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Re: [Xen-devel] Windows SMP

To: "Tian, Kevin" <kevin.tian@xxxxxxxxx>, 'James Harper' <james.harper@xxxxxxxxxxxxxxxx>, Wei Huang <wei.huang2@xxxxxxx>
Subject: Re: [Xen-devel] Windows SMP
From: Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
Date: Wed, 31 Dec 2008 09:46:07 +0000
Cc: "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, Dirk Utterback <dirk.utterback@xxxxxxxxx>, Venefax <venefax@xxxxxxxxx>
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On 31/12/2008 08:50, "Tian, Kevin" <kevin.tian@xxxxxxxxx> wrote:

>> different. I can do that without too much fuss but if there is
>> something
>> faster then even better.
> If you compare to VM-exit overhead for every TPR access, above
> is already far far faster. Of course fewer memory accesses used
> in inserted lines, less overhead you'll see then.:-)

It'll be plenty good enough, as you'll be saving probably on the order of
5000 cycles by not exiting and emulating. You'll be hard pushed to be worse
than 5% of that.

 -- Keir

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