Date: Sun, 19 Aug 2001 13:14:56 +0930 From: Greg Lehey <grog@FreeBSD.org> To: Mario Doria <mariodoria@yahoo.com> Cc: Sean Davis <dive-fb@endersgame.net>, freebsd-questions@freebsd.org Subject: Re: microuptime() oddness Message-ID: <20010819131455.D35750@wantadilla.lemis.com> In-Reply-To: <20010819034229.47195.qmail@web14203.mail.yahoo.com>; from mariodoria@yahoo.com on Sat, Aug 18, 2001 at 08:42:29PM -0700 References: <20010819130006.C35750@wantadilla.lemis.com> <20010819034229.47195.qmail@web14203.mail.yahoo.com>
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[Format recovered--see http://www.lemis.com/email/email-format.html] Your MUA wraps quoted text incorrectly. On Saturday, 18 August 2001 at 20:42:29 -0700, Mario Doria wrote: > > --- Greg Lehey <grog@FreeBSD.org> wrote: >> On Monday, 13 August 2001 at 3:25:37 -0400, Sean Davis wrote: >>> Hello, I have a machine (AMD Athlon 1.2ghz, 256MB ram) running >>> FreeBSD-stable, and have been noticing a lot of weird kernel debug >>> messages like: >>> >>> microuptime() went backwards (7718.041075 -> 7718.-695325418) >>> calcru: negative time of -1984433927 usec for pid 365 (setiathome) >>> <repeat many, many times> >>> >>> Does anyone have any idea whats causing this? >> >> It's a bug which seems to be triggered by something to do with AMD >> processors, though we're not sure whether it's the processor or >> (more likely) the BIOS. If you disable APM, it should go away. I >> have four AMD processors here, and they all showed it with APM >> enabled. > > I got the same results on a Celeron @ 500MHZ on a ThinkPad A20m Laptop. > I had installed XFree86-4.1 and KDE2. When I was changing my default > fixed width font, XFree would crash and I would be back at the console > with lots of messages like "microuptime went backwards" and then how > much it went backwards. This happened also with XFree 4.0.3 and on two > fresh installs. I don't remember if it had apm enabled, I think it did. > > Sorry I cannot give more details, but that machine right now is with > IBM because of hard disk problems. Hmm. Interesting. I have a ThinkPad T22, and I haven't had problems with it. Has anybody else had problems of this nature with ThinkPads? It's a relatively serious issue with laptops, since you probably want to use APM. Greg -- When replying to this message, please copy the original recipients. If you don't, I may ignore the reply. For more information, see http://www.lemis.com/questions.html See complete headers for address and phone numbers To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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