1 /* 2 * Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 /** 25 * @test TestMemoryMXBean 26 * @requires vm.gc.Z & !vm.graal.enabled 27 * @summary Test ZGC heap memory MXBean 28 * @modules java.management 29 * @run main/othervm -XX:+UseZGC -Xms128M -Xmx256M -Xlog:gc* TestMemoryMXBean 128 256 30 * @run main/othervm -XX:+UseZGC -Xms256M -Xmx256M -Xlog:gc* TestMemoryMXBean 256 256 31 */ 32 33 import java.lang.management.ManagementFactory; 34 35 public class TestMemoryMXBean { 36 public static void main(String[] args) throws Exception { 37 final long M = 1024 * 1024; 38 final long expectedInitialCapacity = Long.parseLong(args[0]) * M; 39 final long expectedMaxCapacity = Long.parseLong(args[1]) * M; 40 final var memoryUsage = ManagementFactory.getMemoryMXBean().getHeapMemoryUsage(); 41 final long initialCapacity = memoryUsage.getInit(); 42 final long capacity = memoryUsage.getCommitted(); 43 final long maxCapacity = memoryUsage.getMax(); 44 45 System.out.println("expectedInitialCapacity: " + expectedInitialCapacity); 46 System.out.println(" expectedMaxCapacity: " + expectedMaxCapacity); 47 System.out.println(" initialCapacity: " + initialCapacity); 48 System.out.println(" capacity: " + capacity); 49 System.out.println(" maxCapacity: " + maxCapacity); 50 51 if (initialCapacity != expectedInitialCapacity) { 52 throw new Exception("Unexpected initial capacity"); 53 } 54 55 if (maxCapacity != expectedMaxCapacity) { 56 throw new Exception("Unexpected max capacity"); 57 } 58 59 if (capacity < initialCapacity || capacity > maxCapacity) { 60 throw new Exception("Unexpected capacity"); 61 } 62 } 63 }