Advanced Configuration and Power Interface Specification

Advanced Configuration and Power Interface Specification
Figure 8-47 Worst case wake latency
Note that other worst case paths could end up determining the WCWL, but what is described above
is expected to be the most common. For example, there could be another period between the OS
making the idle request and the point of no return where the platform does not check for wake up
events, and which is longer than the time taken to enter and exit the power state. In that case that
period would become the worst case wakeup latency.
Figure 8-48 Energy of states A,B and C versus sleep duration
Minimum residency (MR) is the time after which a state becomes more energy efficient than any
shallower state. This parameter answers the fundamental question: how long does the hierarchy node
448 April, 2015 Version 6.0