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timedated: ignore initial delta in history data

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This commit is contained in:
Kay Sievers 2014-04-10 12:58:10 -07:00
parent 1b89cf5648
commit d8c21348df
1 changed files with 7 additions and 3 deletions
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10
src/timedate/timedate-sntp.c
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@ -399,6 +399,12 @@ static bool sntp_sample_spike_detection(SNTPContext *sntp, double offset, double
double jitter;
double j;
sntp->packet_count++;
/* ignore initial sample */
if (sntp->packet_count == 1)
return false;
/* store the current data in our samples array */
idx_cur = sntp->samples_idx;
idx_new = (idx_cur + 1) % ELEMENTSOF(sntp->samples);
@ -406,10 +412,8 @@ static bool sntp_sample_spike_detection(SNTPContext *sntp, double offset, double
sntp->samples[idx_new].offset = offset;
sntp->samples[idx_new].delay = delay;
sntp->packet_count++;
jitter = sntp->samples_jitter;
/* calculate new jitter value from the RMS differences relative to the lowest delay sample */
jitter = sntp->samples_jitter;
for (idx_min = idx_cur, i = 0; i < ELEMENTSOF(sntp->samples); i++)
if (sntp->samples[i].delay > 0 && sntp->samples[i].delay < sntp->samples[idx_min].delay)
idx_min = i;