1PPS statistical counters and error data is available from the following files:
/sys/class/net/eth<N>/device/pps_stats/<filename>where <filename> is one of the files listed in the following table.
Two sets of data are provided in the form of 1PPS offsets (min, max, mean and last) and 1PPS periods (min, max, mean and last). All measurements are in nanoseconds.
| File | Description |
|---|---|
| pps_off_min | Minimum offset value. |
| pps_off_max | Maximum offset value. |
| pps_off_mean | Average offset value observed over the last 8 values. |
| pps_off_last | Most recent offset value. |
| pps_per_min | Minimum 1PPS period. |
| pps_per_max | Maximum 1PPS period. |
| pps_per_mean | Average 1PPS period observed over the last 8 periods. |
| pps_per_last | Most recent 1PPS period. |
| pps_oflow |
Too many 1PPS values received. Operation is suspended until the next This can occur when a cable is connected or as the result of a bad signal or noise on the 1PPS input. Re-start the |
| pps_bad |
Very bad 1PPS period seen. The 1PPS period measured is too long to be a pulse per second i.e. period > 1 second. Check the 1PPS input is connected to a genuine 1PPS output. |