[Xen-devel] Re: Xen performance and Dbench

To:	"dan.magenheimer@xxxxxxxxxx" <dan.magenheimer@xxxxxxxxxx>
Subject:	[Xen-devel] Re: Xen performance and Dbench
From:	"Todd Deshane" <deshantm@xxxxxxxxx>
Date:	Thu, 7 Aug 2008 18:55:37 -0400
Cc:	"Xen-Devel \(E-mail\)" <xen-devel@xxxxxxxxxxxxxxxxxxx>, Anthony Liguori <anthony@xxxxxxxxxxxxx>
Delivery-date:	Thu, 07 Aug 2008 15:55:59 -0700
Dkim-signature:	v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:message-id:date:from:reply-to :to:subject:cc:in-reply-to:mime-version:content-type :content-transfer-encoding:content-disposition:references; bh=IIKnyAoK3OfP1O31K5ldBxrbajBVf65EStDs+aIWae8=; b=OrpBBwyauF6xXcHNjyQ66LS5RkYSzLGztvZ+7SSoxhpvAPk7ZP7qlmfdbUaIvgLQn7 7ESI9T0VTFlgIadfjkVgTWo2ISM+whEuA+ZyI4j3u6nvdr4mJz9l7/ZKvNAGz4e8qIfN TQLu+iBX8YI31aPeN8FLRDJlGMiLWP5qxbPGA=
Domainkey-signature:	a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:reply-to:to:subject:cc:in-reply-to :mime-version:content-type:content-transfer-encoding :content-disposition:references; b=WWXcLXWJa3n8eMy1yd1lFcKHKIX+l3tcQE98Z6OZzWD+LjBMMIFzq56s4FewbtEyNi KgxvmnFclEOYa2QpkMrybh+1n19G/lIGxrKX+LsVOQ1W6pz+aYDH5o9zohfhz3QlOuJ6 I8T1zyA7BzuHtNhJvrIeR3KQ6nJPHCtLvQKCg=
Envelope-to:	www-data@xxxxxxxxxxxxxxxxxxx
In-reply-to:	<20080807162325609.00000008444@djm-pc>
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:	<489B51DE.5020900@xxxxxxxxxxxxx> <20080807162325609.00000008444@djm-pc>
Reply-to:	deshantm@xxxxxxxxx
Sender:	xen-devel-bounces@xxxxxxxxxxxxxxxxxxx

On Thu, Aug 7, 2008 at 6:23 PM, Dan Magenheimer
<dan.magenheimer@xxxxxxxxxx> wrote:
> Thanks, Anthony, very illuminating.  However one would
> expect that the 1-cpu measurement would be about one-half
> of the 2-cpu measurement, not closer to one-fourth (27%),
> true?  So even if the methodology is bad, the results
> may still be indicating something wrong that should
> be looked at?
>
> Todd, the references you provide are several years and
> several versions of Xen old.  Have you seen any Xen
> dbench results on a more recent Xen version?  While
> I agree that dbench might not be the best benchmark
> in the world, if some customers use and believe it
> (or, worse, believe the OLS paper), it would be nice
> to be able to set the record straight.
>

I don't know of anything on dbench and Xen.

I don't think it would be too hard to try to re-run their Xen
dbench numbers. We could then not make the mistakes
that Anthony pointed out.

More investigation is definitely needed.

Cheers,
Todd

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

WARNING - OLD ARCHIVES

xen-devel

[Xen-devel] Re: Xen performance and Dbench