Messages in this thread | | | Date | Sun, 23 May 2004 23:03:13 +0200 | From | Oswald Buddenhagen <> | Subject | Re: tvtime and the Linux 2.6 scheduler |
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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
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