90 lines
3.1 KiB
Java
90 lines
3.1 KiB
Java
/*
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* Copyright (c) 2019, 2020, Red Hat, Inc. 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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/*
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* @test
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* @key randomness
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* @library /test/lib
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* @requires vm.bits == 64
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* @modules java.base/jdk.internal.misc
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* java.management
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* @build jdk.test.whitebox.WhiteBox
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* @run driver jdk.test.lib.helpers.ClassFileInstaller jdk.test.whitebox.WhiteBox
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* @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:NativeMemoryTracking=detail HugeArenaTracking
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*/
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import java.util.Random;
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import jdk.test.lib.process.ProcessTools;
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import jdk.test.lib.process.OutputAnalyzer;
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import jdk.test.lib.JDKToolFinder;
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import jdk.test.lib.Utils;
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import jdk.test.whitebox.WhiteBox;
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public class HugeArenaTracking {
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private static final long GB = 1024 * 1024 * 1024;
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public static void main(String args[]) throws Exception {
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OutputAnalyzer output;
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final WhiteBox wb = WhiteBox.getWhiteBox();
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// Grab my own PID
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String pid = Long.toString(ProcessTools.getProcessId());
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ProcessBuilder pb = new ProcessBuilder();
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long arena1 = wb.NMTNewArena(1024);
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long arena2 = wb.NMTNewArena(1024);
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// Run 'jcmd <pid> VM.native_memory summary'
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pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.native_memory", "summary"});
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output = new OutputAnalyzer(pb.start());
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output.shouldContain("Test (reserved=2KB, committed=2KB)");
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Random rand = Utils.getRandomInstance();
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// Allocate 2GB+ from arena
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long total = 0;
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while (total < 2 * GB) {
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// Cap to 10M
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long inc = rand.nextInt(10 * 1024 * 1024);
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wb.NMTArenaMalloc(arena1, inc);
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total += inc;
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}
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ProcessBuilder pb2 = new ProcessBuilder();
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// Run 'jcmd <pid> VM.native_memory summary'
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pb2.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.native_memory", "summary", "scale=GB"});
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output = new OutputAnalyzer(pb2.start());
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output.shouldContain("Test (reserved=2GB, committed=2GB)");
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wb.NMTFreeArena(arena1);
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output = new OutputAnalyzer(pb.start());
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output.shouldContain("Test (reserved=1KB, committed=1KB)");
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wb.NMTFreeArena(arena2);
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output = new OutputAnalyzer(pb.start());
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output.shouldNotContain("Test (reserved");
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}
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}
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