From owner-freebsd-stable@FreeBSD.ORG Fri Jul 14 12:07:43 2006 Return-Path: X-Original-To: freebsd-stable@freebsd.org Delivered-To: freebsd-stable@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 3CA3916A4DF; Fri, 14 Jul 2006 12:07:43 +0000 (UTC) (envelope-from GMcCaughan@synaptics-uk.com) Received: from mx2.synaptics-uk.com (mx2.synaptics-uk.com [194.203.111.209]) by mx1.FreeBSD.org (Postfix) with ESMTP id BBF4143D6A; Fri, 14 Jul 2006 12:07:36 +0000 (GMT) (envelope-from GMcCaughan@synaptics-uk.com) Received: from firewall.synaptics-uk.com ([194.203.111.212] helo=ukexchange2k.synaptics-inc.local) by mx2.synaptics-uk.com with esmtp (Exim 4.20) id 1G1MuQ-0007Id-2x; Fri, 14 Jul 2006 13:36:42 +0100 Received: from lists.synaptics-uk.com ([172.20.11.6]) by ukexchange2k.synaptics-inc.local with Microsoft SMTPSVC(5.0.2195.6713); Fri, 14 Jul 2006 13:06:59 +0100 Received: from [172.20.11.5] (unknown [172.20.11.5]) by lists.synaptics-uk.com (Postfix) with ESMTP id A88C317030; Fri, 14 Jul 2006 12:47:19 +0100 (BST) From: Gareth McCaughan To: freebsd-questions@freebsd.org Date: Fri, 14 Jul 2006 13:06:58 +0100 User-Agent: KMail/1.9.1 References: <200607132002.43637.gmccaughan@synaptics-uk.com> In-Reply-To: <200607132002.43637.gmccaughan@synaptics-uk.com> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200607141306.58682.gmccaughan@synaptics-uk.com> X-OriginalArrivalTime: 14 Jul 2006 12:06:59.0480 (UTC) FILETIME=[02493180:01C6A73E] Cc: freebsd-stable@freebsd.org Subject: Re: "swiN: clock sio" process taking 75% CPU X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 14 Jul 2006 12:07:43 -0000 I wrote, inter alia, > About 6 minutes after booting (on two occasions; I don't > guarantee that this doesn't vary), a process that appears > in the output of "ps" as "[swi4: clock sio]" begins to > use about 3/4 of the machine's CPU. I think it does so > more or less instantaneously. It continues to do so > indefinitely, so far as I can tell. David Wolfskill e-mailed me off-list to suggest looking at the output of "vmstat -i". Answer: the interrupt rates all appear to be normal, or at least similar to those he observes on his machines which don't exhibit my problem. More specifically ... ---------- excerpt from my reply to David begins ---------- I get this: | interrupt total rate | irq1: atkbd0 3 0 | irq6: fdc0 10 0 | irq14: ata0 2913 1 | irq15: ata1 47 0 | irq17: xl0 7342 4 | cpu0: timer 302649 199 | Total 312964 206 (so the rate of timer interrupts doesn't appear to be insane) and | 7:56PM up 26 mins, 1 user, load averages: 1.87, 1.45, 1.08 (so the cost in CPU cycles of servicing them -- if that's what the rogue process is doing, which seems somewhat plausible -- *does* appear to be insane). ---------- excerpt from my reply to David ends ---------- -- g