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Dear PETSc developers,</div>
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I installed OpenMPI3 first and then installed PETSc with that mpi. Currently, I'm facing a scalability issue, in detail, I tested that using OpenMPI to calculate an addition of two distributed arrays and I get a good scalability. The problem is when I calculate
the addition of two vectors in PETSc, I don't have any scalability. For the same size of the problem, PETSc costs a lot much time than merely using OpenMPI. </div>
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My PETSc version is 3.16.0 and the version of OpenMPI is 3.1.4. Hope you can give me some suggestions.</div>
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Best Regards,
<div>Yujie</div>
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