Abstract
High-performance computing is not only a race towards the fastest supercomputers but also the science of using such massive machines productively to acquire valuable results – outlining the importance of performance modelling and optimization. However, it appears that more than punctual optimization is required for current architectures, with users having to choose between multiple intertwined parallelism possibilities, dedicated accelerators, and I/O solutions. Witnessing this challenging context, our paper establishes an automatic feedback loop between how applications run and how they are launched, with a specific focus on I/O. One goal is to optimize how applications are launched through moldability (launch-time malleability). As a first step in this direction, we propose a new, always-on measurement infrastructure based on state-of-the-art cloud technologies adapted for HPC. In this paper, we present the measurement infrastructure and associated design choices. Moreover, we leverage an existing performance modelling tool to generate I/O performance models. We outline sample modelling capabilities, as derived from our measurement chain showing the critical importance of the measurement in future HPC systems, especially concerning resource configurations. Thanks to this precise performance model infrastructure, we can improve moldability and malleability on HPC systems.
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Acknowledgment
This work has been partially funded by the European Union’s Horizon 2020 under the ADMIRE project, grant Agreement number: 956748-ADMIRE-H2020-JTI-EuroHPC-2019-1.
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Besnard, JB. et al. (2023). Towards Smarter Schedulers: Molding Jobs into the Right Shape via Monitoring and Modeling. In: Bienz, A., Weiland, M., Baboulin, M., Kruse, C. (eds) High Performance Computing. ISC High Performance 2023. Lecture Notes in Computer Science, vol 13999. Springer, Cham. https://doi.org/10.1007/978-3-031-40843-4_6
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