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Date:      Tue, 6 May 2003 19:25:24 +0200
From:      "Simon L. Nielsen" <simon@nitro.dk>
To:        "Jin Guojun [NCS]" <j_guojun@lbl.gov>
Cc:        hardware@freebsd.org
Subject:   Re: Intel GigE and copper PHY supported?
Message-ID:  <20030506172523.GE428@nitro.dk>
In-Reply-To: <3EB7EBB6.3038C32E@lbl.gov>
References:  <BADD2D59.2C6B6%joe@via.net> <3EB7EBB6.3038C32E@lbl.gov>

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On 2003.05.06 10:07:03 -0700, Jin Guojun [NCS] wrote:
> joe mcguckin wrote:
>=20
> > I'd like to use the TYAN Trinity GC-SL motherboard with on-board GigE
> > (copper). Does anyone know if this is supported? Has anyone used this b=
oard
> > with 4.X?
> >
> > Thanks,
>=20
> Do not have direct use of this motherboard. We have some similar M/Bs
> from SuperMicro (same chipset and same GigE NICs).
>=20
> General M/B performance is good. The GigE is not too pleasure.
> The Incoming TCP is about 350 Mb/s, and out going TCP is only 270,
> which is limited by interrupt (98% CPU -- 2.8 GHz -- used for interrupt).
> Either the driver or the Intel NIC is not functioning properly, but we do=
 not
> have time to investigate.

If this the chips a using the em(4) driver you can try turning on
interrupt coalation (or whatever Intel calls it). It can (AFAIR) only be
done by modifying sys/dev/em/if_em.h. Just note the warning about why it
was disabled.

--=20
Simon L. Nielsen

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