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Analysis of Factors Affecting Power Consumption and Energy Efficiency of SGEMM on the Low-Power Myriad-2 VPU

In mobile and edge devices, reducing energy consumption and achieving high energy efficiency is the most critical system design aspect. For matrix multiplication, one of the widely used workloads, achieving this goal requires high resource utilization since dynamic power only represent a fraction of the total power. Generally, there is a trade-off between minimizing execution time and minimizing energy consumption for the workload, e.g. [1]–[3] We present a study of the effect on 1) power consumption on the Myriad-2 Vision Processing Unit (VPU) due to matrix initialization for single-precision matrix multiplication, SGEMM, and 2) energy efficiency of clock gating of processing cores.