http://defect.opensolaris.org/bz/show_bug.cgi?id=4386





--- Comment #2 from Aubrey.Li <aubrey.li at intel.com>  2008-11-23 05:57:14 ---
Hi Eric,

Yes, I'm suggesting that P-state selection policy should use all the
frequencies.
Currently, the policy knows if the system is busy or not and selects the lowest
and the highest frequencies. This policy eats more power if the system is just
a bit busy(highest frequency transition due to workload from 0% to 10%) and
perform relative bad performance if the system is relative busy(lowest
frequency 
transition due to workload from 100% to 60%). It'd better the policy know how
busy the system is so that to choose the different frequencies. I believe using 
the mid-range frequencies as well could make the better perf/power tradeoff and 
get the better score of some power related benchmarks like SPECpower.

What do you think?

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