From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail2.tohojo.dk (mail2.tohojo.dk [77.235.48.147]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.bufferbloat.net (Postfix) with ESMTPS id 103783B25E; Wed, 10 Aug 2016 18:05:55 -0400 (EDT) X-Virus-Scanned: amavisd-new at mail2.tohojo.dk DKIM-Filter: OpenDKIM Filter v2.10.3 mail2.tohojo.dk 7706040D5E DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=toke.dk; s=201310; t=1470866753; bh=rzMbhJRIo08uhYmcAsdjaSp00B2haj4yCcJL6ZAvE2U=; h=From:To:Cc:Subject:References:Date:In-Reply-To:From; b=oCIGPEZhUoBtwVgDAaAq1vseFcRgYp3M9K3eagtOh7rHnwrrEFvY3EQSvIkbrdzwv Hy8wdVtKXHdpZSxnE0D/0Tlr+mPlvq3S8wiHyTkDYDp10zDKOn9jDWCYtSQVSm9xwU hhwMm39nHZ7b/+A3lAi1SMqf1onJYJUkseGLUlkM= Received: by alrua-x1.borgediget.toke.dk (Postfix, from userid 1000) id 71440564C; Thu, 11 Aug 2016 00:05:52 +0200 (CEST) From: =?utf-8?Q?Toke_H=C3=B8iland-J=C3=B8rgensen?= To: Dave Taht Cc: make-wifi-fast@lists.bufferbloat.net, "cerowrt-devel\@lists.bufferbloat.net" , Felix Fietkau References: <76eb6a6a-2f39-3b36-d4c1-04198083c0f6@gmail.com> <87oa50acnr.fsf@toke.dk> <87bn109tv8.fsf@toke.dk> Date: Thu, 11 Aug 2016 00:05:52 +0200 In-Reply-To: (Dave Taht's message of "Wed, 10 Aug 2016 23:58:44 +0200") X-Clacks-Overhead: GNU Terry Pratchett Message-ID: <877fbo9t4v.fsf@toke.dk> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Subject: Re: [Cerowrt-devel] [Make-wifi-fast] wifi airtime fairness patches could use eyeballs and testing X-BeenThere: cerowrt-devel@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: Development issues regarding the cerowrt test router project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 10 Aug 2016 22:05:56 -0000 Dave Taht writes: > On Wed, Aug 10, 2016 at 11:50 PM, Toke H=C3=B8iland-J=C3=B8rgensen wrote: >> Toke H=C3=B8iland-J=C3=B8rgensen writes: >> >>> On 10 August 2016 21:35:40 CEST, Dave Taht wrote: >>>>Wow, that *is* weird. It is good to see the tcp window changing on >>>>this set of data (it wasn't before), and CWRs, but... hmmm... SCIENCE. >>>> >>>>Enabling ecn on both sides will rule out some potential bugs. >>> >>> Yeah, couldn't get ecn to work on the host I was using as the other end= point on >>> that test. Will try with another box that's not on quite as ancient a k= ernel. >>> Was also planning to disable codel (by setting a very high target) to t= ry to >>> narrow down the problem. >> >> OK, digging some more on this: >> >> I am seeing *no* drops by CoDel, and no backlog in the mac80211 softq >> layer either (or at most one or two packets when polling with a 1 sec >> interval). This is with one as well as with two flows. > > But there are tons of drops evident from the captures. Well the CoDel drop counter stays completely flat. There are cwnd reductions, yes, but are they drops? My thought was that they were retransmissions caused by OOO packets? -Toke