ntp question

[Lars Hecking <lhecking@nmrc.ucc.ie>]

 I have installed the xntp package from ports. To find out how much
 the clock drifts, I'm using this short batch job found on Usenet:

# batch
tickadj -A
date ; ntpdate <server>
sleep 86400
date ; ntpdate <server>
^D

 tickadj is

-r-xr-xr-x  1 root  wheel  16384 Apr 24 18:29 /usr/local/sbin/tickadj*

 and I get this output:

tickadj: open /dev/kmem: Operation not permitted
KERNEL tick = 10000 usec (from _tick kernel variable)
PRESET tick = 10000 usec
KERNEL tickadj = 40 usec (from _tickadj kernel variable)
PRESET tickadj = 5 usec
KERNEL hz = 100
calculated hz = 100.00 Hz
recommended value of tickadj = 5 us

 Why can tickadj not open /dev/kmem? The job runs as root.

crw-r-----  1 root  kmem    2,   1 Apr 24 20:09 /dev/kmem

# uname -a
OpenBSD localhost 2.6 RUSTY#4 amiga