public void MeasuresEventTimeWithHighResolution()
{
if (Environment.OSVersion.Platform != PlatformID.Win32NT)
{
// We only use explicit high-precision timestamping on Windows, relying on .NET implementation defaults for other platforms
return;
}
var healthReporterMock = new Mock <IHealthReporter>();
// Ensure the EventSource is instantiated
EventSourceInputTestSource.Log.Message("warmup");
List <DateTimeOffset> eventTimes = new List <DateTimeOffset>();
Action <EventWrittenEventArgs> eventHandler = e => eventTimes.Add(EventDataExtensions.ToEventData(e, healthReporterMock.Object, "context-unused").Timestamp);
var twoMilliseconds = Math.Round(Stopwatch.Frequency / 500.0);
using (var listener = new EventSourceInputTestListener(eventHandler))
{
for (int i = 0; i < 8; i++)
{
EventSourceInputTestSource.Log.Message(i.ToString());
var sw = Stopwatch.StartNew();
while (sw.ElapsedTicks < twoMilliseconds)
{
// Spin wait
}
}
}
// Event timestamps should have less than 1 ms resolution and thus should all be different
Assert.Equal(8, eventTimes.Distinct().Count());
}
public void MeasuresEventTimeWithHighResolution()
{
var healthReporterMock = new Mock <IHealthReporter>();
// Ensure the EventSource is instantiated
EventSourceInputTestSource.Log.Message("warmup");
List <DateTimeOffset> eventTimes = new List <DateTimeOffset>();
Action <EventWrittenEventArgs> eventHandler = e => eventTimes.Add(EventDataExtensions.ToEventData(e, healthReporterMock.Object, "context-unused").Timestamp);
var hundredMicroseconds = Math.Round(Stopwatch.Frequency / 10000.0);
using (var listener = new EventSourceInputTestListener(eventHandler))
{
for (int i = 0; i < 8; i++)
{
EventSourceInputTestSource.Log.Message(i.ToString());
var sw = Stopwatch.StartNew();
while (sw.ElapsedTicks < hundredMicroseconds)
{
// Spin wait
}
}
}
Assert.True(eventTimes.Distinct().Count() == 8, "Event timestamps should have less than 1 ms resolution and thus should all be different");
}
