Operating Systems and Architectural Techniques for
Power and Energy Conservation

Department of Computer Science
Rutgers University

Project Information

Power and Energy Conservation for Servers

The power and energy requirements of server systems play an important role in determining both the installation and operational costs of data centers. In fact, data from several sources show that power and energy costs represent a significant fraction of the cost of data centers. For example, APC estimates that power equipment, cooling equipment, and electricity together are responsible for 63% of the total cost of ownership of the physical IT infrastructure of a data center. Perhaps more importantly however, power and energy management can help protect the environment, since most power-generation technologies (such as coal-based generation) have a negative impact on the environment.

Based on these observations, we have been working on operating systems and architectural techniques to limit power consumption and conserve energy within and across data centers.

Measurement and Analysis of Power and Energy

A complete and meaningful evaluation of power and energy conservation techniques depends on modeling and measuring the impact of these techniques in terms of power, energy, and performance. Modeling allows us to predict trends and extrapolate from actual measurements. Experimental measurements not only validate and provide paramaters to our models, but also allow us to understand the impact of technological trends and different harwdware and software configurations.

Based on these observations, we have been working on modeling the power and energy behavior of different computer systems (and their workloads), ranging from laptops to server clusters.