Conference paper Open Access

Applying StarPU runtime system to scientific applications: Experiences and lessons learned

Georgios Tzanos; Vineet Soni; Charles Prouveur; Matthieu Haefele; Stavroula Zouzoula; Lazaros Papadopoulos; Samuel Thibault; Nicolas Vandenbergen; Dirk Pleiter; Dimitrios Soudris

Task-based runtime systems are adopted by application developers for their valuable features including flexibility of execution and optimized resource management. However, the use of such advanced programming models in complex HPC applications often requires significant training time and programming effort. In this work, we share experiences and lessons learned from the use of StarPU in three independent projects of various complexity. We reach conclusions, with respect to training, programming effort, and existing challenges, that are useful to the communities of application developers, as well as to the developers of runtime systems. Finally, we suggest extensions to the runtime systems beneficial to application developers.

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