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FlexTiles: a globally homogeneous but locally heterogeneous manycore architecture

This paper introduces the FlexTiles platform, which consist of a manycore architecture associated with a complete tool flow. The different components of the manycore architecture are based on general purpose processors (GPP), low power DSP cores and an eFPGA on which dedicated IPs can be dynamically configured at run-time. Thus, in order to mask the underlying heterogeneity of such an architecture, innovative software mechanism and hardware interface were defined. These features enable a breakthrough in term of computing performance while improving the on-line adaptive capabilities. Given the large variety of possible use cases that these platforms must support and the resulting workload variability, offline approaches are no longer sufficient because they do not allow coping with time changing workloads. In order to facilitate the architecture adaptation under different scenarios, a programming model that considers both static and dynamic behaviors is proposed. The proposed architecture has been implemented on a FPGA platform and has shown the validity of the proposed solution.