66 lines
2.7 KiB
Java
66 lines
2.7 KiB
Java
/*
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* Copyright (c) 2020, 2022, 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.x;
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/**
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* @test TestMemoryMXBean
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* @requires vm.gc.ZSinglegen
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* @summary Test ZGC heap memory MXBean
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* @modules java.management
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* @run main/othervm -XX:+UseZGC -XX:-ZGenerational -Xms128M -Xmx256M -Xlog:gc* gc.x.TestMemoryMXBean 128 256
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* @run main/othervm -XX:+UseZGC -XX:-ZGenerational -Xms256M -Xmx256M -Xlog:gc* gc.x.TestMemoryMXBean 256 256
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*/
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import java.lang.management.ManagementFactory;
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public class TestMemoryMXBean {
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public static void main(String[] args) throws Exception {
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final long M = 1024 * 1024;
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final long expectedInitialCapacity = Long.parseLong(args[0]) * M;
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final long expectedMaxCapacity = Long.parseLong(args[1]) * M;
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final var memoryUsage = ManagementFactory.getMemoryMXBean().getHeapMemoryUsage();
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final long initialCapacity = memoryUsage.getInit();
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final long capacity = memoryUsage.getCommitted();
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final long maxCapacity = memoryUsage.getMax();
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System.out.println("expectedInitialCapacity: " + expectedInitialCapacity);
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System.out.println(" expectedMaxCapacity: " + expectedMaxCapacity);
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System.out.println(" initialCapacity: " + initialCapacity);
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System.out.println(" capacity: " + capacity);
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System.out.println(" maxCapacity: " + maxCapacity);
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if (initialCapacity != expectedInitialCapacity) {
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throw new Exception("Unexpected initial capacity");
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}
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if (maxCapacity != expectedMaxCapacity) {
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throw new Exception("Unexpected max capacity");
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}
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if (capacity < initialCapacity || capacity > maxCapacity) {
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throw new Exception("Unexpected capacity");
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}
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}
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}
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