Re: [PATCH 4/6] trace: Add tracepoints to reschedule interrupt handler

[David Sharp]

On Fri, Jul 15, 2011 at 1:48 AM, Peter Zijlstra <a.p.zijlstra@xxxxxxxxx> wrote:
> On Fri, 2011-07-15 at 00:02 +0200, Frederic Weisbecker wrote:
>> > This is a part of overall effort to trace all the interrupts happening
>> > in a system to figure out what time is spent in kernel space versus user
>> > space.
>
> How about you enable CONFIG_IRQ_TIME_ACCOUNTING and get all that?
>

It's not just about how long, it's when, and what other events the
interrupts are interacting with.
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