From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-11-ewr.dyndns.com (mxout-250-ewr.mailhop.org [216.146.33.250]) by lists.bufferbloat.net (Postfix) with ESMTP id 2F9B72E020D for ; Mon, 28 Feb 2011 05:20:26 -0800 (PST) Received: from scan-12-ewr.mailhop.org (scan-12-ewr.local [10.0.141.230]) by mail-11-ewr.dyndns.com (Postfix) with ESMTP id 70C2892DCED for ; Mon, 28 Feb 2011 13:19:52 +0000 (UTC) X-Spam-Score: 0.1 () X-Mail-Handler: MailHop by DynDNS X-Originating-IP: 75.145.127.229 Received: from gw.co.teklibre.org (75-145-127-229-Colorado.hfc.comcastbusiness.net [75.145.127.229]) by mail-11-ewr.dyndns.com (Postfix) with ESMTP id 0E3BB92DAC0 for ; Mon, 28 Feb 2011 13:19:52 +0000 (UTC) Received: from cruithne.co.teklibre.org (unknown [IPv6:2002:4b91:7fe5:1::20]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "cruithne.co.teklibre.org", Issuer "CA Cert Signing Authority" (verified OK)) by gw.co.teklibre.org (Postfix) with ESMTPS id 942325EA31 for ; Mon, 28 Feb 2011 06:19:51 -0700 (MST) Received: by cruithne.co.teklibre.org (Postfix, from userid 1000) id D88051220AB; Mon, 28 Feb 2011 06:19:50 -0700 (MST) From: d@taht.net (Dave =?utf-8?Q?T=C3=A4ht?=) To: bloat-devel@lists.bufferbloat.net Subject: latency limiting to 4ms? Organization: Teklibre - http://www.teklibre.com Date: Mon, 28 Feb 2011 06:19:50 -0700 Message-ID: <87wrkkpa89.fsf@cruithne.co.teklibre.org> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.1 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-BeenThere: bloat-devel@lists.bufferbloat.net X-Mailman-Version: 2.1.13 Precedence: list List-Id: "Developers working on AQM, device drivers, and networking stacks" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 28 Feb 2011 13:20:26 -0000 I'm about to get on a plane but I saw this thread on lkml go by: http://groups.google.com/group/linux.kernel/browse_thread/thread/b0add1502aafa46f/28dd3798b3d5e4f9?lnk=raot Where the proposed sched_fifo_ewma.c code in that thread: "Well, with 10ms buffer timeout latency goes to 10-20ms on 54Mbit wifi link (zd1211rw driver) from >500ms (ping rtt when iperf running same time). So for that it's good enough. " And, well, I'd like to go for 4ms across the entire transmit range. 10-20ms is *just barely* on the wrong side for voip and audio applications, and the above stat is being measured at 54Mbit. Someone care to leap in over there? -- Dave Taht http://nex-6.taht.net