
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* @bug 8017462
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* @summary Ensure that UseDynamicNumberOfGCThreads runs
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* @modules java.base/jdk.internal.misc
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* @library /test/lib
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* @build jdk.test.whitebox.WhiteBox
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* @run driver jdk.test.lib.helpers.ClassFileInstaller jdk.test.whitebox.WhiteBox
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* @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI gc.ergonomics.TestDynamicNumberOfGCThreads
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*/
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import jdk.test.lib.process.OutputAnalyzer;
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import jdk.test.lib.process.ProcessTools;
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import jtreg.SkippedException;
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import jdk.test.whitebox.gc.GC;
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public class TestDynamicNumberOfGCThreads {
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public static void main(String[] args) throws Exception {
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boolean noneGCSupported = true;
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if (GC.G1.isSupported()) {
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noneGCSupported = false;
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testDynamicNumberOfGCThreads("UseG1GC");
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}
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if (GC.Parallel.isSupported()) {
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noneGCSupported = false;
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testDynamicNumberOfGCThreads("UseParallelGC");
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}
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if (noneGCSupported) {
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throw new SkippedException("Skipping test because none of G1/Parallel is supported.");
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}
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}
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private static void verifyDynamicNumberOfGCThreads(OutputAnalyzer output) {
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output.shouldHaveExitValue(0); // test should run succesfully
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output.shouldContain("new_active_workers");
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}
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private static void testDynamicNumberOfGCThreads(String gcFlag) throws Exception {
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// UseDynamicNumberOfGCThreads enabled
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String[] baseArgs = {"-XX:+UnlockExperimentalVMOptions", "-XX:+" + gcFlag, "-Xmx10M", "-XX:+UseDynamicNumberOfGCThreads", "-Xlog:gc+task=trace", GCTest.class.getName()};
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// Base test with gc and +UseDynamicNumberOfGCThreads:
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OutputAnalyzer output = ProcessTools.executeLimitedTestJava(baseArgs);
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verifyDynamicNumberOfGCThreads(output);
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// Turn on parallel reference processing
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String[] parRefProcArg = {"-XX:+ParallelRefProcEnabled", "-XX:-ShowMessageBoxOnError"};
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String[] parRefArgs = new String[baseArgs.length + parRefProcArg.length];
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System.arraycopy(parRefProcArg, 0, parRefArgs, 0, parRefProcArg.length);
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System.arraycopy(baseArgs, 0, parRefArgs, parRefProcArg.length, baseArgs.length);
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output = ProcessTools.executeLimitedTestJava(parRefArgs);
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verifyDynamicNumberOfGCThreads(output);
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}
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static class GCTest {
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private static byte[] garbage;
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public static void main(String [] args) {
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System.out.println("Creating garbage");
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// create 128MB of garbage. This should result in at least one GC
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for (int i = 0; i < 1024; i++) {
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garbage = new byte[128 * 1024];
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}
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System.out.println("Done");
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}
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}
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}
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