[ntp:questions] no PPS on WinNT ntpd, okay on freebsd.

Dave Hart davehart at gmail.com
Mon Feb 13 11:04:18 UTC 2012


On Sun, Feb 12, 2012 at 19:04, Mark C. Stephens <marks at non-stop.com.au> wrote:
> No PPS on Winnt but works okay on freebsd with exactly the same config:

That configuration uses flag3 1 to request via PPSAPI that the kernel
synchronize directly to the PPS.  That's a no-go using serialpps.sys
PPSAPI on Windows, as Windows doesn't have the precision kernel
timekeeping extensions needed.  For the same reason, it's pointless to
include "ntpq -c kern" output from FreeBSD in the context of comparing
with Windows, which does not have extensions for which kerninfo is
displaying stats on FreeBSD.

Without flag3 1 you should avoid causing refclock_nmea.c to give up on
PPSAPI due to error from serialpps.sys/serialpps-ppsapi-provider.dll
when requesting unimplemented functionality.

Bleary-eyed and wondering if I'll ever catch up with this list/group traffic,
Dave Hart


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