From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-22-ewr.dyndns.com (mxout-072-ewr.mailhop.org [216.146.33.72]) by lists.bufferbloat.net (Postfix) with ESMTP id 8937B2E00B9 for ; Wed, 16 Mar 2011 15:12:14 -0700 (PDT) Received: from scan-22-ewr.mailhop.org (scan-22-ewr.local [10.0.141.244]) by mail-22-ewr.dyndns.com (Postfix) with ESMTP id 458AE30414 for ; Wed, 16 Mar 2011 22:12:13 +0000 (UTC) X-Spam-Score: 0.0 () X-Mail-Handler: MailHop by DynDNS X-Originating-IP: 213.165.64.22 Received: from mailout-de.gmx.net (mailout-de.gmx.net [213.165.64.22]) by mail-22-ewr.dyndns.com (Postfix) with SMTP id 4EC2731116 for ; Wed, 16 Mar 2011 22:12:08 +0000 (UTC) Received: (qmail invoked by alias); 16 Mar 2011 22:12:07 -0000 Received: from unknown (EHLO srichardlxp2) [213.143.107.142] by mail.gmx.net (mp026) with SMTP; 16 Mar 2011 23:12:07 +0100 X-Authenticated: #20720068 X-Provags-ID: V01U2FsdGVkX18s5b8OQoYsEX1ndQG8ZDudHqgLBhUUMNq1Q6njQF QmicHe0m6sZfT2 Message-ID: <9778FB1E95C54F4C96443A051B3E831B@srichardlxp2> From: "Richard Scheffenegger" To: =?UTF-8?Q?Dave_=22T=C3=A4ht=22?= , "Eric Dumazet" References: <4D7F4121.40307@freedesktop.org><20110315175942.GA10064@goldfish> <1300212877.2087.2155.camel@tardy><20110315183111.GB2542@tuxdriver.com><29B06777-CC5F-4802-8727-B04F58CDA9E3@gmail.com><20110315205146.GF2542@tuxdriver.com><219C7840-ED79-49EA-929D-96C5A6200401@gmail.com><20110315151946.31e86b46@nehalam><1300228592.2087.2191.camel@tardy><1300229578.2565.29.camel@edumazet-laptop> <87fwqo54n7.fsf@cruithne.co.teklibre.org> Date: Wed, 16 Mar 2011 23:07:42 +0100 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="UTF-8"; reply-type=original Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.5931 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5994 X-Y-GMX-Trusted: 0 Cc: Stephen Hemminger , bloat@lists.bufferbloat.net Subject: Re: [Bloat] Random idea in reaction to all the discussion of TCPflavours - timestamps? X-BeenThere: bloat@lists.bufferbloat.net X-Mailman-Version: 2.1.13 Precedence: list List-Id: General list for discussing Bufferbloat List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 16 Mar 2011 22:12:14 -0000 ----- Original Message ----- > It would be good to know what 10Gbps hw was capable of pushing more > smarts (such as nRED) further down into the hardware itself, this may > inform future software abstractions and future hardware designs. > IEEE 802.1Qau is becoming available with CNA (converged network adapter), 10G NIC that also have FCoE hardware on-board. This throttles individual flows - provided the entire end-to-end network also supports 802.1Qau (Quantizied Congestion Notification), as a decent enough flow granularity. Deploying this in core networks will require a forklift upgrade, as current widely deployed 10G switches don't support QCN. On another page, cheap, widely deployed Broadcom L3 ASICs (found in the low-end hardware of major network vendors) support RED in hardware - however, OEM firmware typically doesn't allow the configuration of the full feature set. (DCTCP as a TCP-based QCN-like was demonstrated with custom broadcom firmware doing the ECN marking based, soley based on current queue depth). Regards, Richard