Changing operating frequency and supply voltage dynamically according to load. Since dynamic power scales with the square of voltage, lowering voltage during light loads saves a lot of power.
Field: CPUs and architecture
Still, lowering frequency together with voltage reduces power nearly with the cube, which is why DVFS—scaling both down under light load—is the most effective power-saving technique.
In a CMOS circuit, if only the supply voltage is halved wit…DVFS lowers frequency and supply voltage under light load and raises them under heavy load.
Which technique reduces CPU power consumption by dynamicall…CMOS Amdahl's law Branch prediction Cache coherency Cache memory DMA (direct memory access) GPU Instruction set architecture (ISA) Interrupt IPC