From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S264934AbTLFCnC (ORCPT ); Fri, 5 Dec 2003 21:43:02 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S264938AbTLFCnC (ORCPT ); Fri, 5 Dec 2003 21:43:02 -0500 Received: from holomorphy.com ([199.26.172.102]:42197 "EHLO holomorphy") by vger.kernel.org with ESMTP id S264934AbTLFCnA (ORCPT ); Fri, 5 Dec 2003 21:43:00 -0500 Date: Fri, 5 Dec 2003 18:42:51 -0800 From: William Lee Irwin III To: Colin Coe Cc: linux-kernel@vger.kernel.org Subject: Re: SMP broken on Dell PowerEdge 4100/200 under 2.6.0-testxx? Message-ID: <20031206024251.GG8039@holomorphy.com> Mail-Followup-To: William Lee Irwin III , Colin Coe , linux-kernel@vger.kernel.org References: <3350.192.168.1.3.1070677965.squirrel@www.coesta.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <3350.192.168.1.3.1070677965.squirrel@www.coesta.com> Organization: The Domain of Holomorphy User-Agent: Mutt/1.5.4i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Sat, Dec 06, 2003 at 10:32:45AM +0800, Colin Coe wrote: > This indicates to me that the processing load is being evenly distributed > accross the two processes. Under v2.6.0-testxx however, 'cat > /proc/interrupts' shows this: > [root@host root]# cat /proc/interrupts > CPU0 CPU1 > 0: 633122 30 IO-APIC-edge timer > 1: 207 IO-APIC-edge i8042 > 2: XT-PIC cascade > 4: 48 1 IO-APIC-edge serial > 5: 449 1 IO-APIC-level eth1 > 10: 135 1 IO-APIC-level aic7xxx > 11: 1447 1 IO-APIC-level eth0 > 12: 61 IO-APIC-edge i8042 > 14: IO-APIC-level CS46XX > 15: 14982 1 IO-APIC-level megaraid 2.6 does balancing across packages, not logical cpus, so this will happen and it will be largely harmless, except for what appears to be some kind of bug where it's stealing the timer from logical cpu 1. -- wli