Crank it up or dial it down
Augusto J. Vega, Alper Buyuktosunoglu, Heather L. Hanson, Pradip Kumar Bose, Srinivasan Ramani · 2013
Dynamic power management features are now an integral part of processor chip and system design. Dynamic voltage and frequency scaling (DVFS), core folding and per-core power gating (PCPG) are power control actuators (or "knobs") that are available in modern multi-core systems. However, figuring out the actuation protocol for such knobs in order to achieve maximum efficiency has so far remained an open research problem. In the context of specific system utilization dynamics, the desirable order of applying these knobs is not easy to determine.