1. Multi-core CPU Power Control
Yefu Wang and Kai Ma

2. Project Goals and Assumptions
Control power consumption of multi-core CPU by CPU frequency scaling
Assumptions:
Each core can be
scaled individually
Each core has a different
frequency-power curve

3. System Design Controller Power sensor Temperature sensors Frequency
Power set point
Controller
Per-core
Temperature
CPU Power
Power
sensor
Temperature
sensors
Frequency
modulator
CPU
Per-core frequency level

4. Comparison to Related Works
Server level power control
Single CPU
Treating multi-core CPU as single core CPU:
Power can be controlled
Suboptimal solution
Cluster level power control
Control total power consumption of a cluster
Treating multi-core CPU as a cluster:
Difference: Control overhead and temperature consideration
Datacenter level power control

5. Challenges and Plan Test bed Controller Plan Real system experiment
Simulation
Controller
Low overhead
Per-core Temperature Consideration
Plan
Midterm: system modeling, controller design, initial results
Final: Experiments in both real system and simulation environment, final report