From owner-freebsd-questions  Sun Sep  2 19:35:36 2001
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Date: Sun, 02 Sep 2001 21:35:25 -0500
From: Douglas Egan <degan@calcon.net>
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To: clemensF <rabat@web.de>
Cc: Greg Lehey <grog@FreeBSD.ORG>,
	FreeBSD Questions <questions@FreeBSD.ORG>
Subject: Re: microuptime() went backwards
References: <20010830060127.L19000@spotteswoode.yi.org> <20010831111324.A57354@wantadilla.lemis.com> <20010901002955.C708@spotteswoode.yi.org>
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I too just had these messages.  I was running some benchmark programs -
bonnie++ and postmark.  I misconfigured bonnie++ and had it generate 5
million files.  I think that is what did it, though I can't explain it.

I am going to try it again to see if I can duplicate it.

Anyone have any other explanation why these messages would come up?

I am using an Abit KT7A-RAID mother board with a 1.2 GHz Athlon running
at 900 MHz, 384 Meg ram.

FreeBSD dougbsd 4.4-RC FreeBSD 4.4-RC #1: Tue Aug 28 22:19:33

Doug Egan


clemensF wrote:
> 
> > Greg Lehey:
> 
> > [redirected to -questions; this is not a -stable issue]
> 
> it's not?  it has been ever since i installed freebsd, beginning with 2.8,
> now with 4.3!
> 
> > > doesn't this look like interrupts beeing masked for too long?
> > >
> > > clemens
> > >
> > > ps:  typical entries in `dmesg -a` look like:
> > >
> > >   Wed Aug 29 16:12:25 CEST 2001
> > >   microuptime() went backwards (7633.019507 -> 7633.019407)
> > >   pid 16331 (vile), uid 65534: exited on signal 6 (core dumped)
> > >   cd9660: RockRidge Extension
> > >   microuptime() went backwards (27387.137508 -> 27387.137407)
> > >   microuptime() went backwards (27888.555071 -> 27888.554971)
> > >   microuptime() went backwards (37977.157270 -> 37977.156967)
> > >
> > > happens from thrice up to a few dozen times, depending on load.
> > >
> > > the board is a gigabyte GA-5AA, super7 mainboard with a k6-2 550Mhz, the
> > > graphics are a "bulk" Xpert@play, agp interfaced.
> >
> > Try disabling APM.
> 
> it was never enabled, it's not in use, `apm` says: "/dev/apm not
> configured".  btw:  this is no laptop, it's a desktop machine.  and what's
> apm got to do with it?
> 
> clemens
> 
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