Return-path: Received: from one.firstfloor.org ([213.235.205.2]:43953 "EHLO one.firstfloor.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754053AbZAEOJw (ORCPT ); Mon, 5 Jan 2009 09:09:52 -0500 Date: Mon, 5 Jan 2009 15:23:43 +0100 From: Andi Kleen To: Felix Fietkau Cc: Andi Kleen , Larry Finger , Michael Buesch , linux-wireless@vger.kernel.org, John Linville Subject: Re: rate instability in wireless stack Message-ID: <20090105142343.GS496@one.firstfloor.org> (sfid-20090105_150954_758966_64FE00C6) References: <20090104164649.GV496@one.firstfloor.org> <200901041736.47650.mb@bu3sch.de> <20090104174123.GW496@one.firstfloor.org> <49615465.4090604@lwfinger.net> <20090105025302.GF496@one.firstfloor.org> <49618497.50809@lwfinger.net> <20090105050248.GG496@one.firstfloor.org> <496193A6.3040608@lwfinger.net> <20090105054830.GJ496@one.firstfloor.org> <49620BE5.9030507@openwrt.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii In-Reply-To: <49620BE5.9030507@openwrt.org> Sender: linux-wireless-owner@vger.kernel.org List-ID: On Mon, Jan 05, 2009 at 02:32:21PM +0100, Felix Fietkau wrote: > It looks like mac80211 is not getting proper feedback from the tx > status of the device. Is this with the patch that Larry suggested? > If so, please revert that patch and post an updated version of the > same stats. With Larry's patch reverted. Rate is still at 1Mbit/s of course. This is all only with rtl8180, I didn't try everything on the realtek card too. -Andi rate throughput ewma prob this prob this succ/attempt success attempts TtP 1 0.9 99.2 100.0 1( 1) 23 32 2 0.0 0.0 0.0 0( 0) 0 0 5.5 0.0 0.0 0.0 0( 0) 0 1 11 0.0 0.0 0.0 0( 0) 0 0 6 0.0 0.0 0.0 0( 0) 0 0 9 0.0 0.0 0.0 0( 0) 0 0 12 0.0 0.0 0.0 0( 0) 0 0 18 0.0 0.0 0.0 0( 0) 0 0 24 0.0 0.0 0.0 0( 0) 0 0 36 0.0 0.0 0.0 0( 0) 0 0 48 0.0 0.0 0.0 0( 0) 0 0 54 0.0 0.0 0.0 0( 0) 0 0 Total packet count:: ideal 25 lookaround 1 -- ak@linux.intel.com