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8289137: Automatically adapt Young/OldPLABSize and when setting only …
…MinTLABSize Reviewed-by: iwalulya, sangheki
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Thomas Schatzl
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Jul 27, 2022
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/* | ||
* Copyright (c) 2022, 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. | ||
*/ | ||
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package gc; | ||
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/* | ||
* @test TestPLABAdaptToMinTLABSize | ||
* @bug 8289137 | ||
* @summary Make sure that Young/OldPLABSize adapt to MinTLABSize setting. | ||
* @library /test/lib | ||
* @modules java.base/jdk.internal.misc | ||
* java.management | ||
* @run driver gc.TestPLABAdaptToMinTLABSize | ||
*/ | ||
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import java.util.ArrayList; | ||
import java.util.Collections; | ||
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import jdk.test.lib.process.OutputAnalyzer; | ||
import jdk.test.lib.process.ProcessTools; | ||
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public class TestPLABAdaptToMinTLABSize { | ||
private static void runTest(boolean shouldSucceed, String... extraArgs) throws Exception { | ||
ArrayList<String> testArguments = new ArrayList<String>(); | ||
testArguments.add("-Xmx12m"); | ||
testArguments.add("-XX:+PrintFlagsFinal"); | ||
Collections.addAll(testArguments, extraArgs); | ||
testArguments.add("-version"); | ||
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ProcessBuilder pb = ProcessTools.createTestJvm(testArguments); | ||
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OutputAnalyzer output = new OutputAnalyzer(pb.start()); | ||
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System.out.println(output.getStderr()); | ||
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if (shouldSucceed) { | ||
output.shouldHaveExitValue(0); | ||
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long oldPLABSize = Long.parseLong(output.firstMatch("OldPLABSize\\s+=\\s(\\d+)",1)); | ||
long youngPLABSize = Long.parseLong(output.firstMatch("YoungPLABSize\\s+=\\s(\\d+)",1)); | ||
long minTLABSize = Long.parseLong(output.firstMatch("MinTLABSize\\s+=\\s(\\d+)",1)); | ||
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System.out.println("OldPLABSize=" + oldPLABSize + " YoungPLABSize=" + youngPLABSize + | ||
"MinTLABSize=" + minTLABSize); | ||
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} else { | ||
output.shouldNotHaveExitValue(0); | ||
} | ||
} | ||
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public static void main(String[] args) throws Exception { | ||
runTest(true, "-XX:MinTLABSize=100k"); | ||
// Should not succeed when explicitly specifying invalid combination. | ||
runTest(false, "-XX:MinTLABSize=100k", "-XX:OldPLABSize=5k"); | ||
runTest(false, "-XX:MinTLABSize=100k", "-XX:YoungPLABSize=5k"); | ||
} | ||
} |
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