Re: [Xen-users] slow network with gplpv drivers in vlan setup

[Matthieu Patou <mat+Informatique.xen@xxxxxxxxx>]

On 11/02/2010 15:29, James Harper wrote:
> > Looks pretty the same.
> >      
> Yes, identical, just like you said they were :)
>
>    
> > I'm wondering if you have an idea to fix the problem on the dell
> > workstation, or maybe how the ethtool -k/-i should looks like in order
> > to have chance for offloading to work.
> >
> >      
> No vlan's on the dell? Some offload implementations are just broken, either on 
> the firmware or the driver. Some have limitations that the driver doesn't 
> understand (eg no offload when a vlan is in use). Just turn off the offload.
I also have vlan on the dell (that's how I witnessed the problem one 
more time and that I find that scatter/gather help with the transfer speed).
Thing is that I have roughly ~6/7MB per second in speed transfer in this 
case, which is not too bad but for a 1Gbit adapter it well bellow its 
capacities.
> If there are vlan's on the dell then get back to me and I might be able to 
> suggest a few things.
>
>    
Thanks.

Matthieu.

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