Dynamic Voltage and Frequency Scaling in Multimedia Servers
In this paper, the authors experimentally investigate the scope and usefulness of Dynamic Voltage and Frequency Scaling (DVFS) in multimedia servers. For their experiment, they considered four scaling policies, two heterogeneous servers, and two different application scenarios. In the first scenario, they used an IO-Intensive multimedia downloading application while in the second scenario they used a predominately CPU-Intensive application, which transcodes video files. They will show that while the advantage of DVFS for IO-Intensive applications is apparent, it is not so with CPU-Intensive applications. The advantage in IO-Intensive applications depends on the selection of frequencies in the machine and the way the CPU speed scales.