netdev - Re: [RFC PATCH V2] New Xen netback implementation

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Message-ID: <1327936037.26983.241.camel@zakaz.uk.xensource.com>
Date:	Mon, 30 Jan 2012 15:07:16 +0000
From:	Ian Campbell <Ian.Campbell@...rix.com>
To:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
CC:	"Wei Liu (Intern)" <wei.liu2@...rix.com>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"xen-devel@...ts.xensource.com" <xen-devel@...ts.xensource.com>,
	David Vrabel <david.vrabel@...rix.com>,
	Paul Durrant <Paul.Durrant@...rix.com>
Subject: Re: [RFC PATCH V2] New Xen netback implementation

On Fri, 2012-01-27 at 19:22 +0000, Konrad Rzeszutek Wilk wrote:
> 
>  - This patch set solves the CPU banding problem I've seen with the
>    older netback. The older one  I could see X netback threads eating
> 80%
>    of CPU. With this one, the number is down to 13-14%. 

"CPU banding problem"?

If you had X threads using 80% before do you now see Y threads using
13-14% where Y is bigger or smaller than X? Is 80*X ~= 13*Y?

Ian.

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