91 lines
3.6 KiB
Java
91 lines
3.6 KiB
Java
/*
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* Copyright (c) 2024, 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.z;
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/*
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* @test TestAllocateHeapAtWithHugeTLBFS
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* @requires vm.gc.Z & os.family == "linux"
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* @summary Test ZGC with -XX:AllocateHeapAt and -XX:+UseLargePages
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* @library /test/lib
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* @run driver gc.z.TestAllocateHeapAtWithHugeTLBFS true
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* @run driver gc.z.TestAllocateHeapAtWithHugeTLBFS false
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*/
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import jdk.test.lib.process.ProcessTools;
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import jtreg.SkippedException;
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import java.io.File;
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import java.io.FileNotFoundException;
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import java.nio.file.Files;
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import java.nio.file.Paths;
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import java.nio.file.Path;
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import java.util.regex.Matcher;
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import java.util.regex.Pattern;
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import java.util.Scanner;
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public class TestAllocateHeapAtWithHugeTLBFS {
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static String find_hugetlbfs_mountpoint() {
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Pattern pat = Pattern.compile("\\d+ \\d+ \\d+:\\d+ \\S+ (\\S+) [^-]*- hugetlbfs (.+)");
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try (Scanner scanner = new Scanner(new File("/proc/self/mountinfo"))) {
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while (scanner.hasNextLine()) {
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final Matcher mat = pat.matcher(scanner.nextLine());
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if (mat.matches() && mat.group(2).contains("pagesize=2M")) {
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final Path path = Paths.get(mat.group(1));
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if (Files.isReadable(path) &&
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Files.isWritable(path) &&
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Files.isExecutable(path)) {
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// Found a usable mount point.
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return path.toString();
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}
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}
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}
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} catch (FileNotFoundException e) {
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System.out.println("Could not open /proc/self/mountinfo");
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}
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return null;
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}
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public static void main(String[] args) throws Exception {
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final boolean exists = Boolean.parseBoolean(args[0]);
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final String directory = exists ? find_hugetlbfs_mountpoint()
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: "non-existing-directory";
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if (directory == null) {
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throw new SkippedException("No valid hugetlbfs mount point found");
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}
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final String heapBackingFile = "Heap Backing File: " + directory;
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final String failedToCreateFile = "Failed to create file " + directory;
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ProcessTools.executeTestJava(
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"-XX:+UseZGC",
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"-Xlog:gc*",
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"-Xms32M",
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"-Xmx32M",
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"-XX:+UseLargePages",
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"-XX:AllocateHeapAt=" + directory,
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"-version")
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.shouldContain(exists ? heapBackingFile : failedToCreateFile)
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.shouldNotContain(exists ? failedToCreateFile : heapBackingFile)
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.shouldHaveExitValue(exists ? 0 : 1);
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}
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}
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