With the recent patches I posted on this list it should be now possible to run multiple ptp4l and phc2sys instances providing SHM refclocks which can be used with other time sources (NTP or other reference clocks) by chronyd or ntpd to synchronize the system clock.
In my testing it seems to be working well so far. A problem is that preparing the configuration and starting the processes manually is tedious and annoying, the uds paths must match between ptp4l and phc2sys, the SHM segment number must match between ptp4l/phc2sys and chronyd/ntpd, etc. I think there should be a better way to do this than writing a custom script for each use case. I've started working on a program that should make this easier. It will read a configuration file describing all time sources, check which interfaces have (and share) a PHC, generate configuration files for ptp4l and chronyd/ntpd, and start the ptp4l, phc2sys, chronyd/ntpd processes as necessary. Then, it will just wait for a signal to kill the processes and remove the generated configuration files. The configuration file could look like this: [ptp-domain 0] interfaces eth0 eth1 [ptp-domain 1] interfaces eth2 delay_mechanism P2P [ntp-server 10.1.1.1] minpoll 3 maxpoll 3 [ntp-server 10.1.1.2] I want to include support for PTP and NTP used as a slave/client first. Server/master configuration and support for other time sources could be added later if there is interest. Other sources could include PHC specified directly, GPS without PPS (SHM refclock provided by gpsd), GPS with PPS, PPS device specified directly, PPS of a PHC, or a PPS over serial port (enabled by ldattach). They could be configured like this: [ptp-clock /dev/ptp2] offset 35 [gps /dev/ttyS0] [pps-gps /dev/ttyS1] [pps-device /dev/pps0] [pps-phc eth2] [pps-serial /dev/ttyS2] Would you be interested in including this program in linuxptp? Are dependencies on external programs acceptable? -- Miroslav Lichvar ------------------------------------------------------------------------------ Want fast and easy access to all the code in your enterprise? Index and search up to 200,000 lines of code with a free copy of Black Duck Code Sight - the same software that powers the world's largest code search on Ohloh, the Black Duck Open Hub! Try it now. http://p.sf.net/sfu/bds _______________________________________________ Linuxptp-devel mailing list Linuxptp-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linuxptp-devel
