faraphel/chrony
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

hwclock: return timestamp error

Browse source 
For now, when converting a raw timestamp, return error of the last
sample as the maximum error of the timestamp. This is needed to include
the PHC reading delay in the NTP dispersion.
This commit is contained in:
Miroslav Lichvar 2017-01-04 15:46:41 +01:00
parent 96cc80ffc8
commit ed904f08a4
1 changed files with 6 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

8
hwclock.c
View file

@ -55,6 +55,9 @@ struct HCL_Instance_Record {
/* Number of samples */
int n_samples;
/* Maximum error of the last sample */
double last_err;
/* Flag indicating the offset and frequency values are valid */
int valid_coefs;
@ -151,6 +154,7 @@ HCL_AccumulateSample(HCL_Instance clock, struct timespec *hw_ts,
clock->n_samples++;
clock->hw_ref = *hw_ts;
clock->local_ref = *local_ts;
clock->last_err = err;
/* Get new coefficients */
clock->valid_coefs =
@ -196,9 +200,9 @@ HCL_CookTime(HCL_Instance clock, struct timespec *raw, struct timespec *cooked,
offset = clock->offset + elapsed / clock->frequency;
UTI_AddDoubleToTimespec(&clock->local_ref, offset, cooked);
/* Estimation of the error is not implemented yet */
/* Fow now, just return the error of the last sample */
if (err)
*err = 0.0;
*err = clock->last_err;
return 1;
}