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 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by huchra.bufferbloat.net (Postfix) with ESMTPS id 12C6321F352; Sun, 14 Jun 2015 10:27:32 -0700 (PDT) X-Virus-Scanned: amavisd-new at mail2.tohojo.dk DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=toke.dk; s=201310; t=1434302844; bh=JvDj9bIrwUuB+cPojFikRiIyfVikCCt5UFp6M2H0TH4=; h=From:To:Cc:Subject:References:Date:In-Reply-To; b=MH3kg9MefWwmq165BI4j75xceXDOdMknptDl4AyO8V68WcwInAsNkIxOAy63N5be6 SaNYru/vyeEtLHQZZPwiKrhdrW56wPa6g66P76/c67HuZpd/DFI1xZvRl2rBArceW8 KKOjEYdfCHAWTaDqEJ8jyEEsRy9g4T0Ft7Ofs8gM= Sender: toke@toke.dk Received: by alrua-x1.borgediget.toke.dk (Postfix, from userid 1000) id C5FA03DCE1; Sun, 14 Jun 2015 19:27:23 +0200 (CEST) From: =?utf-8?Q?Toke_H=C3=B8iland-J=C3=B8rgensen?= To: Jonathan Morton References: <0CFA8991-9F5E-4988-82ED-6CA0E4E08676@gmail.com> Date: Sun, 14 Jun 2015 19:27:23 +0200 In-Reply-To: <0CFA8991-9F5E-4988-82ED-6CA0E4E08676@gmail.com> (Jonathan Morton's message of "Sun, 14 Jun 2015 20:19:15 +0300") X-Clacks-Overhead: GNU Terry Pratchett Message-ID: <87a8w2qjyc.fsf@toke.dk> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Cc: cake@lists.bufferbloat.net, Alan Jenkins , "cerowrt-devel@lists.bufferbloat.net" Subject: Re: [Cerowrt-devel] [Cake] openwrt build available with latest cake and fq_pie X-BeenThere: cerowrt-devel@lists.bufferbloat.net X-Mailman-Version: 2.1.13 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: Sun, 14 Jun 2015 17:28:01 -0000 Jonathan Morton writes: > *That* is why I put in count/2. A multiplicative decrease allows count > to stabilise at some value which adequately controls the queue, rather > than continuously increasing past it. For the typical cake case where > there is one flow per Codel instance and the RTT is of Internet scale, > this should work at least as well as an additive decrease; in > particular, the behaviour is identical where count ended at 2, 3 or 4 > (it can=E2=80=99t end at 1). Is there any reason why the decrease couldn't be some sort of decay? I.e. a function of how long ago the drop state was exited? -Toke