TAEM 2.0: A Faster Transfer-Aware Effective Loop Mapping for Heterogeneous Resources on CGRA

Coarse-grained reconfigurable architectures (CGRAs) are energy-efficient and processing-flexible platforms to perform parallel computation. CGRAs combine the advantages of flexibility of general-purpose processors (GPPs) and energy efficiency of application-specific integrated circuits (ASICs). During the compilation process, the CGRA compiler needs to convert the high-level language codes into a data flow graph, and then map it onto CGRA to generate instruction flow and configuration context. The instruction mapping schemes of the CGRA compiler have a great impact on the efficiency and energy consumption of CGRAs. Furthermore, the quality of the instruction mapping schemes of the CGRA compiler highly depends on how the compiler maps data dependencies using different CGRA resources. This article proposes an enhanced transfer-aware loop mapping method, TAEM 2.0, based on state-of-the-art TAEM algorithm. Based on a parallel iterative IBBMCX algorithm and comprehensive CGRA resources analysis strategy, this method efficiently processes the complex situations of utilizing all those heterogeneous resources on CGRA and significantly accelerates the compilation process. Experimental results show TAEM 2.0 can accelerate the compilation process by $4.40\times $ while generating the same or better mapping results on CGRA, when compared to the state-of-art mapping technique.