From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-33-ewr.dyndns.com (mxout-040-ewr.mailhop.org [216.146.33.40]) by lists.bufferbloat.net (Postfix) with ESMTP id 156F82E00B9 for ; Wed, 16 Mar 2011 17:10:47 -0700 (PDT) Received: from scan-32-ewr.mailhop.org (scan-32-ewr.local [10.0.141.238]) by mail-33-ewr.dyndns.com (Postfix) with ESMTP id BD4716F71AB for ; Thu, 17 Mar 2011 00:10:46 +0000 (UTC) X-Spam-Score: -1.0 (-) X-Mail-Handler: MailHop by DynDNS X-Originating-IP: 74.125.82.171 Received: from mail-wy0-f171.google.com (mail-wy0-f171.google.com [74.125.82.171]) by mail-33-ewr.dyndns.com (Postfix) with ESMTP id DF0166F6DF8 for ; Thu, 17 Mar 2011 00:10:41 +0000 (UTC) Received: by wyb32 with SMTP id 32so2705782wyb.16 for ; Wed, 16 Mar 2011 17:10:41 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:subject:mime-version:content-type:from :x-priority:in-reply-to:date:cc:content-transfer-encoding:message-id :references:to:x-mailer; bh=uOXio2lWlLhQXrDG9YImURZTtplohAciDkR2SkYogik=; b=st5zon0DJa9BwWRMJbtHHLDaEG0a7UE2cK0R8DNX3QNgyVMEnXtOvZ3X7t6Ztc4O/C qsCgsHKuGOLZNOLS7fPeCXDyZPs+HhdcRbeFf0g13/hydJCS1hiInfE7y9ynUK0vR9ki aDK0BBwd7LmZos6EL07FnvtgAPOmSmm5eI2KQ= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=subject:mime-version:content-type:from:x-priority:in-reply-to:date :cc:content-transfer-encoding:message-id:references:to:x-mailer; b=cWOn8EhjS27YzQbzL8EBtGq7rR8H+mk7b1b6v8cWgd3ZAD07sNxAbzWN5Kn1OXdqup 7T3kRZgwfDnZOz2q9BlXQW9eMQY7jrNCKtjLPKF77y3pr2a0rf7Z+FnjRpMzNBJ9br9k +JvV0CUWibhf6LfctPvcbPTw840PigBfB8XlU= Received: by 10.227.11.146 with SMTP id t18mr639600wbt.104.1300320641088; Wed, 16 Mar 2011 17:10:41 -0700 (PDT) Received: from [192.168.239.42] (xdsl-83-150-84-172.nebulazone.fi [83.150.84.172]) by mx.google.com with ESMTPS id z13sm280731wbd.63.2011.03.16.17.10.40 (version=TLSv1/SSLv3 cipher=OTHER); Wed, 16 Mar 2011 17:10:40 -0700 (PDT) Mime-Version: 1.0 (Apple Message framework v1082) Content-Type: text/plain; charset=us-ascii From: Jonathan Morton X-Priority: 3 In-Reply-To: <9778FB1E95C54F4C96443A051B3E831B@srichardlxp2> Date: Thu, 17 Mar 2011 02:10:38 +0200 Content-Transfer-Encoding: quoted-printable Message-Id: 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> <9778FB1E95C54F4C96443A051B3E831B@srichardlxp2> To: "Richard Scheffenegger" X-Mailer: Apple Mail (2.1082) 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: Thu, 17 Mar 2011 00:10:48 -0000 On 17 Mar, 2011, at 12:07 am, Richard Scheffenegger wrote: > IEEE 802.1Qau is becoming available with CNA (converged network = adapter), 10G NIC that also have FCoE hardware on-board. >=20 > This throttles individual flows - provided the entire end-to-end = network also supports 802.1Qau (Quantizied Congestion Notification), as = a decent enough flow granularity. >=20 > Deploying this in core networks will require a forklift upgrade, as = current widely deployed 10G switches don't support QCN. Well that's an engineering failure - unless, of course, non-TCP/IP = traffic is predominant in the environments these are put into. In any = case, this is not a solution for the Internet. > 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). Ah, market segmentation, how do I hate thee? Let me count the ways. - Jonathan