> ... and if you are not using gpsd ? If you have PPS hardware, there are 3 approaches.
You can use GPSD. It will use the kernel PPS capture if the kernel supports it. If not, it will try user mode timing. I think that is only available on Linux. You can use the PPS driver. That requires timepps.h to build and a few kernel modules (or the equivalent option built into the kernel): pps_core and pps_ldisc You can let the kernel do all the work. That's flag3 on the PPS driver. It works significantly better, but requires building your own kernel. It needs the CONFIG_NTP_PPS option. That needs not NoHZ and most distros ship kernels with NoHZ. -- These are my opinions. I hate spam. _______________________________________________ devel mailing list [email protected] http://lists.ntpsec.org/mailman/listinfo/devel
