On Wed, Dec 22, 2010 at 5:30 PM, Pradeep Kumar <pradeepkernel@gmail.com> 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:-
http://people.redhat.com/srostedt/