kernel	cpu time (user/sys/real)	# checks (rounded)	nagios latency (max/avg)	check exec time (max/avg)	profile
2.4.19+sched-2.4.19-rc2-A4+2G/2G split	36s/61s/141s	8500	1s/0.130s	1s/0.031s	profile
2.4.20 vanilla	40s/73s/141s	8500	1s/0.151s	1s/0.009s	profile
2.4.20-ac1	21s/1029s/308s	4000	79s/3.456s	1s/0.011s	profile
2.4.20-ac1 + spinlock pte_chain_(un)lock	21s/899s/276s	4000	72s/5.428s	1s/0.013s	profile
rh 8.0 2.4.18-18.8.0	23s/600s/187s	3800	84s/9.494s	2s/0.019s	n/a