[ntp:questions] testing slew only mode (-x), not slewing correctly (linux sles10, ntpd v 4.1.1)

Unruh unruh-spam at physics.ubc.ca
Fri Oct 23 17:08:54 UTC 2009


E-Mail Sent to this address will be added to the BlackLists <Null at BlackList.Griffin-Technologies.invalid> writes:

>Richard B. Gilbert wrote:
> > BlackList wrote:
> >> I guess I could see 10 minutes (or more) if the time had
> >>  never been set to anything reasonable;  However 10 minutes
> >>  seems really far out for something that was previously
> >>  syncing with NTP servers (or any other source of time).
> >>
> > I don't see what "previously synching" has to do with anything.
> > If previously synching means three weeks ago, it's meaningless!
> > If it means thirty minutes ago, I would expect the clock to be
> > within a few milliseconds of the correct time.  If not I would
> > regard the clock as broken!  I'm assuming reasonably constant
> > temperature!

>If over three weeks, a cheap generic RTC gets out by 10 minutes,
>  it is broken.  Thats an average of 1.6 seconds drift, in the
>  same direction, every hour?

10 min in three weeks is about 300PPM, which is not that rediculous. You might call it
broken but not seriously.


>-- 
>E-Mail Sent to this address <BlackList at Griffin-Technologies.net>
>  will be added to the BlackLists.




More information about the questions mailing list