Hal Murray hmurray at
Thu Oct 6 05:48:42 UTC 2016

esr at said:
>> It might be useful to make sure that any workaround for
>> OS X is general enough to handle another case.
> It will be. We just fall back to the old BSD adjtime(2) call, which
> everybody (even OS X) has. 

Thanks.  That explains why/how it works and why the results are so crappy.  
That procedure can only slew the clock, no drift correction.  The crappiness 
will depend on your luck and/or temperature.  A crystal that happens to be 
more accurate will drift less between corrections.

In the context of TESTFRAME, we can have 2 sets of replay files.  One for 
systems that implement ntp_adjtime, and another set for systems using adjtime 
(no x).  So far, only OS X and OpenBSD are in the latter category.

These are my opinions.  I hate spam.

More information about the devel mailing list