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Re: [Xen-devel][PATCH][RFC] Supporting Enlightened Windows2008Server

>>> On Mon, Apr 7, 2008 at 12:16 PM, in message
<C420076F.1EE11%keir.fraser@xxxxxxxxxxxxx>, Keir Fraser
<keir.fraser@xxxxxxxxxxxxx> wrote: 
> On 7/4/08 15:28, "Ky Srinivasan" <ksrinivasan@xxxxxxxxxx> wrote:
>> I do. On the NetBench runs we did, we were seeing close to 10% improvement. 
> I
>> will keep you posted on other benchmark results as they become available.
> I forgot to ask in my previous email what the configuration was for this
> netbench test. For example, was it a UP or SMP guest? Where did the netbench
> clients run? Did you run with PV drivers?

The server was a UP windows 2008 server guest. I suspect SMP numbers may 
actually show more of an improvement. The clients were run on physical 
machines. We used our PV drivers for windows (2008 server) to maximize the I/O 

> The latter is particularly relevant, as measuring I/O performance of an HVM
> guest without PV I/O drivers is particularly useful. Unfortunately I'm not
> sure whether anyone has got the GPL PV drivers working with Server 2008 as
> yet. But if not that would seem a more useful step towards w2k8 performance
> than Viridian emulation, imo. I bet if you compare XP performance on
> netbench with versus without the GPL PV drivers, the difference is more than
> 10%!

Agreed; without the PV drivers, it does not make any sense to run NetBench. We 
have PV drivers that work with Windows 2008 server.


K. Y
>  --   Keir
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