private void _cnx_PingRequested(ITransport transport, uint sequence)
{
IList<uint> outstanding;
if (!outstandingPings.TryGetValue(transport, out outstanding))
{
outstandingPings[transport] = outstanding = new List<uint>();
}
outstanding.Add(sequence);
if (!statistics.ContainsKey(transport))
{
statistics[transport] = new StatisticalMoments();
}
}
private void _cnx_PingReceived(ITransport transport, uint sequence, TimeSpan roundtrip)
{
IList<uint> outstanding;
if (!outstandingPings.TryGetValue(transport, out outstanding))
{
Console.WriteLine("Warning: received ping to a ping that hadn't been sent!");
}
else
{
outstanding.Remove(sequence);
}
StatisticalMoments sm;
if (!statistics.TryGetValue(transport, out sm))
{
Console.WriteLine("Weird: no statistics either");
statistics[transport] = sm = new StatisticalMoments();
}
sm.Accumulate(roundtrip.TotalMilliseconds);
Console.WriteLine("Ping #{1} {2:f}ms on {0}", transport,
sequence, roundtrip.TotalMilliseconds);
}
public void TestSomeData()
{
StatisticalMoments sm = new StatisticalMoments();
for (int i = 0; i < 10; i++) { sm.Accumulate(i); }
Assert.AreEqual(10, sm.Count());
Assert.AreEqual(4.5, sm.Average());
Assert.AreEqual(82.5, sm.UnnormalizedVariance());
Assert.Greater(9.16667, sm.Variance());
Assert.Less(9.16666, sm.Variance());
Assert.AreEqual(0, sm.Skewness());
Assert.Greater(-1.19, sm.Kurtosis());
Assert.Less(-1.2, sm.Kurtosis());
}
public void TestZeros()
{
StatisticalMoments sm = new StatisticalMoments();
for (int i = 0; i < 5; i++) { sm.Accumulate(0); }
Assert.AreEqual(5, sm.Count());
Assert.AreEqual(0, sm.Average());
Assert.AreEqual(0, sm.UnnormalizedVariance());
Assert.AreEqual(0, sm.Variance());
Assert.IsNaN(sm.Skewness()); // must be NaN if variance is 0
Assert.IsNaN(sm.Kurtosis()); // must be NaN if variance is 0
}
public void TestEmptyNaN()
{
StatisticalMoments sm = new StatisticalMoments();
Assert.AreEqual(0, sm.Count());
Assert.AreEqual(0, sm.Average());
Assert.AreEqual(0, sm.UnnormalizedVariance());
Assert.IsNaN(sm.Variance());
Assert.IsNaN(sm.Skewness());
Assert.IsNaN(sm.Kurtosis());
}