From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751215AbVKFH5Z (ORCPT ); Sun, 6 Nov 2005 02:57:25 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751225AbVKFH5Z (ORCPT ); Sun, 6 Nov 2005 02:57:25 -0500 Received: from pentafluge.infradead.org ([213.146.154.40]:30671 "EHLO pentafluge.infradead.org") by vger.kernel.org with ESMTP id S1751215AbVKFH5Z (ORCPT ); Sun, 6 Nov 2005 02:57:25 -0500 Subject: Re: SMP CPU affinity questions From: Arjan van de Ven To: "Jeffrey V. Merkey" Cc: listmonkey@neo.relay-host.net, linux-kernel@vger.kernel.org In-Reply-To: <4368EBBF.2000302@wolfmountaingroup.com> References: <20051102175022.13637.qmail@neo.relay-host.net> <4368EBBF.2000302@wolfmountaingroup.com> Content-Type: text/plain Date: Sun, 06 Nov 2005 08:56:43 +0100 Message-Id: <1131263804.2826.1.camel@laptopd505.fenrus.org> Mime-Version: 1.0 X-Mailer: Evolution 2.2.3 (2.2.3-2.fc4) Content-Transfer-Encoding: 7bit X-Spam-Score: 2.9 (++) X-Spam-Report: SpamAssassin version 3.0.4 on pentafluge.infradead.org summary: Content analysis details: (2.9 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- 0.1 RCVD_IN_SORBS_DUL RBL: SORBS: sent directly from dynamic IP address [80.57.133.107 listed in dnsbl.sorbs.net] 2.8 RCVD_IN_DSBL RBL: Received via a relay in list.dsbl.org [] 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 On Wed, 2005-11-02 at 09:39 -0700, Jeffrey V. Merkey wrote: > listmonkey@neo.relay-host.net wrote: > > >Hi- > > > >I am trying to use a quad Opteron motherboard with SMP Kernel 2.6.5 for a quasi-real-time task. > >I need to assign all processes to specific CPUs, including interrupt handlers. > >I have had success using sched_setaffinity() to set the CPU for processes I create, but I am unable, > >as root, to force system processes to move to another CPU. Any ideas? > > > >I can find no documentation about how to force an interrupt handler to a specific CPU - is this > >possible without modifying the kernel? > > > > > > > > > IOApic's support binding of interrupt delivery in intel based platforms, > but I am unaware of tools which force this > setting by default on Linux, but someone else may be able to point you > in that direction. http://people.redhat.com/arjanv/irqbalance