Use of Valgrind Tool Suite and Profile-Guided Optimization in a CFD Code

DABIN, ALEJANDRO; GARELLI, L.; M. STORTI; DORSCH, JUAN PABLO

Santa Fe

Congreso; MECOM 2018 - XII Congreso Argentino de Mecánica Computacional; 2018

Asociación Argentina de Mecánica Computacional AMCA

In this work Valgrind?s Tool Suite is used to profile memory usage (Cachegrind) and to graphfunction calls (Callgrind) when running Code_Saturne with OpenMP. The object of this analysis is todetect possible code?s bottlenecks in order to improve performance in shared memory environments.Additionally, tests were run using flat Message Passing Interface (MPI) to compare total memory usagebetween these parallelization strategies. Finally, the code is compiled using Profile-Guided Optimiza-tion (PGO) with a representative set of workloads to evaluate if this technique improves application?sperformance.