hi res timer

Linux is not a hard realtime system, so you will find a jitter of _any_ size if you wait long enough and produce enough stress in the system.

If you want reliable timing you need to add something like RTAI.

-Michael

Which 2.6 kernel, there are several of them :) Is it saying "accuracy" or is it saying "precision?"

What do you get and what is your definition of "a lot" of jitter? What would be acceptable jitter for your situation?

I seem to recall that there can be three values for HZ now in a

2.6.mumble kernel (maybe that cam in .14?) 100, 250 and 1000 I wonder if running HZ at 1000 and perhaps playing with timeslices and such might get things going "well enough" without having to go all the way to what I think is RTAI?

rick jones

--
firebug n, the idiot who tosses a lit cigarette out his car window
these opinions are mine, all mine; HP might not want them anyway... :)

I was playing with .14 recently and saw it there. I'm not sure if it came any earlier, though.

--
echo izn@pwlvkqrw.nwv|tr zwvq aeto

If you don't mind that _sometimes_ the timing condition is not met, you are fine (2.6 is said to be a better _soft_realtime_ system than previous versions). But there is no guarantee.

-Michael