Perfect Strong Scaling Using No Additional Energy

TitlePerfect Strong Scaling Using No Additional Energy
Publication TypeConference Paper
Year of Publication2013
AuthorsDemmel, J., Gearhart A., Lipshitz B., & Schwartz O.
Conference Name27th IEEE International Parallel & Distributed Processing Symposium 2013
Conference LocationHyatt Regency Cambridge Boston, Massachusetts USA
Abstract

Energy efficiency of computing devices has become a dominant area of research interest in recent years. Most
previous work has focused on architectural techniques to improve power and energy efficiency; only a few consider
saving energy at the algorithmic level. We prove that a region of perfect strong scaling in energy exists for matrix
multiplication (classical and Strassen) and the direct n-body problem via the use of algorithms that use all available
memory to replicate data. This means that we can increase the number of processors by some factor and decrease
the runtime (both computation and communication) by the same factor, without changing the total energy use.