calcru issues

[da Kangawallafox]

Hi all

Does anybody know how I can stop constant calcru:negative time of XXXX
usec for pidxxx.  I have just recently installed freebsd on an old amdk6
533mhz ibm computer.  I am not running x-windows and have tried to run
sysctl kern.timecounter.method=1 as suggested on a number of web pages but
that returns an error of unknown oid 'kern.timecounter.method'.  I am
running 5.2.1 release but this problem also exists with earlier releases
of freebsd.  Any help would be appreciated as I am very new to freebsd and
wanting to learn more about it.

Cheers
Shaun