jdk8-mips64-public/hotspot: test/gc/metaspace/TestPerfCountersAndMemoryPools.java@14b8221771dc

     1 /*

     2  * Copyright (c) 2013, 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  */

    24 import java.util.List;

    25 import java.lang.management.*;

    27 import com.oracle.java.testlibrary.*;

    28 import static com.oracle.java.testlibrary.Asserts.*;

    30 /* @test TestPerfCountersAndMemoryPools

    31  * @bug 8023476

    32  * @library /testlibrary

    33  * @summary Tests that a MemoryPoolMXBeans and PerfCounters for metaspace

    34  *          report the same data.

    35  * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-UseCompressedOops -XX:-UseCompressedKlassPointers -XX:+UseSerialGC -XX:+UsePerfData -Xint TestPerfCountersAndMemoryPools

    36  * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+UseCompressedOops -XX:+UseCompressedKlassPointers -XX:+UseSerialGC -XX:+UsePerfData -Xint TestPerfCountersAndMemoryPools

    37  */

    38 public class TestPerfCountersAndMemoryPools {

    39     public static void main(String[] args) throws Exception {

    40         checkMemoryUsage("Metaspace", "sun.gc.metaspace");

    42         if (InputArguments.contains("-XX:+UseCompressedKlassPointers") && Platform.is64bit()) {

    43             checkMemoryUsage("Compressed Class Space", "sun.gc.compressedclassspace");

    44         }

    45     }

    47     private static MemoryPoolMXBean getMemoryPool(String memoryPoolName) {

    48         List<MemoryPoolMXBean> pools = ManagementFactory.getMemoryPoolMXBeans();

    49         for (MemoryPoolMXBean pool : pools) {

    50             if (pool.getName().equals(memoryPoolName)) {

    51                 return pool;

    52             }

    53         }

    55         throw new RuntimeException("Excpted to find a memory pool with name " +

    56                                    memoryPoolName);

    57     }

    59     private static void checkMemoryUsage(String memoryPoolName, String perfNS)

    60         throws Exception {

    61         MemoryPoolMXBean pool = getMemoryPool(memoryPoolName);

    63         // Must do a GC to update performance counters

    64         System.gc();

    65         assertEQ(getMinCapacity(perfNS), pool.getUsage().getInit());

    67         // Must do a second GC to update the perfomance counters again, since

    68         // the call pool.getUsage().getInit() could have allocated some

    69         // metadata.

    70         System.gc();

    71         assertEQ(getUsed(perfNS), pool.getUsage().getUsed());

    72         assertEQ(getCapacity(perfNS), pool.getUsage().getCommitted());

    73     }

    75     private static long getMinCapacity(String ns) throws Exception {

    76         return PerfCounters.findByName(ns + ".minCapacity").longValue();

    77     }

    79     private static long getCapacity(String ns) throws Exception {

    80         return PerfCounters.findByName(ns + ".capacity").longValue();

    81     }

    83     private static long getUsed(String ns) throws Exception {

    84         return PerfCounters.findByName(ns + ".used").longValue();

    85     }

    86 }

Mercurial > jdk8-mips64-public > hotspot / file revision

test/gc/metaspace/TestPerfCountersAndMemoryPools.java@14b8221771dc

test/gc/metaspace/TestPerfCountersAndMemoryPools.java