Re: [Xen-users] iozone on HVM guest

[Pasi Kärkkäinen <pasik@xxxxxx>]

On Wed, Dec 05, 2007 at 09:48:52AM +0200, Ofek Doron [Ofek BIZ] wrote:
> Hi all,
> 
> 
> I am looking for information / results of iozone in a linux HVM based 
> guest.
> I tried google but didn't find .
> Does anyone have a link (or file) to such kind of information ?
> 
> also, looking for objective information about I/O performance in a 
> paravirtual guest vs. HVM based guest.
> 

Some results with Oracle OLTP workload:

http://www.redhatmagazine.com/2007/11/20/red-hat-enterprise-linux-51-utilizes-nested-paging-on-amd-barcelona-processor-to-improve-performance-of-virtualized-guests/

Some other workloads might and will be different.

PV guest is 91% of the baremetal speed, and HVM guest _with_ PV drivers
(important!) is 75% of the speed of baremetal.

HVM guest performance without PV drivers will be sucky, so make sure you're
using them. 

-- Pasi

_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-users