Cool and Save: Cooling Aware Dynamic Workload Scheduling in Multi-Socket CPU Systems

Traditionally CPU workload scheduling and fan control in multi-socket systems have been designed separately leading to less efficient solutions. In this paper the authors present Cool and Save, a cooling aware dynamic workload management strategy that is significantly more energy efficient than state-of-the art solutions in multi-socket CPU systems because it performs workload scheduling in tandem with controlling socket fan speeds. The experimental results indicate that applying the scheme gives average fan energy savings of 73% concurrently with reducing the maximum fan speed by 53%, thus leading to lower vibrations and noise levels.