| 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 |