Fine-Grained CPU Power Management Based on Digital Frequency Divider

Dynamic voltage and frequency scaling (DVFS) is a widely used method to improve the energy efficiency of CPU. Reducing during memory-intensive workloads can minimize power consumption without affecting performance, thereby improving overall efficiency. A finer-grained DVFS strategy leads better However, due limitation regulators, implementation granularity current strategies 100 μs or more. This paper proposes that managing CPU’s through more fine-grained load-aware approach CPU efficiency, even with limitations regulators. adds dynamic divider system. mechanism processor’s in scenarios where does not take effect. also management based on sampling. In order accuracy performance estimation, we enhanced state-of-the-art CRIT complete accurate memory time estimation shorter interval. The was verified ChampSim McPAT simulating platforms. SPEC 2017 benchmark, this work saves an average 16.36% improves by 13.57%. Compared 9.77% 6.79%, improved 6.20% 6.35%, respectively. brings 2.04% reduction, only 0.16% drop compared CRIT.