From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from Chamillionaire.breakpoint.cc (Chamillionaire.breakpoint.cc [IPv6:2001:4d88:1ffa:82:880:aa0:9009:64ae]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client did not present a certificate) by huchra.bufferbloat.net (Postfix) with ESMTPS id F095F21F0E7 for ; Wed, 3 Apr 2013 11:23:09 -0700 (PDT) Received: from pfeifer by Chamillionaire.breakpoint.cc with local (Exim 4.72) (envelope-from ) id 1UNSKw-0003Zy-0Z; Wed, 03 Apr 2013 20:23:06 +0200 Date: Wed, 3 Apr 2013 20:23:05 +0200 From: Hagen Paul Pfeifer To: Juliusz Chroboczek Message-ID: <20130403182304.GA3381@virgo.local> References: <514A1A60.2090006@swin.edu.au> <20130320161622.25fbd642@nehalam.linuxnetplumber.net> <87y5czscml.wl%jch@pps.univ-paris-diderot.fr> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <87y5czscml.wl%jch@pps.univ-paris-diderot.fr> X-Key-Id: 98350C22 X-Key-Fingerprint: 490F 557B 6C48 6D7E 5706 2EA2 4A22 8D45 9835 0C22 X-GPG-Key: gpg --recv-keys --keyserver wwwkeys.eu.pgp.net 98350C22 User-Agent: Mutt/1.5.21 (2010-09-15) Cc: bloat@lists.bufferbloat.net Subject: Re: [Bloat] Solving bufferbloat with TCP using packet delay 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, 03 Apr 2013 18:23:10 -0000 * Juliusz Chroboczek | 2013-04-03 20:16:50 [+0200]: >> But it is hard, and the delay based algorithms are fundamentally >> flawed because they see reverse path delay and cross traffic as false >> positives. > >I'm not sure what you mean. All modern delay-based congestion >algorithms that I am aware of use one-way delay as an indicator of >congestion, not RTT. It depends on what you define as modern Juliusz. Vegas? Yeah-TCP? Nope.