[ntp:questions] Time reset

Martin Burnicki martin.burnicki at meinberg.de
Wed Mar 5 09:02:09 UTC 2008


> Hi Harlan,
> After going through the system logs it is found that approximately
> at the time when reset occurred (2-3 few minutes back) crond started
> its weekly routines. To make sure I ran "run-parts /etc/cron.weekly" and
> found that the system time went off by 2 secs then to 4 secs.
> So its true that when CPU load is high, kernel might be loosing ticks.
> When I repeated the same in other clients the drift was in the order of
> few milliseconds. I suppose it has something to do with the amount
> of CPU load and disk I/O when crond performs its tasks.

What tasks are specified in cron.weekly?

Could you run them one by one to see which one produces the time slew?

Do you also observe time slews if you run other tasks which cause much disk
and/or network I/O?

Martin Burnicki

Meinberg Funkuhren
Bad Pyrmont

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