Return-path: Received: from mail-pz0-f194.google.com ([209.85.222.194]:49457 "EHLO mail-pz0-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750972Ab0CHFlp convert rfc822-to-8bit (ORCPT ); Mon, 8 Mar 2010 00:41:45 -0500 Received: by pzk32 with SMTP id 32so2465401pzk.4 for ; Sun, 07 Mar 2010 21:41:44 -0800 (PST) MIME-Version: 1.0 In-Reply-To: <70f6a1ed1003072120w37fa176ya2c3a8af742dfd97@mail.gmail.com> References: <4B93F42F.7030306@openwrt.org> <70f6a1ed1003072120w37fa176ya2c3a8af742dfd97@mail.gmail.com> Date: Sun, 7 Mar 2010 21:36:27 -0800 Message-ID: <70f6a1ed1003072136r6f78a969k8847736e210ba7f7@mail.gmail.com> Subject: Re: [RFC v3] minstrel_ht: new rate control module for 802.11n From: Duy Nguyen To: Felix Fietkau Cc: linux-wireless , Derek Smithies , Benoit PAPILLAULT , "Luis R. Rodriguez" , Christian Lamparter , =?ISO-8859-1?Q?Bj=F6rn_Smedman?= , Bob Copeland Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-wireless-owner@vger.kernel.org List-ID: After many more runs on scenario 2, it is on par with atheros default. Sorry for the earlier hasty reporting. scenario 2: node 1 to node 2 802.11n Felix's Minstrel Avg Transfer= 95.5 Avg Bandwidth=80.11 802.11n Atheros Default Avg Transfer= 95.2 Avg Bandwidth=79.8 On Sun, Mar 7, 2010 at 9:20 PM, Duy Nguyen wrote: > Hi Felix, thanks for the awesome patch and great progress on the > 802.11n! ?I just tried out your patch version 3, and got the following > results. > > The results are an average of 10 different iperf runs, Throughputs are > in Mbits/sec > AP: dir-615 (settings: 802.11n mode only, Auto 20/40 Mhz). ?This AP > does not seem to allow me to set 40Mhz only > Node interfaces: ?D-Link DWA-556 Xtreme N PC > > > scenario 1: node 1 to node 2 > > node1-----wireless_link-----AP-----wireless_link-----node2 > > 802.11n Felix's Minstrel ? ?Avg Transfer= 38.6 ?Avg Bandwidth=32.3 > 802.11n Atheros Default ? ?Avg Transfer= 36.6 ?Avg Bandwidth=30.6 > > scenario 2: node 1 to node 2 > > node1-----wireless_link-----AP-----wired_link-----node2 > > 802.11n Felix's Minstrel ? ?Avg Transfer= 83.4 ?Avg Bandwidth=69.8 > 802.11n Atheros Default ? ?Avg Transfer= 95.2 ?Avg Bandwidth=79.8 > > Overall, the results look pretty good. ?I am much more interested in > results in scenario 1 but I am going to take a look at scenario 2 > again. ?Let me know if I can help you test any other scenarios. > > Duy > > > On Sun, Mar 7, 2010 at 10:45 AM, Felix Fietkau wrote: >> Here's v3 of minstrel_ht. >> >> Changelog: >> >> v3: >> - Add two fixes by Christian Lamparter (division by zero, debugfs mcs >> ?rate display) >> - Improve throughput a bit more by spreading out slow rate sampling >> ?attempts over multiple sampling intervals >> >> v2: >> - Use accurate A-MPDU statistics from tx feedback >> - Rewrite the sampling algorithm to optimize for good A-MPDU lengths >> ?and faster throughput recovery >> - Implement .rate_update to handle changes in HT capabilities or >> ?channel bandwidth >> - Remove the private tx flags hack >