Date: Mon, 24 Jan 2005 10:50:55 +0100 From: Wilko Bulte <wb@freebie.xs4all.nl> To: Peter Jeremy <PeterJeremy@optushome.com.au> Cc: freebsd-stable@freebsd.org Subject: Re: NIC card problems.... Message-ID: <20050124095055.GC40050@freebie.xs4all.nl> In-Reply-To: <20050124001425.GD241@cirb503493.alcatel.com.au> References: <20050123135753.14384@mail.net-virtual.com> <20050123232738.GA78226@StefanEsser.FreeBSD.org> <20050124001425.GD241@cirb503493.alcatel.com.au>
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On Mon, Jan 24, 2005 at 11:14:26AM +1100, Peter Jeremy wrote.. > 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. According to my Tru64 colleagues not all Tulip chip versions are born equal, some are better than others. I do not have more detail here. -- Wilko Bulte wilko@FreeBSD.org
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