[Soekris] severe clock drift on net6501
soekris at dm.cobite.com
Tue Sep 10 16:19:44 CEST 2013
I'm just completing the OS install (centos 6.4) on a new net6501.
After getting NTP setup, I noticed it wouldn't ever synchronize, and
every 15 1/2 minutes, a large adjustment would be made to the system clock:
Sep 9 10:12:54 hadrian ntpd: time reset -0.626500 s
Sep 9 10:28:20 hadrian ntpd: time reset -0.643714 s
Sep 9 10:43:29 hadrian ntpd: time reset -0.606849 s
Sep 9 10:58:45 hadrian ntpd: time reset -0.633372 s
Fairly consistently .6 seconds every 15 1/2 minutes or so. I'm
wondering if this is indicative of faulty hardware?
I have a workaround:
After reading around, I used adjtimex to determine an adjustment to the
kernel parameters, and ran this:
adjtimex --tick 9987 --freq 3533487
Now NTP is happy and has synchronized the system clock.
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