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- W4316252433 abstract "Large-scale 3D convolutions computed using parallel Fast Fourier Transforms (FFTs) demand multiple all-to-all communication steps, which cause bottlenecks on computing clusters. Since data transfer speeds to/from memory have not increased proportionally to computational capacity (in terms of FLOPs), 3D FFTs become bounded by communication and are difficult to scale, especially on modern heterogeneous computing platforms consisting of accelerators like GPUs. Existing HPC frameworks focus on optimizing the isolated FFT algorithm or communication patterns, but still require multiple all-to-all communication steps during convolution. In this work, we present a strategy for scalable convolution such that it avoids multiple all-to-all exchanges, and also optimizes necessary communication. We provide proof-of-concept results under assumptions of a use case, the MASSIF Hooke’s law simulation convolution kernel. Our method localizes computation by exploiting properties of the data, and approximates the convolution result by data compression, resulting in increased scalability of 3D convolution. Our preliminary results show scalability of 8 times more than traditional methods in the same compute resources without adversely affecting result accuracy. Our method can be adapted for first-principle scientific simulations and leverages cross-disciplinary knowledge of the application, the data and computing to perform large-scale convolution while avoiding communication bottlenecks. In order to make our approach widely usable and adaptable for emerging challenges, we discuss the use of FFTX, a novel framework which can be used for platform-agnostic specification and optimization for algorithmic approaches similar to ours." @default.
- W4316252433 created "2023-01-15" @default.
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- W4316252433 date "2022-08-29" @default.
- W4316252433 modified "2023-10-06" @default.
- W4316252433 title "A framework for low communication approaches for large scale 3D convolution" @default.
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- W4316252433 doi "https://doi.org/10.1145/3547276.3548626" @default.
- W4316252433 hasPublicationYear "2022" @default.
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