Abstract
In any modern supercomputer system, a so-called noise inevitably occurs. It can be defined as an external influence of the software and hardware environment leading to a change in the execution time or other properties of applications running on a supercomputer. Although the noise can noticeably affect the performance of HPC applications in some cases, neither the nature of its occurrence nor the degree of its influence have been investigated in detail. In this paper, we study how much a certain type of noise, caused by sharing of MPI network resources, can impact the performance of parallel programs. To do this, we conducted a series of experiments using synthetic noise on the Lomonosov-2 supercomputer to determine to what extent such noise can slow down the execution of widely used benchmarks and computing cores.
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Acknowledgments
The reported study was funded by the Russian Foundation for Basic Research (project № 21-57-12011). The research was carried out on shared HPC resources at Lomonosov Moscow State University.
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Khudoleeva, A., Stefanov, K., Voevodin, V. (2023). Evaluating the Impact of MPI Network Sharing on HPC Applications. In: Sokolinsky, L., Zymbler, M. (eds) Parallel Computational Technologies. PCT 2023. Communications in Computer and Information Science, vol 1868. Springer, Cham. https://doi.org/10.1007/978-3-031-38864-4_1
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