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refclock: don't include average dispersion in unfiltered samples

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The dispersion of refclock samples before filtering now includes only
offset correction error and precision.

This should fix a problem where locked PPS got stuck with large average
dispersion and didn't accept new samples due failing check of offset
and dispersion.
This commit is contained in:
Miroslav Lichvar 2014-05-23 15:22:11 +02:00
parent b745b6d546
commit 26e00ffbeb
1 changed files with 4 additions and 4 deletions
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8
refclock.c
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@ -351,7 +351,7 @@ RCL_AddSample(RCL_Instance instance, struct timeval *sample_time, double offset,
LCL_GetOffsetCorrection(sample_time, &correction, &dispersion);
UTI_AddDoubleToTimeval(sample_time, correction, &cooked_time);
dispersion += instance->precision + filter_get_avg_sample_dispersion(&instance->filter);
dispersion += instance->precision;
if (!valid_sample_time(instance, sample_time))
return 0;
@ -391,7 +391,7 @@ RCL_AddPulse(RCL_Instance instance, struct timeval *pulse_time, double second)
leap = LEAP_Normal;
LCL_GetOffsetCorrection(pulse_time, &correction, &dispersion);
UTI_AddDoubleToTimeval(pulse_time, correction, &cooked_time);
dispersion += instance->precision + filter_get_avg_sample_dispersion(&instance->filter);
dispersion += instance->precision;
if (!valid_sample_time(instance, pulse_time))
return 0;
@ -418,6 +418,8 @@ RCL_AddPulse(RCL_Instance instance, struct timeval *pulse_time, double second)
return 0;
}
ref_dispersion += filter_get_avg_sample_dispersion(&refclocks[instance->lock_ref].filter);
UTI_DiffTimevalsToDouble(&sample_diff, &cooked_time, &ref_sample_time);
if (fabs(sample_diff) >= 2.0 / rate) {
DEBUG_LOG(LOGF_Refclock, "refclock pulse ignored samplediff=%.9f",
@ -829,8 +831,6 @@ filter_get_sample(struct MedianFilter *filter, struct timeval *sample_time, doub
y /= n;
e /= n;
e -= sqrt(filter->avg_var);
if (n >= 4) {
double b0, b1, s2, sb0, sb1;