From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pz0-f43.google.com (mail-pz0-f43.google.com [209.85.210.43]) (using TLSv1 with cipher RC4-MD5 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority" (verified OK)) by huchra.bufferbloat.net (Postfix) with ESMTPS id 734BB20064E for ; Sun, 13 May 2012 23:00:59 -0700 (PDT) Received: by dajz8 with SMTP id z8so8822071daj.16 for ; Sun, 13 May 2012 23:00:58 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=message-id:date:from:user-agent:mime-version:to:subject:references :in-reply-to:content-type:content-transfer-encoding; bh=gT+9JwpXOYP059frYJ6WZDE1uwUNUiRmmZxuS+vywLE=; b=KcQuwh5FXUAB02tlIeOD6TQeZ7QClL75nNSyyU5xOKiI6/05P4wZ3mYIY/OSuB50xk IJA0G58ES6w5OknY/K5hATHfDCBz5MWVC+00qf70Mb+7Mi6ex6hJIjamHbaSGRw5oFMz Wq1Hhozb421bIvO2RZRlBPPXJ+YbOsVVZktrAGsMlUSOFr0Ezw/2EtNBAgIFzljbBq/2 zvf/wIrZHdte0f9nls7dm7JtoR1JEaC+ldF/VgkXd+M/e/jm0UYSyi598raPgQZdc7Gk 1nihaCRDvNBKlFxc+29tPKFV7IctLd4KZckrGBViWcSy/J+XSbeo44K+Get9uvtMGfja 8o/w== Received: by 10.68.225.198 with SMTP id rm6mr19044423pbc.89.1336975258443; Sun, 13 May 2012 23:00:58 -0700 (PDT) Received: from ?IPv6:2001:4f8:3:203::c001? ([2001:4f8:3:203::c001]) by mx.google.com with ESMTPS id o9sm21214110pbe.60.2012.05.13.23.00.46 (version=SSLv3 cipher=OTHER); Sun, 13 May 2012 23:00:57 -0700 (PDT) Message-ID: <4FB09F8D.6070403@gmail.com> Date: Sun, 13 May 2012 23:00:45 -0700 From: dave taht User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:11.0) Gecko/20120410 Thunderbird/11.0.1 MIME-Version: 1.0 To: codel@lists.bufferbloat.net References: <1336855256.31653.1329.camel@edumazet-glaptop> <20120512.164513.1156706853054390966.davem@davemloft.net> <1336859324.31653.1385.camel@edumazet-glaptop> <20120512.175217.1632102067268101115.davem@davemloft.net> <1336893803.8512.43.camel@edumazet-glaptop> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Subject: Re: [Codel] [PATCH net-next] codel: use Newton method instead of sqrt() and divides 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: Mon, 14 May 2012 06:00:59 -0000 I am sitting here with the latest fq_codel implementation on cerowrt, and this new 16 bit change. With either interface, running netserver on the router, I get ~260Mbit/sec out of it, with fq_codel on. It's quite marvelous, as ping times stay in the 2-3ms range... Running traffic through the router with two fq_codels is another story. I get only 91.6Mbit out of it (and the cpu on the router is loafing). I was rather puzzled as this is sooclose to 100Mbit as for me to assume that I had goofed and was running at line rate, but no, I'm at gigE on both sides. A) Scheduler granularity? HZ_256 and NO_HZ here. Not sure of the clock res B) The new error in the new sqrt routine actually significant enough to show up I will try a 20ms target and revert to the previous fuller precision version. I wish I had data on the previous version but was battling an entirely different bug, then. Has anyone hooked up a chain of codel ns3 sims to each other? Or a few gigE boxes through each other? > _______________________________________________ > Codel mailing list > Codel@lists.bufferbloat.net > https://lists.bufferbloat.net/listinfo/codel