Efficiency modeling and exploration of 64-bit ARM compute nodes for exascale

This paper investigates the use of 64-bit ARM cores to improve the processing efficiency of upcoming HPC systems. It describes a set of available tools, models and platforms, and their combination in an efficient methodology for the design space exploration of large manycore computing clusters. Experimentations and results using representative benchmarks allow to set an exploration approach to evaluate essential design options at micro-architectural level while scaling with a large number of cores. We then apply this methodology to examine the validity of SoC partitioning as an alternative to using large SoC designs based on coherent multi-SoC models and the proposed SoC Coherent Interconnect (SCI).