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[173.246.8.242]) by smtp.gmail.com with ESMTPSA id j13sm12206559vkc.26.2019.07.22.12.48.12 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 22 Jul 2019 12:48:13 -0700 (PDT) From: Pete Heist Message-Id: <3EB0D59D-69A7-4730-BCDF-10E5C61EF987@heistp.net> Content-Type: multipart/alternative; boundary="Apple-Mail=_04C58758-B614-4707-AE90-C6E883F70427" Mime-Version: 1.0 (Mac OS X Mail 11.5 \(3445.9.1\)) Date: Mon, 22 Jul 2019 15:48:11 -0400 In-Reply-To: Cc: Jonathan Morton , Bob Briscoe , "ecn-sane@lists.bufferbloat.net" , "Black, David" , "tsvwg@ietf.org" , Dave Taht To: "De Schepper, Koen (Nokia - BE/Antwerp)" References: <364514D5-07F2-4388-A2CD-35ED1AE38405@akamai.com> <1238A446-6E05-4A55-8B3B-878C8F39FC75@gmail.com> <17B33B39-D25A-432C-9037-3A4835CCC0E1@gmail.com> <52F85CFC-B7CF-4C7A-88B8-AE0879B3CCFE@gmail.com> <87ef2myqzv.fsf@taht.net> <803D9CA8-220E-4F98-9B8E-6CE2916C3100@gmail.com> <0079BC6B-4792-48ED-90D3-D9A69407F316@gmx.de> <22af0671-fdd0-0953-fc96-55b34beb0be9@bobbriscoe.net> X-Mailer: Apple Mail (2.3445.9.1) Subject: Re: [Ecn-sane] [tsvwg] Comments on L4S drafts 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: Mon, 22 Jul 2019 19:48:14 -0000 --Apple-Mail=_04C58758-B614-4707-AE90-C6E883F70427 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=utf-8 > On Jul 22, 2019, at 2:15 PM, De Schepper, Koen (Nokia - BE/Antwerp) = wrote: >=20 > - related to the flent testing, you might have expected to find big = differences, but both measurements showed exactly the same results. I = understood you need to extent your tools to get more measurement = parameters included which were missing compared to ours. On this point, this morning the ability to start multiple ping flows = with different tos values for each was already added to flent (thanks to = Toke), so that we can measure inter-flow latency separately for the = classic and L4S queues. We added a few related plots to use this new = feature. Since 104, development and testing of SCE has been our focus, but work = on testing and interop with L4S has begun. We have built the TCP Prague = and sch_dualpi2 repos for use in our testbed. Some documentation on = setup, including which kernels from which repos need to be deployed in = which part of a dumbbell setup, and for example, what if any = configuration is, like new sysctls or sysctl values, could be helpful. = We have added some documentation to the README of our repo = (https://github.com/chromi/sce/ ). To editorialize a bit, I think we=E2=80=99re both aware that testing = congestion control can take time and care. I believe that together we = can figure out how to improve congestion control for people that use the = Internet, and the different ways that they use it. We=E2=80=99ll try to = think about them first and foremost. :) --Apple-Mail=_04C58758-B614-4707-AE90-C6E883F70427 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=utf-8
On = Jul 22, 2019, at 2:15 PM, De Schepper, Koen (Nokia - BE/Antwerp) <koen.de_schepper@nokia-bell-labs.com> wrote:

- related to the flent = testing, you might have expected to find big differences, but both = measurements showed exactly the same results. I understood you need to = extent your tools to get more measurement parameters included which were = missing compared to ours.

On this point, this morning the ability to start = multiple ping flows with different tos values for each was already added = to flent (thanks to Toke), so that we can measure inter-flow latency = separately for the classic and L4S queues. We added a few related plots = to use this new feature.

Since 104, = development and testing of SCE has been our focus, but work on testing = and interop with L4S has begun. We have built the TCP Prague and = sch_dualpi2 repos for use in our testbed. Some documentation on setup, = including which kernels from which repos need to be deployed in which = part of a dumbbell setup, and for example, what if any configuration is, = like new sysctls or sysctl values, could be helpful. We have added some = documentation to the README of our repo (https://github.com/chromi/sce/).

To editorialize a bit, I think we=E2=80=99re both = aware that testing congestion control can take time and care. I believe = that together we can figure out how to improve congestion control for = people that use the Internet, and the different ways that they use it. = We=E2=80=99ll try to think about them first and foremost. = :)

= --Apple-Mail=_04C58758-B614-4707-AE90-C6E883F70427--