From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
To: Ian Campbell <Ian.Campbell@citrix.com>
Cc: "Wei Liu (Intern)" <wei.liu2@citrix.com>,
"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
"xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>,
David Vrabel <david.vrabel@citrix.com>,
Paul Durrant <Paul.Durrant@citrix.com>
Subject: Re: [RFC PATCH V2] New Xen netback implementation
Date: Mon, 30 Jan 2012 10:21:09 -0500 [thread overview]
Message-ID: <20120130152109.GA17923@phenom.dumpdata.com> (raw)
In-Reply-To: <1327936037.26983.241.camel@zakaz.uk.xensource.com>
On Mon, Jan 30, 2012 at 03:07:16PM +0000, Ian Campbell wrote:
> 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?
Yes. ~=. The count looked to be the same.
>
> Ian.
next prev parent reply other threads:[~2012-01-30 15:23 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-01-17 13:46 [RFC PATCH V2] New Xen netback implementation Wei Liu
2012-01-17 13:46 ` [RFC PATCH V2 1/8] netback: page pool version 1 Wei Liu
2012-01-17 13:46 ` [RFC PATCH V2 2/8] netback: add module unload function Wei Liu
2012-01-17 13:46 ` [RFC PATCH V2 3/8] netback: switch to NAPI + kthread model Wei Liu
2012-01-17 17:07 ` Stephen Hemminger
2012-01-17 17:11 ` Wei Liu
2012-01-17 13:47 ` [RFC PATCH V2 4/8] netback: switch to per-cpu scratch space Wei Liu
2012-01-17 13:47 ` [RFC PATCH V2 5/8] netback: add module get/put operations along with vif connect/disconnect Wei Liu
2012-01-17 13:47 ` [RFC PATCH V2 6/8] netback: melt xen_netbk into xenvif Wei Liu
2012-01-17 13:47 ` [RFC PATCH V2 7/8] netback: alter internal function/structure names Wei Liu
2012-01-17 13:47 ` [RFC PATCH V2 8/8] netback: remove unwanted notification generation during NAPI processing Wei Liu
2012-01-27 19:22 ` [RFC PATCH V2] New Xen netback implementation Konrad Rzeszutek Wilk
2012-01-29 13:42 ` Wei Liu
2012-01-29 21:37 ` Konrad Rzeszutek Wilk
2012-01-30 15:01 ` Wei Liu
2012-01-30 18:27 ` Wei Liu
2012-01-30 18:30 ` Wei Liu
2012-01-30 19:41 ` Wei Liu
2012-01-30 15:07 ` Ian Campbell
2012-01-30 15:21 ` Konrad Rzeszutek Wilk [this message]
2012-01-30 15:49 ` Ian Campbell
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