1 /*
   2  * Copyright (c) 2018, 2019, 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.io.IOException;
  29 import java.net.DatagramPacket;
  30 import java.net.DatagramSocket;
  31 import java.net.InetAddress;
  32 import java.net.NetworkInterface;
  33 import java.util.HashSet;
  34 import java.util.List;
  35 import java.util.Set;
  36 import java.util.stream.Stream;
  37 
  38 import jdk.jfr.Recording;
  39 import jdk.jfr.consumer.RecordedEvent;
  40 import jdk.test.lib.Asserts;
  41 import jdk.test.lib.Platform;
  42 import jdk.test.lib.jfr.EventNames;
  43 import jdk.test.lib.jfr.Events;
  44 
  45 /**
  46  * @test
  47  * @key jfr
  48  * @requires vm.hasJFR
  49  * @library /test/lib
  50  *
  51  * @run main/othervm -Xlog:jfr+event=trace jdk.jfr.event.runtime.TestNetworkUtilizationEvent
  52  */
  53 public class TestNetworkUtilizationEvent {
  54 
  55     private static final long packetSendCount = 100;
  56 
  57     public static void main(String[] args) throws Throwable {
  58         Set<String> networkInterfaces = new HashSet<>();
  59 
  60         Recording recording = new Recording();
  61         recording.enable(EventNames.NetworkUtilization).with("period", "endChunk");
  62         recording.start();
  63 
  64         DatagramSocket socket = new DatagramSocket();
  65         String msg = "hello!";
  66         byte[] buf = msg.getBytes();
  67         forceEndChunk();
  68         // Send a few packets both to the loopback address as well to an external
  69         InetAddress iadr1 = InetAddress.getLoopbackAddress();
  70         System.out.println("InetAddress.getLoopbackAddress :" + iadr1 + " host address:" + iadr1.getHostAddress());
  71 
  72         DatagramPacket packet = new DatagramPacket(buf, buf.length, iadr1, 12345);
  73         for (int i = 0; i < packetSendCount; ++i) {
  74             socket.send(packet);
  75         }
  76 
  77         Stream<InetAddress> si = NetworkInterface.networkInterfaces().flatMap(NetworkInterface::inetAddresses);
  78         si.forEach(inetAddr->{
  79             System.out.println("Sending to InetAddress:" + inetAddr);
  80             try {
  81                 java.util.concurrent.TimeUnit.SECONDS.sleep(1);
  82             } catch (InterruptedException e) { }
  83             try {
  84                 final DatagramPacket packet2 = new DatagramPacket(buf, buf.length, inetAddr, 12345);
  85                 for (int i = 0; i < packetSendCount; ++i) {
  86                     socket.send(packet2);
  87                 }
  88             } catch(IOException ioe) {
  89             }
  90         });
  91 
  92         forceEndChunk();
  93         socket.close();
  94         // Now there should have been traffic on at least two different interfaces
  95         recording.stop();
  96 
  97         List<RecordedEvent> events = Events.fromRecording(recording);
  98         Events.hasEvents(events);
  99         for (RecordedEvent event : events) {
 100             System.out.println(event);
 101             Events.assertField(event, "writeRate").atLeast(0L).atMost(1000L * Integer.MAX_VALUE);
 102             Events.assertField(event, "readRate").atLeast(0L).atMost(1000L * Integer.MAX_VALUE);
 103             Events.assertField(event, "networkInterface").notNull();
 104             if (event.getLong("writeRate") > 0) {
 105                 networkInterfaces.add(event.getString("networkInterface"));
 106             }
 107         }
 108 
 109         System.out.println("number of network interfaces with positive writeRate found is " + networkInterfaces.size());
 110 
 111         if (Platform.isWindows() || Platform.isSolaris()) {
 112             // Windows and Solaris do not track statistics for the loopback interface
 113             Asserts.assertGreaterThanOrEqual(networkInterfaces.size(), 1, "Not enough network interfaces found");
 114         } else {
 115             Asserts.assertGreaterThanOrEqual(networkInterfaces.size(), 2, "Not enough network interfaces found");
 116         }
 117     }
 118 
 119     private static void forceEndChunk() {
 120        try(Recording r = new Recording()) {
 121            r.start();
 122            r.stop();
 123        }
 124     }
 125 }