Performance Comparison of Processor for Energy Efficiency

Embedded microprocessor systems are used every day by millions of people, but these systems are not seen because (as the name implies) they are buried inside the product or the equipment. They are incorporated into products such as cars, fridges, ovens, traffic lights, industrial equipment, and so on. It was reported that as far back as 1997, close to 2 billion chips were used in numerous embedded systems applications. Embedded processors were expected to grow worldwide by 11 per cent back in 2020. These embedded processors consume more power than their earlier generations. Focus of this project is to investigate the dynamic power consumption when the processor is running. Two processors are chosen for experiment. The Very Simple Central Processing Unit (VSCPU) has only four instructions whereas the Relatively Simple Central Processing Unit (RSCPU) has sixteen instructions. As such, VSCPU is expected to consume less power. However, for a particular task, the code written for VSCPU is expected to be larger than that of RSCPU. So, the execution time for VSCPU is expected to be longer as well. In this paper, both CPU design is presented and simulation with floating point operations to estimate its power and energy consumption is discussed. The power consumption figures of a Mod 6 counter is presented, as an example. Eventually, the same will be extended to the CPUs and will be compared. This work will demonstrate the effect of instruction-set size on dynamic power and energy consumption of processors