Saved Clock Frequency Correction Data

Enhanced PTP User Guide (UG1602)

Document ID
UG1602
Release Date
2022-10-18
Revision
1.0 English

For each supported adapter clock and for the server system clock, sfptpd will save the current frequency correction value every 60 seconds. If the server is rebooted or if sfptpd is restarted, the last saved value is used to continue clock frequency adjustment rather than revert to a zero value which would delay re-synchronization to an external master clock (or re-synchronization to the LRC if the adapter clock is not the active clock receiving from the remote master clock).

Frequency correction files are saved in /var/lib/sfptpd. Refer to Table 1 for details.