Return-path: Received: from mail-we0-f174.google.com ([74.125.82.174]:42246 "EHLO mail-we0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751804Ab2BQIui (ORCPT ); Fri, 17 Feb 2012 03:50:38 -0500 Received: by werb13 with SMTP id b13so1679307wer.19 for ; Fri, 17 Feb 2012 00:50:37 -0800 (PST) Message-ID: <4F3E14D9.2010204@openwrt.org> (sfid-20120217_095042_936348_979ACF0D) Date: Fri, 17 Feb 2012 09:50:33 +0100 From: Florian Fainelli MIME-Version: 1.0 To: Stanislaw Gruszka CC: Helmut Schaa , "linux-wireless@vger.kernel.org" , users@rt2x00.serialmonkey.com, gwingerde@gmail.com, Ivo Van Doorn , Andreas Hartmann Subject: Re: Poor RT2880 performance References: <4F390ED3.8010400@openwrt.org> <4F3961FB.7020409@openwrt.org> <20120216130020.GG25833@redhat.com> In-Reply-To: <20120216130020.GG25833@redhat.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Sender: linux-wireless-owner@vger.kernel.org List-ID: Hello Stanislaw, Le 02/16/12 14:00, Stanislaw Gruszka a ?crit : > On Mon, Feb 13, 2012 at 08:18:19PM +0100, Florian Fainelli wrote: >> Le 02/13/12 14:45, Helmut Schaa a ?crit : >>> On Mon, Feb 13, 2012 at 2:23 PM, Florian Fainelli wrote: >>>> I am playing with a RT2880-F based AP, with a N connected station, in a >>>> residential environment. >>> Mind to provide the RF and RT chipset identifications? rt2x00 should print them >>> out during module load (at least when compiled with debugging options). >> Sure, here are the HW infos of the AP: >> Ralink RT2880 id:1 rev:1 running at 266.66 MHz >> phy0 -> rt2x00_set_chip: Info - Chipset detected - rt: 2860, rf: >> 0001, rev: 0101. > Did you try to revert commit (if you use kernel, which include it) ? > > commit f0425beda4d404a6e751439b562100b902ba9c98 > Author: Felix Fietkau > Date: Sun Aug 28 21:11:01 2011 +0200 > > mac80211: retry sending failed BAR frames later instead of tearing > > It was already identified that it couse performace issues on rt2860 > based APs. Indeed, that seems to give me much better throughput, now I am around 45Mbits/sec in HT20 and 64Mbits/sec in HT40+. On a crowded channel, I could get 20Mbits/sec compared to the previous 5Mbits/sec. Do you know what could be the fix for RT2860 not to be impacted by this change or play nicely with it? Thanks. -- Florian