Not sure, but I think Oracle CPU cycles are probably some normalized unit of work rather than actual CPU cycles. After all different CPUs will do different amounts of work for the same number of CPU cycles, so actual physical CPU cycles isnt particularly useful.
This is not precisely the subject, sorry, but I have a question somewhat related to this thread :
Did someone else notice (not with Oracle specifically : I didn't take time to test) that Sun servers are significantly slower than PCs ? We have a 600 MHz SunFire V120 with 2 Gb 133 MHz Memory, and some benchmarks (C programs) showed dramatic performance gains on a 3 GHz PC with 512 Mb RAM (MUCH LESS expensive). I plan to do some benchmarks with Oracle in the next weeks to see if it confirms, but I wanted to know if somebody already experienced such a phenomenon. Are Sun machines so slow ?
With regards CPUspeed my twin 2.8 GHz P4s (with HT) show a CPUspeed of 794 so either it normalizes CPUspeed or it measures actual CPU cycles used during the time your gather system stats ran (also unlikely you will have 100% load on the CPU during this time).
As regards Sun V120 dont forget this a bottom end sun CPU (UltraSparc IIi and it only runs at 650MHz). The latest Sun servers use UltraSparc IV at upto 1.2 GHz (with dual cores aswell) which would compete much better with a P4. Also Sun servers seem to scale much better as the number of CPUs increase IMO.