On Tue, Apr 14, 2020 at 07:34:32PM -0700, Ahmad Byagowi wrote: > Given the fact that PTP4L makes the adjustments to NIC's oscillator > frequency and prints the PPB value, what is the NIC card's nominal > oscillator frequency? I am assuming that is needed in order to convert the > PPB values into standard frequency (Hz).
The frequency of the NIC's internal clock is known only to the driver. The ptp4l software doesn't know or care about that, because the kernel interface allows adjusting the clock rate in terms of parts per million (with a 16 bit fractional part). The driver converts the dialed PPM value into whatever adjustment is needed by the hardware. Thanks, Richard _______________________________________________ Linuxptp-users mailing list Linuxptp-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linuxptp-users
