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ntp: use monotonic time for replacement interval

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Avoid errors in the measured interval due to clock steps.
This commit is contained in:
Miroslav Lichvar 2023-06-06 10:40:51 +02:00
parent 05809e937c
commit ab8da7ecb9
1 changed files with 5 additions and 6 deletions
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11
ntp_sources.c
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@ -1006,11 +1006,10 @@ resolve_source_replacement(SourceRecord *record, int refreshment)
void
NSR_HandleBadSource(IPAddr *address)
{
static struct timespec last_replacement;
struct timespec now;
static double last_replacement = -1e6;
SourceRecord *record;
IPAddr ip_addr;
double diff;
double now;
int slot;
if (!find_slot(address, &slot))
@ -1025,9 +1024,9 @@ NSR_HandleBadSource(IPAddr *address)
return;
/* Don't resolve names too frequently */
SCH_GetLastEventTime(NULL, NULL, &now);
diff = UTI_DiffTimespecsToDouble(&now, &last_replacement);
if (fabs(diff) < RESOLVE_INTERVAL_UNIT * (1 << MIN_REPLACEMENT_INTERVAL)) {
now = SCH_GetLastEventMonoTime();
if (now - last_replacement <
RESOLVE_INTERVAL_UNIT * (1 << MIN_REPLACEMENT_INTERVAL)) {
DEBUG_LOG("replacement postponed");
return;
}