author | pliden |
Tue, 12 Jun 2018 17:40:28 +0200 | |
changeset 50525 | 767cdb97f103 |
parent 50408 | a5fc0fb1d31d |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2003, 2016, 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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/* |
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* @test |
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* @bug 4530538 |
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* @summary Basic unit test of MemoryMXBean.getMemoryPools() and |
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* MemoryMXBean.getMemoryManager(). |
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8204210: Implementation: JEP 333: ZGC: A Scalable Low-Latency Garbage Collector (Experimental)
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* @requires vm.gc != "Z" |
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* @author Mandy Chung |
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* |
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* @modules jdk.management |
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* @run main MemoryTest 2 3 |
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*/ |
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/* |
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* NOTE: This expected result is hardcoded in this test and this test |
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* will be affected if the heap memory layout is changed in |
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* the future implementation. |
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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 MemoryTest { |
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private static boolean testFailed = false; |
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private static MemoryMXBean mm = ManagementFactory.getMemoryMXBean(); |
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private static final int HEAP = 0; |
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private static final int NONHEAP = 1; |
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private static final int NUM_TYPES = 2; |
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// WARNING: if the number of pools changes in the future, |
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// this test needs to be modified to handle different version of VMs. |
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// Hotspot VM 1.5 expected to have |
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// heap memory pools = 3 (Eden, Survivor spaces, Old gen) |
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// non-heap memory pools = 2 (Perm gen, Code cache) |
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// or 4 if Class Sharing is enabled. |
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// Number of memory managers = 3 |
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// They are: Copy/Scavenger + MSC + CodeCache manager |
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// (or equivalent for other collectors) |
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// Number of GC memory managers = 2 |
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// Hotspot VM 1.8+ after perm gen removal is expected to have between two |
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// or five non-heap memory pools: |
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// - Code cache (between one and three depending on the -XX:SegmentedCodeCache option) |
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// - Metaspace |
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// - Compressed Class Space (if compressed class pointers are used) |
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private static int[] expectedMinNumPools = new int[2]; |
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private static int[] expectedMaxNumPools = new int[2]; |
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private static int expectedNumGCMgrs; |
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private static int expectedNumMgrs; |
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private static String[] types = { "heap", "non-heap" }; |
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public static void main(String args[]) throws Exception { |
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expectedNumGCMgrs = Integer.valueOf(args[0]); |
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expectedNumMgrs = expectedNumGCMgrs + 2; |
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int expectedNumPools = Integer.valueOf(args[1]); |
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expectedMinNumPools[HEAP] = expectedNumPools; |
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expectedMaxNumPools[HEAP] = expectedNumPools; |
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8204173: Lower the minimum number of heap memory pools in MemoryTest.java
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expectedMinNumPools[NONHEAP] = 2; |
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expectedMaxNumPools[NONHEAP] = 5; |
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checkMemoryPools(); |
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checkMemoryManagers(); |
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if (testFailed) |
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throw new RuntimeException("TEST FAILED."); |
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System.out.println("Test passed."); |
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} |
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private static void checkMemoryPools() throws Exception { |
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List pools = ManagementFactory.getMemoryPoolMXBeans(); |
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boolean hasPerm = false; |
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int[] numPools = new int[NUM_TYPES]; |
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for (ListIterator iter = pools.listIterator(); iter.hasNext();) { |
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MemoryPoolMXBean pool = (MemoryPoolMXBean) iter.next(); |
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if (pool.getType() == MemoryType.HEAP) { |
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numPools[HEAP]++; |
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} |
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if (pool.getType() == MemoryType.NON_HEAP) { |
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numPools[NONHEAP]++; |
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} |
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if (pool.getName().toLowerCase().contains("perm")) { |
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hasPerm = true; |
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} |
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} |
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if (hasPerm) { |
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// If the VM has perm gen there will be between 2 and 4 non heap |
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// pools (4 if class data sharing is used) |
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expectedMinNumPools[NONHEAP] = 2; |
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expectedMaxNumPools[NONHEAP] = 4; |
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} |
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// Check the number of Memory pools |
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for (int i = 0; i < NUM_TYPES; i++) { |
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if (numPools[i] < expectedMinNumPools[i] || |
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numPools[i] > expectedMaxNumPools[i]) { |
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throw new RuntimeException("TEST FAILED: " + |
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"Number of " + types[i] + " pools = " + numPools[i] + |
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" but expected <= " + expectedMaxNumPools[i] + |
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" and >= " + expectedMinNumPools[i]); |
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} |
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} |
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} |
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private static void checkMemoryManagers() throws Exception { |
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List mgrs = ManagementFactory.getMemoryManagerMXBeans(); |
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int numGCMgr = 0; |
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// Check the number of Memory Managers |
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for (ListIterator iter = mgrs.listIterator(); iter.hasNext();) { |
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MemoryManagerMXBean mgr = (MemoryManagerMXBean) iter.next(); |
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String[] poolNames = mgr.getMemoryPoolNames(); |
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if (poolNames == null || poolNames.length == 0) { |
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throw new RuntimeException("TEST FAILED: " + |
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"Expected to have one or more pools for " + |
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mgr.getName() + "manager."); |
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} |
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if (mgr instanceof GarbageCollectorMXBean) { |
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numGCMgr++; |
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} else { |
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for (int i = 0; i < poolNames.length; i++) { |
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checkPoolType(poolNames[i], MemoryType.NON_HEAP); |
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} |
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} |
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} |
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if (mgrs.size() != expectedNumMgrs) { |
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throw new RuntimeException("TEST FAILED: " + |
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"Number of memory managers = " + mgrs.size() + |
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" but expected = " + expectedNumMgrs); |
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} |
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if (numGCMgr != expectedNumGCMgrs) { |
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throw new RuntimeException("TEST FAILED: " + |
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"Number of GC managers = " + numGCMgr + " but expected = " + |
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expectedNumGCMgrs); |
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} |
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} |
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private static List pools = ManagementFactory.getMemoryPoolMXBeans(); |
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private static void checkPoolType(String name, MemoryType type) |
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throws Exception { |
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for (ListIterator iter = pools.listIterator(); iter.hasNext(); ) { |
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MemoryPoolMXBean pool = (MemoryPoolMXBean) iter.next(); |
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if (pool.getName().equals(name)) { |
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if (pool.getType() != type) { |
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throw new RuntimeException("TEST FAILED: " + |
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"Pool " + pool.getName() + " is of type " + |
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pool.getType() + " but expected to be " + type); |
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} else { |
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return; |
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} |
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} |
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} |
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throw new RuntimeException("TEST FAILED: " + |
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"Pool " + name + " is of type " + type + |
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" not found"); |
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} |
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} |