From mboxrd@z Thu Jan  1 00:00:00 1970
From: Bruce Richardson <bruce.richardson@intel.com>
Subject: Re: [PATCH 0/9] mbuf: structure reorganization
Date: Thu, 30 Mar 2017 10:31:08 +0100
Message-ID: <20170330093108.GA10652@bricha3-MOBL3.ger.corp.intel.com>
References: <1485271173-13408-1-git-send-email-olivier.matz@6wind.com>
 <1488966121-22853-1-git-send-email-olivier.matz@6wind.com>
 <20170329175629.68810924@platinum>
 <20170329200923.GA11516@bricha3-MOBL3.ger.corp.intel.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Cc: dev@dpdk.org, konstantin.ananyev@intel.com, mb@smartsharesystems.com,
 andrey.chilikin@intel.com, jblunck@infradead.org,
 nelio.laranjeiro@6wind.com, arybchenko@solarflare.com
To: Olivier Matz <olivier.matz@6wind.com>
Return-path: <dev-bounces@dpdk.org>
Received: from mga11.intel.com (mga11.intel.com [192.55.52.93])
 by dpdk.org (Postfix) with ESMTP id 7380E37A0
 for <dev@dpdk.org>; Thu, 30 Mar 2017 11:31:13 +0200 (CEST)
Content-Disposition: inline
In-Reply-To: <20170329200923.GA11516@bricha3-MOBL3.ger.corp.intel.com>
List-Id: DPDK patches and discussions <dev.dpdk.org>
List-Unsubscribe: <http://dpdk.org/ml/options/dev>,
 <mailto:dev-request@dpdk.org?subject=unsubscribe>
List-Archive: <http://dpdk.org/ml/archives/dev/>
List-Post: <mailto:dev@dpdk.org>
List-Help: <mailto:dev-request@dpdk.org?subject=help>
List-Subscribe: <http://dpdk.org/ml/listinfo/dev>,
 <mailto:dev-request@dpdk.org?subject=subscribe>
Errors-To: dev-bounces@dpdk.org
Sender: "dev" <dev-bounces@dpdk.org>

On Wed, Mar 29, 2017 at 09:09:23PM +0100, Bruce Richardson wrote:
> On Wed, Mar 29, 2017 at 05:56:29PM +0200, Olivier Matz wrote:
> > Hi,
> > 
> > Does anyone have any other comment on this series?
> > Can it be applied?
> > 
> > 
> > Thanks,
> > Olivier
> > 
> 
> I assume all driver maintainers have done performance analysis to check
> for regressions. Perhaps they can confirm this is the case.
> 
> 	/Bruce
> > 
In the absence, of anyone else reporting performance numbers with this
patchset, I ran a single-thread testpmd test using 2 x 40G ports (i40e)
driver. With RX & TX descriptor ring sizes of 512 or above, I'm seeing a
fairly noticable performance drop. I still need to dig in more, e.g. do
an RFC2544 zero-loss test, and also bisect the patchset to see what
parts may be causing the problem.

Has anyone else tried any other drivers or systems to see what the perf
impact of this set may be?

/Bruce