scheduler

[Michel Doyon <doyon@dsm.space.gc.ca>]

I have a question regarding the scheduler.

Can any one explain to me or give me directions where to find the
following:


If I have 2 RT threads running at 2 different rates, how does the
scheduler controls the calling of my tasks at the right rate ... I assume
that it sets a sotf timer generating an interrupt or does it do polling ?

If you can place a timer card in the machine and program it such that it
generates an IRQ at a given rate, how does the performance compares to the
soft timer (rtl_make_periodic) in terms of load to the CPU ? Response time
?

Thank you
Michel



-----------------------------------
Michel Doyon, M.Eng.
Senior STVF Control Engineer
Canadian Space Agency
6767 route de l'aeroport
St-Hubert (Quebec)
J3Y 8Y9 - CANADA
Tel.:  (450) 926 4679 - Fax :  (450) 926 4695
doyon@dsm.space.gc.ca