From: Andy Furniss <adf.lists@gmail.com>
To: lartc@vger.kernel.org
Subject: Re: Poor performance of ingress filter for separate VMs
Date: Fri, 10 May 2013 20:37:27 +0000 [thread overview]
Message-ID: <518D5A87.7060503@gmail.com> (raw)
In-Reply-To: <000f01ce4c17$76dfa490$649eedb0$@JAMMConsulting.com>
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.
next prev parent reply other threads:[~2013-05-10 20:37 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-05-08 18:11 Poor performance of ingress filter for separate VMs Neil Aggarwal
2013-05-09 10:17 ` Andy Furniss
2013-05-09 11:00 ` Andy Furniss
2013-05-10 16:45 ` Neil Aggarwal
2013-05-10 20:37 ` Andy Furniss [this message]
2013-05-10 23:40 ` Neil Aggarwal
2013-05-11 11:41 ` Andy Furniss
2013-05-11 14:59 ` Neil Aggarwal
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