Re: windows domU disk performance graph comparing hvm vs stubdom vs pv drivers

[Keith Coleman <list.keith@scaltro.com>]

On Fri, Feb 19, 2010 at 7:08 PM, Daniel Stodden
<daniel.stodden@citrix.com> wrote:
> On Fri, 2010-02-19 at 17:41 -0500, Keith Coleman wrote:
>
>> This graph shows the performance under a webserver disk IO workload at
>> different queue depths. It compares the 4 main IO methods for windows
>> guests that will be available in the upcoming xen 4.0.0 and 3.4.3
>> releases: pure HVM, stub domains, gplpv drivers, and xcp winpv
>> drivers.
>
> Cool, thanks. If I may ask, what exactly did you run?

iometer

>> The gplpv and xcp winpv drivers have comparable performance with gplpv
>> being slightly faster. Both pv drivers are considerably faster than
>> pure hvm or stub domains. Stub domain performance was about even with
>> HVM which is lower than we were expecting. We tried a different cpu
>> pinning in "Stubdom B" with little impact.
>
> Is this an SMP dom0? A single guest?

Dual core server with dom0 pinned to core 0 and a single domU pinned
to core 1. Stubdom was pinned to core 0 then core 1.


Keith Coleman