Re: [Linuxptp-users] clock_nanosleep on /dev/ptpX
PTP IEEE 1588 stack for Linux
Brought to you by:
rcochran
From: Koehrer M. (ETAS/ESW5) <mat...@et...> - 2014-02-19 15:03:52
|
Hi William > > To be precise CLOCK_REALTIME is synchronized with your PTP clock using > phc2sys, CLOCK_MONOTINIC not... According to "man clock_gettime" CLOCK_MONOTONIC Clock that cannot be set and represents monotonic time since some unspecified starting point. This clock is not affected by discontinuous jumps in the sys- tem time (e.g., if the system administrator manually changes the clock), but is affected by the incremental adjustments performed by adjtime(3) and NTP. I think that phc2sys uses clock_adjtime() to modify the clock. My thought was that this should effect CLOCK_REALTIME and CLOCK_MONOTONIC... But likely I am wrong. Regards Mathias |