device polling on SMP box

[Lucas Holt]

There is an assumption that it would be faster to have 2 cpus process 
the interupts than to use polling which can run on one processor at a 
time.  On my system, it appears to be faster to use polling.  I have a 
dual xeon 2.0 ghz.


On Nov 15, 2004, at 5:57 AM, Axel S. Gruner wrote:

> Hi.
>
> I am just wondering why "options DEVICE_POLLING" is not possible with
> a SMP-Kernel.
> Well, i know that there is a workaround with
> "/usr/src/sys/kern/kern_poll.c" which works perfectly building a SMP
> Kernel with polling.
> My question is, are there any known problems with SMP+polling or why is
> it not possible by default?
>
> asg
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Lucas Holt
Luke at FoolishGames.com
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