Re: [Xen-devel] Strange lag with pv_ops dom0 kernel

[Valtteri Kiviniemi <valtteri.kiviniemi@xxxxxxxxxxxx>]

Hi,

I dont think that's the case because the nic is autonegotiation the link 
and in dmesg I can see right after boot:
eth0: Link is Up 100 Mbps Full Duplex, Flow Control: None
eth0: 10/100 speed: disabling TSO

- Valtteri Kiviniemi

Christophe Saout kirjoitti:
> Hi Valtteri,
>
> > I'm testing the 2.6.30-rc3-tip pv_ops kernel with Xen 3.4 (also tried 
> > 2.6.30-rc5-tip) and everything is working fine except domU performance.
> > domU's boot up quickly but theres some strange lag. For example just 
> > typing "ps aux" or "dmesg" takes 5-10 seconds to finish. Load averages 
> > are 0 and cpu-usage reported by xentop is minimal. Theres also no 
> > indication of io-wait.
> This sounds like the known issue with Dom0 bouncing TSO packets.  It
> should go away once you disable TSO in your DomU's:
>
> /usr/sbin/ethtool -K eth0 tso off
>
>
>         Christophe
_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel