Re: [Fwd: Re: [patch] Real-Time Preemption, -RT-2.6.9-mm1-V0.4]

Lee Revell
2004-10-30T21:26:14Z

On Sat, 2004-10-30 at 23:13 +0200, Florian Schmidt wrote:
> ah, ok.. tarball updated. The third argument is now a percentage. If the
> cycle count difference between two different wakeups differs more than the
> specified percentage from the "perfect" period, then a line is printed to
> the terminal showing by how much percent it differs.

OK this is pretty sweet. With T3 the jitter never exceeds 7% on an idle
system. As soon as I start moving the mouse this goes to 7 or 8%. I
cannot get it to go higher than 10%. Moving windows around has no
effect, the highest jitter happens when I type or move the mouse really
fast IOW it corresponds to the interrupt rate.

This is a pretty good baseline for what an xrun-free system would look
like. Now to test the latest version...

Lee