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Set reference time to last sample instead of time on update

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This is done mainly to fix reported root dispersion to include max clock
error after selecting another source without new sample.
This commit is contained in:
Miroslav Lichvar
2011-04-11 17:52:04 +02:00
parent bb95c39356
commit c5587b60b2
4 changed files with 34 additions and 36 deletions
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27
sourcestats.c
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@@ -582,29 +582,30 @@ SST_GetSelectionData(SST_Stats inst, struct timeval *now,
/* ================================================== */
void
SST_GetTrackingData(SST_Stats inst, struct timeval *now,
SST_GetTrackingData(SST_Stats inst, struct timeval *ref_time,
double *average_offset, double *offset_sd,
double *accrued_dispersion,
double *frequency, double *skew)
double *frequency, double *skew,
double *root_delay, double *root_dispersion)
{
int i;
double elapsed_offset, elapsed_sample;
int i, j;
double elapsed_sample;
i = get_runsbuf_index(inst, inst->best_single_sample);
j = get_buf_index(inst, inst->best_single_sample);
*ref_time = inst->offset_time;
*average_offset = inst->estimated_offset;
*offset_sd = inst->estimated_offset_sd;
*frequency = inst->estimated_frequency;
*skew = inst->skew;
*root_delay = inst->root_delays[j];
UTI_DiffTimevalsToDouble(&elapsed_offset, now, &(inst->offset_time));
*average_offset = inst->estimated_offset + inst->estimated_frequency * elapsed_offset;
*offset_sd = inst->estimated_offset_sd + elapsed_offset * inst->skew;
UTI_DiffTimevalsToDouble(&elapsed_sample, now, &inst->sample_times[i]);
*accrued_dispersion = inst->skew * elapsed_sample;
UTI_DiffTimevalsToDouble(&elapsed_sample, &inst->offset_time, &inst->sample_times[i]);
*root_dispersion = inst->root_dispersions[j] + inst->skew * elapsed_sample;
#ifdef TRACEON
LOG(LOGS_INFO, LOGF_SourceStats, "n=%d freq=%f (%.3fppm) skew=%f (%.3fppm) avoff=%f offsd=%f accrdis=%f",
inst->n_samples, *frequency, 1.0e6* *frequency, *skew, 1.0e6* *skew, *average_offset, *offset_sd, *accrued_dispersion);
LOG(LOGS_INFO, LOGF_SourceStats, "n=%d freq=%f (%.3fppm) skew=%f (%.3fppm) avoff=%f offsd=%f disp=%f",
inst->n_samples, *frequency, 1.0e6* *frequency, *skew, 1.0e6* *skew, *average_offset, *offset_sd, *root_dispersion);
#endif
}