Re: 2.6.15-ck1

[Con Kolivas <kernel@kolivas.org>]

On Thursday 05 January 2006 11:27, Dave Jones wrote:
> On Thu, Jan 05, 2006 at 11:12:51AM +1100, Con Kolivas wrote:
>  > On Thursday 05 January 2006 08:40, Radoslaw Szkodzinski wrote:
>  > > Arjan van de Ven wrote:
>  > > > On Wed, 2006-01-04 at 14:57 -0500, Dave Jones wrote:
>  > > >
>  > > > sounds like we need some sort of profiler or benchmarker or at least
>  > > > a tool that helps finding out which timers are regularly firing,
>  > > > with the aim at either grouping them or trying to reduce their
>  > > > disturbance in some form.
>  > >
>  > > You mean something like a modification to timer debugging patch to
>  > > record the last time the timer fired, right?
>  > > Timertop could then detect the pattern and provide frequency, standard
>  > > deviation and other statistical data.
>  > > It would be much more expensive to test of course.
>  >
>  > I don't think the timer debugging patch needs to give out any more info.
>  > The userspace tool should be able to do this with the amount of info the
>  > timer debugging patch is giving already.
>
> In the absense of a pointer to a userspace tool, I found the following
> handy. (It also fixes a bug where it was printing garbage as process
> names).

Timertop and pmstats are here:
http://ck.kolivas.org/patches/dyn-ticks/

Cheers,
Con