Metrics, Models and Methodologies for Energy-Proportional Computing

Improving non-peak power efficiency has the potential to significantly enhance the efficiency of a data center and allows us to host more resources under a given power budget. In this paper, we use RAPL interfaces to analyze and model the performance (both throughput and response time) of SPECweb benchmark under subsystem-level power limits. We show that performance under a subsystem-level power limits can be modeled using simple and well-studied non-linear models. We then leverage a load prediction model and an optimization framework to create a runtime system for power management of enterprise application. Our work shows that effective subsystem-level power capping improves the energy proportionality of the server.