Chapter 5: Energy Efficiency Flashcards
1
Q
The three states that can be used to reduce CPU power usage are?
A
- T-state
- P-state
- C-state
2
Q
When a CPU is in T-State, what is happening?
A
It is being throttled by having STPCLK (stop clock) signals inserted.
3
Q
What happens in to a P-state CPU?
A
The clock tick rate is reduced
4
Q
Demand Based Switching allows for what?
A
Automatic switching of CPU Power Saving States based off of load.
5
Q
What happens in to a C-state CPU?
A
Allows the clock to be halted.
6
Q
When the CPU is active, it always runs at what C level?
A
C0
7
Q
What is power capping?
A
The specific lower limit setting in terms of number of watts.
8
Q
What is power savings?
A
The amount of power saved.
