http://defect.opensolaris.org/bz/show_bug.cgi?id=5444





--- Comment #2 from Aubrey.Li <aubrey.li at intel.com>  2008-12-15 21:17:27 ---
Created an attachment (id=1173)
 --> (http://defect.opensolaris.org/bz/attachment.cgi?id=1173)
choose next idle type according to the cpu utilization

this patch maintains a cstate history log, and choose the next idle type
according to the cpu utilization, and prevent cpu from entering deeep cstate
when under a heavy workload. 

SPECpower result shows more 2W~ power saving in idle and 5% peak throughput
improvement.

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