Coordinating Processor and Main Memory for Server Power Capping

With the number of high-density servers in data centers rapidly increasing, power capping with performance optimization has become a key challenge to gain a high return on investment by accommodating the maximized number of servers allowed by the limited power supply and cooling facilities. Various power capping solutions have been recently proposed for high-density servers and different components in a server to avoid system failures due to power overload or overheating. Existing solutions, unfortunately, either rely only on the processor for server power capping, with the assumption that it is the only major power consumer, or limit power only for a single component, such as main memory.