From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-lj1-x232.google.com (mail-lj1-x232.google.com [IPv6:2a00:1450:4864:20::232]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by lists.bufferbloat.net (Postfix) with ESMTPS id AF6703CB3B for ; Thu, 18 Jul 2019 01:30:35 -0400 (EDT) Received: by mail-lj1-x232.google.com with SMTP id y17so1379313ljk.10 for ; Wed, 17 Jul 2019 22:30:35 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=Cr7o8OusgZVhEqOffleF7v3PZ9dOcCItznpY2y6dkiY=; b=a/lS0vfU7uOpd7Qex4tvHoOBzBWU+6qu9g8rmc64lwVgUoerDrjPfyNCp3S5P4ixxX 8+eQik43wAaKPOraPhYK7rm0hymmc1xuVWSGnA+An6xY3HOcxDCx2Ztcm2SYGDUYNzFz Zq3qkfSEFWXPMaocLdRoCC4jp33QTWx4KpncScaSPvUvFqGzWNiRzPgSJV12aUcKLYZH JJ35e1/eFGGW9fh8vPG8gkvmrGtUmJYmruyw0JpZNUmPbCIsw6fxcaJZtS2URFeyDfvV mfKiIoJpxFngz8XZrL443kxrk2ltlkr+i2tggmcyvy+1JNlWoEd7BPducUSLUYpWTC6x nTZg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=Cr7o8OusgZVhEqOffleF7v3PZ9dOcCItznpY2y6dkiY=; b=KO9FxncsEDzebXHfavhedHMrCsOlrelveNm+/dPS8SCSty3+4BavdSFEOwzGvhu5cm cMNFaGyMsx5yxwijn2La4q1aNUbfAJPZmJeJs8fAMVXrO+ggy55i4/rW+efCgRyzUNBV ek8kiiucKqbzcFQymMcN3O4sm3i5idChKcjazsC/1nsoJcbVBQp0vwItiljeMuHMTK9C zLY9QscKrVdY0Y362kjinUbAvBr35iFRkbs4tYFvYJDd5q0y6+rtDKnJj12R+TiA8r4M pgpDwrUeNyIzRIuV/bGAKJNsZqYkRCyw5r5YuR0OL1tslr1lIX6MbM+Rs0gj6W3aLHGC UBbA== X-Gm-Message-State: APjAAAU2e+5MH28HskipUKQ3OO6atd8b3AMBjvnwaYleZ1fbUlzUc6al ro8kfcubCR+T9ABrODaQKfU= X-Google-Smtp-Source: APXvYqzkF0viZugyNW2d+mSdCZplOKZ3i9JpG16rLM9koVrE29es4m6KQWu7LV5vM8QidFfeHfm03Q== X-Received: by 2002:a2e:9048:: with SMTP id n8mr3895826ljg.37.1563427834391; Wed, 17 Jul 2019 22:30:34 -0700 (PDT) Received: from [192.168.44.148] (37-219-185-236.nat.bb.dnainternet.fi. [37.219.185.236]) by smtp.gmail.com with ESMTPSA id d7sm3775859lfa.86.2019.07.17.22.30.32 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 17 Jul 2019 22:30:33 -0700 (PDT) Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 11.5 \(3445.9.1\)) From: Jonathan Morton In-Reply-To: Date: Thu, 18 Jul 2019 08:30:28 +0300 Cc: "David P. Reed" , Bob Briscoe , "ecn-sane@lists.bufferbloat.net" , tsvwg IETF list Content-Transfer-Encoding: quoted-printable Message-Id: References: <350f8dd5-65d4-d2f3-4d65-784c0379f58c@bobbriscoe.net> <40605F1F-A6F5-4402-9944-238F92926EA6@gmx.de> <1563401917.00951412@apps.rackspace.com> <1563402855.88484511@apps.rackspace.com> To: Dave Taht X-Mailer: Apple Mail (2.3445.9.1) Subject: Re: [Ecn-sane] per-flow scheduling X-BeenThere: ecn-sane@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: Discussion of explicit congestion notification's impact on the Internet List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 18 Jul 2019 05:30:35 -0000 > On 18 Jul, 2019, at 3:20 am, Dave Taht wrote: >=20 >> What it should do instead is peek the queue and drop until it hits a >> markable packet, at the very least. >=20 > I didn't say this well. It should drop otherwise markable packets = until it > exits the loop, and then mark the one it delivers from that flow, if = it delivers > one from that flow. That gets rid of all the extra mass ecn creates... You know, I think I finally understand what you're talking about here. = You want to treat cases where the marking rate exceeds the flow's packet = delivery rate as an overload condition justifying a shift to packet = drops. This actually seems like a sane idea. There is I think one caveat: = selecting the Codel 'interval' parameter will now have an increased = penalty for getting it wrong, especially on the too-small side. - Jonathan Morton