Multicore energy reduction utilizing canary FF

MultiCore Processor System-on-Chip (MPSoC) is one of the promising technique to satisfy computing demands of the future consumer devices. While MPSoC has an advantage in energy consumption in comparison with high-frequency microprocessor-based system, it is still threatened by increasing energy consumption due to process-voltage-temperature (PVT) variations. It requires large design margins in the supply voltage, resulting in large energy consumption. This paper proposes to utilize a dual-sensing flip-flop (FF), named Canary FF, in order to reduce the overestimated voltage margin. We adopt canary FF to an MPSoC based on Toshiba's MeP and estimate its energy reduction by cycle-based simulations. We find 20.5% energy reduction.