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

[<admin@xxxxxxxxxxx>]

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.

-----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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