Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757367Ab3CYFRX (ORCPT ); Mon, 25 Mar 2013 01:17:23 -0400 Received: from cn.fujitsu.com ([222.73.24.84]:64253 "EHLO song.cn.fujitsu.com" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1757296Ab3CYFRW (ORCPT ); Mon, 25 Mar 2013 01:17:22 -0400 X-IronPort-AV: E=Sophos;i="4.87,343,1363104000"; d="scan'208";a="6936778" Message-ID: <514FDE5F.5020500@cn.fujitsu.com> Date: Mon, 25 Mar 2013 13:19:27 +0800 From: Lin Feng User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/17.0 Thunderbird/17.0 MIME-Version: 1.0 To: Lenky Gao CC: linux-kernel@vger.kernel.org, yinghai@kernel.org, mingo@elte.hu, gorcunov@gmail.com, rusty@rustcorp.com.au, sivanich@sgi.com, agordeev@redhat.com Subject: Re: Question: How to distribute the interrupts over multiple cores? References: <514FBD6E.2030706@cn.fujitsu.com> <514FC385.4030008@cn.fujitsu.com> In-Reply-To: X-MIMETrack: Itemize by SMTP Server on mailserver/fnst(Release 8.5.3|September 15, 2011) at 2013/03/25 13:16:33, Serialize by Router on mailserver/fnst(Release 8.5.3|September 15, 2011) at 2013/03/25 13:16:36, Serialize complete at 2013/03/25 13:16:36 Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1231 Lines: 31 Hi, On 03/25/2013 11:44 AM, Lenky Gao wrote: >> On 03/25/2013 11:18 AM, Lenky Gao wrote: >>> The irqbalance service has been stopped. >> So try start irqbalance to see what happen? >> It should help to give what you want ;-) > > Using the irqbalance service to dynamically change the IRQ-bound? It's > seems a software solution. In my old machine, there is no this > problem. I need some information to explain why. Maybe is the Do you mean on your old machine the irq will be distributed automatically among the cpus set by smp_affinity? Sorry, I forgot one thing that the irqbalance service will break the mask set by smp_affinity. So I don't know if now we support the feature that balance among the cpus set by smp_affinity. In my old conception when we set smp_affinity the irqbalance service should be stopped, so you are right before, and the kernel will choose one cpu in your mask for the IRQ and bounded from now on if there is no irqbalance service. thanks, linfeng -- 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/