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- W3204728131 abstract "Out-of-core processing aims to handle large amount of data when the memory is limited. There exists several out-of-core applications including disk-memory and CPU-GPU processing. Ideally, these out-of-core applications can be expected to be close to the peak performance of the in-core computations, if the data movement between different memory hierarchies can be overlapped by the in-core computations effectively. However, with the emergence of matrix accelerators such as TensorCore GPU, the imbalance between the speed of computations and data movement is further exacerbated, such that even high computation intensity kernels can be dominated by data movement cost. In such cases, the algorithms need to be redesigned to reduce communication volume and overlap the data movement by pipelines. In this paper, we select classic Gram-Schmidt QR factorization as an example to illustrate our recursive strategy, which shows smaller amount of data movement and higher overlapping ratio than the conventional blocking QR factorization algorithm. The results suggest this technique can potentially be applied to broader matrix computations kernels." @default.
- W3204728131 created "2021-10-11" @default.
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- W3204728131 date "2021-08-09" @default.
- W3204728131 modified "2023-09-26" @default.
- W3204728131 title "Recursion Brings Speedup to Out-of-Core TensorCore-based Linear Algebra Algorithms: A Case Study of Classic Gram-Schmidt QR Factorization" @default.
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- W3204728131 doi "https://doi.org/10.1145/3472456.3473522" @default.
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