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refclock: make maximum lock age configurable

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The maxlockage option specifies in number of pulses how old can be
samples from the refclock specified by the lock option to be paired with
the pulses. Increasing this value is useful when the samples are
produced at a lower rate than the pulses.
This commit is contained in:
Miroslav Lichvar
2016-12-08 14:40:11 +01:00
parent 8c11044ee2
commit 9a901e1cb0
4 changed files with 15 additions and 1 deletions
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4
refclock.c
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@@ -77,6 +77,7 @@ struct RCL_Instance_Record {
int leap_status;
int pps_rate;
int pps_active;
int max_lock_age;
struct MedianFilter filter;
uint32_t ref_id;
uint32_t lock_ref;
@@ -202,6 +203,7 @@ RCL_AddRefclock(RefclockParameters *params)
inst->leap_status = LEAP_Normal;
inst->pps_rate = params->pps_rate;
inst->pps_active = 0;
inst->max_lock_age = params->max_lock_age;
inst->lock_ref = params->lock_ref_id;
inst->offset = params->offset;
inst->delay = params->delay;
@@ -444,7 +446,7 @@ RCL_AddPulse(RCL_Instance instance, struct timespec *pulse_time, double second)
ref_dispersion += filter_get_avg_sample_dispersion(&lock_refclock->filter);
sample_diff = UTI_DiffTimespecsToDouble(&cooked_time, &ref_sample_time);
if (fabs(sample_diff) >= 2.0 / rate) {
if (fabs(sample_diff) >= (double)instance->max_lock_age / rate) {
DEBUG_LOG(LOGF_Refclock, "refclock pulse ignored samplediff=%.9f",
sample_diff);
return 0;