Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755890Ab3CYHCi (ORCPT ); Mon, 25 Mar 2013 03:02:38 -0400 Received: from cn.fujitsu.com ([222.73.24.84]:64520 "EHLO song.cn.fujitsu.com" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1752573Ab3CYHCh (ORCPT ); Mon, 25 Mar 2013 03:02:37 -0400 X-IronPort-AV: E=Sophos;i="4.87,343,1363104000"; d="scan'208";a="6938322" Message-ID: <514FF70A.6080402@cn.fujitsu.com> Date: Mon, 25 Mar 2013 15:04:42 +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> <514FDE5F.5020500@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 15:01:48, Serialize by Router on mailserver/fnst(Release 8.5.3|September 15, 2011) at 2013/03/25 15:01:49, Serialize complete at 2013/03/25 15:01:49 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: 1171 Lines: 37 On 03/25/2013 02:46 PM, Lenky Gao wrote: >> Do you mean on your old machine the irq will be distributed automatically >> among the cpus set by smp_affinity? >> > > Yes. My another machine's interrupts are as follows: And without irqbalance service? It sounds weird to me.. thanks, linfeng > > [root@localhost ~]# cat /proc/cpuinfo > processor : 0 > vendor_id : GenuineIntel > cpu family : 6 > model : 23 > model name : Pentium(R) Dual-Core CPU E6700 @ 3.20GHz > ... > [root@localhost ~]# echo 3 > /proc/irq/18/smp_affinity > [root@localhost ~]# cat /proc/irq/18/smp_affinity > 3 > [root@localhost ~]# cat /proc/interrupts | grep eth2 > 18: 455 458 IO-APIC-fasteoi eth2 > [root@localhost ~]# cat /proc/interrupts | grep eth2 > 18: 463 467 IO-APIC-fasteoi eth2 > [root@localhost ~]# cat /proc/interrupts | grep eth2 > 18: 471 476 IO-APIC-fasteoi eth2 > > -- 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/