From owner-freebsd-hackers@FreeBSD.ORG Mon Jul 17 14:22:28 2006 Return-Path: X-Original-To: freebsd-hackers@freebsd.org Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 4E47616A4DF for ; Mon, 17 Jul 2006 14:22:28 +0000 (UTC) (envelope-from xfb52@dial.pipex.com) Received: from smtp-out4.blueyonder.co.uk (smtp-out4.blueyonder.co.uk [195.188.213.7]) by mx1.FreeBSD.org (Postfix) with ESMTP id B528143D46 for ; Mon, 17 Jul 2006 14:22:27 +0000 (GMT) (envelope-from xfb52@dial.pipex.com) Received: from [172.23.170.139] (helo=anti-virus01-10) by smtp-out4.blueyonder.co.uk with smtp (Exim 4.52) id 1G2TzO-0006wk-IP; Mon, 17 Jul 2006 15:22:26 +0100 Received: from [82.41.34.175] (helo=[192.168.0.2]) by asmtp-out3.blueyonder.co.uk with esmtp (Exim 4.52) id 1G2TzN-0004wo-WC; Mon, 17 Jul 2006 15:22:26 +0100 Message-ID: <44BB9D21.3010400@dial.pipex.com> Date: Mon, 17 Jul 2006 15:22:25 +0100 From: Alex Zbyslaw User-Agent: Mozilla/5.0 (X11; U; FreeBSD i386; en-GB; rv:1.7.13) Gecko/20060515 X-Accept-Language: en MIME-Version: 1.0 To: freebsd-hackers@freebsd.org Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Subject: [Fwd: Interrupts question] X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 17 Jul 2006 14:22:28 -0000 No responses from questions@. Anyone here understand what's going on? Thanks]. __ I was monitoring a machine with "systat -vmstat" and noticed something about the interrupts and I don't know if it's a problem or not. If it is a problem, is there anything I can do about it? The interrupts for the network interface (em0) on irq 64 exactly match those for a uhc device on irq 16. And the interrupts for the hardware raid (amr) on irq 46 exactly match those for a uhc device on irq 18. The machine is a Dell 2850 running 5.4. Relevant bits from the dmesg are: ioapic0: Changing APIC ID to 2 ioapic1: Changing APIC ID to 3 ioapic1: WARNING: intbase 32 != expected base 24 ioapic2: Changing APIC ID to 4 ioapic2: WARNING: intbase 64 != expected base 56 ioapic3: Changing APIC ID to 5 ioapic3: WARNING: intbase 96 != expected base 88 ioapic0 irqs 0-23 on motherboard ioapic1 irqs 32-55 on motherboard ioapic2 irqs 64-87 on motherboard ioapic3 irqs 96-119 on motherboard [...] amr0: mem 0xdfdc0000-0xdfdfffff,0xd80f0000-0xd80fffff irq 46 at device 14.0 on pci2 [...] em0: port 0xecc0-0xecff mem 0xdfae0000-0xdfafffff irq 64 at device 7.0 on pci6 [...] uhci0: port 0xace0-0xacff irq 16 at device 29.0 on pci0 [...] uhci2: port 0xaca0-0xacbf irq 18 at device 29.2 on pci0 [...] Turning off USB isn't an option as it's required for the pseudo-keyboard/mouse used by the DRAC. Here a sample of the interrupt section. The number of interrupts for em0@64/uhc@16 can easily be in the thousands rather than hundreds. Interrupts 1950 total 6: fdc0 128 8: rtc 13: npx 14: ata 450 16: uhc 409 18: uhc 19: uhc 23: ata 409 46: amr 450 64: em0 4 65: em1 106: ah 107: ah Any insight appreciated, --Alex