93 lines
3.5 KiB
Java
93 lines
3.5 KiB
Java
/*
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* Copyright (c) 2020, 2023, 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 TestMemoryManagerMXBean
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* @requires vm.gc.Z
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* @summary Test ZGC memory manager MXBean
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* @modules java.management
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* @run main/othervm -XX:+UseZGC -Xmx128M gc.z.TestMemoryManagerMXBean
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*/
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import java.lang.management.ManagementFactory;
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public class TestMemoryManagerMXBean {
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private static void checkName(String name) throws Exception {
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if (name == null || name.length() == 0) {
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throw new Exception("Invalid name");
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}
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}
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public static void main(String[] args) throws Exception {
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int zgcCyclesMemoryManagers = 0;
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int zgcPausesMemoryManagers = 0;
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int zgcCyclesMemoryPools = 0;
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int zgcPausesMemoryPools = 0;
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for (final var memoryManager : ManagementFactory.getMemoryManagerMXBeans()) {
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final var memoryManagerName = memoryManager.getName();
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checkName(memoryManagerName);
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System.out.println("MemoryManager: " + memoryManagerName);
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if (memoryManagerName.equals("ZGC Minor Cycles") || memoryManagerName.equals("ZGC Major Cycles")) {
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zgcCyclesMemoryManagers++;
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} else if (memoryManagerName.equals("ZGC Minor Pauses") || memoryManagerName.equals("ZGC Major Pauses")) {
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zgcPausesMemoryManagers++;
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}
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for (final var memoryPoolName : memoryManager.getMemoryPoolNames()) {
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checkName(memoryPoolName);
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System.out.println(" MemoryPool: " + memoryPoolName);
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if (memoryPoolName.equals("ZGC Young Generation") || memoryPoolName.equals("ZGC Old Generation")) {
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if (memoryManagerName.equals("ZGC Minor Cycles") || memoryManagerName.equals("ZGC Major Cycles")) {
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zgcCyclesMemoryPools++;
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} else if (memoryManagerName.equals("ZGC Minor Pauses") || memoryManagerName.equals("ZGC Major Pauses")) {
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zgcPausesMemoryPools++;
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}
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}
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}
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}
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if (zgcCyclesMemoryManagers != 2) {
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throw new Exception("Unexpected number of cycle MemoryManagers");
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}
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if (zgcPausesMemoryManagers != 2) {
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throw new Exception("Unexpected number of pause MemoryManagers");
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}
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if (zgcCyclesMemoryPools != 4) {
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throw new Exception("Unexpected number of cycle MemoryPools");
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}
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if (zgcPausesMemoryPools != 4) {
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throw new Exception("Unexpected number of pause MemoryPools");
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}
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}
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}
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