IETF Logo Mail Archive

Re: [tcpm] Comments for draft-ietf-tcpm-rfc8312bis-02

Jonathan Morton <chromatix99@gmail.com> Sun, 13 June 2021 17:24 UTC

Return-Path: <chromatix99@gmail.com>
X-Original-To: tcpm@ietfa.amsl.com
Delivered-To: tcpm@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 400903A2200; Sun, 13 Jun 2021 10:24:07 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.848
X-Spam-Level:
X-Spam-Status: No, score=-1.848 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_ENVFROM_END_DIGIT=0.25, FREEMAIL_FROM=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=unavailable autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com
Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id Lu8XgRahL5BH; Sun, 13 Jun 2021 10:24:03 -0700 (PDT)
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 ietfa.amsl.com (Postfix) with ESMTPS id 8D5B13A21FF; Sun, 13 Jun 2021 10:24:02 -0700 (PDT)
Received: by mail-lj1-x232.google.com with SMTP id bn21so16814359ljb.1; Sun, 13 Jun 2021 10:24:02 -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=nZ7GhZOKU481ntWfnmeASI+wTntWuT3jl4aLgue2RUM=; b=RUbI2x0noA04tRMhlYYOQmfwGe8Lv49lIOP69OGsAziNUJcsrSSW3hBWA0r1LQTwzc l0T7jLiJDgN1NJIuShoeWgkGAk8ielBesepDDJSIJK0iI3glSBGf7ehXMZ/LWOtSOl3R HIUIpOwCboZEz95IETsCBPQ4ihA9diH4z96q6Dt1EvlndrAlHDJTZQYz2fSJ4Z+xNPt2 fTlTfc133PIWSUdtYXENaSHg1FSjlBoWCzbcacK9rJ994brNEQAhB4EQEMH/49lUaHz5 fGyWiWqDjET8HmAGZqa+btZYneJyCNfLz1CbjYtF7hxD6zZD6vb37SlnGQBbdKMPiYGL K5wA==
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=nZ7GhZOKU481ntWfnmeASI+wTntWuT3jl4aLgue2RUM=; b=TSOY/pduqVDoQWOBivITBX9GvDL//NAfIbkKCKiL/hqg718193jJ3p7AIEQR21CFwW zP3U2FMog62q0BVtlhQQ0APYFriAWmxYgicDrSuNWwT2C3jBPKjGNSBVB+P+Vo1EWfSr jkRZ+e8wSD2G7VdiYeau8+LDWxK8YO5hPjVZgiNWYunKh5n20K3dOpkj41/hLNLvavvs ie1F3OA8BZfEizqOI/JTYGO8S+9GG/UU+64KUHOPVPKVZLukCO3puFLX0+y8P5bIOekA WTDtH9KNlTi2qxVMYmaBCHQh7PP9eawLlrwDAXIJ5b2NF2Gdwlr0vlcK+HdazeiIpnra Rxww==
X-Gm-Message-State: AOAM532gdoh0UZgFXdqvMKzlR7Hu8xO4dUmZscD7EqQwxPqLMZFs+V8L ou6tHd21eFms77Cu/H9p8Mo=
X-Google-Smtp-Source: ABdhPJzvxwuUy6cRLaNH5MMlI8wvrGQSnpBtx7ec0IiN1Z/vnf276x3fdzjYNFcp+a0GiFeENiJmUQ==
X-Received: by 2002:a2e:b891:: with SMTP id r17mr11173841ljp.134.1623605039884; Sun, 13 Jun 2021 10:23:59 -0700 (PDT)
Received: from jonathartonsmbp.lan (178-55-194-130.bb.dnainternet.fi. [178.55.194.130]) by smtp.gmail.com with ESMTPSA id p11sm1234155lfr.91.2021.06.13.10.23.58 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Sun, 13 Jun 2021 10:23:59 -0700 (PDT)
Content-Type: text/plain; charset=us-ascii
Mime-Version: 1.0 (Mac OS X Mail 11.5 \(3445.9.7\))
From: Jonathan Morton <chromatix99@gmail.com>
In-Reply-To: <87F5FEC9-87CC-4B94-AF63-011CD3C6AEB1@apple.com>
Date: Sun, 13 Jun 2021 20:23:57 +0300
Cc: "tcpm@ietf.org Extensions" <tcpm@ietf.org>, draft-ietf-tcpm-rfc8312bis@ietf.org
Content-Transfer-Encoding: quoted-printable
Message-Id: <22912B93-506A-4218-86B6-559394B75DD9@gmail.com>
References: <CAAK044Q6Xy72-xsNdJ5yP0PDdo08N9zmAWickf13788E4u8cJw@mail.gmail.com> <CAAK044TxNs1B3VA1NzEgXyCRXSb8MHSNKkXeac2UFstQu7e8Mg@mail.gmail.com> <CAAK044QSo-0E_QHWDqrDE2VLEzOFEA4SxnHSX9DSKvSg-8y+pg@mail.gmail.com> <8DEC1E1C-B8DD-4199-AA49-F6AB7EC7C35E@eggert.org> <E687289E-D807-4CAF-81F8-3CDEAB6E224D@apple.com> <87F5FEC9-87CC-4B94-AF63-011CD3C6AEB1@apple.com>
To: Vidhi Goel <vidhi_goel=40apple.com@dmarc.ietf.org>
X-Mailer: Apple Mail (2.3445.9.7)
Archived-At: <https://mailarchive.ietf.org/arch/msg/tcpm/ncstdG1hEywiGjxnyMOs-dV5KXI>
Subject: Re: [tcpm] Comments for draft-ietf-tcpm-rfc8312bis-02
X-BeenThere: tcpm@ietf.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: TCP Maintenance and Minor Extensions Working Group <tcpm.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/tcpm>, <mailto:tcpm-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/tcpm/>
List-Post: <mailto:tcpm@ietf.org>
List-Help: <mailto:tcpm-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/tcpm>, <mailto:tcpm-request@ietf.org?subject=subscribe>
X-List-Received-Date: Sun, 13 Jun 2021 17:24:07 -0000

> On 11 Jun, 2021, at 4:51 am, Vidhi Goel <vidhi_goel=40apple.com@dmarc.ietf.org> wrote:
> 
> As we are in the WGLC for rfc8312bis, I would really appreciate your feedback on this issue (https://github.com/NTAP/rfc8312bis/issues/64). Please let us know latest by Jun 15th if you have any input/thoughts on it. After that, the issue will be closed with no action.

I left a comment on the Github issue, suggesting a possible way to clarify the section at issue.  Currently the use of the various alpha and beta symbols is a bit convoluted and could cause confusion; though a careful reading does reveal the correct interpretation, this may be difficult for some readers and could result in inadvertent mistakes.

The essence of what I suggest is:

1: Where alpha and beta are used as parameters to a formula, write them without suffixes in the formula's definition, particularly AVG_AIMD(alpha,beta).

2: Use the "aimd" suffix to refer solely to the alpha and beta parameters from Reno.

3: Consistently use the "cubic" suffix for the alpha and beta parameters of CUBIC.

4: Explain the calculation of alpha_cubic in terms of equalising the values of AVG_AIMD(alpha_aimd, beta_aimd) and AVG_AIMD(alpha_cubic, beta_cubic).

I believe the above approach to will improve clarity noticeably without increasing the number of symbols in play.  I will leave the fine details of wording and formatting to the authors and editors.

 - Jonathan Morton

v2.8.7 | Report a Bug | By Email