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Date: Sat, 30 Jan 2016 02:23:58 +0100
From: Marius Strobl <marius@alchemy.franken.de>
To: Mike Tancsa <mike@sentex.net>
Cc: Harry Schmalzbauer <freebsd@omnilan.de>,
 FreeBSD-STABLE Mailing List <freebsd-stable@freebsd.org>
Subject: Re: possible em regression (was Re: svn commit: r294958 - in
 stable/10: share/man/man4 sys/dev/e1000 sys/dev/ixgb sys/dev/netmap)
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On Fri, Jan 29, 2016 at 03:41:57PM -0500, Mike Tancsa wrote:
> 
> No multi queue. Stock GENERIC kernel with a couple of things removed.
> hw.em are just the defaults. I will try without TSO
> 
> % ifconfig em0
> em0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
> 
> options=4209b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,WOL_MAGIC,VLAN_HWTSO>
> 

Hrm, that's strange, TSO4 should be enabled by default so apparently
you are already disabling it; what is the behavior if you turn it on?
Do you use a < Gigabit link?

Marius