[ntp:questions] Re: ntp? return value for use in scripts

Maciej W. Rozycki macro at ds2.pg.gda.pl
Tue Jan 27 12:11:03 UTC 2004

On Mon, 26 Jan 2004, Harlan Stenn wrote:

> Also, there is a --enable-sync-todr (or something) option that may make
> this even easier for you.

 Note that syncing a TOY clock within ntpd (i.e. doing it frequently) may
disrupt the operation of the timer tick if the TOY clock is used as a
timer interrupt source (which depends on hardware capabilities and
software configuration).  I observe it on a few Linux systems;
unfortunately unpatched Linux does not allow disabling this syncing.  For
systems in continuous service, writing the system time back to the TOY
clock upon a shutdown should suffice; if abrupt system shutdowns are
possible, the TOY clock could be additionally synced once per day or so.

+  Maciej W. Rozycki, Technical University of Gdansk, Poland   +
+        e-mail: macro at ds2.pg.gda.pl, PGP key available        +

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