Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262644AbUKQVwD (ORCPT ); Wed, 17 Nov 2004 16:52:03 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262680AbUKQVtS (ORCPT ); Wed, 17 Nov 2004 16:49:18 -0500 Received: from null.rsn.bth.se ([194.47.142.3]:28378 "EHLO null.rsn.bth.se") by vger.kernel.org with ESMTP id S262657AbUKQVoK (ORCPT ); Wed, 17 Nov 2004 16:44:10 -0500 Subject: Re: Network slowdown from 2.6.7 to 2.6.9 From: Martin Josefsson To: Harry Edmon Cc: Con Kolivas , Stephen Hemminger , linux-kernel@vger.kernel.org In-Reply-To: <419BBF57.3040808@atmos.washington.edu> References: <419A9151.2000508@atmos.washington.edu> <20041116163257.0e63031d@zqx3.pdx.osdl.net> <419BA5C4.4020503@atmos.washington.edu> <1100722571.20185.9.camel@tux.rsn.bth.se> <419BBF57.3040808@atmos.washington.edu> Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="=-1LD/Z5b0DSX5MIzlv13T" Message-Id: <1100727847.20185.31.camel@tux.rsn.bth.se> Mime-Version: 1.0 X-Mailer: Ximian Evolution 1.4.6 Date: Wed, 17 Nov 2004 22:44:08 +0100 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1451 Lines: 55 --=-1LD/Z5b0DSX5MIzlv13T Content-Type: text/plain Content-Transfer-Encoding: quoted-printable On Wed, 2004-11-17 at 22:15, Harry Edmon wrote: > No, it is not loaded. Here is the list of loaded modules under 2.6.9: Ok, then it's something else, maybe the TSO changes... Here's some thigs to try: You can see the current settings, TSO etc, with 'ethtool -k eth0' and disable TSO with 'ethtool -K eth0 tso off' If that doesn't help there's more things to try. I don't know anything about the diffrent TCP congestion algorithms (Stephen does), but you could try disabling BIC. echo 0 > /proc/sys/net/ipv4/tcp_bic (continuing with things I hardly know anything about...) Or maybe the autotuning receive buffer, try disabling that with echo 0 > /proc/sys/net/ipv4/tcp_moderate_rcvbuf Stephen, any more things to try ? --=20 /Martin --=-1LD/Z5b0DSX5MIzlv13T Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.5 (GNU/Linux) iD8DBQBBm8YnWm2vlfa207ERAgyHAJ9GrOuJTC0Elj3ut4IJ2VXUBxS+4ACfeZs5 OSS/aW7xCYrIyu1sdh0aF18= =4tf/ -----END PGP SIGNATURE----- --=-1LD/Z5b0DSX5MIzlv13T-- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/