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Re: [Xen-devel] Xen3 domU network packet loss (udp iperf)

from [Pasi Kärkkäinen]

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Subject:	Re: [Xen-devel] Xen3 domU network packet loss (udp iperf)
From:	Pasi Kärkkäinen <pasik@xxxxxx>
Date:	Tue, 21 Mar 2006 09:50:40 +0200
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And you won't notice this packet loss with TCP, because TCP automatically
re-transmits the missing packets.. TCP speed does suffer, however.

Others seeing this?

- Pasi

On Sat, Mar 18, 2006 at 03:04:13PM +0200, Pasi Kärkkäinen wrote:
> Hi!
> 
> Please check out this URL: http://nrg.joroinen.fi/xen-ploss.txt
> 
> There you have UDP iperf results to and from domU and dom0.
> 
> It seems xen causes packet loss to domU's.. dom0 works well without packet
> loss.
> 
> Is this known problem? I'm using bridged networking with xen.
> 
> Both the xen box, and the external non-xen box were P4 3.0+ GHz, using
> gigabit NIC's (tg3 and e1000).
> 
> in the xen box, all the physical network interfaces (tg3) have rx and tx 
> checksumming on.
> 
> I'm using xen 3 unstable from 2006-02-04.
> 
> -- Pasi
> 

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