1 /*
   2  * Copyright (c) 2020, 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.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package jdk.jfr.event.runtime;
  27 
  28 import java.nio.ByteBuffer;
  29 import java.util.List;
  30 
  31 import jdk.internal.misc.VM;
  32 
  33 import jdk.jfr.Recording;
  34 import jdk.jfr.consumer.RecordedEvent;
  35 import jdk.test.lib.Asserts;
  36 import jdk.test.lib.jfr.EventNames;
  37 import jdk.test.lib.jfr.Events;
  38 
  39 /**
  40  * @test
  41  * @key jfr
  42  * @requires vm.hasJFR
  43  * @library /test/lib
  44  * @modules java.base/jdk.internal.misc
  45  * @run main/othervm -XX:MaxDirectMemorySize=128m jdk.jfr.event.runtime.TestDirectBufferStatisticsEvent
  46  * @run main/othervm jdk.jfr.event.runtime.TestDirectBufferStatisticsEvent
  47  */
  48 public class TestDirectBufferStatisticsEvent {
  49 
  50     private static final String EVENT_PATH = EventNames.DirectBufferStatistics;
  51 
  52     public static void main(String[] args) throws Throwable {
  53         try (Recording recording = new Recording()) {
  54             recording.enable(EVENT_PATH);
  55             recording.start();
  56             int rounds = 16;
  57             int size = 1 * 1024 * 1024; // 1M
  58             for (int i = 0; i < rounds; i++) {
  59                 ByteBuffer.allocateDirect(size);
  60             }
  61             recording.stop();
  62 
  63             List<RecordedEvent> events = Events.fromRecording(recording);
  64             Events.hasEvents(events);
  65 
  66             long count = 0;
  67             long totalCapacity = 0;
  68             long memoryUsed = 0;
  69 
  70             for (RecordedEvent event : events) {
  71                 System.out.println(event);
  72                 Asserts.assertTrue(Events.isEventType(event, EVENT_PATH), "Wrong event type");
  73                 count = Math.max(count, Events.assertField(event, "count").getValue());
  74                 totalCapacity = Math.max(totalCapacity, Events.assertField(event, "totalCapacity").getValue());
  75                 memoryUsed = Math.max(memoryUsed, Events.assertField(event, "memoryUsed").getValue());
  76                 Asserts.assertEquals(VM.maxDirectMemory(), Events.assertField(event, "maxCapacity").getValue());
  77             }
  78 
  79             Asserts.assertGreaterThanOrEqual(count, (long)rounds, "Too few count in statistics event");
  80             Asserts.assertGreaterThanOrEqual(totalCapacity, (long)(rounds * size), "Too few totalCapacity in statistics event");
  81             Asserts.assertGreaterThanOrEqual(memoryUsed, totalCapacity, "Too few memoryUsed in statistics event");
  82         }
  83     }
  84 }