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package jdk.jfr.event.runtime;
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;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
import java.time.Duration;
import java.time.Instant;
import java.util.List;
import java.util.Map;
import static java.util.stream.Collectors.averagingLong;
import static java.util.stream.Collectors.groupingBy;
/*
* @test
* @key jfr
* @library /test/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 {
testSimple();
}
static void testSimple() throws Throwable {
Instant start = Instant.now();
Recording recording = new Recording();
recording.enable(EventNames.NetworkUtilization);
recording.start();
DatagramSocket socket = new DatagramSocket();
String msg = "hello!";
byte[] buf = msg.getBytes();
// 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);
}
// Now there should have been traffic on at least two different interfaces
recording.stop();
Duration runtime = Duration.between(start, Instant.now());
List<RecordedEvent> events = Events.fromRecording(recording);
// Calculate the average write rate for each interface
Map<String, Double> writeRates = events.stream()
.collect(groupingBy(e -> Events.assertField(e, "networkInterface").getValue(),
averagingLong(e -> Events.assertField(e, "writeRate").getValue())));
// Our test packets should have generated at least this much traffic per second
long expectedTraffic = (buf.length * packetSendCount) / Math.max(1, runtime.toSeconds());
// Count the number of interfaces that have seen at least our test traffic
long interfacesWithTraffic = writeRates.values().stream()
.filter(d -> d >= expectedTraffic)
.count();
if (Platform.isWindows() || Platform.isSolaris()) {
// Windows and Solaris do not track statistics for the loopback interface
Asserts.assertGreaterThanOrEqual(writeRates.size(), 1);
Asserts.assertGreaterThanOrEqual(interfacesWithTraffic, Long.valueOf(1));
} else {
Asserts.assertGreaterThanOrEqual(writeRates.size(), 2);
Asserts.assertGreaterThanOrEqual(interfacesWithTraffic, Long.valueOf(2));
}
}
}