Re: tvtime and the Linux 2.6 scheduler

[Oswald Buddenhagen]

On Mon, May 24, 2004 at 02:54:19AM +1000, Con Kolivas wrote:
> Your example of poor performance is one when the cpu performance is
> marginal to get exactly 30 fps processed and on the screen. The cpu
> overhead in 2.6 is slightly higher than 2.4 so a borderline case may
> be just pushed over. 
> 
"his" example is in fact mine. 2.4 ghz chew 25 fps. the total cpu load
is at 30-40% (depending on the selected deinterlacer algorithm).

> A program running as sched_fifo it will preempt absolutely everything 
> regardless of how it behaves.
>
errm ... right. i paid too little attention to this "tiny" detail.
*blush*

now i hacked tvtime to simply ignore v4l2 ... and guess what? it works
...
so the new theory is, that tvtime has some problem with v4l2 input
buffering ...

greetings

-- 
Hi! I'm a .signature virus! Copy me into your ~/.signature, please!
--
Chaos, panic, and disorder - my work here is done.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/