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Re: e1000 driver problem with Intel Pro/1000 MT adapter

To: sfeldma@xxxxxxxxx
Subject: Re: e1000 driver problem with Intel Pro/1000 MT adapter
From: Ben Greear <greearb@xxxxxxxxxxxxxxx>
Date: Sun, 05 Dec 2004 00:37:19 -0800
Cc: Jos Vos <jos@xxxxxx>, netdev@xxxxxxxxxxx
In-reply-to: <1102204801.3343.68.camel@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>
Organization: Candela Technologies
References: <200412032325.iB3NPdG04693@xxxxxxxxxxxxx> <1102204801.3343.68.camel@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>
Sender: netdev-bounce@xxxxxxxxxxx
User-agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.7.3) Gecko/20041020
Scott Feldman wrote:
On Fri, 2004-12-03 at 15:25, Jos Vos wrote:

I have a problem with an Intel Pro/1000 MT 4-port card in a Supermicro
(non-HT) Pentium 4 system using RHEL3 (2.4.21 kernel "the RH way") with
the e1000 driver (I tried both the version supplied by RH and the
newest 5.5.4 driver):


The 4-port card has two 82546 dual-port controllers behind a PCI-X
bridge.  Your symptoms suggest interrupt routing didn't get setup
correctly for the controllers behind the bridge.  I've seen more than
one case where the BIOS gets this wrong.  The fix is to upgrade to the
latest BIOS.  Hopefully this is the fix for you.  :-)

For what it's worth, I've had good luck with a 4-port pro/1000 NIC
in a SuperMicro X5-DPAGG (dual xeon, PCI-X) motherboard.  I've tried it with 
kernel
2.4.27 and 2.6.9 so far...  For maximum performance, I needed to increase
the tx and rx descriptors to 2k, I believe this helps mitigate the extra
latency caused by the PCI-X bridge on the NIC...

Ben


-scott



--
Ben Greear <greearb@xxxxxxxxxxxxxxx>
Candela Technologies Inc  http://www.candelatech.com


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