From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932619AbXBWTBd (ORCPT ); Fri, 23 Feb 2007 14:01:33 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S933176AbXBWTBd (ORCPT ); Fri, 23 Feb 2007 14:01:33 -0500 Received: from pentafluge.infradead.org ([213.146.154.40]:44007 "EHLO pentafluge.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932619AbXBWTBc (ORCPT ); Fri, 23 Feb 2007 14:01:32 -0500 Subject: Re: irq balancing question From: Arjan van de Ven To: Gergely Imre Cc: linux-kernel@vger.kernel.org, hancockr@shaw.ca In-Reply-To: <45DF3795.3040005@astral.ro> References: <45DED0D6.1040700@astral.ro> <1172241917.3241.4.camel@laptopd505.fenrus.org> <45DF012D.3080802@astral.ro> <1172246085.3241.24.camel@laptopd505.fenrus.org> <45DF3795.3040005@astral.ro> Content-Type: text/plain Organization: Intel International BV Date: Fri, 23 Feb 2007 20:01:29 +0100 Message-Id: <1172257289.3241.48.camel@laptopd505.fenrus.org> Mime-Version: 1.0 X-Mailer: Evolution 2.8.3 (2.8.3-1.fc6) Content-Transfer-Encoding: 7bit X-SRS-Rewrite: SMTP reverse-path rewritten from by pentafluge.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org > > and i guess it doesn't matter if the distribution is being done by the > hardware, from the point of view of the kernel, i would still get the > performance penalty. for the cache bouncing you save assuming you have an Intel cpu (eg one where the cache is shared). You don't save on the cross-cpu reassembly, that is an entire different algorithm path you hit there.. > i'm just trying to figure it out, i have no real knowledge of the inner > kernel workings, so i dont know. but i really would like to use all 4 cores. > just how expensive is that reassembly path ? depends on your traffic to be honest, probably a question more suited for net-dev list. -- if you want to mail me at work (you don't), use arjan (at) linux.intel.com Test the interaction between Linux and your BIOS via http://www.linuxfirmwarekit.org