From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752284Ab3AYUKg (ORCPT ); Fri, 25 Jan 2013 15:10:36 -0500 Received: from mailer2.psc.edu ([128.182.70.106]:40595 "EHLO mailer2.psc.edu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751056Ab3AYUKe (ORCPT ); Fri, 25 Jan 2013 15:10:34 -0500 Message-ID: <5102DE61.80804@psc.edu> Date: Fri, 25 Jan 2013 14:34:57 -0500 From: rapier User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:17.0) Gecko/20130107 Thunderbird/17.0.2 MIME-Version: 1.0 To: Valdis.Kletnieks@vt.edu CC: web10g-user@web10g.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [Web10g-user] Web10g TCP statistics patch - mainlining into kernel? References: <18855.1359138716@turing-police.cc.vt.edu> In-Reply-To: <18855.1359138716@turing-police.cc.vt.edu> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, My name is Chris Rapier and I'm on the Web10G dev team. We are interested in moving this into consideration for the mainline Linux kernel, in fact it's the primary goal of this project. We haven't brought this to the linux kernel community as of yet as we've not completed the quantification of performance/memory impact versus a vanilla baseline as of yet. Including the KIS we also have to test the impact the DKLM imposes (taking into account measurement granularity, number of concurrent connections, maximum throughput for a single stream, etc). Then we need to compare that against Web100 and write a paper. We're looking at around a 2 month time frame for that. That being said, we welcome any and all insight and help on this that we can get from the community. Our desire to get the tests and paper worked out before bringing it to the kernel community was to simply make sure we would be able to answer any questions that might come up. Additionally, if you have any metrics of the impact of the KIS, DKLM, or any combination thereof we'd love to see them. The more data the better (for some definitions of better). I and the rest of the development team are more than happy to answer any questions, address concerns, explain our thinking, discuss possible applications for this data, etc with anyone interested. The web100-user list is probably the best way (for us at least) to do this. You do need to subscribe to post at https://lists.psc.edu/mailman/listinfo/web10g-user but I'll do my best to add any relevant posts that get caught up in the filter. Thanks for your interest and I look forward to talking to anyone interested in our work. Chris Rapier Pittsburgh Supercomputing Center On 1/25/13 1:31 PM, Valdis Kletnieks wrote: > I had a user who's working on tuning high-performance network file systems what > the chances of upstreaming the Web10G patch to provide the RFC4898 TCP Extended > Statistics MIB via netlink. > > Yes, it's a tad on the intrusive side, and there's performance costs attached - > but so are a lot of *other* things that people use all the time for kernel > debugging, and it's a zero-hit thing for people who don't choose to configure > it into their kernel. The added detailed status available from this will be > useful for people who are doing tuning and development (consider how useful > this would have been for the people who wrote the codel line discipline as part > of the bufferbloat project). > > I'm willing to do the not-so-heavy lifting of getting the existing patch > cleaned up to upstream standards and sheparded through the process, if there's > any interest at all.... > > > > _______________________________________________ > Web10g-user mailing list > Web10g-user@web10g.org > https://lists.psc.edu/mailman/listinfo/web10g-user > > To UNSUBSCRIBE visit https://lists.psc.edu/mailman/unsubscribe/web10g-user >