From owner-freebsd-ia64@FreeBSD.ORG Tue Jul 28 15:35:23 2009 Return-Path: Delivered-To: freebsd-ia64@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 66A43106568D; Tue, 28 Jul 2009 15:35:23 +0000 (UTC) (envelope-from xcllnt@mac.com) Received: from asmtpout028.mac.com (asmtpout028.mac.com [17.148.16.103]) by mx1.freebsd.org (Postfix) with ESMTP id 4C2628FC24; Tue, 28 Jul 2009 15:35:23 +0000 (UTC) (envelope-from xcllnt@mac.com) MIME-version: 1.0 Content-transfer-encoding: 7BIT Content-type: text/plain; charset=us-ascii; format=flowed; delsp=yes Received: from [172.24.241.141] (natint3.juniper.net [66.129.224.36]) by asmtp028.mac.com (Sun Java(tm) System Messaging Server 6.3-8.01 (built Dec 16 2008; 32bit)) with ESMTPSA id <0KNI008AW0M4FT40@asmtp028.mac.com>; Tue, 28 Jul 2009 08:35:04 -0700 (PDT) From: Marcel Moolenaar In-reply-to: <20090728144555.GD75439@mech-cluster241.men.bris.ac.uk> Date: Tue, 28 Jul 2009 08:34:52 -0700 Message-id: 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> <4A6F09BA.2020703@zedat.fu-berlin.de> <20090728144555.GD75439@mech-cluster241.men.bris.ac.uk> To: Anton Shterenlikht X-Mailer: Apple Mail (2.1074) Cc: "O. Hartmann" , freebsd-current@freebsd.org, "O. Hartmann" , freebsd-ia64@freebsd.org Subject: Re: FreeBSD 8.0-BETA2/amd64 crashes on SMP under load X-BeenThere: freebsd-ia64@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Porting FreeBSD to the IA-64 List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 28 Jul 2009 15:35:24 -0000 On Jul 28, 2009, at 7:45 AM, Anton Shterenlikht wrote: > On Tue, Jul 28, 2009 at 02:22:50PM +0000, O. Hartmann wrote: >> 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. > > I need SMP for OpenMP codes. It's a shame if SMP is buggy, but > I guess all is down to small user base.. I have no problems with SMP. If you don't have a panic, then you may have a hardware problem. Check for MCA records. -- Marcel Moolenaar xcllnt@mac.com