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RE: [Xen-devel] [RFC][Patches] Xen 1GB Page Table Support

To: "Gianluca Guida" <gianluca.guida@xxxxxxxxxxxxx>, "George Dunlap" <George.Dunlap@xxxxxxxxxxxxx>
Subject: RE: [Xen-devel] [RFC][Patches] Xen 1GB Page Table Support
From: "Huang2, Wei" <Wei.Huang2@xxxxxxx>
Date: Fri, 20 Mar 2009 13:32:58 -0500
Cc: Tim Deegan <Tim.Deegan@xxxxxxxxxxxxx>, Gianluca Guida <glguida@xxxxxxxxx>, Dan Magenheimer <dan.magenheimer@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxx, Keir Fraser <Keir.Fraser@xxxxxxxxxxxxx>
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Thread-topic: [Xen-devel] [RFC][Patches] Xen 1GB Page Table Support
I am working on collecting the numbers. Dan, does Oracle have any
database benchmarks?


-----Original Message-----
From: Gianluca Guida [mailto:gianluca.guida@xxxxxxxxxxxxx] 
Sent: Friday, March 20, 2009 1:17 PM
To: George Dunlap
Cc: Gianluca Guida; Dan Magenheimer; Tim Deegan; Huang2, Wei;
xen-devel@xxxxxxxxxxxxxxxxxxx; Keir Fraser
Subject: Re: [Xen-devel] [RFC][Patches] Xen 1GB Page Table Support

Gianluca Guida wrote:
> George Dunlap wrote:

>> It might be nice to have some quick "sanity check" benchmarks, just
>> make sure that adding the 1G pages won't hurt performance for the
>> case...
> Might do it, but I don't think it's necessary.

What I meant here is: checking that shadow performance hasn't decreased 
shouldn't be necessary. It should be still worth, though, if we'd get 
the kind of improvements this patch has on HAP.

Any numbers?


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