On Tue, Nov 02, 2021 at 01:34:01AM +0200, Vladimir Oltean wrote: > On Mon, Nov 01, 2021 at 03:56:38AM -0700, Richard Cochran wrote: > > On Mon, Nov 01, 2021 at 11:19:15AM +0200, Vladimir Oltean wrote: > > > > > For what it's worth, I have solved both my problems (checking ptp4l sync > > > and phc2sys sync) through alternative methods, > > > > How did you do it? > > For checking ptp4l sync I wrote my own PTP management message handling > over the local AF_UNIX socket and I am querying the CURRENT_DATA_SET. > For checking phc2sys sync I shamelessly stole the relevant logic from > phc2sys (read_phc/sysoff_measure), including the various PTP_SYS_OFFSET_* > ioctls, and I am just calculating the PHC's offset to CLOCK_REALTIME. > > So both of these are local. Then I created some communication protocol > in my application (sender and receiver roles) so that the sender queries > the receiver about its local sync data, and then has the logic necessary > to figure out whether now is a good time to send or not.
Since it's GPL code that I shamelessly stole, it might be nice to also share the source code here (in case somebody else looking to solve the same problem wants to shamelessly steal mine): https://github.com/vladimiroltean/tsn-scripts/tree/master/isochron The relevant files are ptpmon.c (for ptp4l monitoring) and sysmon.c (for phc2sys monitoring). _______________________________________________ Linuxptp-devel mailing list Linuxptp-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linuxptp-devel
