58 lines
2.1 KiB
Java
58 lines
2.1 KiB
Java
/*
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* Copyright (c) 2023, Red Hat, Inc.
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*
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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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import java.io.File;
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import java.io.FileOutputStream;
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import jdk.test.whitebox.WhiteBox;
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// Check dynamic limits updating. HotSpot side.
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public class LimitUpdateChecker {
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private static final File UPDATE_FILE = new File("/tmp", "limitsUpdated");
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private static final File STARTED_FILE = new File("/tmp", "started");
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public static void main(String[] args) throws Exception {
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System.out.println("LimitUpdateChecker: Entering");
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WhiteBox wb = WhiteBox.getWhiteBox();
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printMetrics(wb); // print initial limits
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createStartedFile();
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while (!UPDATE_FILE.exists()) {
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Thread.sleep(200);
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}
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System.out.println("'limitsUpdated' file appeared. Stopped loop.");
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printMetrics(wb); // print limits after update
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System.out.println("LimitUpdateChecker DONE.");
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}
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private static void printMetrics(WhiteBox wb) {
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wb.printOsInfo();
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}
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private static void createStartedFile() throws Exception {
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FileOutputStream fout = new FileOutputStream(STARTED_FILE);
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fout.close();
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}
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}
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