Date: Wed, 29 Sep 2010 10:07:57 -0700 From: Jeremy Chadwick <freebsd@jdc.parodius.com> To: Chuck Swiger <cswiger@mac.com> Cc: freebsd-stable@freebsd.org, Vitaly Magerya <vmagerya@gmail.com> Subject: Re: resume slow on Thinkpad T42 FreeBSD 8-STABLE Message-ID: <20100929170757.GA94672@icarus.home.lan> In-Reply-To: <0FDB4144-8BE4-4BA5-B911-8652E07D60C2@mac.com> 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>
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On Wed, Sep 29, 2010 at 09:57:53AM -0700, Chuck Swiger wrote: > Hi-- > > On Sep 29, 2010, at 8:42 AM, Vitaly Magerya wrote: > > The test run for 17 hours without any problems (or MCA messages), > > That part is good. At least starting from normal operation, your laptop is running stably under load.... > > > then I put the laptop for a 5 minute sleep, resumed the test, and after 30 > > minutes of it there are now two MCA messages in dmesg. Are they somehow > > related, or is this a coincidence? > > 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. 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). 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. -- | 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 |
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