how to measure IRQ service latency

loody miloody at
Wed Jan 12 23:53:59 EST 2011


2010/12/22 neependra.khare at <neependra.khare at>:
> On Wed, Dec 22, 2010 at 5:30 PM, Pradeep Kumar <pradeepkernel at>
> wrote:
>> hi,
>>     can any one suggest a way to measure IRQ service latency? .
> I believe you can measure it with Ftrace. You might need to use irqsoff
> tracer.
> For reference:-
I go into the website and see a lot of files with suffix odp.
is there any document which can tell us how to use it?

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