From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Tvrtko A. Ursulin" Subject: skge performance sensitivity (WAS: Bonding gigabit and fast?) Date: Wed, 17 Dec 2008 20:18:55 +0000 Message-ID: <200812172018.56230.tvrtko@ursulin.net> References: <200812161939.30033.tvrtko@ursulin.net> <200812162012.29811.tvrtko@ursulin.net> <4948119B.5050000@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Cc: netdev@vger.kernel.org To: Chris Snook Return-path: Received: from mk-outboundfilter-5-a-2.mail.uk.tiscali.com ([212.74.114.4]:10856 "EHLO mk-outboundfilter-5-a-2.mail.uk.tiscali.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751700AbYLQUTB (ORCPT ); Wed, 17 Dec 2008 15:19:01 -0500 In-Reply-To: <4948119B.5050000@redhat.com> Content-Disposition: inline Sender: netdev-owner@vger.kernel.org List-ID: On Tuesday 16 December 2008 20:37:47 Chris Snook wrote: [snip] > The real problem is that you get such lousy performance in unbonded gigabit > mode. Try oprofiling it to see where it's spending all that time. Ha! Since I have put vanilla 2.6.27.9 on the server yesterday, but compiled it with distro configuration, I decided to try a minimal "optimised" config for this machine today. With a reconfigured and recompiled kernel skge outbound performance went from 13 Mb/s to 17 Mb/s so it seems there was something in there which was really hampering it. Kernel configs are radically different so I am not sure if there is any point in sending them here? And I am also not sure if I will be able to spend any more time trying to pinpoint which config option was to blame. But if I will I will of course report my findings. Tvrtko