Enhancing Programmability in NoC-Based Lightweight Manycore Processors with a Portable MPI Library

  • João Fellipe Uller UFSC
  • João Vicente Souto UFSC
  • Pedro Henrique Penna PUC Minas / Université Grenoble Alpes
  • Márcio Castro UFSC
  • Henrique Freitas PUC Minas
  • Jean-François Méhaut Université Grenoble Alpes


The performance and energy efficiency provided by lightweight manycores is undeniable. However, the lack of rich and portable support for these processors makes software development challenging. To address this problem, we propose a portable and lightweight MPI library (LWMPI) designed from scratch to cope with restrictions and intricacies of lightweight manycores. We integrated LWMPI into a distributed OS that targets these processors and evaluated it on the Kalray MPPA-256 processor. Results obtained with three applications from a representative benchmark suite unveiled that LWMPI achieves similar performance scalability in comparison with the low-level vendor-specific API narrowed for MPPA-256, while exposing a richer programming interface.


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ULLER, João Fellipe; SOUTO, João Vicente; PENNA, Pedro Henrique; CASTRO, Márcio; FREITAS, Henrique; MÉHAUT, Jean-François. Enhancing Programmability in NoC-Based Lightweight Manycore Processors with a Portable MPI Library. In: SIMPÓSIO EM SISTEMAS COMPUTACIONAIS DE ALTO DESEMPENHO (WSCAD), 21. , 2020, Evento Online. Anais [...]. Porto Alegre: Sociedade Brasileira de Computação, 2020 . p. 155-166. DOI: https://doi.org/10.5753/wscad.2020.14066.