From owner-freebsd-questions@FreeBSD.ORG Sat Dec 27 15:49:11 2008 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 77A1D106564A for ; Sat, 27 Dec 2008 15:49:11 +0000 (UTC) (envelope-from freebsd-questions-local@be-well.ilk.org) Received: from mail6.sea5.speakeasy.net (mail6.sea5.speakeasy.net [69.17.117.8]) by mx1.freebsd.org (Postfix) with ESMTP id 4D8F28FC18 for ; Sat, 27 Dec 2008 15:49:11 +0000 (UTC) (envelope-from freebsd-questions-local@be-well.ilk.org) Received: (qmail 7076 invoked from network); 27 Dec 2008 15:49:10 -0000 Received: from dsl092-078-145.bos1.dsl.speakeasy.net (HELO be-well.ilk.org) ([66.92.78.145]) (envelope-sender ) by mail6.sea5.speakeasy.net (qmail-ldap-1.03) with SMTP for ; 27 Dec 2008 15:49:10 -0000 Received: from lowell-desk.lan (lowell-desk.lan [172.30.250.6]) by be-well.ilk.org (Postfix) with ESMTP id 7D8CB50820; Sat, 27 Dec 2008 10:49:07 -0500 (EST) Received: by lowell-desk.lan (Postfix, from userid 1147) id D74361D12B; Sat, 27 Dec 2008 10:49:05 -0500 (EST) To: "Alain G. Fabry" References: <20081225162900.GA10942@desmo.3rdrock.kicks-ass.net> From: Lowell Gilbert Date: Sat, 27 Dec 2008 10:49:04 -0500 In-Reply-To: <20081225162900.GA10942@desmo.3rdrock.kicks-ass.net> (Alain G. Fabry's message of "Thu\, 25 Dec 2008 17\:29\:00 +0100") Message-ID: <447i5l7h5b.fsf@lowell-desk.lan> User-Agent: Gnus/5.11 (Gnus v5.11) Emacs/22.3 (berkeley-unix) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: freebsd-questions@freebsd.org Subject: Re: SMP and ACPI problem ?? X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: freebsd-questions@freebsd.org List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 27 Dec 2008 15:49:11 -0000 "Alain G. Fabry" writes (in *extremely* long lines, which I wrapped for him): > To make a long story short....everything worked fine on my system > (7.0-RELEASE FreeBSD). Last night I was updating stuff on my windoswXP > guess (under qemu) and performed a clean shutdown. > > This morning, after bringing back up my system it has been unbearably > slow. Without doing anyting to FreeBSD, it suddenly started working in > SMP mode -> recognizing my 2 processors. Before, it never did > this...and looking at the speed it is going now, I'm happy it didn't. > > After googling a bit, I tried to disable ACPI in order to fall back to > single processor mode, but my system keeps acting up like it never did > before. Very slow booting and KDM/KDE loading. Once up it's ok until I > run a portupgrade or such. That's weird all right. My first guess would be interrupt problems. vmstat(8) will show you what is happening on that front. > 1. What are some suggestions as to make it run 'normal' again? > You need to understand what's going wrong first. > 2. Is it possible to make it actually run better in SMP mode? Your system has an SMP kernel, I presume? [The GENERIC kernel does, these days.] > 3. Can my updates on the Qemu WindowsXP host make my FreeBSD system > suddenly recognize the 2nd CPU? -> this doesn't make sense to me but > that's the only thing I worked on last night. Vanishingly unlikely, but not completely impossible. > I hope I can get some pointers as to what could have caused this and > what I can do to get it back to the way it was. I wouldn't be surprised if it were a hardware problem, which can be tricky to trace down from the software side. -- Lowell Gilbert, embedded/networking software engineer, Boston area http://be-well.ilk.org/~lowell/