[lttv.git] / trunk / lttv / lttv / modules / gui / interrupts / README

\r
CPUID: processor ID\r
\r
IrqId: IRQ ID\r
\r
Frequency (Hz): the number of interruptions per second (Hz)\r
\r
Total Duration (nsec): the sum of each interrupt duration in nsec\r
\r
Duration standard deviation (nsec):   taken from \r
http://en.wikipedia.org/wiki/Standard_deviation\r
Duration Standard_deviation  = sqrt(1/N Sum ((xi -Xa)^2)) where\r
N: the total number of interrupts \r
xi: the duration of an interrupt\r
Xa: the average duration is the total duration divided by the total number of interrupts (N)\r
\r
Max IRQ handler duration (nsec) [time interval]:   the longest IRQ handler duration in nsec.  \r
\r
Average period (nsec): 1/Frequency\r
 \r
Period Standard_deviation  = sqrt(1/N Sum ((xi -Xa)^2)) where\r
N:  number of interrupts \r
xi: duration of an interrupt\r
Xa: Average period in nsec\r
Commit	Line	Data
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