test/jdk/jdk/jfr/event/runtime/TestNetworkUtilizationEvent.java
author egahlin
Thu, 13 Dec 2018 23:25:00 +0100
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8215362: JFR GTest JfrTestNetworkUtilization fails Reviewed-by: mgronlun
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/*
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 * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.  Oracle designates this
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 * particular file as subject to the "Classpath" exception as provided
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 * by Oracle in the LICENSE file that accompanied this code.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 */
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package jdk.jfr.event.runtime;
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import java.net.DatagramPacket;
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import java.net.DatagramSocket;
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import java.net.InetAddress;
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import java.util.HashSet;
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import java.util.List;
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import java.util.Set;
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import jdk.jfr.Recording;
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import jdk.jfr.consumer.RecordedEvent;
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import jdk.test.lib.Asserts;
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import jdk.test.lib.Platform;
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import jdk.test.lib.jfr.EventNames;
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import jdk.test.lib.jfr.Events;
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/**
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 * @test
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 * @key jfr
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 * @requires vm.hasJFR
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 * @library /test/lib
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 *
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 * @run main/othervm jdk.jfr.event.runtime.TestNetworkUtilizationEvent
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 */
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public class TestNetworkUtilizationEvent {
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    private static final long packetSendCount = 100;
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    public static void main(String[] args) throws Throwable {
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        Recording recording = new Recording();
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        recording.enable(EventNames.NetworkUtilization).with("period", "endChunk");
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        recording.start();
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        DatagramSocket socket = new DatagramSocket();
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        String msg = "hello!";
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        byte[] buf = msg.getBytes();
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        forceEndChunk();
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        // Send a few packets both to the loopback address as well to an
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        // external
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        DatagramPacket packet = new DatagramPacket(buf, buf.length, InetAddress.getLoopbackAddress(), 12345);
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        for (int i = 0; i < packetSendCount; ++i) {
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            socket.send(packet);
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        }
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        packet = new DatagramPacket(buf, buf.length, InetAddress.getByName("10.0.0.0"), 12345);
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        for (int i = 0; i < packetSendCount; ++i) {
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            socket.send(packet);
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        }
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        forceEndChunk();
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        socket.close();
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        // Now there should have been traffic on at least two different
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        // interfaces
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        recording.stop();
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        Set<String> networkInterfaces = new HashSet<>();
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        List<RecordedEvent> events = Events.fromRecording(recording);
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        Events.hasEvents(events);
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        for (RecordedEvent event : events) {
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            System.out.println(event);
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            Events.assertField(event, "writeRate").atLeast(0L).atMost(1000L * Integer.MAX_VALUE);
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            Events.assertField(event, "readRate").atLeast(0L).atMost(1000L * Integer.MAX_VALUE);
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            Events.assertField(event, "networkInterface").notNull();
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            if (event.getLong("writeRate") > 0) {
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                networkInterfaces.add(event.getString("networkInterface"));
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            }
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        }
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        if (Platform.isWindows() || Platform.isSolaris()) {
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            // Windows and Solaris do not track statistics for the loopback
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            // interface
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            Asserts.assertGreaterThanOrEqual(networkInterfaces.size(), 1);
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        } else {
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            Asserts.assertGreaterThanOrEqual(networkInterfaces.size(), 2);
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        }
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    }
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    private static void forceEndChunk() {
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       try(Recording r = new Recording()) {
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           r.start();
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           r.stop();
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       }
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    }
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}