I am _definitely_ from the back of the peanut gallery when it comes to timekeeping, but since someone has mentioned networks, and since I have a little experience with that, at the risk of restating something already known to the timekeepers I'll point-out that many NIC's today have interrupt coalescing parameters, which are often set by default to favor CPU utilization and maximum throughput over latency. Some of these mechanisms are based on timers running in the NIC. Their effect can be seen in things like netperf TCP_RR tests.
ftp://ftp.cup.hp.com/dist/networking/briefs/nic_latency_vs_tput.txt has some jumbled results of what can change based on some tests I've run in the past. hth, rick jones -- oxymoron n, commuter in a gas-guzzling luxury SUV with an American flag these opinions are mine, all mine; HP might not want them anyway... :) feel free to post, OR email to rick.jones2 in hp.com but NOT BOTH... _______________________________________________ questions mailing list [email protected] https://lists.ntp.isc.org/mailman/listinfo/questions
