From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ed1-x52e.google.com (mail-ed1-x52e.google.com [IPv6:2a00:1450:4864:20::52e]) (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 0BA3D3B29E for ; Mon, 26 Sep 2022 17:02:28 -0400 (EDT) Received: by mail-ed1-x52e.google.com with SMTP id u24so10700126edb.9 for ; Mon, 26 Sep 2022 14:02:28 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=perens.com; s=google; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:from:to:cc:subject:date; bh=DwkVP9BmKokotquYWUVUDInr0tHqrCCqvHm6zkJKMeY=; b=ofAXx7IPptk29s5Lzn8hwaGifm4beo+4zt98whOMMSuF1V2ceDv909qXE2mrr9TrcY 2RS6Usn6/tCeJumuCkJs20qIRaWz0J3DiE2anrOM/x8iI07UoQTjYoYBzSkfrKCPdq7G GuvPKc/+4q7dHHaWUAVxovJ7H0CRB0sNboTTg= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:x-gm-message-state:from:to:cc:subject:date; bh=DwkVP9BmKokotquYWUVUDInr0tHqrCCqvHm6zkJKMeY=; b=rK9/zjJ0stCXeGnB5G9FiN4klbCOTRD46OeswrvmhezrMbF899DiNIBIFND70hEHGg l3feVZHUtIipN1I8lzbA/g8iXpwV398jWcfKX+FIBs9lSRf1vCprjaKxY5xj+jpA9Bgm pcOvTXuMmY0IOc/UDXC4B574iyDN13tfiA9V+Bhip07mqxKMOfm5atqyJxZrV8U+jHcE TiZOOVGTg9albvMvJAjy1ILZpDqt997gmK8H9i5hgoRCXrCjoVGgKtI4bVQF2tMMay9q ux90iM6A3VPFWUHTzrp2dezPYMP3xu5U3QJsg0GzLD4ZcMIWnDkAcO6MREU5RG9plCsn xIzA== X-Gm-Message-State: ACrzQf1EGUkeXU7udYBr58Vn7sq7kGGdIDy880bBZarJTHk06Y/NgVoZ yjHh+R/pHZmQoLqCGkuSthqbaU7KYs6ObLXFQRr8KGRuBT7xdQ== X-Google-Smtp-Source: AMsMyM7MoRVX1hoJpiSbBSqEm2AKZs3kjgHI0U/FK2vKaGKXnVkv9xXgWTKgzKwysv5JenvXXhhJw4LYdlzntRGgFrI= X-Received: by 2002:a05:6402:50d4:b0:451:bf26:8c41 with SMTP id h20-20020a05640250d400b00451bf268c41mr24547198edb.219.1664226147774; Mon, 26 Sep 2022 14:02:27 -0700 (PDT) MIME-Version: 1.0 References: <060F7695-D48E-413C-9501-54ECC651ABEB@cable.comcast.com> <07C46DD5-7359-410E-8820-82B319944618@alum.mit.edu> <39E525B8-D356-4F76-82FF-F1F0B3183908@ieee.org> <498p2p23-on1q-op89-p518-1874r3r6rpo@ynat.uz> In-Reply-To: From: Bruce Perens Date: Mon, 26 Sep 2022 14:02:14 -0700 Message-ID: To: Eugene Y Chang Cc: David Lang , Dave Taht via Starlink Content-Type: multipart/alternative; boundary="0000000000005d483f05e99ad8b3" Subject: Re: [Starlink] It's still the starlink latency... 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: Mon, 26 Sep 2022 21:02:29 -0000 --0000000000005d483f05e99ad8b3 Content-Type: text/plain; charset="UTF-8" On Mon, Sep 26, 2022 at 1:54 PM Eugene Y Chang wrote: > Every node in the path has to implement this to be effective. > It would certainly be optimal if every node implemented it. But any node can detect the endpoint round-trip time, and how it degrades, and thus adjust how fast it feeds packets into the network. And a midpoint can detect when a host is feeding packets too fast for downstream nodes, and send explicit congestion notification, and failing that, drop some packets from that source. --0000000000005d483f05e99ad8b3 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable


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On Mon, Sep 26, 2022 at 1:54 PM Eugen= e Y Chang <eugene.chang@ieee.or= g> wrote:
Every node in the path has to i= mplement this to be effective.

= It would certainly be optimal if every node implemented it. But any node ca= n detect the endpoint round-trip time, and how=C2=A0it degrades, and thus a= djust how fast it feeds packets into the network. And a midpoint can detect= when a host is feeding packets too fast for downstream nodes, and send exp= licit congestion notification, and failing that, drop some packets from tha= t source.
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