In article <[EMAIL PROTECTED]> "David J Taylor" <[EMAIL PROTECTED]> writes: >Harlan Stenn wrote: >>>>> In article <[EMAIL PROTECTED]>, >>>>> "David J Taylor" >>>>> <[EMAIL PROTECTED]> >>>>> writes: >> >> John> 5) [Make sure] you have "options PPS_SYNC" in your kernel config >> >> David> 5 - I have not done that explicity. How could I check that, >> and David> change it if required? It's been 10+ years since I ran >> UNIX. >> >> Assuming an x86 box, put the following in /usr/src/sys/i386/conf/PPS: >[] >[] > >Many thanks, Harlan. I'll look into this, although I am a little >disappointed to find that less than 24 hours after starting with FreeBSD >I'm having to recompile the kernel!
Well, using PPS_SYNC shouldn't be *required* to use the PPS signal on FreeBSD - what it does is make the kernel discipline the local clock directly from the PPS signal, but FreeBSD also supports the PPSAPI, to let ntpd collect the timestamps from the PPS signal. It should be possible to use this via the ATOM driver. I haven't personally verified any of this though (hence the "should"s) - and I guess PPS_SYNC may give better results, but it could be interesting to try both variants. --Per Hedeland [EMAIL PROTECTED] _______________________________________________ questions mailing list [email protected] https://lists.ntp.isc.org/mailman/listinfo/questions
