Papers › Maple: A Processing Element for Row-Wise Product Based Sparse Tensor Accelerators

Maple: A Processing Element for Row-Wise Product Based Sparse Tensor Accelerators

27 Mar 2023arXiv:2303.15199links table onlyarchive 2025-07-28

Midia Reshadi, David Gregg

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Sparse tensor computing is a core computational part of numerous applications in areas such as data science, graph processing, and scientific computing. Sparse tensors offer the potential of skipping unnecessary computations caused by zero values. In this paper, we propose a new strategy for extending row-wise product sparse tensor accelerators. We propose a new processing element called Maple that uses multiple multiply-accumulate (MAC) units to exploit local clusters of non-zero values to increase parallelism and reduce data movement. Maple works on the compressed sparse row (CSR) format and calculates only non-zero elements of the input matrices based on the sparsity pattern. Furthermore, we may employ Maple as a basic building block in a variety of spatial tensor accelerators that operate based on a row-wise product approach. As a proof of concept, we utilize Maple in two reference accelerators: Extensor and Matraptor. Our experiments show that using Maple in Matraptor and Extensor achieves 50% and 60% energy benefit and 15% and 22% speedup over the baseline designs, respectively. Employing Maple also results in 5.9x and 15.5x smaller area consumption in Matraptor and Extensor compared with the baseline structures, respectively.

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