Power Management in Embedded Systems - DAIICT Intranet

Congruence Class
● No device driver has the global view of the system or the power
management strategy required to completely specify the operating point.
This information is centralized in the DPM policy structure as a
congruence class of operating points.
● Any of the operating points in a class would be acceptable as an operating
point for the system in the given operating state, although device constraints
might render some members of the class invalid, and power considerations
might cause one operating point to be preferred over other valid operating
points in the class. At any given point in time a valid DPM policy will
designate one member of each congruence class as the selected operating
point for that class.