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Date:      Mon, 24 Jan 2005 11:14:26 +1100
From:      Peter Jeremy <PeterJeremy@optushome.com.au>
To:        Stefan =?iso-8859-1?Q?E=DFer?= <se@FreeBSD.org>, freebsd-stable@FreeBSD.org
Subject:   Re: NIC card problems....
Message-ID:  <20050124001425.GD241@cirb503493.alcatel.com.au>
In-Reply-To: <20050123232738.GA78226@StefanEsser.FreeBSD.org>
References:  <20050123135753.14384@mail.net-virtual.com> <20050123232738.GA78226@StefanEsser.FreeBSD.org>

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On Mon, 2005-Jan-24 00:27:38 +0100, Stefan Eßer wrote:
>The TX threshold messages issued by the dc driver appear more as an
>indication that the PCI bus is under severe load, than as a hint that
>the dc driver is causing the reboots, IMHO.

Under Tru64, I've seen Tulip cards report backoff to 1024 byte FIFO and
then switching to store-and-forward.  That's about 100µsec latency and
nothing should be holding the PCI bus that long.  I am inclined to
believe that something is stuffed in the PCI interface logic in the NIC.

-- 
Peter Jeremy



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