Re: [Xen-devel] windows domU disk performance graph comparing hvm vs stubdom vs pv drivers

[Daniel Stodden <daniel.stodden@xxxxxxxxxx>]

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?

> 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?

Daniel


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