[9fans] synchronization of time, setting time

[9fans] synchronization of time, setting time

[Rudolf Sykora]

Hello everyone,

1) If I want to set the hardware (on-board) clock by hand, how can I?
2) If I want to synchronize the hardware time with a ntp server (once
/ periodically), how can I?
3) If I run the 'timesync -n [ntp server]' command, how is the
frequency of synchronization determined? If I run it without any more
special parameters, it seems to synchronize every minute (from the
log, obtained with -l). That is, I think, unnecessarily too often.

Thanks
Ruda

Re: [9fans] synchronization of time, setting time

[erik quanstrom]

> 1) If I want to set the hardware (on-board) clock by hand, how can I?

date -n>/dev/rtc

> 2) If I want to synchronize the hardware time with a ntp server (once
> / periodically), how can I?

modify timesync.

> 3) If I run the 'timesync -n [ntp server]' command, how is the
> frequency of synchronization determined?

by the error in the measurement.  here's the output from my
log.  looks like its running about once a minute.

chula Jun 26 09:34:30 δ -1049724 avgδ 652049 hz 2660094075
chula Jun 26 09:35:30 δ -1233447 avgδ 942747 hz 2660093874

i can think of two reasons for bad measurements — specifying
an accuracy that is not attainable or running on a machine
with an unsyncronized tsc.  for example, certain pentium iv.

- erik