From owner-freebsd-current@FreeBSD.ORG Tue Jul 28 14:22:56 2009 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id DD0C6106566C for ; Tue, 28 Jul 2009 14:22:56 +0000 (UTC) (envelope-from ohartman@zedat.fu-berlin.de) Received: from outpost1.zedat.fu-berlin.de (outpost1.zedat.fu-berlin.de [130.133.4.66]) by mx1.freebsd.org (Postfix) with ESMTP id 680F28FC1E for ; Tue, 28 Jul 2009 14:22:56 +0000 (UTC) (envelope-from ohartman@zedat.fu-berlin.de) Received: from inpost2.zedat.fu-berlin.de ([130.133.4.69]) by outpost1.zedat.fu-berlin.de (Exim 4.69) with esmtp (envelope-from ) id <1MVnZv-0000iB-82>; Tue, 28 Jul 2009 16:22:55 +0200 Received: from telesto.geoinf.fu-berlin.de ([130.133.86.198]) by inpost2.zedat.fu-berlin.de (Exim 4.69) with esmtpsa (envelope-from ) id <1MVnZv-0005q2-6X>; Tue, 28 Jul 2009 16:22:55 +0200 Message-ID: <4A6F09BA.2020703@zedat.fu-berlin.de> Date: Tue, 28 Jul 2009 14:22:50 +0000 From: "O. Hartmann" Organization: Freie =?ISO-8859-15?Q?Universit=E4t_Berlin?= User-Agent: Thunderbird 2.0.0.22 (X11/20090724) MIME-Version: 1.0 To: Anton Shterenlikht References: <4A6DB30B.20705@zedat.fu-berlin.de> <4A6DB9F1.7050404@haruhiism.net> <4A6E0620.6070200@mail.zedat.fu-berlin.de> <20090727210428.GA30253@mech-cluster241.men.bris.ac.uk> <20090728103545.GA22380@mech-cluster241.men.bris.ac.uk> In-Reply-To: <20090728103545.GA22380@mech-cluster241.men.bris.ac.uk> Content-Type: text/plain; charset=ISO-8859-15; format=flowed Content-Transfer-Encoding: 7bit X-Originating-IP: 130.133.86.198 Cc: "O. Hartmann" , freebsd-current@freebsd.org, freebsd-ia64@freebsd.org Subject: Re: FreeBSD 8.0-BETA2/amd64 crashes on SMP under load X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 28 Jul 2009 14:22:57 -0000 Anton Shterenlikht wrote: > On Mon, Jul 27, 2009 at 10:04:28PM +0100, Anton Shterenlikht wrote: >> On Mon, Jul 27, 2009 at 09:55:12PM +0200, O. Hartmann wrote: >>> Kamigishi Rei wrote: >>>> O. Hartmann wrote: >>>>> I have the problem of crashing FreeBSD 8.0-BETA2/amd64 under load on >>>>> all of our SMP boxes. Is there an issue known at the moment? If not, I >>>>> will prepare the kernel for whitnessing and provide more informations, >>>>> if you wish. >>>> A quick question: what is in the crash message, i.e. the backtrace? >>>> And what kind of crash is it - a panic() or a fatal trap? >>> On the 8-core server box, I sometimes see : >>> >>> Fatal trap 12: page fault while in kernel mode >>> fault code = supervisor read, page not present >> Not sure if it's related, but on ia64 SMP (2 cpus) with 8.0-current and >> later with 8.0-beta1 (I havent' built beta2 yet) I'm getting crashes >> under load every so often. E.g buildworld -j8 is likely to crash the >> box. No messages, just a sudden freeze, no backtrace or panic, and then reboot. >> >> If load is less heavy, e.g. fewer processes and some idle time, the >> problem doesn't seem to appear. >> >> I'm happy to do any further testing, if suggested. > > my ia64 8.0-beta1 SMP box died again on > make -j8 buildworld > with no panic or log entries. > > Is it possible that some kernel variable needs to > be increased? E.g. kern.maxproc, kern.maxfiles, etc. > Or perhaps I'm talking complete rubbish.. > > I suggest you try again with a UP kernel - a suggestion from a kernel-nnob, sorry. My SMP boxes work now with UP-kernel, but they are really slowish although they have modern Intel C2D/Penryn cores. Regards, Oliver