RTAI-3.1 as pwm - performance question

[Gilles Chanteperdrix]

Jakub Mikolaj Lamik wrote:
 > Problems are appearing when I'm heavily overloading my system  (i.e.
 > building kernel 
 > with "make -j" option, using VNC etc.). I can observe jitter which is up
 > to 20 us. 

You are not overloading your system heavily enough or not running your
test long enough, try and run :

while :; do dd if=/dev/zero of=/tmp/foo bs=1M count=500; sync; rm /tmp/foo; done

the jitter should go beyond 40 us.

-- 


					    Gilles Chanteperdrix.