Repository logo

Browsing by Author "Ribot, Yilian"

Now showing 1 - 2 of 2
  • Design and implementation of an FPGA-based NoC for Real Time Systems
    Publication . Ribot, Yilian; Nelissen, Geoffrey
    In order to communicate, cores of a multi-core platform traditionally relied on shared busses. However, with the increasing number of computation nodes integrated in multi- and many-core platforms, Network-on-Chips (NoCs) emerged as a new alternative communication medium in Systems-on-Chips (SoCs). Hoplite-RT is a new NoC design that was recently proposed. Hoplite-RT is a compact design easy to analyze and with a low-cost implementation that was specifically tailored for FPGA. In this work, we introduce priority-based routing to Hoplite-RT and change the network topology so as to improve its timing behavior, i.e., its Worst-Case Traversal Time (WCTT).
    2019Conference object Open access Show more
  • nDimNoC: Real-Time D-dimensional NoC
    Publication . Ribot, Yilian; Nelissen, Geoffrey; Tovar, Eduardo
    The growing demand of powerful embedded systems to perform advanced functionalities led to a large increase in the number of computation nodes integrated in Systems-on-chip (SoC). In this context, network-on-chips (NoCs) emerged as a new standard communication infrastructure for multi-processor SoCs (MPSoCs). In this work, we present nDimNoC, a new D-dimensional NoC that provides real-time guarantees for systems implemented upon MPSoCs. Specifically, (1) we propose a new router architecture and a new deflection-based routing policy that use the properties of circulant topologies to ensure bounded worst-case communication delays, and (2) we develop a generic worst-case communication time (WCCT) analysis for packets transmitted over nDimNoC. In our experiments, we show that the WCCT of packets decreases when we increase the dimensionality of the NoC using nDimNoC 19s topolgy and routing policy. By implementing nDimNoC in Verilog and synthesizing it for an FPGA platform, we show that a 3D-nDimNoC requires "485-times less silicon than routers that use virtual channels (VC). We computed the maximum operating frequency of a 3D-nDimNoC with Xilinx Vivado. Increasing the number dimensions in the NoC improves WCCT at the cost of a more complex routing logic that may result in a reduced operating clock frequency.
    2021-07-05Conference object Open access Show more