77 lines
2.8 KiB
Java
77 lines
2.8 KiB
Java
/*
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* Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
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* Copyright (c) 2023, Red Hat Inc.
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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
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* @summary Test that the JVM detects the OS hugepage/THP settings correctly.
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* @library /test/lib
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* @requires vm.flagless
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* @requires os.family == "linux"
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* @modules java.base/jdk.internal.misc
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* java.management
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* @run driver TestHugePageDetection
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*/
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import java.util.*;
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import jdk.test.lib.process.OutputAnalyzer;
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import jdk.test.lib.process.ProcessTools;
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public class TestHugePageDetection {
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public static void main(String[] args) throws Exception {
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ArrayList<String> finalargs = new ArrayList<String>();
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String[] defaultArgs = {
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"-Xlog:pagesize", "-Xmx64M", "-XX:-CreateCoredumpOnCrash"
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};
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finalargs.addAll(Arrays.asList(defaultArgs));
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finalargs.add("-version");
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ProcessBuilder pb = ProcessTools.createLimitedTestJavaProcessBuilder(
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new String[] {"-Xlog:pagesize", "-Xmx64M", "-version"});
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OutputAnalyzer output = new OutputAnalyzer(pb.start());
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output.reportDiagnosticSummary();
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output.shouldHaveExitValue(0);
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// The configuration detected by the JVM should match the OS settings
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HugePageConfiguration configurationFromOS = HugePageConfiguration.readFromOS();
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System.out.println("Configuration read from OS: " + configurationFromOS);
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HugePageConfiguration configurationFromLog = HugePageConfiguration.readFromJVMLog(output);
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System.out.println("Configuration read from JVM log: " + configurationFromLog);
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if (configurationFromOS.equals(configurationFromLog)) {
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System.out.println("Okay");
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} else {
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throw new RuntimeException("Configurations differ");
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}
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// If we want to run
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}
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}
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