author | epavlova |
Thu, 14 Jun 2018 00:07:10 -0700 | |
changeset 50559 | 27929b7eae4b |
parent 50523 | 7b7c75d87f9b |
child 51443 | cdffba164671 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2017, 2018, Red Hat, Inc. All rights reserved. |
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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 TestMemoryMXBeans |
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* @key gc |
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* @requires vm.gc.Epsilon & !vm.graal.enabled |
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* @summary Test JMX memory beans |
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* @modules java.base/jdk.internal.misc |
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* java.management |
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* @run main/othervm -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC -Xmx1g TestMemoryMXBeans -1 1024 |
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* @run main/othervm -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC -Xms1g -Xmx1g TestMemoryMXBeans 1024 1024 |
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* @run main/othervm -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC -Xms128m -Xmx1g TestMemoryMXBeans 128 1024 |
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*/ |
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import java.lang.management.*; |
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import java.util.*; |
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public class TestMemoryMXBeans { |
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static volatile Object sink; |
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public static void main(String[] args) throws Exception { |
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if (args.length < 2) { |
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throw new IllegalStateException("Should provide expected heap sizes"); |
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} |
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long initSize = 1L * Integer.parseInt(args[0]) * 1024 * 1024; |
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long maxSize = 1L * Integer.parseInt(args[1]) * 1024 * 1024; |
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testMemoryBean(initSize, maxSize); |
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testAllocs(); |
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} |
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public static void testMemoryBean(long initSize, long maxSize) { |
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MemoryMXBean memoryMXBean = ManagementFactory.getMemoryMXBean(); |
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long heapInit = memoryMXBean.getHeapMemoryUsage().getInit(); |
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long heapMax = memoryMXBean.getHeapMemoryUsage().getMax(); |
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long nonHeapInit = memoryMXBean.getNonHeapMemoryUsage().getInit(); |
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long nonHeapMax = memoryMXBean.getNonHeapMemoryUsage().getMax(); |
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if (initSize > 0 && heapInit != initSize) { |
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throw new IllegalStateException("Init heap size is wrong: " + heapInit + " vs " + initSize); |
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} |
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if (maxSize > 0 && heapMax != maxSize) { |
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throw new IllegalStateException("Max heap size is wrong: " + heapMax + " vs " + maxSize); |
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} |
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} |
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public static void testAllocs() { |
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MemoryMXBean memoryMXBean = ManagementFactory.getMemoryMXBean(); |
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// Do lazy inits first: |
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long heapUsed1 = memoryMXBean.getHeapMemoryUsage().getUsed(); |
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sink = new int[1024*1024]; |
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long heapUsed2 = memoryMXBean.getHeapMemoryUsage().getUsed(); |
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// Compute how much we waste during the calls themselves: |
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heapUsed1 = memoryMXBean.getHeapMemoryUsage().getUsed(); |
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heapUsed2 = memoryMXBean.getHeapMemoryUsage().getUsed(); |
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long adj = heapUsed2 - heapUsed1; |
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heapUsed1 = memoryMXBean.getHeapMemoryUsage().getUsed(); |
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sink = new int[1024*1024]; |
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heapUsed2 = memoryMXBean.getHeapMemoryUsage().getUsed(); |
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long diff = heapUsed2 - heapUsed1 - adj; |
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long min = 8 + 4*1024*1024; |
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long max = 16 + 4*1024*1024; |
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if (!(min <= diff && diff <= max)) { |
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throw new IllegalStateException("Allocation did not change used space right: " + diff + " should be in [" + min + ", " + max + "]"); |
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} |
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} |
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} |