Hi all, We used snmpwalk to get some network interface statistics, e.g. ifInOctets. But, after we changed the system time from 4:00 pm to 3:00 pm, the output seemed never updating for a long time. Having a glance at the source code, i set the IFTABLE_CACHE_TIMEOUT form 30 to 1, and changed the cache->enabled to 0, yet it seemed neither of them made sense. Did i miss something? In addition, i think using *gettimeofday* to determine whether a timeout occurs is a bit problematic. Actually, the system time may be changed for some reasons, and the delta could be negative. If the system time was changed to long before, the cache would stay unflushed for long. We'd better to use a monotonic clock, like clock_gettime(CLOCK_MONOTONIC,...), right?
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