From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ob0-x234.google.com (mail-ob0-x234.google.com [IPv6:2607:f8b0:4003:c01::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 062413CB82; Sat, 6 Feb 2016 14:50:45 -0500 (EST) Received: by mail-ob0-x234.google.com with SMTP id is5so115071423obc.0; Sat, 06 Feb 2016 11:50:45 -0800 (PST) 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=vkZupS6KsiobEEl05BpUwt/o0/fDQ4nmb9bbAfYWfhU=; b=BnJazASY23bs91s6KzKkz0vEFeS5B8O4QFuGp1QYNzoKXr4NYfnr5ggDEg6KqPcDwn a18zLSjvP6g+vMpuQV+h3TJpNapu9/0goCby3Y2Sr2zG2tkpGzv667BPli6o5Ilkth0L jR5uMNyGmc2rCPg4lbDQXg/5KRcf6gOeRHlKC4gFkmazk9McUjYff3/q0t0zuK9ZQ4EM mTgDcpSsAmd6UDzbDQxi+7GitNtY2x5MgDzfB6vUuhlQ+Wm+g+LDsQpJGk2DgyQwDMED WJChl93Z4NGnzjD2wK1DNdwm1VLH8xXSeVA7ToQhnyjX8ZC846OUDwDiVhiSsPR/nM4F WyVA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:content-type:mime-version:subject:from :in-reply-to:date:cc:content-transfer-encoding:message-id:references :to; bh=vkZupS6KsiobEEl05BpUwt/o0/fDQ4nmb9bbAfYWfhU=; b=dJt8buUsJ5oIAa+XS0MNDpZ1rwUSpVlRhU1LLb6X71NFtqIK3R0AauAZAT6rfuxAnd rMyZMvZx63BcPQvIE2Wh5qOHDZ2W1i4ru1E174kNQzEXCpbEJn5bz2A/AqefX1W+pXI9 k0C+k5jCuMudPNcZ26wcwKrthIJmgmfSUK85k0Mgzh+CWFVU4Ph6iM3zyFWpPRiJB9tb AQ5E9EXJcRIbUx7ruhKHt3+S0fq+cDQ5ddoHGjWxsJlMKB3ra3Ud6WI16GvldRtPP2jc tstatjTBxHSqGM+VGYurOMvPJJFpDdwEpmwlYfQZQXj+42deM7WlXtePMWJULHGfW99c +fqw== X-Gm-Message-State: AG10YOQRbZX6ggO/V0aO3z48c3ClB1lj0pOWPwQWJ+jhDLzyGt5JeggfPDnOvS5jEeHSFQ== X-Received: by 10.182.125.129 with SMTP id mq1mr17138338obb.7.1454788243905; Sat, 06 Feb 2016 11:50:43 -0800 (PST) Received: from [172.16.50.197] (c-174-52-238-71.hsd1.ut.comcast.net. [174.52.238.71]) by smtp.gmail.com with ESMTPSA id u8sm12297295obf.5.2016.02.06.11.50.41 (version=TLSv1/SSLv3 cipher=OTHER); Sat, 06 Feb 2016 11:50:42 -0800 (PST) Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (Mac OS X Mail 8.2 \(2104\)) From: Trevor Paskett In-Reply-To: <56B635A1.8080603@taht.net> Cc: make-wifi-fast@lists.bufferbloat.net, cerowrt-devel@lists.bufferbloat.net Content-Transfer-Encoding: quoted-printable Message-Id: <66535894-9843-40F6-B78E-3D6E2D22613A@gmail.com> References: <56AA90C9.6050504@taht.net> <56B0FE22.3050704@taht.net> <73AA134D-76DC-4D37-94F0-CC3C4FEAF5C6@gmail.com> <56B12DE1.8040009@taht.net> <79F77DD2-2BFF-4697-A118-25D17FD06CBB@gmail.com> <56B15105.7040405@taht.net> <0BAB0F1C-9F93-4579-9426-648CBE1EF5D5@gmail.com> <56B63105.5060909@taht.net> <56B635A1.8080603@taht.net> To: =?utf-8?Q?Dave_T=C3=A4ht?= X-Mailer: Apple Mail (2.2104) X-Mailman-Approved-At: Wed, 16 Mar 2016 11:41:57 -0400 Subject: Re: [Make-wifi-fast] AREDN and Make Wifi Fast X-BeenThere: make-wifi-fast@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Date: Sat, 06 Feb 2016 19:50:46 -0000 X-Original-Date: Sat, 6 Feb 2016 12:50:40 -0700 X-List-Received-Date: Sat, 06 Feb 2016 19:50:46 -0000 Thanks for the info, we will test these changes in our lab. With wifi are you using fq_codel alone or with htb? If with htb how are = you determining the rates to use? If you could share the tc / iptables commands you are using in the = yurtlab that would help alot. > On Feb 6, 2016, at 11:04 AM, Dave T=C3=A4ht wrote: >=20 > The simplest thing you can do today to improve latency on your ath9k > devices is to disable wmm (802.11e), and to reduce the ath9k driver > queues to smaller sizes. I typically run the yurtlab network with a > qlen_be of 12 (slow links) to 24 rather than the default. >=20 > On links with significant speed issues, congestion or interference, I > typically increase the fq_codel target to 20ms. >=20 > We have fiddled with using large quantums with per-dst FQ on ptp links > with some success on top of that. >=20 > In all cases it helps to have a set of flent runs for each change. > Throughput will drop, fairness and latency will improve. The yurtlab > userbase is generally oblivious to a speed problem, it's having low > latency for gaming, dns, and basic web traffic that works for them. >=20 > None of the above are "optimal" fixes in any way, but perhaps you will > get some use from them.