From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-la0-x230.google.com (mail-la0-x230.google.com [IPv6:2a00:1450:4010:c03::230]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by huchra.bufferbloat.net (Postfix) with ESMTPS id DE48521F352 for ; Wed, 6 May 2015 16:49:01 -0700 (PDT) Received: by lagv1 with SMTP id v1so18818165lag.3 for ; Wed, 06 May 2015 16:48:59 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=content-type:mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=K2YzRLc3e/PexA3wusOQgaWy2V0mIMUenUCNf4ewwXY=; b=sG+0Erb3NqtB7zh2wDgtbGqDuxeIGuuQJ5Ibkfu1A8WmunuI3UlCyOt+dwq/ZHMkZQ TZGtcVDOzhzGETzFPG2UiM5eZpIVfIg4Jp9q88Jr2h2hk9slMI72QL9q1CvVw2pFVbYn SQK3ckhshzeIEUQlgw0pz/36zW6H+REsnJ5bnFNZFSoebj25zr/cGrB/vvxNRwol8qFm uUNRcFCbHvn9soVI/vsr7ptFRG/QeQ0h9C3VDcFchwI0I9UDXZmKY+iC5PJq3/89/U+H PcS3uMKkxoudBLtD8uRhc4HD8IZToqobECraF6D9RkSfdsaJWsXDkznlf4WIwg/To+Zd PFgw== X-Received: by 10.152.27.98 with SMTP id s2mr882176lag.106.1430956139073; Wed, 06 May 2015 16:48:59 -0700 (PDT) Received: from bass.home.chromatix.fi (188-67-131-101.bb.dnainternet.fi. [188.67.131.101]) by mx.google.com with ESMTPSA id u10sm56461laj.33.2015.05.06.16.48.55 (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Wed, 06 May 2015 16:48:58 -0700 (PDT) Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (Mac OS X Mail 8.2 \(2098\)) From: Jonathan Morton In-Reply-To: Date: Thu, 7 May 2015 02:48:49 +0300 Content-Transfer-Encoding: quoted-printable Message-Id: <6FFE3A76-B4DD-4567-8B4C-AFEE6CA913CB@gmail.com> References: To: Dave Taht X-Mailer: Apple Mail (2.2098) Cc: cake@lists.bufferbloat.net Subject: Re: [Cake] testing cake at 55mbit down/5mbit up X-BeenThere: cake@lists.bufferbloat.net X-Mailman-Version: 2.1.13 Precedence: list List-Id: Cake - FQ_codel the next generation List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 06 May 2015 23:49:30 -0000 > On 5 May, 2015, at 22:43, Dave Taht wrote: >=20 > the diffserv4 thing did not line > up with the markings netperf-wrapper is using for the rrul test. True, but neither does Wi-Fi QoS, which ignores the low-order DSCP bits = and uses only the Precedence ones, with some re-ordering: Precedence 0 & 3 go into BE, 1 & 2 into BK, 4 & 5 into VI, 6 & 7 into VO. Both CS5 and EF therefore fall into the VI (video) queue on Wi-Fi; only = CS6 and above get the VO (voice) queue. This doesn=E2=80=99t make much = sense, which is probably one reason why I ignored that practice when = setting up cake. With cake, CS5 and EF both fall into the "voice" class; CS5 supposedly = corresponds to =E2=80=9Cvoice signalling=E2=80=9D, which is why I put it = there. Cake=E2=80=99s =E2=80=9Cvideo=E2=80=9D class is meant for = applications which need reliable access to bandwidth (eg. streaming = video) rather than especially low latency. Here=E2=80=99s a summary of where all the well-known DSCPs end up on = Wi-Fi and cake: DSCP WiFi Cake =3D=3D=3D=3D =3D=3D=3D=3D =3D=3D=3D=3D CS0 BE BE <- default TOS1 BE VI <- max reliability (legacy) TOS2 BE BE <- max throughput (legacy) TOS4 BE VI <- min delay (legacy) CS1 BK BK <- low priority AF1x BK BE <- high throughput CS2 BK VI <- admin & management AF2x BK VI <- low latency data, ie. database CS3 BE VI <- broadcast video AF3x BE VI <- multimedia streaming, ie. YouTube CS4 VI VO <- realtime interactive, ie. games AF4x VI VI <- multimedia conferencing CS5 VI VO <- signalling VA VI VO <- telephony with capacity reservation EF VI VO <- VoIP and games CS6 VO VO <- network control, ie. NTP CS7 VO VO <- network control, ie. routing - Jonathan Morton