From mboxrd@z Thu Jan  1 00:00:00 1970
From: Andy Furniss <adf.lists@gmail.com>
Date: Fri, 10 May 2013 20:37:27 +0000
Subject: Re: Poor performance of ingress filter for separate VMs
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To: lartc@vger.kernel.org

Neil Aggarwal wrote:
> Andy:
>
>> turn off any sort of offload for the virtual device with ethtool and see
>> if that helps.
>
> When I go to the host and type:
> ethtool -k v1262
>
> It gives me this output:
>
> Offload parameters for v1262:
> rx-checksumming: on
> tx-checksumming: on
> scatter-gather: on
> tcp-segmentation-offload: on

> Any other ideas?

Ahh, tso will also need to be turned off if you want to see normal/real 
sized packets.

I don't know if it will help your specific problem, but generally now I 
see it's on for virtual devices I think turning off will be better than 
using a large mtu with policers just to to avoid dropping too much at once.

If it doesn't help then see what's going on with tcpdump.