Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1161042AbVLOEfy (ORCPT ); Wed, 14 Dec 2005 23:35:54 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1161046AbVLOEfy (ORCPT ); Wed, 14 Dec 2005 23:35:54 -0500 Received: from mini.brewt.org ([216.18.5.212]:4363 "HELO mini.brewt.org") by vger.kernel.org with SMTP id S1161042AbVLOEfx convert rfc822-to-8bit (ORCPT ); Wed, 14 Dec 2005 23:35:53 -0500 Date: Wed, 14 Dec 2005 20:35:52 -0800 From: "Adrian Yee" Subject: Re: tsc clock issues with dual core and question about irq balancing To: Jeff Carr Cc: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 8BIT Message-Id: In-Reply-To: <43A0AF15.7020705@linuxmachines.com> Mime-Version: 1.0 References: <43A0AF15.7020705@linuxmachines.com> X-Gmail-Account: brewt@brewt.org Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1759 Lines: 43 Hi Jeff, >> My other question is about irq balancing - I turned it on, but it >> doesn't seem to be working properly: >> >> CPU0 CPU1 >> 0: 109208 975 IO-APIC-edge timer >> 1: 1226 10 IO-APIC-edge i8042 >> 8: 275272 1 IO-APIC-edge rtc >> 9: 0 0 IO-APIC-level acpi >> 12: 4133 4 IO-APIC-edge i8042 >> 14: 5135 8 IO-APIC-edge ide0 >> 15: 17 8 IO-APIC-edge ide1 >> 16: 25084 1 IO-APIC-level eth0 >> 17: 43597 1 IO-APIC-level eth1 >> 18: 185 5 IO-APIC-level libata >> 19: 0 0 IO-APIC-level libata >> 20: 11525 1 IO-APIC-level EMU10K1 >> 21: 24870 1 IO-APIC-level nvidia >> NMI: 0 0 >> LOC: 110119 110118 >> ERR: 0 >> MIS: 0 > > I think there is an irqbalance userspace daemon. According to debian's package description for the irq balance package: "Daemon to balance irq's across multiple CPUs on systems with the 2.4 or 2.6 kernel. This can lead to better performance and IO balance on SMP systems. Useful mostly just for 2.4 kernels, or 2.6 kernels with CONFIG_IRQBALANCE turned off." I have the CONFIG_IRQBALANCE option turned on, so it should be balancing the irq's itself; is it not? Would there even be any benefit from balancing the irq's with a single dual core processor? Thanks. Adrian - 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/