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

[Marco Sinhoreli <msinhore@xxxxxxxxx>]

Hi Keith,

Do you have some KVM graph? It will be interesting to compare both.

Cheers

On Tue, Feb 23, 2010 at 4:39 PM, Pasi Kärkkäinen <pasik@xxxxxx> wrote:

On Tue, Feb 23, 2010 at 09:44:24AM -0500, Konrad Rzeszutek Wilk wrote:
> > > > That is strange because in that configuration I get a far better
> > > > disk bandwidth with stubdoms compared to qemu running in dom0.
> > > >
> > >
> > > What type of test are you doing?
> > >
> >
> > these are the results I got a while ago running a simple "dd if=/dev/zero
> > of=file" for 10 seconds:
>
> Keep in mind that iometer (both the Windows a Linux version) by default
> do random seak of 50% reads and 50% writes. They do have some set of
> templates - "web server", "file server", "database server" that change
> the read/write ratio, size of blocks, and the queue length.(fyi, you can
> use fio to set the same values, if you can't get dynamo to compile on
> your Linux box).
>

Does iometer run correctly on Linux nowadays? I remember it having problems
with more than 1 outstanding IO..

-- Pasi

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--
Marco Sinhoreli

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