em0 NIC slow on 8.2-p1 amd64?

Mike Tancsa mike at sentex.net
Fri Jul 22 19:21:07 UTC 2011

On 7/22/2011 3:08 PM, Michael W. Lucas wrote:
> Basically the same.  I don't think it's disk.

Are you able to saturate the ethernet ?  Try something like


on the local ethernet and see if you can generate and receive a full
gigabit on the wire


> There's kern/152828 claiming a performance regression with em under
> 8.2, but I'm not sure if that is applicable to my system. I'd upgrade
> the kernel to test, but I'm not brave enough to downgrade the kernel
> to 8.0 for comparison. (I've never had good luck running an old kernel
> on a new userland.)
> ==ml

Mike Tancsa, tel +1 519 651 3400
Sentex Communications, mike at sentex.net
Providing Internet services since 1994 www.sentex.net
Cambridge, Ontario Canada   http://www.tancsa.com/

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