On Dec 27, 2010, at 21:33 , Boris Derzhavets wrote:

> I have installed Xen 4.0.1 Dom0 (2.6.32.26 pvops kernel) on top of SL6
> (alpha 3) . Performance for F14 & Ubuntu 10.10 Desktop KVM guests (@ 
> QEMU
> Instance dual booting with Xen Host on the same box) is almost
> the same as for same paravirtual guests at Xen 4.0.1 Dom0. 

Thanks for the data point. "Almost" means "not quite on par", right? That's my impression as well. Network latency seems to be significantly higher (throughput is really good, though) and I/O at least not better than with the SL5 Xen (yes, I'm using virtio net/disk devices and bridged networking).

> However, Solaris Express install as KVM is extremely slow vs Solaris Expr
> ess
> install as PV Guest at Xen 4.0.1 Dom0 with mentioned kernel.

I've had no urge to install Solaris for a while, and that hasn't changed with the recent events ;-) But I take it the  Solaris express install is using the emulated devices under KVM?

- Stephan

> The last
> one has been rebuilt via Michael's Young 
> kernel-2.6.32.26-174.xendom0.fc12.src.rpm . View for instance my notes at
> 
> http://bderzhavets.wordpress.com/2010/11/29/rebuild-kernel-2-6-32-26-174-
> xendom0-fc12-src-rpm-on-rhel-server-6/
> 
> Boris

-- 
Stephan Wiesand
DESY -DV-
Platanenenallee 6
15738 Zeuthen, Germany