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Co-Exploration of NLA Kernels and Specification of Compute Elements in Distributed Memory CGRAs

Mahadurkar, Mahesh and Merchant, Farhad and Maity, Arka and Vatwani, Kapil and Munje, Ishan and Gopalan, Nandhini and Nandy, SK and Narayan, Ranjani (2014) Co-Exploration of NLA Kernels and Specification of Compute Elements in Distributed Memory CGRAs. In: International Conference on Embedded Computer Systems - Architectures, Modeling, and Simulation (SAMOS), JUL 14-17, 2014, Samos, GREECE, pp. 225-232.

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Coarse Grained Reconfigurable Architectures (CGRA) are emerging as embedded application processing units in computing platforms for Exascale computing. Such CGRAs are distributed memory multi- core compute elements on a chip that communicate over a Network-on-chip (NoC). Numerical Linear Algebra (NLA) kernels are key to several high performance computing applications. In this paper we propose a systematic methodology to obtain the specification of Compute Elements (CE) for such CGRAs. We analyze block Matrix Multiplication and block LU Decomposition algorithms in the context of a CGRA, and obtain theoretical bounds on communication requirements, and memory sizes for a CE. Support for high performance custom computations common to NLA kernels are met through custom function units (CFUs) in the CEs. We present results to justify the merits of such CFUs.

Item Type: Conference Proceedings
Publisher: IEEE
Additional Information: Copy right for this article belongs to the IEEE, 345 E 47TH ST, NEW YORK, NY 10017 USA
Keywords: CGRA; numerical linear algebra; computation; parallelism
Department/Centre: Division of Interdisciplinary Sciences > Supercomputer Education & Research Centre
Date Deposited: 09 Oct 2015 05:57
Last Modified: 09 Oct 2015 05:57
URI: http://eprints.iisc.ac.in/id/eprint/52531

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