Re: massive performance drop after a while when using virtio nics

Yann Dupont
2008-09-08T13:33:22Z

Fabian Deutsch a écrit :
>> We just saw the very same issue.
>> guest & host : 2.6.25.3, debian etch 64 bits
>>
>>
...
>
> Are you also using model=vortio?
> If so, you might want to switch to e1000. Less performance but stable.
>
> The issues seems to be related to virtio/tap.
> And a little bit more to the tap itnerface/implementation, because of
> the reboot-observation.
>
> fabian
>
>
Yes it is virtio.
e1000 works but it is pure emulation, so :
Less performance
More CPU usage.

This server is in pre-prod right now, So I'd rather try to help
debugging the issue for the moment.

greetings,

--
Yann Dupont - Service IRTS, DSI Université de Nantes
Tel : 02.51.12.53.91 - Mail/Jabber : Yann.Dupont@univ-nantes.fr