J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2003-2004 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 20 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 21 | * have any questions. |
| 22 | */ |
| 23 | |
| 24 | /* |
| 25 | * @test |
| 26 | * @bug 4530538 |
| 27 | * @summary Basic unit test of MemoryMXBean.getMemoryPools() and |
| 28 | * MemoryMXBean.getMemoryManager(). |
| 29 | * @author Mandy Chung |
| 30 | * |
| 31 | * @run main MemoryTest 2 |
| 32 | */ |
| 33 | |
| 34 | /* |
| 35 | * NOTE: This expected result is hardcoded in this test and this test |
| 36 | * will be affected if the heap memory layout is changed in |
| 37 | * the future implementation. |
| 38 | */ |
| 39 | |
| 40 | import java.lang.management.*; |
| 41 | import java.util.*; |
| 42 | |
| 43 | public class MemoryTest { |
| 44 | private static boolean testFailed = false; |
| 45 | private static MemoryMXBean mm = ManagementFactory.getMemoryMXBean(); |
| 46 | private static final int HEAP = 0; |
| 47 | private static final int NONHEAP = 1; |
| 48 | private static final int NUM_TYPES = 2; |
| 49 | |
| 50 | // WARNING: if the number of pools changes in the future, |
| 51 | // this test needs to be modified to handle different version of VMs. |
| 52 | |
| 53 | // Hotspot VM 1.5 expected to have |
| 54 | // heap memory pools = 3 (Eden, Survivor spaces, Old gen) |
| 55 | // non-heap memory pools = 2 (Perm gen, Code cache) |
| 56 | // or 4 if Class Sharing is enabled. |
| 57 | // Number of memory managers = 3 |
| 58 | // They are: Copy/Scavenger + MSC + CodeCache manager |
| 59 | // (or equivalent for other collectors) |
| 60 | // Number of GC memory managers = 2 |
| 61 | private static int[] expectedMinNumPools = {3, 2}; |
| 62 | private static int[] expectedMaxNumPools = {3, 4}; |
| 63 | private static int expectedNumGCMgrs = 2; |
| 64 | private static int expectedNumMgrs = expectedNumGCMgrs + 1; |
| 65 | private static String[] types = { "heap", "non-heap" }; |
| 66 | |
| 67 | public static void main(String args[]) throws Exception { |
| 68 | Integer value = new Integer(args[0]); |
| 69 | expectedNumGCMgrs = value.intValue(); |
| 70 | expectedNumMgrs = expectedNumGCMgrs + 1; |
| 71 | |
| 72 | checkMemoryPools(); |
| 73 | checkMemoryManagers(); |
| 74 | if (testFailed) |
| 75 | throw new RuntimeException("TEST FAILED."); |
| 76 | |
| 77 | System.out.println("Test passed."); |
| 78 | |
| 79 | } |
| 80 | |
| 81 | private static void checkMemoryPools() throws Exception { |
| 82 | List pools = ManagementFactory.getMemoryPoolMXBeans(); |
| 83 | |
| 84 | int[] numPools = new int[NUM_TYPES]; |
| 85 | for (ListIterator iter = pools.listIterator(); iter.hasNext();) { |
| 86 | MemoryPoolMXBean pool = (MemoryPoolMXBean) iter.next(); |
| 87 | if (pool.getType() == MemoryType.HEAP) { |
| 88 | numPools[HEAP]++; |
| 89 | } |
| 90 | if (pool.getType() == MemoryType.NON_HEAP) { |
| 91 | numPools[NONHEAP]++; |
| 92 | } |
| 93 | } |
| 94 | |
| 95 | // Check the number of Memory pools |
| 96 | for (int i = 0; i < NUM_TYPES; i++) { |
| 97 | if (numPools[i] < expectedMinNumPools[i] || |
| 98 | numPools[i] > expectedMaxNumPools[i]) { |
| 99 | throw new RuntimeException("TEST FAILED: " + |
| 100 | "Number of " + types[i] + " pools = " + numPools[i] + |
| 101 | " but expected <= " + expectedMaxNumPools[i] + |
| 102 | " and >= " + expectedMinNumPools[i]); |
| 103 | } |
| 104 | } |
| 105 | } |
| 106 | |
| 107 | private static void checkMemoryManagers() throws Exception { |
| 108 | List mgrs = ManagementFactory.getMemoryManagerMXBeans(); |
| 109 | |
| 110 | int numGCMgr = 0; |
| 111 | |
| 112 | // Check the number of Memory Managers |
| 113 | for (ListIterator iter = mgrs.listIterator(); iter.hasNext();) { |
| 114 | MemoryManagerMXBean mgr = (MemoryManagerMXBean) iter.next(); |
| 115 | String[] poolNames = mgr.getMemoryPoolNames(); |
| 116 | if (poolNames == null || poolNames.length == 0) { |
| 117 | throw new RuntimeException("TEST FAILED: " + |
| 118 | "Expected to have one or more pools for " + |
| 119 | mgr.getName() + "manager."); |
| 120 | } |
| 121 | |
| 122 | if (mgr instanceof GarbageCollectorMXBean) { |
| 123 | numGCMgr++; |
| 124 | } else { |
| 125 | for (int i = 0; i < poolNames.length; i++) { |
| 126 | checkPoolType(poolNames[i], MemoryType.NON_HEAP); |
| 127 | } |
| 128 | } |
| 129 | } |
| 130 | |
| 131 | if (mgrs.size() != expectedNumMgrs) { |
| 132 | throw new RuntimeException("TEST FAILED: " + |
| 133 | "Number of memory managers = " + mgrs.size() + |
| 134 | " but expected = " + expectedNumMgrs); |
| 135 | } |
| 136 | if (numGCMgr != expectedNumGCMgrs) { |
| 137 | throw new RuntimeException("TEST FAILED: " + |
| 138 | "Number of GC managers = " + numGCMgr + " but expected = " + |
| 139 | expectedNumGCMgrs); |
| 140 | } |
| 141 | } |
| 142 | private static List pools = ManagementFactory.getMemoryPoolMXBeans(); |
| 143 | private static void checkPoolType(String name, MemoryType type) |
| 144 | throws Exception { |
| 145 | for (ListIterator iter = pools.listIterator(); iter.hasNext(); ) { |
| 146 | MemoryPoolMXBean pool = (MemoryPoolMXBean) iter.next(); |
| 147 | if (pool.getName().equals(name)) { |
| 148 | if (pool.getType() != type) { |
| 149 | throw new RuntimeException("TEST FAILED: " + |
| 150 | "Pool " + pool.getName() + " is of type " + |
| 151 | pool.getType() + " but expected to be " + type); |
| 152 | } else { |
| 153 | return; |
| 154 | } |
| 155 | } |
| 156 | } |
| 157 | throw new RuntimeException("TEST FAILED: " + |
| 158 | "Pool " + name + " is of type " + type + |
| 159 | " not found"); |
| 160 | } |
| 161 | } |