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Re: [Xen-devel] Windows SMP

To: Andrew Lyon <andrew.lyon@xxxxxxxxx>
Subject: Re: [Xen-devel] Windows SMP
From: Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
Date: Wed, 31 Dec 2008 10:10:06 +0000
Cc: James Harper <james.harper@xxxxxxxxxxxxxxxx>, Dirk Utterback <dirk.utterback@xxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxx, Venefax <venefax@xxxxxxxxx>
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On 31/12/2008 10:08, "Andrew Lyon" <andrew.lyon@xxxxxxxxx> 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



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