Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750848AbWAJLOn (ORCPT ); Tue, 10 Jan 2006 06:14:43 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750829AbWAJLOn (ORCPT ); Tue, 10 Jan 2006 06:14:43 -0500 Received: from wproxy.gmail.com ([64.233.184.202]:47762 "EHLO wproxy.gmail.com") by vger.kernel.org with ESMTP id S1751051AbWAJLOn convert rfc822-to-8bit (ORCPT ); Tue, 10 Jan 2006 06:14:43 -0500 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:to:subject:mime-version:content-type:content-transfer-encoding:content-disposition; b=Ohl98cVyBo/4javppctV3clU6DYtQbqVRZN5dbK1rfEHq7R8BYuE9MFZqgzQqOnV/CNo4Cx/wHxETIe4Ys23N9fMeRqoQ1VrsGi0sgubhBRWVTOU1ce1M6zOZmCItB72tThkXPuGp7gEfPzWkfMDKSmA5xAdDRFb2Y8u7mevvFQ= Message-ID: <9a8748490601100314u26d4a566uc41a1912e410ea46@mail.gmail.com> Date: Tue, 10 Jan 2006 12:14:42 +0100 From: Jesper Juhl To: Linux Kernel Mailing List Subject: Although CONFIG_IRQBALANCE is enabled IRQ's don't seem to be balanced very well MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2085 Lines: 50 I enabled CONFIG_IRQBALANCE with 2.6.15 and 2.6.15-mm2 (which the numbers below are from), and had expected that to evenly (or at least close to evenly) balance IRQ's across the two CPU cores of my Athlon X2 4400+. But as you can see below, CPU0 seems to be heavily favoured - what's the reason for that and is it something I can improve upon? Is it due to this being a Dual Core CPU and not two physically sepperate CPU's? Do I need any userspace tools in addition to CONFIG_IRQBALANCE? juhl@dragon:~$ date && cat /proc/interrupts Tue Jan 10 11:20:33 CET 2006 CPU0 CPU1 0: 3818901 18920 IO-APIC-edge timer 1: 8398 7 IO-APIC-edge i8042 8: 0 1 IO-APIC-edge rtc 9: 0 0 IO-APIC-level acpi 12: 210259 11 IO-APIC-edge i8042 18: 12883 1 IO-APIC-level eth0 19: 15906 291 IO-APIC-level aic7xxx 20: 1284 1 IO-APIC-level EMU10K1 NMI: 0 0 LOC: 3838143 3837641 ERR: 0 MIS: 0 juhl@dragon:~$ date && cat /proc/interrupts Tue Jan 10 12:12:38 CET 2006 CPU0 CPU1 0: 6944246 18920 IO-APIC-edge timer 1: 11291 7 IO-APIC-edge i8042 8: 0 1 IO-APIC-edge rtc 9: 0 0 IO-APIC-level acpi 12: 393217 11 IO-APIC-edge i8042 18: 38690 1 IO-APIC-level eth0 19: 204122 291 IO-APIC-level aic7xxx 20: 10877 1 IO-APIC-level EMU10K1 NMI: 0 0 LOC: 6963608 6963106 ERR: 0 MIS: 0 -- Jesper Juhl Don't top-post http://www.catb.org/~esr/jargon/html/T/top-post.html Plain text mails only, please http://www.expita.com/nomime.html - 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/