--- /dev/null 2020-01-02 04:43:18.583999853 +0000 +++ new/test/jdk/jfr/event/runtime/TestNetworkUtilizationEvent.java 2020-01-30 06:35:25.946189477 +0000 @@ -0,0 +1,108 @@ +/* + * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. Oracle designates this + * particular file as subject to the "Classpath" exception as provided + * by Oracle in the LICENSE file that accompanied this code. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + */ + +package jdk.jfr.event.runtime; + +import java.net.DatagramPacket; +import java.net.DatagramSocket; +import java.net.InetAddress; +import java.util.HashSet; +import java.util.List; +import java.util.Set; + +import jdk.jfr.Recording; +import jdk.jfr.consumer.RecordedEvent; +import jdk.test.lib.Asserts; +import jdk.test.lib.Platform; +import jdk.test.lib.jfr.EventNames; +import jdk.test.lib.jfr.Events; + +/** + * @test + * @key jfr + * + * @library /lib / + * + * @run main/othervm jdk.jfr.event.runtime.TestNetworkUtilizationEvent + */ +public class TestNetworkUtilizationEvent { + + private static final long packetSendCount = 100; + + public static void main(String[] args) throws Throwable { + + Recording recording = new Recording(); + recording.enable(EventNames.NetworkUtilization).with("period", "endChunk"); + recording.start(); + + DatagramSocket socket = new DatagramSocket(); + String msg = "hello!"; + byte[] buf = msg.getBytes(); + forceEndChunk(); + // Send a few packets both to the loopback address as well to an + // external + DatagramPacket packet = new DatagramPacket(buf, buf.length, InetAddress.getLoopbackAddress(), 12345); + for (int i = 0; i < packetSendCount; ++i) { + socket.send(packet); + } + packet = new DatagramPacket(buf, buf.length, InetAddress.getByName("10.0.0.0"), 12345); + for (int i = 0; i < packetSendCount; ++i) { + socket.send(packet); + } + + forceEndChunk(); + socket.close(); + // Now there should have been traffic on at least two different + // interfaces + recording.stop(); + Set networkInterfaces = new HashSet<>(); + List events = Events.fromRecording(recording); + Events.hasEvents(events); + for (RecordedEvent event : events) { + System.out.println(event); + Events.assertField(event, "writeRate").atLeast(0L).atMost(1000L * Integer.MAX_VALUE); + Events.assertField(event, "readRate").atLeast(0L).atMost(1000L * Integer.MAX_VALUE); + Events.assertField(event, "networkInterface").notNull(); + if (event.getLong("writeRate") > 0) { + networkInterfaces.add(event.getString("networkInterface")); + } + } + + if (Platform.isWindows() || Platform.isSolaris()) { + // Windows and Solaris do not track statistics for the loopback + // interface + Asserts.assertGreaterThanOrEqual(networkInterfaces.size(), 1); + } else { + Asserts.assertGreaterThanOrEqual(networkInterfaces.size(), 2); + } + } + + private static void forceEndChunk() { + try(Recording r = new Recording()) { + r.start(); + r.stop(); + } + } +}