linux-kernel - Re: smp and irq conflict

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Date:	Wed, 14 Feb 2007 11:45:53 -0500
From:	Bill Davidsen <davidsen@....com>
To:	Benny Amorsen <benny+usenet@...rsen.dk>
CC:	linux-smp@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: smp and irq conflict

Benny Amorsen wrote:
>>>>>> "BD" == Bill Davidsen <davidsen@....com> writes:
>>>>>>             
>
> BD> You may be able to move one board to another slot, but looking at
> BD> the bandwidth I suspect you may need a server motherboard with
> BD> multiple busses, preferably running at 66MHz 64bit. I don't think
> BD> this is a interrupt problem, but you can just try capture on two
> BD> channels which share an interrupt, like bttv0 and bttv7 to verify
> BD> that.
>
> 66MHz 64bit isn't much fun when the capture cards are 33MHz 32bit.
>
>   

It doesn't help the video to bus, but multiple busses to give a bus per 
card would help, and assuming the data are being saved to disk using a 
decent disk controller which can use the additional bandwidth, at least 
some conflict is avoided or reduced.

This is really a case of using general hardware to the utmost, I suspect 
more m/b bandwidth will be needed somewhere.

-- 
bill davidsen <davidsen@....com>
  CTO TMR Associates, Inc
  Doing interesting things with small computers since 1979

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