From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-lj1-x234.google.com (mail-lj1-x234.google.com [IPv6:2a00:1450:4864:20::234]) (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 12F633CB35 for ; Fri, 5 Apr 2019 12:20:03 -0400 (EDT) Received: by mail-lj1-x234.google.com with SMTP id h16so5741705ljg.11 for ; Fri, 05 Apr 2019 09:20:02 -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=DfRPD4Lng/TLo2zM0ncjMTiAuPRil/BFPXwjXI/JUmw=; b=J0Ye1tflmasixoVFFT2GrmG1c69OCsbTVghUpW611PRHfqRWyhy6KjdOExKEZDy18B beb+YHx1HuNsNS01EJAufLF3UEvsRQdkxn/4j/YswibspgoxYFF9vqBcL10bF3IFyKvV FBMTKlrgE28mF2ifgQZSzYDMmgQS9pSRNjzq6uf05Za0aA88wWvnzcj30nOkPBZnXD6X hQCZZtAQ55/tsGlnAbtWQxFZePD4BnjtfIz8HgPC7wcFdz24xt2GHeSpmzaUBtsSyTl7 Kk0WlW41s8Ka9Ryt0xBXiVOUBaKg+RHVi8ZhFejE+lwXL9Bg4hdQzAMYvN6MPy0AVy9l h2ug== 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=DfRPD4Lng/TLo2zM0ncjMTiAuPRil/BFPXwjXI/JUmw=; b=QwfyEAtDYyatq0AlzU5UKtb9ijVe26keSTrTgpfmQEgliXdabC7ZSypm4His2tOeKU P1Ge3Lj91/+hn/e5fjFD+9BakZ2VcFUAIIJr/Ahsjy9p7AsrLdeK3jOeLgK0o3IDIReB q/SBa1sxOZzNB4l4Wiv0xKpSPLjtdSCBeo6ycirC1CKL8DOfzc+jddrfBZvSaxY/41XP lO8fbw0s9kXUrDsckyybQO4DCNYYHpLKX3TeuRJpzTUaQBpbzWoUcxJFfNFkonn+5Esy D/23geA4yutQ4mNSSnx4UzFZeCYp8Qfl+BpHGXAlGUZRA58cSJZpmkoA6stn5mvidTlz kL2w== X-Gm-Message-State: APjAAAW+pKI/HXJWhtw8aMWQLPGkxlb5lJUWWmZGC6TCQtIQD5gZD5Un rkjHwPriM1C7wV6Ag4qH9e8= X-Google-Smtp-Source: APXvYqwVx39FrBPplcdDWOOFgMkQ2pzTGpKDCb+qdGxHF16BF0JoBa0rQGtXTcYDb4Ck15kuo3vYJg== X-Received: by 2002:a2e:3204:: with SMTP id y4mr3627514ljy.90.1554481201964; Fri, 05 Apr 2019 09:20:01 -0700 (PDT) Received: from jonathartonsmbp.lan (83-245-225-56-nat-p.elisa-mobile.fi. [83.245.225.56]) by smtp.gmail.com with ESMTPSA id l14sm4430187lfk.92.2019.04.05.09.20.01 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 05 Apr 2019 09:20:01 -0700 (PDT) Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 11.5 \(3445.9.1\)) From: Jonathan Morton In-Reply-To: Date: Fri, 5 Apr 2019 19:20:00 +0300 Cc: Dave Taht , ECN-Sane , BBR Development , flent-users Content-Transfer-Encoding: quoted-printable Message-Id: <3EDC8EAC-1EB2-4E64-8973-8AE177D8789C@gmail.com> References: To: Neal Cardwell X-Mailer: Apple Mail (2.3445.9.1) Subject: Re: [Ecn-sane] [bbr-dev] duplicating the BBRv2 tests at iccrg in flent? 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, 05 Apr 2019 16:20:03 -0000 > On 5 Apr, 2019, at 6:10 pm, 'Neal Cardwell' via BBR Development = wrote: >=20 > Right. I didn't mean setting the codel target to 242us. Where the = slide says "Linux codel with ECN ce_threshold at 242us sojourn time" I = literally mean a Linux machine with a codel qdisc configured as: >=20 > codel ce_threshold 242us I infer from this that BBR's new ECN support won't work properly with = standard CE marking behaviour, only with the sort of signal that DCTCP = requires. Is that accurate? SCE allows providing that sort of high-fidelity congestion signal = without losing interoperability with RFC-3168 compliant flows. - Jonathan Morton