6 Frequency (Hz): the number of interruptions per second (Hz)
8 Total Duration (nsec): the sum of each interrupt duration in nsec
10 Duration standard deviation (nsec): taken from
11 http://en.wikipedia.org/wiki/Standard_deviation
12 Duration Standard_deviation = sqrt(1/N Sum ((xi -Xa)^2)) where
13 N: the total number of interrupts
14 xi: the duration of an interrupt
15 Xa: the average duration is the total duration divided by the total number of interrupts (N)
17 Max IRQ handler duration (nsec) [time interval]: the longest IRQ handler duration in nsec.
19 Average period (nsec): 1/Frequency
21 Period Standard_deviation = sqrt(1/N Sum ((xi -Xa)^2)) where
22 N: number of interrupts
23 xi: duration of an interrupt
24 Xa: Average period in nsec