Mailinglist Archive: opensuse (1213 mails)

[Per Jessen <per@xxxxxxxxxxxx>]

Hans Witvliet wrote:

> On Mon, 2012-04-02 at 19:18 +0200, Per Jessen wrote:
>
> > Okay, have just now replaced the 3c905B with a 3c905C - I'm still
> > getting overruns:
> >
> > Single highspeed download source - 100/minute.
> > Multiple concurrent downloads - 600-700/minute
> >
> > I'll try out an intel e100 card later, but I suspect the cards are
> > all fine.
>
> Ok Per,  your logic seems solid...
>
> So it appears that your (3C905b) board isn't defect.
> However, i presume there isn't much difference between the
> "-B" and the "-C" version.

One is called "Cyclone", the other one "Tornado".  They're handled by
the same driver. 

> So if you move towards a completely different vendor (different size
> of internal FIFO perhaps), like Intel, you still might see a
> difference.

Yes, that is the next step. I did replace the 3c905c with a tlan last
night, but I couldn't get to test it. 

> But could it be that your cpu can not handle that amount of IRQ's?
> (Wild guess, as 50Mbps isn't _that_ much ...)

Yes, that was also my first thought, but it doesn't make much sense. 
Does anyone know how to determine if that could be the reason?  Just to
eliminate that suspect.


-- 
Per Jessen, Zürich (10.9°C)

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