From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-lj1-x22e.google.com (mail-lj1-x22e.google.com [IPv6:2a00:1450:4864:20::22e]) (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 3FF023CB36; Wed, 20 Mar 2019 19:03:35 -0400 (EDT) Received: by mail-lj1-x22e.google.com with SMTP id v22so3737393lje.9; Wed, 20 Mar 2019 16:03:35 -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=QsPBAY33if+LziK95Q7//K1t39g16dBiyUUTr9EeMjo=; b=hWTwNAPmA2q+6a/w49Vd/RVixbDhuNklcWVrnSBALnWtVy5o3eENCqCndIBHpCpYld GCpwXkqfLqq7x7CmusG7yioiN7/5i0vLnYbvfyFXJvBTK5cGBTIxy6m/gMDS1nBV4uPs /GYR3WoE92SLlf3OdB/Eh5cXDPoqf0670PhbwCVDhM39Fue8t07VZ2GqARjS3YMAn0+7 I8MlLdV5HQBByDToESYz72vjz4TI73gMtr2Mq8aS2qnGiRVvqY5VWBCq3qN3UR0RC0ki s4PrOJvtY03jOXkTSOmdD5thkdzIbP+ZDNhgEnYg+9cb601xs04QUFW5lE6sH2xY7Y0o 6M+Q== 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=QsPBAY33if+LziK95Q7//K1t39g16dBiyUUTr9EeMjo=; b=SQ4VfS9ls9eAqNnnLQJk4zcFo1eTC4CbxBWr9llM/yD9DXEDfxuj1mrtbycXrWeRXg 00VM6ns0VPGDL7940DTF1keiB8MMJgD7E+CBDHiR0/JpkNLZssPqaMXDM1T3zD7X/ofP jldjQMaOZ7ElYANV+2+CmJONzwsxD+WMeiYwFkGl7/1X29w23SlSA+/xYehO9Bi8ryUz 051SHrphZssePvuuBEYR1qzpPAkcEosukZdSYVpMpEXN7hRni/dny/JMYSJsYEgukFfw z0mdWkUMr2sG11TiQpoc5DEOiHtx9H278Yla0PzzbOfRYy4yJ4KQUIY/rDklx8N8Qvrw 56Ig== X-Gm-Message-State: APjAAAVH+xNU1hMAyA5sF6qHloED6p6cvIla2Ue1FiDe+N7t1FBMd/ds EagQwIqf0frRdADiT1R6I5o= X-Google-Smtp-Source: APXvYqxKvyEUFW5KCACXfPoMGD920F/uCNerL3JY0Z78Ej2wsjhdLkK2besUBh95XbQDXkURx7EISA== X-Received: by 2002:a2e:8616:: with SMTP id a22mr272387lji.173.1553123014268; Wed, 20 Mar 2019 16:03:34 -0700 (PDT) Received: from jonathartonsmbp.lan (83-245-226-9-nat-p.elisa-mobile.fi. [83.245.226.9]) by smtp.gmail.com with ESMTPSA id e2sm605985lfc.75.2019.03.20.16.03.33 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 20 Mar 2019 16:03:33 -0700 (PDT) Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (Mac OS X Mail 11.5 \(3445.9.1\)) From: Jonathan Morton In-Reply-To: Date: Thu, 21 Mar 2019 01:03:32 +0200 Cc: ecn-sane@lists.bufferbloat.net, bloat Content-Transfer-Encoding: quoted-printable Message-Id: References: <1E80578D-A589-4CA0-9015-B03B63042355@gmx.de> <27FA673A-2C4C-4652-943F-33FAA1CF1E83@gmx.de> <1552669283.555112988@apps.rackspace.com> <7029DA80-8B83-4775-8261-A4ADD2CF34C7@akamai.com> <1552846034.909628287@apps.rackspace.com> <5458c216-07b9-5b06-a381-326de49b53e0@bobbriscoe.net> <5C9296E1.4010703@erg.abdn.ac.uk> <06379263-6C0E-4EC1-9537-DE4C5F61846C@gmail.com> To: Sebastian Moeller X-Mailer: Apple Mail (2.3445.9.1) Subject: Re: [Bloat] [tsvwg] [Ecn-sane] [iccrg] Fwd: [tcpPrague] Implementation and experimentation of TCP Prague/L4S hackaton at IETF104 X-BeenThere: bloat@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: General list for discussing Bufferbloat List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 20 Mar 2019 23:03:35 -0000 > On 21 Mar, 2019, at 12:56 am, Sebastian Moeller = wrote: >=20 > What they should have done, IMHO is teach their AQM something like SCE = so it can easily react to CE and drops in a standard compliant = TCP-friendly fashion, and only do the clever window/rate adjustments if = the AQM signals ECT(1)=E2=80=A6 It's not even hard to teach DCTCP to respect SCE, as far as I can tell. = All you have to do is start with a clean copy of NewReno with ABC, then = subtract half of all SCE-marked bytes from the cwnd. That really is it. - Jonathan Morton