Static scheduling of a time-triggered network-on-chip based on SMT solving

  • Authors:
  • Jia Huang;Jan Olaf Blech;Andreas Raabe;Christian Buckl;Alois Knoll

  • Affiliations:
  • ForTISS GmbH, Munich, Germany;ForTISS GmbH, Munich, Germany;ForTISS GmbH, Munich, Germany;ForTISS GmbH, Munich, Germany;Technische Universität München, Garching, Germany

  • Venue:
  • DATE '12 Proceedings of the Conference on Design, Automation and Test in Europe
  • Year:
  • 2012

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Abstract

Time-Triggered Network-on-Chip (TTNoC) is a networking concept aiming at providing both predictable and high-throughput communication for modern multiprocessor systems. The message scheduling is one of the major design challenges in TTNoC-based systems. The designers not only need to allocate time slots but also have to assign communication routes for all messages. This paper tackles the TTNoC scheduling problem and presents an approach based on Satisfiability Modulo Theories (SMT) solving. We first formulate the complete problem as an SMT instance, which can always compute a feasible solution if exists. Thereafter, we propose an incremental approach that integrates SMT solving into classical heuristic algorithms. The experimental results show that the heuristic scales significantly better with only minor loss of performance.