WARNING - OLD ARCHIVES

This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
   
 
 
Xen 
 
Home Products Support Community News
 
   
 

xen-devel

[Xen-devel] Re: performance regression from c/s 21647:cfba1560054a

To: Jan Beulich <JBeulich@xxxxxxxx>
Subject: [Xen-devel] Re: performance regression from c/s 21647:cfba1560054a
From: Gianluca Guida <glguida@xxxxxxxxx>
Date: Thu, 10 Nov 2011 07:04:14 -0800
Cc: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>, Tim Deegan <tim@xxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, Gianluca Guida <gianluca.guida@xxxxxxxxxx>
Delivery-date: Thu, 10 Nov 2011 07:29:22 -0800
Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type:content-transfer-encoding; bh=j9N2/XzQdqkHx/5FQ+8Hk/w/KJAVjhQ8hNCjlYEWW5M=; b=XTLlfZe3IQNz8EJ8c1uPxB+y5bDtv9Lv3YWcd4aE5+uU6znGp1mpSjenbb8Nzc90UD BNRdiospip3GmsWJT6Wn5VdTybjx0RLlCEt1BZt0DFr1Yr3s1peOy4oOSNFK7eX5JToS WptrK3ftRa/ewzoUBVwNuBHRsnhv8t6ADbWys=
Envelope-to: www-data@xxxxxxxxxxxxxxxxxxx
In-reply-to: <4EBBF36A0200007800060375@xxxxxxxxxxxxxxxxxxxx>
List-help: <mailto:xen-devel-request@lists.xensource.com?subject=help>
List-id: Xen developer discussion <xen-devel.lists.xensource.com>
List-post: <mailto:xen-devel@lists.xensource.com>
List-subscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe>
References: <4EBBC25B02000078000601F1@xxxxxxxxxxxxxxxxxxxx> <CAKpvNa3DmeQyXBb7obc_PbsNaEUBLjTFc_eLkTKH8RwYs4WQYw@xxxxxxxxxxxxxx> <4EBBF36A0200007800060375@xxxxxxxxxxxxxxxxxxxx>
Sender: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
On Thu, Nov 10, 2011 at 6:53 AM, Jan Beulich <JBeulich@xxxxxxxx> wrote:
> It's not so much about making me feel good, but about understanding
> what the reasons for the change were (and hence whether perhaps
> some heuristic would better be used to determine whether higher
> level page tables are worth getting unshadowed earlier). After all I
> also don't want reverting this to result in a performance regression in
> Windows guests.

I will try to set up an environment to test the effects on Windows
guest. Unfortunately I forgot the details and lost the notes I took
when developing that patch. Sorry about this.

Gianluca

-- 
It was a type of people I did not know, I found them very strange and
they did not inspire confidence at all. Later I learned that I had been
introduced to electronic engineers.
                                                  E. W. Dijkstra

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel