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Date: Mon, 25 Jan 2010 08:25:43 -0800
Message-ID: <147432021001250825p202914a7ka5a2c1d28d96bac3@mail.gmail.com>
From: Nick Rogers <ncrogers@gmail.com>
To: Lars Eggert <lars.eggert@nokia.com>
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Cc: Jason Chambers <jchambers@ucla.edu>,
	"stable@freebsd.org" <stable@freebsd.org>,
	"jfvogel@gmail.com" <jfvogel@gmail.com>
Subject: Re: em interface slow down on 8.0R
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I have not tried toying with any tcp sysctl. I'm not having performance
problems so much as the interface just stops working entirely, which I would
think has nothing to do with the TCP stack when layer 2 is not functioning?

I'll give it a shot if I can. For the moment I have had to switch to a
different (lower performance) network card to get things stable and I would
like to be aware of a more concrete driver fix in STABLE before switching
back my production machines.

On Mon, Jan 25, 2010 at 6:25 AM, Lars Eggert <lars.eggert@nokia.com> wrote:

> Hi,
>
> have you tried turning off TCP Segmentation Offloading (net.inet.tcp.tso
> sysctl)? That fixed performance issues with some em cards for me.
>
> Lars
>
>