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Make the standard deviation calculation a little easier on the eyes

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Denny Page
2016-01-30 20:44:10 -08:00
parent 85d345f47f
commit afbde05bcb
1 changed files with 5 additions and 3 deletions
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dpinger.c
+5 -3
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@@ -479,10 +479,12 @@ report(
if (packets_received)
{
*average_latency_usec = total_latency_usec / packets_received;
unsigned long avg = total_latency_usec / packets_received;
unsigned long long avg2 = total_latency_usec2 / packets_received;
// sqrt( (sum(rtt^2) / packets) - (sum(rtt) / packets)^2)
*latency_deviation = llsqrt((total_latency_usec2 / packets_received) - (total_latency_usec / packets_received) * (total_latency_usec / packets_received));
// stddev = sqrt((sum(rtt^2) / packets) - (sum(rtt) / packets)^2)
*average_latency_usec = avg;
*latency_deviation = llsqrt(avg2 - (avg * avg));
}
else
{