A stream buffer mechanism for pervasive splitting transformations on polyhedral process networks

In modern MPSoC architectures, programming to effectively exploit all the available resources becomes very challenging. Polyhedral Process Networks (PPN) are a known model of computation that represents a suitable solution for system- Atic mapping of parallel applications onto multiprocessor ar- chitectures. In previous works it has been shown that a given PPN program specification can be further analyzed and op- Timized, in order to meet the desired performance require- ments. In this paper we present an online process splitting transformation that does not need a re-design of the com- munication patterns in network structure of the application. The novelty of our approach is that, differently from other compile- Time approaches, the proposed transformation tech- nique can be applied at run- Time and followed, if needed, by the backward transformation. Using a FPGA-based MPSoC shared memory platform, we present an evaluation of the achievable performance improvements. We also discuss the overhead caused by the introduction of the run- Time trans- formation support.