From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-we0-f171.google.com (mail-we0-f171.google.com [74.125.82.171]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority" (verified OK)) by huchra.bufferbloat.net (Postfix) with ESMTPS id 029F0201AF7 for ; Mon, 21 May 2012 17:27:34 -0700 (PDT) Received: by wejx9 with SMTP id x9so7400015wej.16 for ; Mon, 21 May 2012 17:27:32 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type:content-transfer-encoding; bh=KU2OeTnfIqhKwrzGOi/xKhtXV3dPUjjIZEZwkx1m5Ro=; b=kfbyzXevosJkXOEr2kHJbu7nRXsAy+zGCAJynPt4diN7bQMCRvsrdZq64/UmUPy9m3 D8WaHNy0VT+WdUxj7jpgI2Mo2jtxXOO1fyTv8XjSIRkwcOG1mH7lqZSUIWsSSoEUewvP 4tmj+A7+r+s8UI//sR+RfUOkjBU8G/YlGlYXXizCb5dGkL5kbUp1Tt7JXfFVtK/J6jBL CN4TGi4sCRBHoFmBrrRQqPh1o8Ouf7a6JXLPXZU3ev+GVx3ObB1Qipbafr8VrDCmk5Fe 58rJOaUgqclHYI1pxvSJCstBs7C2V6BtwmOZrY8cNUsgs8+75ORV0icUavSSCWKvzoaq MQ7Q== MIME-Version: 1.0 Received: by 10.180.88.233 with SMTP id bj9mr29569967wib.1.1337646452667; Mon, 21 May 2012 17:27:32 -0700 (PDT) Received: by 10.223.115.9 with HTTP; Mon, 21 May 2012 17:27:32 -0700 (PDT) In-Reply-To: <20120521214935.GA28713@yumi.tdiedrich.de> References: <20120520212944.GK22418@yumi.tdiedrich.de> <20120521003115.GO22418@yumi.tdiedrich.de> <4FBA7A57.7010709@hp.com> <20120521214935.GA28713@yumi.tdiedrich.de> Date: Tue, 22 May 2012 01:27:32 +0100 Message-ID: From: Dave Taht To: Tobias Diedrich Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Cc: codel@lists.bufferbloat.net, OpenWrt Development List Subject: Re: [Codel] BQL support in Ethernet drivers (and Kathie Nichols and Van Jacobson's new AQM, codel) X-BeenThere: codel@lists.bufferbloat.net X-Mailman-Version: 2.1.13 Precedence: list List-Id: CoDel AQM discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 22 May 2012 00:27:36 -0000 In looking over your test scripts and results, it seems possible you have gso on. ethtool -K the_device tso off ethtool -K the_device gso off ethtool -K the_device ufo off Secondly, in the 100Mbit and below case, I have found BQL's estimates to be persistently on the high side, and have generally found that a byte queue limit of 3000 or 4500 produces optimal, consistent results. Usually 1500 causes starvation. YMMV. On Mon, May 21, 2012 at 10:49 PM, Tobias Diedrich wrote: > Rick Jones wrote: >> On 05/20/2012 08:48 PM, Dave Taht wrote: >> >Thx for the numbers! >> > >> >Could you do a TCP_RR while under load from UDP_STREAM? >> >> If you want to generate pretty pictures while doing so, you can >> probably tweak >> http://www.netperf.org/svn/netperf2/trunk/doc/examples/bloat.sh > > How about this: > http://tdiedrich.de/~ranma/bufferbloat-rt3050/ > > -- > Tobias =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 = =A0 =A0 =A0 =A0 =A0PGP: http://8ef7ddba.uguu.de --=20 Dave T=E4ht SKYPE: davetaht US Tel: 1-239-829-5608 http://www.bufferbloat.net