OpenSolaris

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Bug ID 6635705
Synopsis static DTrace probe points for CPU power management state transitions
State 10-Fix Delivered (Fix available in build)
Category:Subcategory kernel:pm
Keywords tesla
Responsible Engineer Eric Saxe
Reported Against
Duplicate Of
Introduced In
Commit to Fix snv_82
Fixed In snv_82
Release Fixed solaris_nevada(snv_82) , solaris_10u6(s10u6_01) (Bug ID:2160261)
Related Bugs 6713863 , 6716290
Submit Date 29-November-2007
Last Update Date 18-March-2008
Description 
Static DTrace probes that fire when a CPU changes power states would be useful both for observability, and as an interface for observability tools (like PowerTop) that report on time spent in various CPU power states.

This RFE would implement static probes points that could fire when a CPU:

	- Changes speeds (P-state transitions, frequency scaling, etc)
	- Halts, (or undergoes C-state transitions)
Work Around 
N/A
Comments 
N/A