From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qk1-x730.google.com (mail-qk1-x730.google.com [IPv6:2607:f8b0:4864:20::730]) (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 7B1963CB37 for ; Fri, 26 Jul 2019 09:10:48 -0400 (EDT) Received: by mail-qk1-x730.google.com with SMTP id d15so38934721qkl.4 for ; Fri, 26 Jul 2019 06:10:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=heistp.net; s=google; h=mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=K2Yw0gWIjs4Uy26S9QM7Y5VLeVGCEz3Ft5r2Nnpe+Wc=; b=jI3OMGu6dDBmqqj2M7NF9zKyQ407qAIcccFKZXyn1izssukfyoI+rImGrda/7xKz9m Ls32NodWoDkC04T6xB4bH2KAsXkH4XOgNGIGbu1AkSF9J0KBPVf6+PEx1L4wRrRFWqFr 5O9GyR/G4NqsMNGdA+EZ57kZhARNx8gqyhVXXfi0N2ucTu0+uu1gKW1FjRFunbgGr4OK 181RDG74wnwZtYGyIhBTf21f3R4Fk7CgNezSeJGbSNxszjWThsaOkiT5a3XXTyK3cmBx W3ugl1zlFDwcLbc1nPh49eWFhw5pApjuBYwCt2v03bHjcPOuBneseAjJxo2kbRGEfZ9R 2Oig== 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=K2Yw0gWIjs4Uy26S9QM7Y5VLeVGCEz3Ft5r2Nnpe+Wc=; b=heqZ29ce9Xsrh4h4WmwMFhTt18gtfDQoiAvsC73wv39Q5V9hPkq5ZhLL9fW1gNX00/ L8lZ0J8Td7iEHBpCp3CkLVlnpyuvn62KrChmUeTtB1feb0DlMIVxJKvoR+fydyTdSO2p HzjZ8RINr0n6WJkrvnFsi8DlGZtMV9LrM28152rzLzTn6E1rQi9apEjpEznXXtlSyHAn 1dfFmhcc2HdYlQSZDjIMN+K+WQX7M+wwBJHbOn3cnD9rkMOg4T+fdKHRUzaXIU8DzbGQ HKEagEE+YQzMWo4xZhfLPBmKai+t9oS7kStkSBdJwPuiMyXtXFPrBQ7/VRKX0dscp90S 9mRQ== X-Gm-Message-State: APjAAAUQjwASvzClMc+3zj5oaDBs9M3zmnr/0BIKzZCtKNAUG1QWjF6B Q71fY+eAU3nHj4vmS5FesWJFug== X-Google-Smtp-Source: APXvYqy8fzs4vCFd+wL24fXflbKQ7ylwKinb27gOGd91r4m+Md3TC2ATBOSFtzfUmuy4bRnFYfjEgg== X-Received: by 2002:a37:b646:: with SMTP id g67mr61244378qkf.92.1564146648070; Fri, 26 Jul 2019 06:10:48 -0700 (PDT) Received: from yoda-3.lan (173-246-8-242.qc.cable.ebox.net. [173.246.8.242]) by smtp.gmail.com with ESMTPSA id b5sm22250727qkk.78.2019.07.26.06.10.47 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 26 Jul 2019 06:10:47 -0700 (PDT) Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (Mac OS X Mail 11.5 \(3445.9.1\)) From: Pete Heist In-Reply-To: Date: Fri, 26 Jul 2019 09:10:46 -0400 Cc: "ecn-sane@lists.bufferbloat.net" , "tsvwg@ietf.org" Content-Transfer-Encoding: quoted-printable Message-Id: 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> <3EB0D59D-69A7-4730-BCDF-10E5C61EF987@heistp.net> To: "De Schepper, Koen (Nokia - BE/Antwerp)" 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: Fri, 26 Jul 2019 13:10:48 -0000 > On Jul 25, 2019, at 12:14 PM, De Schepper, Koen (Nokia - BE/Antwerp) = wrote: >=20 > We have the testbed running our reference kernel version 3.19 with the = drop patch. Let me know if you want to see the difference in behavior = between the =E2=80=9Cgood=E2=80=9D DCTCP and the =E2=80=9Cdeteriorated=E2=80= =9D DCTCP in the latest kernels too. There were several issues = introduced which made DCTCP both more aggressive, and currently less = aggressive. It calls for better regression tests (for Prague at least) = to make sure it=E2=80=99s behavior is not changed too drastically by new = updates. If enough people are interested, we can organize a session in = one of the available rooms. > =20 > Pete, Jonathan, > =20 > Also for testing further your tests, let me know when you are = available. Regarding testing, we now have a five node setup in our test environment = running a mixture of tcp-prague and dualq kernels to cover the scenarios = Jon outlined earlier. With what little time we=E2=80=99ve had for it = this week, we=E2=80=99ve only done some basic tests, and seem to be = seeing behavior similar to what we saw at the hackathon, but we can = discuss specific results following IETF 105. Our intention is to coordinate a public effort to create reproducible = test scenarios for L4S using flent. Details to follow post-conference. = We do feel it=E2=80=99s important that all of our Linux testing be on = modern 5.1+ kernels, as the 3.19 series was end of life as of May 2015 = (https://lwn.net/Articles/643934/), so we'll try to keep up to date with = any patches you might have for the newer kernels. Overall, I think we=E2=80=99ve improved the cooperation between the = teams this week (from zero to a little bit :), which should hopefully = help move both projects along...=