From owner-freebsd-stable@FreeBSD.ORG Thu Mar 22 14:33:49 2012 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 2D52E1065675 for ; Thu, 22 Mar 2012 14:33:49 +0000 (UTC) (envelope-from matt.thyer@gmail.com) Received: from mail-we0-f182.google.com (mail-we0-f182.google.com [74.125.82.182]) by mx1.freebsd.org (Postfix) with ESMTP id B09878FC14 for ; Thu, 22 Mar 2012 14:33:48 +0000 (UTC) Received: by wern13 with SMTP id n13so2502784wer.13 for ; Thu, 22 Mar 2012 07:33:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=mWBBbsWAa7ipIcsQw6Q5Dm9WQ+WrrCRuf+Pr5Eh8zxc=; b=MC9ZlYh+4vjeTZaLsAR8sbgOaiDLZRfAJGZ7qbul7hBFZ5OYR9XYzDmFgIOqEwXrGz P+k8it24OhkrEm1ggjGOF9x+tu0vlLFy85mT3iWSp3W/EXOq2EOfSpK2JiO+k3fgB6FD ZYFiJeoMdXFknInfDOOuEAJdouFYE5ZZszVFEiFY4h8vha4xTod/jYF/vRKxcGmIggbg SUXc62353Zo6/r150Mc0ceAopg6KqFBDTRjXhv9y8sLbRCNDLObmy3lkVmC0d69pjnc4 +5yjY97H/0Tcn2+/V4iatgjvaaqkkxDomVmyEu41OOwki/vbW3pqcWV0Va3lEL6ztvbY xv5w== MIME-Version: 1.0 Received: by 10.180.107.162 with SMTP id hd2mr5623529wib.8.1332426827582; Thu, 22 Mar 2012 07:33:47 -0700 (PDT) Received: by 10.216.229.10 with HTTP; Thu, 22 Mar 2012 07:33:47 -0700 (PDT) Received: by 10.216.229.10 with HTTP; Thu, 22 Mar 2012 07:33:47 -0700 (PDT) In-Reply-To: <4F6A67C0.7000909@sentex.net> References: <4F6A67C0.7000909@sentex.net> Date: Fri, 23 Mar 2012 01:03:47 +1030 Message-ID: From: Matt Thyer To: Mike Tancsa Content-Type: text/plain; charset=ISO-8859-1 X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Cc: freebsd-stable@freebsd.org Subject: Re: 157k interrupts per second causing 60% CPU load on idle system 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: Thu, 22 Mar 2012 14:33:49 -0000 On Mar 22, 2012 10:14 AM, "Mike Tancsa" wrote: > > On 3/20/2012 1:26 AM, Matt Thyer wrote: > > I've upgraded my FreeBSD-STABLE NAS from r225723 (22nd Sept 2011) to > > r232477 (4th Mar 2012) and am finding that a system process called "intr" > > is now constantly using about 60% of 1 CPU starting a short time after > > reboot (possibly triggered by use of the samba server). > > > > When this starts, systat -vm 1 says that the system is 85% idle and 14% > > interrupt handling. > > It says that there's around 157k interrupts per second. > > > > Any idea what could be the cause ? > > This sounds like the problem I had with my intel board. BIOS update > fixed it. What chipset and MB vendor do you have ? The original post tells you this. I've already updated to the latest BIOS and this could have caused the problem. I think I should try updating the firmware of the SAS/SATA HBA but not until I've confirmed if a BIOS downgrade works. Unfortunately it's very hard to get downtime on this system so it may be some time before I can report any news.