From mboxrd@z Thu Jan 1 00:00:00 1970 From: Rick Jones Subject: Re: [RFC] export irq_set/get_affinity() for multiqueue network drivers Date: Fri, 29 Aug 2008 10:14:22 -0700 Message-ID: <48B82E6E.2090603@hp.com> References: <48B708E1.4070001@inria.fr> <20080829055023.07966b4a@infradead.org> <8763pjpy2b.fsf@basil.nowhere.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Cc: Arjan van de Ven , Brice Goglin , LKML , netdev@vger.kernel.org To: Andi Kleen Return-path: Received: from g5t0009.atlanta.hp.com ([15.192.0.46]:23878 "EHLO g5t0009.atlanta.hp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754406AbYH2RO1 (ORCPT ); Fri, 29 Aug 2008 13:14:27 -0400 In-Reply-To: <8763pjpy2b.fsf@basil.nowhere.org> Sender: netdev-owner@vger.kernel.org List-ID: > Also I suspect handling SMT explicitely is a good idea. e.g. I would > always set the affinity to all thread siblings in a core, not > just a single one, because context switch is very cheap between them. That is true, but don't they also "compete" for pipeline resources? rick jones