From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from korolev.univ-paris7.fr (korolev.univ-paris7.fr [IPv6:2001:660:3301:8000::1:2]) (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 C6BD13B2A4 for ; Sat, 30 Jul 2022 08:55:42 -0400 (EDT) Received: from potemkin.univ-paris7.fr (potemkin.univ-paris7.fr [IPv6:2001:660:3301:8000::1:1]) by korolev.univ-paris7.fr (8.14.4/8.14.4/relay1/82085) with ESMTP id 26UCteS3009280 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Sat, 30 Jul 2022 14:55:40 +0200 Received: from mailhub.math.univ-paris-diderot.fr (mailhub.math.univ-paris-diderot.fr [81.194.30.253]) by potemkin.univ-paris7.fr (8.14.4/8.14.4/relay2/82085) with ESMTP id 26UCteek006087; Sat, 30 Jul 2022 14:55:40 +0200 Received: from mailhub.math.univ-paris-diderot.fr (localhost [127.0.0.1]) by mailhub.math.univ-paris-diderot.fr (Postfix) with ESMTP id 40D6949B1; Sat, 30 Jul 2022 14:55:40 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=irif.fr; h= content-type:content-type:mime-version:user-agent:references :in-reply-to:subject:subject:from:from:message-id:date:date :received:received; s=dkim-irif; t=1659185739; x=1660049740; bh= w19T0Lc/6N+muNXSrmz8a0g9XDwCmvtm+Ujk5INcv3g=; b=my3qw/AolKHk5R0B YRF9xINfHOgmVi2ZyFzAkBElVWZvfI7ZbX2nzdmwdu0u6+wz1OCbN01k/EYabq6K vmJULVqMRYTb5ff8mwoMH0sarZ1o75g/qem9x6mVRUtCp5jMF8uGVKXw2I7I0Cuo aDv4aFswvsyACq6DviXghds0DE0bm417WBeTGICIQThXMzBcninh3kKvWiuJrZxy Lv+LP1TQdCyvUfJhl5wWXU7W9pGD9uyqmBK9N2udcZRFTHsq1hB0oXBLlMwHAZEL qyri5kXsvEW+wPTqP+5wkp69rjnDeNbz3xFxhMxVxbG9F1O4o3vYY856ZItZV+gD 4KGTBQ== X-Virus-Scanned: amavisd-new at math.univ-paris-diderot.fr Received: from mailhub.math.univ-paris-diderot.fr ([127.0.0.1]) by mailhub.math.univ-paris-diderot.fr (mailhub.math.univ-paris-diderot.fr [127.0.0.1]) (amavisd-new, port 10023) with ESMTP id UMCMiK2tUqW1; Sat, 30 Jul 2022 14:55:39 +0200 (CEST) Received: from pirx.irif.fr (unknown [78.194.40.74]) (Authenticated sender: jch) by mailhub.math.univ-paris-diderot.fr (Postfix) with ESMTPSA id 16E2D49AF; Sat, 30 Jul 2022 14:55:39 +0200 (CEST) Date: Sat, 30 Jul 2022 14:55:38 +0200 Message-ID: <87czdmwyid.wl-jch@irif.fr> From: Juliusz Chroboczek To: =?ISO-8859-1?Q?Bj=F8rn?= Ivar Teigen Cc: starlink@lists.bufferbloat.net In-Reply-To: References: <1659123485.059828918@apps.rackspace.com> User-Agent: Wanderlust/2.15.9 (Almost Unreal) Emacs/27.1 Mule/6.0 MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") Content-Type: text/plain; charset=US-ASCII X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.2.7 (korolev.univ-paris7.fr [IPv6:2001:660:3301:8000::1:2]); Sat, 30 Jul 2022 14:55:40 +0200 (CEST) X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.2.7 (potemkin.univ-paris7.fr [194.254.61.141]); Sat, 30 Jul 2022 14:55:40 +0200 (CEST) X-Miltered: at korolev with ID 62E52A4C.000 by Joe's j-chkmail (http : // j-chkmail dot ensmp dot fr)! X-Miltered: at potemkin with ID 62E52A4C.000 by Joe's j-chkmail (http : // j-chkmail dot ensmp dot fr)! X-j-chkmail-Enveloppe: 62E52A4C.000 from potemkin.univ-paris7.fr/potemkin.univ-paris7.fr/null/potemkin.univ-paris7.fr/ X-j-chkmail-Enveloppe: 62E52A4C.000 from mailhub.math.univ-paris-diderot.fr/mailhub.math.univ-paris-diderot.fr/null/mailhub.math.univ-paris-diderot.fr/ X-j-chkmail-Score: MSGID : 62E52A4C.000 on korolev.univ-paris7.fr : j-chkmail score : . : R=. U=. O=. B=0.000 -> S=0.000 X-j-chkmail-Score: MSGID : 62E52A4C.000 on potemkin.univ-paris7.fr : j-chkmail score : . : R=. U=. O=. B=0.000 -> S=0.000 X-j-chkmail-Status: Ham X-j-chkmail-Status: Ham Subject: Re: [Starlink] Finite-Buffer M/G/1 Queues with Time and Space Priorities X-BeenThere: starlink@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: "Starlink has bufferbloat. Bad." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 30 Jul 2022 12:55:43 -0000 > I've got a pet theory that the burstiness of internet traffic is an artifact of > the fact that academics and marketing departments, in a weird kind of unholy > alliance, keep focusing on peak throughput. Hmm. Packet pacing is counterintuitive and tricky to get right. It's highly counter-intuitive to most people that delaying packet transmission will end up reducing latency. It's tricky to decide how to pace your packets when you don't know (1) how your congestion window is going to evolve and (2) how the application demand is going to evolve in the near future. Let alone that it reduces cache locality and requires fine-grained timers, both of which are costly if implemented in software on a general-purpose OS. As to academics having sold out to marketing departments -- it seems I've missed out, where do I collect my share? -- Juliusz