H-EARtH: Heterogeneous Platform Energy Management

The Heterogeneous EARtH algorithm aim at finding the optimal platform energy point of a heterogeneous cores CPU by selecting the right core and changing the voltage and frequency of operation. The algorithm is based on a theoretical model employing a small number of parameters, which are extracted from real systems using off-line and run-time methods. The model and algorithm have been validated using a cycle accurate simulation, and on real systems using 45nm, 32nm and 22nm Intel® Core processors. The Heterogeneous EARtH algorithm can save an average of 21% energy with up to 33% savings, compared with symmetric core architecture, and up to 44% compared with the commonly used fixed frequency policies in the heterogeneous CPU.