27447

Using scheduling entropy amplification in CUDA/OpenMP code to exhibit non-reproducibility issues

David Defour
LAMPS, Univ. of Perpignan, France
hal-03832904, (28 Oct 2022)

@inproceedings{defour2022using,

   title={Using scheduling entropy amplification in CUDA/OpenMP code to exhibit non-reproducibility issues},

   author={Defour, David},

   booktitle={15th IEEE International Symposium on EMbedded Multicore/Many-core Systems-on-Chip (MCSoC-2022)},

   year={2022}

}

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Rounding error or cancellation that appears with each floating-point operations, combined with the lack of control over execution order in parallel code leads to numerical issues such as numerical reproducibility. In order to enhance the possibility to discover such numerical issue, in this article we propose a simple solution base on an index interposer and an index scrambler to amplify the possible combination of execution order.
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