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SubjectRE: Gigabit/SMP performance problem
Date
All,

We (Intel - LAN Access Division, e1000 driver) are taking a look at what is
going on here. We don't have any data yet but we'll keep you posted on what
we find.

Thanks for your patients.

Cheers,
John



> -----Original Message-----
> From: Robert Olsson [mailto:Robert.Olsson@data.slu.se]
> Sent: Tuesday, January 07, 2003 10:16 AM
> To: Avery Fay
> Cc: Anton Blanchard; linux-kernel@vger.kernel.org
> Subject: Re: Gigabit/SMP performance problem
>
>
>
> Avery Fay writes:
> > Hmm. That paper is actually very interesting. I'm thinking
> maybe with the
> > P4 I'm better off with only 1 cpu. WRT hyperthreading, I
> actually disabled > it because it make performance worse
> (wasn't clear in the original email).
>
>
> With 1CPU-SMP-HT I'm on UP level of performance this with
> forwarding two
> single flows evenly distributes between CPU's. So HT payed
> the SMP cost so
> to say.
>
> Also I tested the MB bandwidth with new threaded version of
> pktgen just
> TX'ing a packets on 6 GIGE I'm seeing almost 6 Gbit/s TX'ed
> w 1500 bytes
> packets.
>
> I have problem populating all slots w. GIGE NIC's. WoL (Wake
> on Lan) this
> is a real pain... Seems like my adapters needs a standby
> current 0.8A and
> most Power Supplies gives 2.0A for this. (Number come from
> SuperMicro).
> So booting fails radomlingy. You have 8 NIC's -- Didn't you
> have problem?
>
> Anyway I'll guess profiling is needed?
>
> Cheers.
> --ro
> -
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