smp & rtlinux

["alexander w. fiedel" <alexander.w.fiedel@web.de>]

hi.
we are actually thinking about using a dual cpu system to reduce the cpu load and to have more time for planed comminucation.
but I do have no idea about pci access with 2 cpus.
We were thinking of using one cpu for getting data from a adc card, doing some calculations and writing something back to a dac (this works fine).
 The other cpu can be used for  network communication or is free for linux control things.  -- we want to control (and observe) our rtlinux controller from outside (i.e. via network or local console).
Has anybody experience with that? - With network communication there would be eccessive pci usage (we get data every 50us and have to do 8 reads to get all the data from out a/d). Maybe this 2 cpus would block themselves with pci bus accesses.
We were thinking about that because we get every 50us data and a/d + control + d/a takes 35us... so there is not much spare time for additional gimmicks...

thanks in advance 
alexander fiedel


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