RE: Windows SMP

["Venefax" <venefax@gmail.com>]

Dear Gentlemen
I have a machine with Intel 7350, 4 quad core. I can test since I have two
virtual machines with 8 vcpus, showing a gross overhead that makes them
unsuited for business. I use SLES 10 SP2, and I don't know how to apply the
patch, but if somebody can log in and apply it, we can see the results
immediately. The issue is affecting me directly. My two VM's have a VOIP
application, very intensive in network and CPU usage.
Federico
-----Original Message-----
From: Keir Fraser [mailto:keir.fraser@eu.citrix.com] 
Sent: Wednesday, December 31, 2008 5:10 AM
To: Andrew Lyon
Cc: Venefax; James Harper; Dirk Utterback; xen-devel@lists.xensource.com
Subject: Re: [Xen-devel] Windows SMP

On 31/12/2008 10:08, "Andrew Lyon" <andrew.lyon@gmail.com> wrote:

> 
> Thanks Keir, I added a couple of printk's as you suggested and I can
> now see if the feature is supported:
> 
> Intel(R) Xeon(R) CPU           E5420  @ 2.50GHz = (XEN) APIC Access
> virtualized
> Intel(R) Core(TM)2 CPU          6600  @ 2.40GHz = (XEN) APIC Access
emulated
> 
> I didnt expect my Xeon system to support it, I've read some pdf's
> about Intel virtualizaton features and they seemed to suggest it was a
> new feature on 7xxx Xeons.
> 
> The results fit the performance I've seen, a windows xp 32 bit hvm
> with 2 cpu's runs a lot faster on the Xeon 2.5 than on the Core 2.4.

I think it is probably worth printing out. I'll add a patch to xen-unstable.

 Thanks,
 Keir