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hwclock: don't drop valid samples in HCL_ProcessReadings()

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Modify the HCL_ProcessReadings() function to try to always provide
a valid sample. Instead of dropping a sample outside of the expected
delay, provide its assumed quality level as a small integer (relative to
already accumulated samples), and let the caller decide what quality is
acceptable.
This commit is contained in:
Miroslav Lichvar
2025-08-11 16:00:38 +02:00
parent f78e4681ef
commit 5535384878
5 changed files with 38 additions and 20 deletions
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5
ntp_io_linux.c
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@@ -519,7 +519,7 @@ poll_phc(struct Interface *iface, struct timespec *now)
struct timespec sample_phc_ts, sample_sys_ts, sample_local_ts;
struct timespec phc_readings[PHC_READINGS][3];
double phc_err, local_err, interval;
int n_readings;
int n_readings, quality;
if (!HCL_NeedsNewSample(iface->clock, now))
return;
@@ -543,7 +543,8 @@ poll_phc(struct Interface *iface, struct timespec *now)
return;
if (!HCL_ProcessReadings(iface->clock, n_readings, phc_readings,
&sample_phc_ts, &sample_sys_ts, &phc_err))
&sample_phc_ts, &sample_sys_ts, &phc_err, &quality) ||
quality <= 0)
return;
LCL_CookTime(&sample_sys_ts, &sample_local_ts, &local_err);