26b8f47a |
1 | \r |
2 | CPUID: processor ID\r |
3 | \r |
4 | IrqId: IRQ ID\r |
5 | \r |
6 | Frequency (Hz): the number of interruptions per second (Hz)\r |
7 | \r |
8 | Total Duration (nsec): the sum of each interrupt duration in nsec\r |
9 | \r |
10 | Duration standard deviation (nsec): taken from \r |
11 | http://en.wikipedia.org/wiki/Standard_deviation\r |
12 | Duration Standard_deviation = sqrt(1/N Sum ((xi -Xa)^2)) where\r |
13 | N: the total number of interrupts \r |
14 | xi: the duration of an interrupt\r |
15 | Xa: the average duration is the total duration divided by the total number of interrupts (N)\r |
16 | \r |
17 | Max IRQ handler duration (nsec) [time interval]: the longest IRQ handler duration in nsec. \r |
18 | \r |
19 | Average period (nsec): 1/Frequency\r |
20 | \r |
21 | Period Standard_deviation = sqrt(1/N Sum ((xi -Xa)^2)) where\r |
22 | N: number of interrupts \r |
23 | xi: duration of an interrupt\r |
24 | Xa: Average period in nsec\r |