Re: [Xen-users] Xen vs VMWare comparison paper

[<admin@xxxxxxxxxxx>]

GPLPV is an optimized driver.  

-----Original Message-----
From: xen-users-bounces@xxxxxxxxxxxxx
[mailto:xen-users-bounces@xxxxxxxxxxxxx] On Behalf Of Andrew Bobulsky
Sent: Thursday, May 24, 2012 11:53 AM
To: admin@xxxxxxxxxxx
Cc: xen-users@xxxxxxxxxxxxx
Subject: Re: [Xen-users] Xen vs VMWare comparison paper

Hello Admin,

On Wed, May 23, 2012 at 1:11 PM,  <admin@xxxxxxxxxxx> wrote:
> I'm guessing that the benchmarks were run without any optimized drivers
for
> Windows under Xen.  That would be the only way to explain the dismal
> performance.  Windows is known to perform poorly under Xen if you simply
> install Windows and don't install optimized drives.  In all fairness,
> Windows performs poorly on native hardware if you don't install optimized
> drivers, so testers should expect to have to install optimized drivers
when
> testing Windows regardless of the environment.  I have emailed them about
> this, and I will post anything I hear back from them.

I'm rather curious here because you said "optimized drivers" rather
than saying "GPLPV."  Is there a choice of [better than stock] drivers
for a Windows HVM DomU that I'm not aware of?  I ask because GPLPV
doesn't quite work for me yet in all situations.

Regards,
Andrew Bobulsky


> -----Original Message-----
> From: xen-users-bounces@xxxxxxxxxxxxx
> [mailto:xen-users-bounces@xxxxxxxxxxxxx] On Behalf Of James Harper
> Sent: Tuesday, May 22, 2012 8:03 PM
> To: xen-users@xxxxxxxxxxxxx
> Subject: [Xen-users] Xen vs VMWare comparison paper
>
> One of my customers handed me a copy of this paper and asked why are we
> using xen if it is so slow...
>
> http://morse.colorado.edu/~tlen5710/12s/VMware.pdf
>
> which is a fairly damning report of performance under Xen in comparison to
> VMWare, citing worse than 50% overhead of Xen in comparison to physical.
>
> Has anyone seen this paper before?
>
> James
>
>
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>
>
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