[babel] short rtt metrics and unicast and flow control

Dave Taht <dave.taht@gmail.com> Fri, 05 April 2019 09:39 UTC

Return-Path: <dave.taht@gmail.com>
X-Original-To: babel@ietfa.amsl.com
Delivered-To: babel@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 365CB1201C0 for <babel@ietfa.amsl.com>; Fri, 5 Apr 2019 02:39:46 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.999
X-Spam-Level:
X-Spam-Status: No, score=-1.999 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham 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 G_b6tg_5wmpm for <babel@ietfa.amsl.com>; Fri, 5 Apr 2019 02:39:44 -0700 (PDT)
Received: from mail-qk1-x72a.google.com (mail-qk1-x72a.google.com [IPv6:2607:f8b0:4864:20::72a]) (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 55893120045 for <babel@ietf.org>; Fri, 5 Apr 2019 02:39:44 -0700 (PDT)
Received: by mail-qk1-x72a.google.com with SMTP id s81so3379221qke.13 for <babel@ietf.org>; Fri, 05 Apr 2019 02:39:44 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:from:date:message-id:subject:to :content-transfer-encoding; bh=SDoftdf4IdRr3A0y3wz0OuW9VTmim+I6Cu2/eQT5I3A=; b=XkKO02W/4XmeJ7I2KOGERccxd1aUGurmPU/FoGmCyj8jdSG5lYmzNnNW97ObpyKdKX lGN0h/pDFZaNwm9OfolscmeJ5bPH5IvjMDQ9WRcDKbnQ31YxqjKHM90TZjdVvCSKWPfF Wl8Ab5Cq1T/HWZu1UBqzJXPPusOL/wRFhrPExn30zMWZfXN8lSBKMBdNtW3Ru/itnEzr 7QZ8yhvvL4S8em7byOIbJUmbB5g/YVvzxK74EzPhkD1jPNaIVC0y6i33L3M1y7QKtaF8 oWzlpdJ+FSt7xAmhOiZQN7LXHf35rE263ZwsaGcXsJuPD7eH1cW2AgsE6m/yFSJSqLUA Ysug==
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:from:date:message-id:subject:to :content-transfer-encoding; bh=SDoftdf4IdRr3A0y3wz0OuW9VTmim+I6Cu2/eQT5I3A=; b=p+uXklsj5AEA/qOTq9D68vHnJ7fHuw4Fdqp3w7A1ZwP6pG2gOn0cGMVnr38huVpMt7 RM3HjM8GUFF4l41dLhhhu+L0fd/1kvoOwpKA8cdeXEeDEGRA+yYttox3Lfr42YWToSHI gu3pHINhyY9mdk/iESlvbewaoEbJdqkAZvjNYWKBKuwsOMDtb5FIIHAWW5sEnHeoTPi8 +17Jey2iz3oNA6WYKtn+sLY+OB4i2lhlvVv6qRn9IyelGN1KFpBHHA3RrNLXnXnBRNgm n0Bp7yozZQT23TvAC1X4lbNIwX2jloFcunCYigEXL8eSgJNbr7fgsVo/iWF4RgVgUoMv U3Yg==
X-Gm-Message-State: APjAAAUR0PmnsqLw+HnKwJj7FmgzTL6ZVLPVIffbi7r2YlctYqxV6gPF LCvCMO0dttYm8+lBW/dy8wkK8pmRrwsvramtHzfMaB43Gq8=
X-Google-Smtp-Source: APXvYqwdpG4noJTBCfhEFXfHFcukTwT23e/quDxGTJUeGqa/U+k10/PN6g8114LKt+qieB2IfmD8tJJGAVGppCK/JVo=
X-Received: by 2002:a37:a5d8:: with SMTP id o207mr9463755qke.0.1554457182642; Fri, 05 Apr 2019 02:39:42 -0700 (PDT)
MIME-Version: 1.0
From: Dave Taht <dave.taht@gmail.com>
Date: Fri, 05 Apr 2019 11:39:31 +0200
Message-ID: <CAA93jw7FVZLP8=bioguMRZaBWhDPcQ2dUoNPD0U6G6tP9TvLUw@mail.gmail.com>
To: Babel at IETF <babel@ietf.org>, babel-users <babel-users@lists.alioth.debian.org>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
Archived-At: <https://mailarchive.ietf.org/arch/msg/babel/_eR416VoFfQPCTTYf0kW2yBuGOw>
Subject: [babel] short rtt metrics and unicast and flow control
X-BeenThere: babel@ietf.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: "A list for discussion of the Babel Routing Protocol." <babel.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/babel>, <mailto:babel-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/babel/>
List-Post: <mailto:babel@ietf.org>
List-Help: <mailto:babel-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/babel>, <mailto:babel-request@ietf.org?subject=subscribe>
X-List-Received-Date: Fri, 05 Apr 2019 09:39:46 -0000

I've had, oh, 4 hours per year to work on short rtt metrics for babel.
If it's of any help, this is the only public commit I ever made on the
subject.

https://github.com/dtaht/babeld-shortrtt-metrics/commit/10a081f70cd89c3ad13d74c5587d308d0fb7d46d

Elsewhere I've oft talked about the possibilities/problems of unicast
and rtt measurements, in my usual fragmentary and chaotic way.

Two good references are:

https://alioth-lists.debian.net/pipermail/babel-users/2015-April/001974.html

and I can't find the really long rant I'd written during the usec debate...

and an old wishlist:

https://alioth-lists.debian.net/pipermail/babel-users/2015-December/002194.html
-- 

Dave Täht
CTO, TekLibre, LLC
http://www.teklibre.com
Tel: 1-831-205-9740