Using Recursion to Boost ATLAS’s Performance

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We investigate the performance benefits of a novel recursive formulation of Strassen’s algorithm over highly tuned matrix-multiply (MM) routines, such as the widely used ATLAS for high-performance systems.

We combine Strassen’s recursion with high-tuned version of ATLAS MM and we present a family of recursive algorithms achieving up to 15% speed-up over ATLAS alone. We show experimental results for 7 different systems.