1 /*

     2  * Copyright (c) 2011, 2018, 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  */

    23 

    24 package nsk.monitoring.ThreadMXBean.GetThreadAllocatedBytes;

    25 

    26 import nsk.share.*;

    27 import nsk.monitoring.share.*;

    28 import nsk.monitoring.ThreadMXBean.ThreadMXBeanTestBase;

    29 import nsk.monitoring.ThreadMXBean.MXBeanTestThread;

    30 import nsk.monitoring.ThreadMXBean.BarrierHandler;

    31 

    32 /**

    33  * Tests getThreadAllocatedBytes(long id) function of com.sun.management.ThreadMXBean

    34  * <p>

    35  *  - Check that result of getThreadAllocatedBytes(long id) call for similar

    36  * threads are approximately equals.

    37  */

    38 public class EqualThreadsTest extends ThreadMXBeanTestBase {

    39 

    40     /**

    41      * Actually runs the test

    42      */

    43     public void run() {

    44         if (threadMXBean == null)

    45             return;

    46         MXBeanTestThread.warmUp(garbageProducerId);

    47         MXBeanTestThread tr1 = new MXBeanTestThread(garbageProducerId);

    48         MXBeanTestThread tr2 = new MXBeanTestThread(garbageProducerId);

    49         BarrierHandler handler = startThreads(tr1, tr2);

    50         try {

    51             long startBytesTr1 = threadMXBean.getThreadAllocatedBytes(tr1.getId());

    52             long startBytesTr2 = threadMXBean.getThreadAllocatedBytes(tr2.getId());

    53             handler.proceed();

    54             long value1 = threadMXBean.getThreadAllocatedBytes(tr1.getId())

    55                 - startBytesTr1;

    56             long value2 = threadMXBean.getThreadAllocatedBytes(tr2.getId())

    57                 - startBytesTr2;

    58             // Expect value1 and value2 differs not more then for 10%

    59             if ( Math.abs(value1 - value2) > value1*DELTA_PERCENT/100)

    60                 throw new TestFailure("Failure! Let f(thread) = getThreadAllocatedBytes()."

    61                     + " Expected if thread tr1 is similar to thread tr2"

    62                     + " then f(tr1) and f(tr2) differs not more then for "

    63                     + DELTA_PERCENT + " %. Recieved: f(tr1)=" + value1

    64                     + " f(tr2)=" + value2);

    65             log.info("EqualThreadsTest passed.");

    66         } finally {

    67             handler.finish();

    68         }

    69     }

    70 

    71     /**

    72      * Entry point for java program

    73      * @param args sets the test configuration

    74      */

    75     public static void main(String[] args) {

    76         ThreadMXBeanTestBase test = new EqualThreadsTest();

    77         Monitoring.runTest(test, test.setGarbageProducer(args));

    78     }

    79 }