From owner-freebsd-stable@FreeBSD.ORG Wed Sep 29 17:35:15 2010 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id C1796106567A for ; Wed, 29 Sep 2010 17:35:15 +0000 (UTC) (envelope-from jdc@koitsu.dyndns.org) Received: from qmta01.emeryville.ca.mail.comcast.net (qmta01.emeryville.ca.mail.comcast.net [76.96.30.16]) by mx1.freebsd.org (Postfix) with ESMTP id A225D8FC16 for ; Wed, 29 Sep 2010 17:35:15 +0000 (UTC) Received: from omta06.emeryville.ca.mail.comcast.net ([76.96.30.51]) by qmta01.emeryville.ca.mail.comcast.net with comcast id CbtW1f00416AWCUA1hbFx2; Wed, 29 Sep 2010 17:35:15 +0000 Received: from koitsu.dyndns.org ([98.248.41.155]) by omta06.emeryville.ca.mail.comcast.net with comcast id ChbE1f0033LrwQ28ShbESQ; Wed, 29 Sep 2010 17:35:14 +0000 Received: by icarus.home.lan (Postfix, from userid 1000) id CCEA99B418; Wed, 29 Sep 2010 10:35:13 -0700 (PDT) Date: Wed, 29 Sep 2010 10:35:13 -0700 From: Jeremy Chadwick To: Chuck Swiger Message-ID: <20100929173513.GA95222@icarus.home.lan> References: <20100224165203.GA10423@zod.isi.edu> <20100927170317.I90633@sola.nimnet.asn.au> <4CA0E892.4010204@gmail.com> <201009271621.17669.jkim@FreeBSD.org> <4CA2488D.7000101@gmail.com> <04FA16F2-26AD-425D-9E4A-2A923219B73E@mac.com> <4CA35E64.1040101@gmail.com> <0FDB4144-8BE4-4BA5-B911-8652E07D60C2@mac.com> <20100929170757.GA94672@icarus.home.lan> <2B9D8374-AA0A-4F2C-9681-5216204859F8@mac.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <2B9D8374-AA0A-4F2C-9681-5216204859F8@mac.com> User-Agent: Mutt/1.5.21 (2010-09-15) Cc: freebsd-stable@freebsd.org, Vitaly Magerya Subject: Re: resume slow on Thinkpad T42 FreeBSD 8-STABLE 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: Wed, 29 Sep 2010 17:35:15 -0000 On Wed, Sep 29, 2010 at 10:16:13AM -0700, Chuck Swiger wrote: > On Sep 29, 2010, at 10:07 AM, Jeremy Chadwick wrote: > > On Wed, Sep 29, 2010 at 09:57:53AM -0700, Chuck Swiger wrote: > >> > >> I doubt repeated coincidences. :-) Is prime95 testing running stable after waking from sleep? > > > > He's not running Prime95 (native Win32 app), he's running > > ports/math/mprime under FreeBSD natively. I don't know if this > > application stresses hardware to the same degree Prime95 does; I've used > > Prime95 many times to burn in new workstations. > > It's doing the same math operations; something like "mprime -t" is the same as the Win32 test mode per the docs: > > -t Run the torture test. Same as Options/Torture Test. > > > The Thinkpad hardware he's on is """old""" (note the quotes), so I > > wouldn't be surprised if the CPU (Intel Pentium M) happens to induce a > > strange/odd MCA event as a result of going in/out of sleep state. It > > could be a general system bug of some sort as well (one which has no > > repercussions). > > That sounds reasonable to me, but I'm wary of uncorrected errors which seem to be reproducible to specific circumstances. > > > Look at it this way: if his L1 cache was going bad, his system would be > > freaking out doing literally anything (booting the kernel for example); > > I'm under the impression Pentium M CPUs do not have ECC L1 cache. > > Sure, if the MCA report is reflecting a legitimate problem, and it was happening more often than every few minutes, and it happened after a cold reboot rather than after wakeup from sleep.... :-) > > I place more faith in ~17 hours of Prime95/mprime working OK to validate that the hardware is not obviously broken. Oh, absolutely. If anything my statement was indirectly agreeing with your recommended test (sans being unsure how mprime behaved). :-) I wonder if there's CPU errata or something along those lines which might explain the behaviour. -- | Jeremy Chadwick jdc@parodius.com | | Parodius Networking http://www.parodius.com/ | | UNIX Systems Administrator Mountain View, CA, USA | | Making life hard for others since 1977. PGP: 4BD6C0CB |