Orland, F. (Corresponding author) ; Jenke, J. ; Liem, R.

2025
Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag Jülich

Abstract: This contribution highlights correctness and performance analysis results for an open-source CFD application. During the performance analysis of the code, we observed unexpected non-deterministic behavior in the application. Data race analysis with ThreadSanitizer, available in GNU and LLVM compilers, in combination with our extension for OpenMP-aware data race analysis, identified the root cause of the non-deterministic behavior. We will look into the analysis setup and the reports from the tool. Furthermore, we will discuss insights about the performance and I/O behavior of the code collected with the Scalasca tool-suite & Darshan and highlight performance optimizations.