From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wr0-x231.google.com (mail-wr0-x231.google.com [IPv6:2a00:1450:400c:c0c::231]) (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 E06313B2A4 for ; Fri, 10 Feb 2017 06:08:46 -0500 (EST) Received: by mail-wr0-x231.google.com with SMTP id o16so105281061wra.1 for ; Fri, 10 Feb 2017 03:08:46 -0800 (PST) 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=Zo5cn7iiEonZ9+gD/kRWLNbiCPtIdOx9q9F+bjnWlLU=; b=QSMSwvKGjXlwvGD2clTZcDuAp2325tqv7RpgKThuEWWexC6M2WvrfNmn0VOzBReNl4 kezHJlcEuYDd5JbIwZoEvOQW6ZrHO4SFDZpyX38vvhx1vzc/4VyJmn/uyBhovUoVUP8B vYtNPMKspgxvB0UzAZFwIpQlciU6oEbEPEaTiwamkR1XMIxZeyxwL6q9VY6/T9ruOakl CHQVBiH7u2vymx8l814+hafl3ThZ097Jl/iDpdVTmCXp9RQTYamfCxQqlpmWxdA1sRe6 8rJJuaQDnPHrmVsPVFGcZ7BJgpLr0TGIXoPzq1aC4qV4urDZviHv5mAKRysoAXC1t4UQ VKqA== 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=Zo5cn7iiEonZ9+gD/kRWLNbiCPtIdOx9q9F+bjnWlLU=; b=MgDD7X5qWkd3kU46n0EfTiqcd/U0UCfn2ia4oBwY0Ern9KXe2E+jAefN/eC2OfN83/ q+jBz6SjeW605A3nVIENCZkGUv08gba1LPupZzVeXbYelvLP9u7/rGWT7XCq/y6Di7aq Y1fYbknhiTjDiRMobGWwNJ+R7glRSVl32S1HQaG4+evaGcYlYJ2zSOAGZ05nY0qppv2r rM0DBsqb0AH3yDE2Tc4xY3aVbvvw9da9oTP6+1FWvAe7bft2eCTUUprS5RU3865OyWM2 K8W4R1A7rTPKoHII/lS6G5KWepbIN5oTv6JsQlIUqzP/SP5jGjOTSNrMDUDOhNiZ3wIa GFAg== X-Gm-Message-State: AMke39lRqJh7AngT9LCeTtfdSOL85DFodmwLQrL+XuO8oKecZCqvTsnovOoVxWDW1gF8TA== X-Received: by 10.223.178.243 with SMTP id g106mr8208299wrd.32.1486724925380; Fri, 10 Feb 2017 03:08:45 -0800 (PST) Received: from [10.72.0.34] (h-1169.lbcfree.net. [185.99.119.68]) by smtp.gmail.com with ESMTPSA id e72sm1043923wma.16.2017.02.10.03.08.44 (version=TLS1 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Fri, 10 Feb 2017 03:08:44 -0800 (PST) Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (Mac OS X Mail 9.3 \(3124\)) From: Pete Heist In-Reply-To: <856BB65A-569E-4633-B104-5E3BD15B649F@gmail.com> Date: Fri, 10 Feb 2017 12:08:48 +0100 Cc: cake@lists.bufferbloat.net Content-Transfer-Encoding: quoted-printable Message-Id: References: <459B9F17-317F-465E-8D2F-361CF47E5F32@gmail.com> <3D9E1A43-0182-4A1F-8262-6F587A79254E@gmail.com> <830143EE-20F2-42A5-A4FC-ECE7DF50C632@gmail.com> <652AA7A2-60C5-460F-AE60-CF4CB1D1D781@gmail.com> <5BE2A225-4B9C-4F0F-ACC5-C23CCC873DF5@gmail.com> <4B18C549-4CEF-4275-B9B3-CB8A046EB4EC@gmail.com> <856BB65A-569E-4633-B104-5E3BD15B649F@gmail.com> To: Jonathan Morton X-Mailer: Apple Mail (2.3124) Subject: Re: [Cake] Cake latency update X-BeenThere: cake@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: Cake - FQ_codel the next generation List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 10 Feb 2017 11:08:47 -0000 > On Feb 10, 2017, at 11:31 AM, Jonathan Morton = wrote: >=20 >=20 >> On 10 Feb, 2017, at 12:05, Pete Heist wrote: >>=20 >> It means that both the ingress and egress have been redirected over = the same IFB device and QoS'd together. >=20 > Okay, I guessed as much but wanted to be sure. >=20 > I can=E2=80=99t think of any theoretical reason for these results. = Cake=E2=80=99s flow isolation should be robust enough to cope = transparently with bidirectional traffic in half-duplex mode. As you = say, a C2D should easily be able to keep up, and at these modest rates I = can even discount PCI bandwidth as a concern. So I might need to try to = reproduce it here. >=20 > Does the problem go away if you use a wired link with the same setup = otherwise? Or is that inconvenient to try? I have some ath9k equipped = machines, but they would need to be set up. Not a problem. I=E2=80=99ll run a spread of Cake and fq_codel over = Ethernet at various bandwidths. It will be through their Apple USB = Ethernet adapters (used now for management), which are also connected = through a switch, but I think that setup should be fine for this = purpose. Should be done in a hour or so and we=E2=80=99ll see=E2=80=A6 Pete