From owner-freebsd-stable@FreeBSD.ORG Tue Mar 20 12:40:12 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 8DA111065676; Tue, 20 Mar 2012 12:40:12 +0000 (UTC) (envelope-from matt.thyer@gmail.com) Received: from mail-wi0-f172.google.com (mail-wi0-f172.google.com [209.85.212.172]) by mx1.freebsd.org (Postfix) with ESMTP id EA21C8FC14; Tue, 20 Mar 2012 12:40:11 +0000 (UTC) Received: by wibhj6 with SMTP id hj6so4039217wib.13 for ; Tue, 20 Mar 2012 05:40:11 -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=/iOAy8RETBmW/dbEMHyBWoat4djhJodnakcW/vESRdQ=; b=nfYEry7lOijvwHP1alZSO1yMs2PvEL/EEeUfBEsR+glWP1VMYkldvv1Kamhvp3CUFO bvog0QhrDOqsi3PMuKn4ZBO6G+kS36w9ZAuDwDI3Uwn7YTdCdBY0xOVc+cCq9j2htWh5 1j5V60ULJyPV3gE7OtXr9jT4sp7lXxZJXMZLf6xdtLDyDDRMkm4tjr9SwDPkSgPbZ5tN 0xT+mqZZKA634jof+CP3v5aCatBz6bkXpUpoce6N7HeG6zkT7cnwPpsL2x3jDFRsBDci 2jLdr8/DX60L6Dcd/D8jT20dU42SjwZ/h/yg2cp80t96KWleGGkQco6x1Tt8uUZ9EDBw K/KA== MIME-Version: 1.0 Received: by 10.180.83.198 with SMTP id s6mr28414165wiy.8.1332247211069; Tue, 20 Mar 2012 05:40:11 -0700 (PDT) Received: by 10.216.229.10 with HTTP; Tue, 20 Mar 2012 05:40:10 -0700 (PDT) In-Reply-To: References: Date: Tue, 20 Mar 2012 23:10:10 +1030 Message-ID: From: Matt Thyer To: Ivan Voras 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: Tue, 20 Mar 2012 12:40:12 -0000 On 20 March 2012 22:24, Ivan Voras wrote: > On 20 March 2012 12:52, Matt Thyer wrote: > > On 20 March 2012 21:12, Ivan Voras wrote: > >> > >> On 20/03/2012 06:26, 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. > >> > > >> > >> Ok, but *which* interrupt is getting triggered? Please send the output > >> of "vmstat -i". > >> > >> > > interrupt total rate > > irq16: uhci0+ 3392184862 126692 > > Ok, something's probably wrong with USB. Can you disable it in BIOS? > > > > cpu0: timer 53549677 1999 > > irq256: mps0 2643187 98 > > irq257: re0 5508108 205 > > irq258: ahci0 160717 6 > > cpu1: timer 53525300 1999 > > cpu2: timer 53525300 1999 > > cpu3: timer 53525296 1999 > > Total 3614622447 134999 > > > I did just update the BIOS at about the same time so the difference may be due to that change. I'll try a few things such as: - Unplugging any USB things (I've only got a keyboard plugged in). - Downgrade BIOS. I'll get back to you all soon.