public StatisticBucket Penalize(double penalty)
{
var total = Interlocked.Read(ref totalCount);
var successSum = InterlockedEx.Read(ref successLatencySum);
var successSquareSum = InterlockedEx.Read(ref successLatencySquaredSum);
var rejected = Interlocked.Read(ref rejectCount);
var rejectSum = InterlockedEx.Read(ref rejectLatencySum);
var rejectSquareSum = InterlockedEx.Read(ref rejectLatencySquaredSum);
return(new StatisticBucket(
total,
rejected,
successSum,
successSquareSum,
PenalizeLatency(
rejectSum,
rejected,
penalty),
PenalizeSquaredLatency(
rejectSum,
rejectSquareSum,
rejected,
penalty)
));
}
public AggregatedStatistic Aggregate(DateTime timestamp)
{
var total = Math.Max(1, Interlocked.Read(ref totalCount));
var mean = (InterlockedEx.Read(ref successLatencySum) + InterlockedEx.Read(ref rejectLatencySum)) / total;
var squaredMean = (InterlockedEx.Read(ref successLatencySquaredSum) + InterlockedEx.Read(ref rejectLatencySquaredSum)) / total;
var variance = Math.Max(0d, squaredMean - mean * mean);
var stdDev = Math.Sqrt(variance);
var errorFraction = (double)Interlocked.Read(ref rejectCount) / total;
return(new AggregatedStatistic(total, errorFraction, stdDev, mean, timestamp));
}