Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932480AbZACBJT (ORCPT ); Fri, 2 Jan 2009 20:09:19 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1758428AbZACBJD (ORCPT ); Fri, 2 Jan 2009 20:09:03 -0500 Received: from bombadil.infradead.org ([18.85.46.34]:50597 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758334AbZACBJB (ORCPT ); Fri, 2 Jan 2009 20:09:01 -0500 Date: Fri, 2 Jan 2009 20:08:58 -0500 From: Kyle McMartin To: Justin Piszcz Cc: Arjan van de Ven , linux-kernel@vger.kernel.org, Kyle McMartin Subject: Re: 2.6.27/2.6.28: irqbalance dies shortly after starting the daemon on x86 but not x86_64, why? Message-ID: <20090103010858.GD5181@bombadil.infradead.org> References: <495E93D4.3060401@linux.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.18 (2008-05-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 967 Lines: 22 On Fri, Jan 02, 2009 at 07:32:21PM -0500, Justin Piszcz wrote: > The CPU = E6700 so yep, so if there is one physical socket with 4 cores it > keeps? For it to keep and not oneshot you need > 2 cores? > It depends... if your 4-core is laid out with four cores sharing one external cache, then it will terminate, if, say you had 4 cores with each pair sharing a cache (so two external caches) then it would continue as a daemon. (If you had 2 sockets with a processor in each one, it would continue running as well no matter how many cores on each.) If you run irqbalance --debug, it will show you the topology it detects. If you have multiple cache domains, and it is still exiting, then we have a bug. :) cheers, Kyle -- 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/