1 /*
   2  * Copyright (c) 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.  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.net.DatagramPacket;
  29 import java.net.DatagramSocket;
  30 import java.net.InetAddress;
  31 import java.util.HashSet;
  32 import java.util.List;
  33 import java.util.Set;
  34 
  35 import jdk.jfr.Recording;
  36 import jdk.jfr.consumer.RecordedEvent;
  37 import jdk.test.lib.Asserts;
  38 import jdk.test.lib.Platform;
  39 import jdk.test.lib.jfr.EventNames;
  40 import jdk.test.lib.jfr.Events;
  41 
  42 /**
  43  * @test
  44  * @key jfr
  45  * @requires vm.hasJFR
  46  * @library /test/lib
  47  *
  48  * @run main/othervm jdk.jfr.event.runtime.TestNetworkUtilizationEvent
  49  */
  50 public class TestNetworkUtilizationEvent {
  51 
  52     private static final long packetSendCount = 100;
  53 
  54     public static void main(String[] args) throws Throwable {
  55 
  56         Recording recording = new Recording();
  57         recording.enable(EventNames.NetworkUtilization).with("period", "endChunk");
  58         recording.start();
  59 
  60         DatagramSocket socket = new DatagramSocket();
  61         String msg = "hello!";
  62         byte[] buf = msg.getBytes();
  63         forceEndChunk();
  64         // Send a few packets both to the loopback address as well to an
  65         // external
  66         DatagramPacket packet = new DatagramPacket(buf, buf.length, InetAddress.getLoopbackAddress(), 12345);
  67         for (int i = 0; i < packetSendCount; ++i) {
  68             socket.send(packet);
  69         }
  70         packet = new DatagramPacket(buf, buf.length, InetAddress.getByName("10.0.0.0"), 12345);
  71         for (int i = 0; i < packetSendCount; ++i) {
  72             socket.send(packet);
  73         }
  74         forceEndChunk();
  75         socket.close();
  76         // Now there should have been traffic on at least two different
  77         // interfaces
  78         recording.stop();
  79 
  80         Set<String> networkInterfaces = new HashSet<>();
  81         List<RecordedEvent> events = Events.fromRecording(recording);
  82         Events.hasEvents(events);
  83         for (RecordedEvent event : events) {
  84             System.out.println(event);
  85             Events.assertField(event, "writeRate").atLeast(0L).atMost(1000L * Integer.MAX_VALUE);
  86             Events.assertField(event, "readRate").atLeast(0L).atMost(1000L * Integer.MAX_VALUE);
  87             Events.assertField(event, "networkInterface").notNull();
  88             if (event.getLong("writeRate") > 0) {
  89                 networkInterfaces.add(event.getString("networkInterface"));
  90             }
  91         }
  92 
  93         if (Platform.isWindows() || Platform.isSolaris()) {
  94             // Windows and Solaris do not track statistics for the loopback
  95             // interface
  96             Asserts.assertGreaterThanOrEqual(networkInterfaces.size(), 1);
  97         } else {
  98             Asserts.assertGreaterThanOrEqual(networkInterfaces.size(), 2);
  99         }
 100     }
 101 
 102     private static void forceEndChunk() {
 103        try(Recording r = new Recording()) {
 104            r.start();
 105            r.stop();
 106        }
 107     }
 108 }