RTAI on Xilinx PPC board ML403

[Paolo Mantegazza]

wicky.zhang wrote:
> 
> ----- Original Message ----- From: "Paolo Mantegazza" 
> <mantegazza at aero.polimi.it>
> To: "wicky.zhang" <wicky.zhang at gmail.com>
> Cc: <rtai at rtai.org>
> Sent: Thursday, January 19, 2006 4:58 PM
> Subject: Re: RTAI on Xilinx PPC board ML403
> 
> 
>> wicky.zhang wrote:
>>
>>> Hi all,
>>>
>>> I have successfully setup a system based on RTW/Comedi/RTAI/ on PC with
>>> a general DAQ card and it works well, but the performance can't reach my
>>> requirements. The corresponding info can be read in the following url:
>>>
>>> https://mail.rtai.org/pipermail/rtai/2006-January/013726.html
>>>
>>> I think there must be something wrong in my work, because in my lab,
>>> codes autogenerated from a Dspace system ( based on PPC+RTOS )
>>> can work well at 10KHz with 16 channel A/D. I can't realize the obvious
>>> performance difference between my system ( based on AMD XP2500 + linux
>>> RTAI ) and the Dspace system ( based on PPC + RTOS ). Certainly, the PPC
>>> is a RICS processor and xp2500 is a CISC processor, is this the key
>>> factor? i don't think so. What's wrong with me?
>>>
>>
>> DSPACE can be beated, the problem is not RTAI/Linux or RISC/CISC is the
>> way you acquire from your card.
>> It is there that DSPACE has an edge.
> 
> 
> Sorry, what's the meanning of this sentence? i can't understand it 
> because of my poor english.
> 

Just to be clearer: you cannot go too fast if you are using RTAILab with 
COMEDI data read and write.

Paolo.