[ntp:questions] Re: ntp only support sys_precision to microsecond?
Piotr Trojanek
ptrojane at mion.elka.pw.edu.pl
Fri Dec 19 10:52:00 UTC 2003
On 2003-12-19, Dongling Duan <duan at cisco.com> wrote:
> HI,
>
> I try to understand the default_get_precision() in ntp_proto.c.
>
> It seems that we could only get microsecond precision since the
> MINSTEP is 5 us. It means the best sys_precision we could get is -18,
> even though getclock() could give us nanoseconds precision. In the
> caculation, we just throw away the nanoseconds part and only keep to
> miscroseconds part.
>
> Does that mean that ntp protocol only has miscroseconds accuracy?
> Could somebody let me know the importance of the sys_precision variable?
>
> Thanks
> -dongling
--
Piotr Trojanek
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