Return-path: Received: from mail-fx0-f168.google.com ([209.85.220.168]:44776 "EHLO mail-fx0-f168.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751190AbZEYMmJ (ORCPT ); Mon, 25 May 2009 08:42:09 -0400 Subject: Re: [2.6.27-rc7 vs 2.6.29 Regresion] Wifi Network Slownes rt2500pci From: Alejandro Riveira =?ISO-8859-1?Q?Fern=E1ndez?= Reply-To: alejandro.riveira@gmail.com To: Ivo van Doorn Cc: linux-wireless , linux-kernel , linville@tuxdriver.com, Greg KH , "Rafael J. Wysocki" In-Reply-To: <200905251323.07845.IvDoorn@gmail.com> References: <1243247687.5322.8.camel@varda> <200905251323.07845.IvDoorn@gmail.com> Content-Type: multipart/signed; micalg="pgp-sha1"; protocol="application/pgp-signature"; boundary="=-Tar+kO1GraXSYPlLpSIw" Date: Mon, 25 May 2009 14:42:06 +0200 Message-Id: <1243255326.6297.53.camel@varda> Mime-Version: 1.0 Sender: linux-wireless-owner@vger.kernel.org List-ID: --=-Tar+kO1GraXSYPlLpSIw Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable El lun, 25-05-2009 a las 13:23 +0200, Ivo van Doorn escribi=C3=B3: > On Monday 25 May 2009, Alejandro Riveira Fern=C3=A1ndez wrote: > > I reported it previously but i'm resending it as a regresion > >=20 > > More info on the bugzilla > >=20 > > http://bugzilla.kernel.org/show_bug.cgi?id=3D13362 > >=20 > > I bisected it in the estable tree (it regresses too) and the revert > > helps there but reverting the upstream commit in mainline does not help > > to fix it completely... >=20 > Bug 9273 - rt2500pci: low TCP throughput > http://bugzilla.kernel.org/show_bug.cgi?id=3D9273 >=20 > Bug 443203 - Fedora rawhide + ralink =3D slow bit rate > https://bugzilla.redhat.com/show_bug.cgi?id=3D443203 >=20 > [Hardy][Intrepid] Low bandwidth with rt2400 / rt2500 drivers > https://bugs.launchpad.net/ubuntu/+source/linux/+bug/190515 >=20 > I can't call this a regression, dozens people have reported the problems > ranging from kernels 2.6.25 to 2.6.29. Perhaps in your case it worked sli= ghtly > better once, but that was not the case for all other users. >=20 > Have you tried the "iwconfig wlan0 rate54M" workaround? Yep during various releases I used that workaround but once I switched to minstrel rate choosing alg (that's the neme isn't it) the problem gone away and i got allways a good connection for several releases and many kernels tried; till this patch. If I revert this patch the problem goes away completly and reliably (i'm using 2.6.29.4 with the patch reveted) so something has clearly regressed for me. You can see my coments ( ariveira ) on rt2x00 forums regarding the issues you mention (low speed that gets fixed forcing the rate) in the long thread about rt2500pci low rate[1]. =20 Checking the message i see that it was 2.6.27 when i began using minstrel and got a rock solid connection in 2.6.27.x, 2.6.28.x and 2.6.29 minus 64e1b00c974ddeae6a60ebb02e1c487371905cea The problem is not that I get a low rate on connect (1Mbit) that i can easily fix with iwconfig the problem is that with 54M (and 48M and the like) connections I get a bumpy and low speed connection. =20 So I honesty think it is not the same issue and I hope you read this as an interesting data point and not just as a duplicate. Would the output of this script[2] for 2.6.29.4 with and without the revert help you ? >=20 > Ivo Thanks for the response [1] http://rt2x00.serialmonkey.com/phpBB/viewtopic.php?f=3D5&t=3D4579&start=3D4= 5 [2] http://rt2x00.serialmonkey.com/phpBB/viewtopic.php?f=3D5&t=3D4660=20 --=-Tar+kO1GraXSYPlLpSIw Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Esto es una parte de mensaje firmado digitalmente -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) iQIcBAABAgAGBQJKGpIZAAoJEDO4iEReSTB2uOIQAJS9jIQd3a0T4OzZzF1m7QeY ec3Rdgv3w/bJt7fKiOmq7VPdEyzqFwl4vVKLSdQPE5Um6bwTUMOKf5DWaKSS3zeY nI09ynVi9e453C5Fe4rRoVFh1Fr6VuUhWZR5uQEadywSoi565qF5/kEjFfissvqS KzLTfUj/icX8MaJSPR0MnosLBE9jC+rIRrZ3vTMjdR/6itDcU49iGTy66Yjehv95 4mLTua9TeBostrk5/XoMEy88S2W6xXb6ZigVKS5D9UBYgh3k4ttqbpfIP/C6DUCM ja+z9qtTw3I/oqy7Osp4CjZzOborXLRSp7gXSZrHN4ln5olRA0ylldcii6fIyr9z 1VnN7W2V9eVb07PvJx7aHKcMoLHstM7Jd+iYWT/+4zUPdpD72H+4TxSQu5tdGC+R dvtsgrUdfRNBmdve7SYjlilM1yyLosouDt/e+LqobzOCStYL7aBkCStf9pf7pBWP wRukC415EorT5BhVfSvzK7tX2/0RTnwM0+axNLBZVAY//w1ewRp3A+hlC00YbaSg DtPsFEgyoB/ZJ+ndqMvPIMxXnn8fufpWzyDOv/JC8Y6bJxZxtbvQp7RM0S1PQOfH chutqFwZfRgrdvFmgah2oaCByoVKh2wiiLDYrzuElo7g47FBsLK6hb+QEuGvPzsB 4i2B5PKn1tQnshqtgrPS =eiLk -----END PGP SIGNATURE----- --=-Tar+kO1GraXSYPlLpSIw--