Towards a Unified Implementation of GEMM in BLIS
Pages 111 - 121
Abstract
Matrix libraries often focus on achieving high performance for problems considered to be either "small" or "large", as these two scenarios tend to respond best to different optimization strategies. We propose a unified technique for implementing matrix operations like general matrix multiplication (gemm) that can achieve high performance for both small and large problem sizes. The key is to fuse packing - an operation that copies data to a contiguous layout in memory and which is critical for large matrix performance - with the first computational "pass" over that data. This boosts performance across the problem size spectrum. As a result, tuning general-purpose libraries becomes simpler since it obviates the need to carefully express and parameterize logic that chooses between a "small matrix" strategy and a "large matrix" strategy. A prototype implementation of the technique built with the BLAS-like Library Instantiation Software (BLIS) framework is described and performance on a range of architectures is reported.
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Index Terms
- Towards a Unified Implementation of GEMM in BLIS
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Published In
June 2023
505 pages
ISBN:9798400700569
DOI:10.1145/3577193
- Chair:
- Kyle Gallivan,
- Co-chair:
- Efstratios Gallopoulos,
- Program Co-chairs:
- Dimitrios S. Nikolopoulos,
- Ramon Beivide
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Published: 21 June 2023
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