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79 lines
3.2 KiB
79 lines
3.2 KiB
/* |
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* Copyright (c) 2015, 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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/* |
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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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* @requires vm.gc=="null" |
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* @key gc |
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* @library /testlibrary |
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*/ |
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import com.oracle.java.testlibrary.ProcessTools; |
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import com.oracle.java.testlibrary.OutputAnalyzer; |
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public class TestDynamicNumberOfGCThreads { |
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public static void main(String[] args) throws Exception { |
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testDynamicNumberOfGCThreads("UseConcMarkSweepGC"); |
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testDynamicNumberOfGCThreads("UseG1GC"); |
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testDynamicNumberOfGCThreads("UseParallelGC"); |
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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 and TraceDynamicGCThreads enabled |
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String[] baseArgs = {"-XX:+" + gcFlag, "-Xmx10M", "-XX:+PrintGCDetails", "-XX:+UseDynamicNumberOfGCThreads", "-XX:+TraceDynamicGCThreads", GCTest.class.getName()}; |
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// Base test with gc and +UseDynamicNumberOfGCThreads: |
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ProcessBuilder pb_enabled = ProcessTools.createJavaProcessBuilder(baseArgs); |
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verifyDynamicNumberOfGCThreads(new OutputAnalyzer(pb_enabled.start())); |
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// Ensure it also works on uniprocessors or if user specifies -XX:ParallelGCThreads=1: |
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String[] extraArgs = {"-XX:+UnlockDiagnosticVMOptions", "-XX:+ForceDynamicNumberOfGCThreads", "-XX:ParallelGCThreads=1"}; |
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String[] finalArgs = new String[baseArgs.length + extraArgs.length]; |
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System.arraycopy(extraArgs, 0, finalArgs, 0, extraArgs.length); |
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System.arraycopy(baseArgs, 0, finalArgs, extraArgs.length, baseArgs.length); |
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pb_enabled = ProcessTools.createJavaProcessBuilder(finalArgs); |
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verifyDynamicNumberOfGCThreads(new OutputAnalyzer(pb_enabled.start())); |
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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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