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Trilinos, Tpetra, Kokkos and OpenMP #12508

Open dridzal opened 1 year ago

dridzal commented 1 year ago

Question

Are there examples of Trilinos configure options, and RHEL environment options, for the Tpetra/Kokkos linear algebra stack on a single MPI rank with OpenMP? The CPU is dual socket Intel Xeon. @trilinos/tpetra @trilinos/kokkos @trilinos/framework @trilinos/kokkos-kernels

jhux2 commented 1 year ago

@dridzal Have you tried -DTrilinos_ENABLE_OpenMP:BOOL=ON?

[EDIT]

You may also want Tpetra_INST_OPENMP:BOOL=ON.

dridzal commented 1 year ago

@jhux2 I haven't tried anything yet, I'm just getting started. I can try the options you mentioned. Will it grab all threads by default, or do I have to set some Kokkos env variables?

jhux2 commented 1 year ago

@dridzal That I don't know.

csiefer2 commented 1 year ago

@jhux2 Trilinos_ENABLE_OpenMP=ON by itself will have Tpetra build with OpenMP as its only Node type

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