alcru negative time

[Matthew Seaman]

On Thu, Mar 25, 2004 at 01:01:30PM -0800, Marcel wrote:
> After installed freeBSD 5.2.1 when botting a lot of
> messages saying something like alcru negative time for
> PID...
> I?m a novice at freeBSD, and that?s looks like an
> error..what may be causing this?how to solve?

That's "calcru: negative time" -- an error message that
(unfortunately) shows up for any number of reasons.

Often the cause is buggy hardware, but sometimes it can be a software
problem.

For example there's:

    http://groups.google.co.uk/groups?hl=en&lr=&ie=UTF-8&oe=UTF-8&safe=off&threadm=fa.g80oftc.186qv3o%40ifi.uio.no&rnum=7&prev=/groups%3Fq%3Dcalcru%2Bnegative%2Btime%26hl%3Den%26lr%3D%26ie%3DUTF-8%26oe%3DUTF-8%26safe%3Doff%26sa%3DN%26scoring%3Dd

However, unless you're doing some sort of specific action that
triggers that particular case, that is unlikely to be the root cause
of what you're seeing.

See microtime(9) for an explanation of where this comes from.  The
solution given there, ie:

    # sysctl -w kern.timecounter.method=1

is a good thing to try first.

	Cheers,

	Matthew


-- 
Dr Matthew J Seaman MA, D.Phil.                       26 The Paddocks
                                                      Savill Way
PGP: http://www.infracaninophile.co.uk/pgpkey         Marlow
Tel: +44 1628 476614                                  Bucks., SL7 1TH UK
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