Dear DuMuX experts, Working with https://git.iws.uni-stuttgart.de/andrian/rate-sensitivity using direct linear solver UMFPackBackend, I observed almost a 10-fold degradation in performance of a parallel version with Open MPI as compared to a serial version!
On a 40 cores Ubuntu desktop 1 time step with 6 Newton iterations took 27 sec wall time with a serial version vs. 224 sec with a parallel version.. Your feedback is greatly appreciated. Many thanks, Nikolai
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