I was geeking out earlier today running some performance tests for an oracle 12c database (OL 7.3)
The vendor wanted some IO testing to optimize the block sizes for reads and writes.. well the PROD server isn't ready yet.. but the TEST server is.
Cisco UCS server (1x E5-2620 v4)
EMC XIO SAN
Well the IO testing was single threaded... but I could see the thread % around 40-60% and overall CPU was 3-5%.
It was hitting 23k-31k IOPS at 1550MB/s-2250MB/s
(NOTE: the SAN is not dedicated to this TEST server... there are a couple dozen other servers actively using it also)