Harvesting energy consumption on European HPC systems: Sharing Experience from the CEEC project
Kulkarni K, Kemmler S, Schwartz A, Gedik G, Chen Y, Papageorgiou D, Kavroulakis I, Iakymchuk R (2026)
Publication Language: English
Publication Type: Book chapter / Article in edited volumes
Publication year: 2026
Edited Volumes: SCA/HPCAsiaWS '26: Proceedings of the Supercomputing Asia and International Conference on High Performance Computing in Asia Pacific Region Workshops
Pages Range: 40-49
Open Access Link: https://dl.acm.org/doi/10.1145/3784828.3785161
Abstract
Energy efficiency has emerged as a central challenge for modern high-performance computing (HPC) systems, where escalating computational demands and architectural complexity have led to significant energy footprints. This paper presents the collective experience of the EuroHPC JU Center of Excellence in Exascale CFD (CEEC) in measuring, analyzing, and optimizing energy consumption across major European HPC systems. We briefly review key methodologies and tools for energy measurement as well as define metrics for reporting results. Through case studies using representative CFD applications (waLBerla, FLEXI/GALÆXI, Neko, and NekRS), we evaluate energy-to-solution and time-to-solution on diverse architectures, including CPU- and GPU-based partitions of LUMI, MareNostrum5, MeluXina, and JUWELS Booster. Our results highlight the advantages of accelerators and mixed-precision techniques for reducing energy consumption while maintaining computational accuracy. Finally, we advocate the need to facilitate energy measurements on HPC systems in order to raise awareness, teach the community, and take actions toward more sustainable exascale computing.
Authors with CRIS profile
Kajol Kulkarni
Lehrstuhl für Informatik 10 (Systemsimulation) (LSS)
Samuel Kemmler
Lehrstuhl für Informatik 10 (Systemsimulation) (LSS)
Involved external institutions
Sweden (SE)How to cite
APA:
Kulkarni, K., Kemmler, S., Schwartz, A., Gedik, G., Chen, Y., Papageorgiou, D.,... Iakymchuk, R. (2026). Harvesting energy consumption on European HPC systems: Sharing Experience from the CEEC project. In SCA/HPCAsiaWS '26: Proceedings of the Supercomputing Asia and International Conference on High Performance Computing in Asia Pacific Region Workshops. (pp. 40-49).
MLA:
Kulkarni, Kajol, et al. "Harvesting energy consumption on European HPC systems: Sharing Experience from the CEEC project." SCA/HPCAsiaWS '26: Proceedings of the Supercomputing Asia and International Conference on High Performance Computing in Asia Pacific Region Workshops. 2026. 40-49.
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