[Soekris] Time drift on a net4801

[Chuck Yerkes]

Quoting Robbie Stone (robbie at serendipity.palo-alto.ca.us):
> Hi,
> 
> I'm running OpenBSD 3.5 on a net4801 with NTP v4.1.1c-rc1 at 1.836 and I keep
> seeing time slew errors reported in my syslog. 

So around .2 - .3 seconds every 4 hours or so.
Which is corrected.

Not ideal,but survivable (and in discussion in threads previous
and one currently).


> Jul 23 14:25:27 charon ntpd[19849]: time slew -0.344605 s
> Jul 23 23:31:34 charon ntpd[19849]: time slew 0.183619 s
> Jul 24 03:13:35 charon ntpd[19849]: time slew -0.238044 s
> Jul 24 05:13:03 charon ntpd[19849]: time slew 0.235565 s
> Jul 24 06:12:51 charon ntpd[19849]: time slew -0.212560 s
> Jul 24 07:55:23 charon ntpd[19849]: time slew 0.197873 s
> Jul 24 09:37:46 charon ntpd[19849]: time slew -0.185680 s
> Jul 24 11:37:16 charon ntpd[19849]: time slew 0.171464 s
> Jul 24 13:19:42 charon ntpd[19849]: time slew -0.201864 s
> Jul 24 13:36:47 charon ntpd[19849]: time slew -0.182646 s
> Jul 24 13:53:49 charon ntpd[19849]: time slew 0.272825 s
> Jul 24 14:53:41 charon ntpd[19849]: time slew -0.311513 s
> Jul 24 15:10:43 charon ntpd[19849]: time slew -0.181630 s
> 
> It seems like the time is drifting quite a bit. Has anyone else run into this? 
> Should I be tuning a kernel option or changing the timer values to compensate
> for the constant clock drift? NTP is mitigating the problem, of course, but
> without being synced it would drift way the heck off :-\ Not exactly what I'd
> like..

"Way".  like over 1 second/day.

Clearly you've never run a SPARC Station.  With a modem or serial bitpad.
(20-300 seconds/day).