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hwclock: refactor processing of PHC readings

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Move processing of PHC readings from sys_linux to hwclock, where
statistics can be collected and filtering improved.

In the PHC refclock driver accumulate the samples even if not in the
external timestamping mode to update the context which will be needed
for improved filtering.
This commit is contained in:
Miroslav Lichvar
2022-06-07 15:03:14 +02:00
parent c23c0b8484
commit 09b7f77f9a
7 changed files with 141 additions and 107 deletions
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7
hwclock.h
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@@ -30,7 +30,7 @@ typedef struct HCL_Instance_Record *HCL_Instance;
/* Create a new HW clock instance */
extern HCL_Instance HCL_CreateInstance(int min_samples, int max_samples,
double min_separation);
double min_separation, double precision);
/* Destroy a HW clock instance */
extern void HCL_DestroyInstance(HCL_Instance clock);
@@ -38,6 +38,11 @@ extern void HCL_DestroyInstance(HCL_Instance clock);
/* Check if a new sample should be accumulated at this time */
extern int HCL_NeedsNewSample(HCL_Instance clock, struct timespec *now);
/* Process new readings of the HW clock in form of (sys, hw, sys) triplets and
produce a sample which can be accumulated */
extern int HCL_ProcessReadings(HCL_Instance clock, int n_readings, struct timespec tss[][3],
struct timespec *hw_ts, struct timespec *local_ts, double *err);
/* Accumulate a new sample */
extern void HCL_AccumulateSample(HCL_Instance clock, struct timespec *hw_ts,
struct timespec *local_ts, double err);