Return-path: Received: from charlotte.tuxdriver.com ([70.61.120.58]:38267 "EHLO smtp.tuxdriver.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750769AbZAUTPu (ORCPT ); Wed, 21 Jan 2009 14:15:50 -0500 Date: Wed, 21 Jan 2009 14:11:42 -0500 From: "John W. Linville" To: Stefanik =?iso-8859-1?Q?G=E1bor?= Cc: Glenn Burkhardt , Bob Copeland , Nick Kossifidis , linux-wireless@vger.kernel.org Subject: Re: poor performance with ath5k; reverting to ath_pci Message-ID: <20090121191141.GA14710@tuxdriver.com> (sfid-20090121_201555_129077_234A4931) References: <200901140003.31693.gbburkhardt@verizon.net> <200901151734.46144.gbburkhardt@verizon.net> <200901202238.08756.gbburkhardt@verizon.net> <20090121151435.GB3643@tuxdriver.com> <69e28c910901211022j7f9c67dfv6392ce043dcff522@mail.gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 In-Reply-To: <69e28c910901211022j7f9c67dfv6392ce043dcff522@mail.gmail.com> Sender: linux-wireless-owner@vger.kernel.org List-ID: On Wed, Jan 21, 2009 at 07:22:14PM +0100, Stefanik G=E1bor wrote: > On Wed, Jan 21, 2009 at 4:14 PM, John W. Linville > wrote: > > On Tue, Jan 20, 2009 at 10:38:08PM -0500, Glenn Burkhardt wrote: > >> On Friday 16 January 2009 10:33:13 Bob Copeland wrote: > >> > On Thu, Jan 15, 2009 at 5:34 PM, Glenn Burkhardt > >> > > >> > wrote: > >> > > ath5k_pci 0000:00:07.0: PCI INT A -> GSI 18 (level, low) -> IR= Q 18 > >> > > ath5k_pci 0000:00:07.0: registered as 'phy0' > >> > > phy0: Selected rate control algorithm 'pid' > >> > > >> > Can you change the rate control algorithm to minstrel and retry? > >> > >> I built a 2.6.28.1-9 kernel to get the minstrel code for ath5k. T= he > >> kernel for Suse 11.1 is 2.6.27.7-9. But that means that more coul= d have > >> changed besides the rate control code. > >> > >> It looks like minstrel and pid give about the same result, a bit w= orse that > >> the ath_pci driver right now. Performance seems to vary from day = to day. > >> I'll experiment some more, and switch transmission channels. I'm = not getting > >> the really poor performance with ath5k right now. > >> > >> I haven't looked yet - is there a way to switch to 'pid' rate cont= rol without > >> rebuilding the kernel? > > > > If you configure your kernel to include multiple rate control > > algorithms then you can use the 'ieee80211_default_rc_algo' module > > option for mac80211. Of course, changing that only works if you > > rmmod/insmod mac80211. > > > > John >=20 > Judging from this, is it really a good idea to hide pid behind EMBEDD= ED? I've been wondering about that myself. I'm inclined to think no. John --=20 John W. Linville Someday the world will need a hero, and you linville@tuxdriver.com might be all we have. Be ready. -- To unsubscribe from this list: send the line "unsubscribe linux-wireles= s" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html