I installed Spack package of Dealii on a machine with 32 cores (48 virtual cores) and ran a petsc-parallel code. If I run using only one MPI process, then I only get one core running for the solver part. Shouldn't it use all the available cores within a node? I think its installed with MPI only support, right? Can I use hybrid MPI-OPENMPI parallelization with PetSc installed using Spack?
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