From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from uplift.swm.pp.se (swm.pp.se [212.247.200.143]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by huchra.bufferbloat.net (Postfix) with ESMTPS id EEA5D201253 for ; Sat, 28 Sep 2013 00:01:35 -0700 (PDT) Received: by uplift.swm.pp.se (Postfix, from userid 501) id 04F189C; Sat, 28 Sep 2013 09:01:33 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by uplift.swm.pp.se (Postfix) with ESMTP id E61949A; Sat, 28 Sep 2013 09:01:33 +0200 (CEST) Date: Sat, 28 Sep 2013 09:01:33 +0200 (CEST) From: Mikael Abrahamsson To: "Eggert, Lars" In-Reply-To: <6F314D4E-A03B-4273-A79B-EB14EDCF8274@netapp.com> Message-ID: References: <20130925143510.GA6191@sesse.net> <012C3117EDDB3C4781FD802A8C27DD4F25D8E29B@SACEXCMBX02-PRD.hq.netapp.com> <6F314D4E-A03B-4273-A79B-EB14EDCF8274@netapp.com> User-Agent: Alpine 2.02 (DEB 1266 2009-07-14) Organization: People's Front Against WWW MIME-Version: 1.0 Content-Type: TEXT/PLAIN; format=flowed; charset=US-ASCII Cc: "Scheffenegger, Richard" , "iccrg@irtf.org" , "aqm@ietf.org" , bloat Subject: Re: [Bloat] [iccrg] [aqm] AQM deployment status? 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: Sat, 28 Sep 2013 07:01:36 -0000 On Fri, 27 Sep 2013, Eggert, Lars wrote: > On Sep 27, 2013, at 4:59, Mikael Abrahamsson wrote: >> Do you know of simulations or similar that investigates this? I would like to understand why having RED on a 3ms buffer depth device makes a difference and how much difference it makes. > > Because saving 3ms on a path with microsecond latency is a big deal? Yes, of course. I am not a datacenter guy so this is not a problem I face, because most of packets in my environment travel tens or hundreds of milliseconds. So in datacenter one wants to start marking ECN on packets very soon into buffer depth, hoping sender will get feedback and throttle back the speed way before one gets taildrops? -- Mikael Abrahamsson email: swmike@swm.pp.se