Return-path: Received: from mail-ew0-f176.google.com ([209.85.219.176]:36219 "EHLO mail-ew0-f176.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753735AbZEURSi (ORCPT ); Thu, 21 May 2009 13:18:38 -0400 Date: Thu, 21 May 2009 19:18:17 +0200 From: Alejandro Riveira =?UTF-8?B?RmVybsOhbmRleg==?= To: Johannes Berg Cc: linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org Subject: Re: [mac80211 ] Wifi Network slownes bisected Message-ID: <20090521191817.4456c440@varda> In-Reply-To: <1242922091.4212.14.camel@johannes.local> References: <20090521173839.1f20b95d@varda> <1242922091.4212.14.camel@johannes.local> Mime-Version: 1.0 Content-Type: multipart/signed; boundary="Sig_/=apcF/qvPA086CoCYbbG=0I"; protocol="application/pgp-signature"; micalg=PGP-SHA256 Sender: linux-wireless-owner@vger.kernel.org List-ID: --Sig_/=apcF/qvPA086CoCYbbG=0I Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable El Thu, 21 May 2009 18:08:11 +0200 Johannes Berg escribi=C3=B3: > On Thu, 2009-05-21 at 17:38 +0200, Alejandro Riveira Fern=C3=A1ndez wrote: >=20 > > I noticed that my wifi connection has slowed when stitching > > from 2.6.29.1 to 2.6.29.4 (it is also slow on 30-rc6) > > Also 2.6.27 (ubuntu) does not suffer it. >=20 > > $ git bisect good > > 64e1b00c974ddeae6a60ebb02e1c487371905cea is first bad commit > > commit 64e1b00c974ddeae6a60ebb02e1c487371905cea > > Author: Johannes Berg > > Date: Fri Apr 24 16:05:16 2009 +0000 > >=20 > > mac80211: fix basic rate bitmap calculation >=20 > Well ... How much did your connection slow down?=20 Enough to notice it when connecting through a 3MBit Adsl connection i.e. with the patch i get 30 40 60 ... 80 kiB maximum without it full 310 KiB so it is an issue for me (i have inet <-> modem-router <-> myPC only so i can not test with another pc) =20 > It is clear that this > commit might possibly slow down your connection, but not by a lot. Well it does by a lot avg of 60 KiB vs 300 KiB is lot for me And that's only because before we were sending with a higher rate than the > AP allowed us to... If you need the higher speed then set your AP to > G-only to make it include more rates in the basic rate set, that'll > speed up your connection properly. My Ap is set to "mixed" but i connect at G speeds ie iwconfig show 54M or = 48M or 36M but the connection is slow nonetheless=20 Do you think that would make such a difference (the ap mode)? Also with the patch i notice weird bumps on connection rates and without it the connection "feels" more stable =20 >=20 > That's all discounting driver bugs which may exist, of course. well i bisected and the problem is with this commit. Could be that rt2x00 is doing something wrong with that "rate bitmap" ?? I'm not programmer so i can not check myself >=20 > johannes Alejandro Thanks for the response... --Sig_/=apcF/qvPA086CoCYbbG=0I Content-Type: application/pgp-signature; name=signature.asc Content-Disposition: attachment; filename=signature.asc -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) iQIcBAEBCAAGBQJKFYzZAAoJEDO4iEReSTB2lZUP/1Nne0QRIeY2QZhhtveHyl4n WfJl9TVOH1YBdXsntk52GlF9BfA8SaqH2/MIzXVewEMl3FlXKFgQIXcg6BlgWYio ytSgTalFTZpUI19FzpsvMy+F9vK0Ejw9X3/vyGdi1RsU364qbr1nWjuMWAz8j3O7 WE16PCIjgO17uHSS+A2Xl1KT0+SrzoSzUN65XzhkBJw/sof4mCmzPM8aAL2oUvDG W2Ud5IENOBqWUQUP7XlOR51alN3mZZZppsKomRx2Hy9BpDXbQJiuP2i492zZmWFe KLr5sbQYWj+1H7oTyEJZ2dOBG2LS09wqOCgaB5VoBchhk1VT7YtJ76DNkZATc8fv CiE4ypS9TJHP4cvTmn48D2Ou8pvTOXPUXCRVRJE49sZBaOcAXVhz8o/m80ldO+pI Et4l2QQz2wYvDw8gaGEJcTarbtncDtEf6z0gNgUPMYY7S9lDeM2jPQh5G05hk5H8 M2U/4Oi9pu63CU9/GoP71gOHLYu28X/wz6iNMJSdVWTWkt3UGVXCnMAomRjI0ZMa h/uqhHrG8/pYuXFhDe82myW5+NOcXt8dRL5mHIFPbBIBgnedFg6eWtCtQvkj23LI ISuq3QAvQ+/efkD9Nnrq/r7yGnx7phBZp+fZb7iGMVROdvJ0uGTjrPiMfrD+3vxn M/sm3EWtCqEP9eTj6KnY =PkqG -----END PGP SIGNATURE----- --Sig_/=apcF/qvPA086CoCYbbG=0I--