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From: Barry Smith
Subject: Re: [petsc-users] Parallel processes run significantly slower
To: Steffen Wilksen | Universitaet Bremen
Cc: PETSc users list
Take a look at the discussion
in https://petsc.gitlab.io/-/petsc/-/jobs/5814862879/artifacts/public/html/manual
] Parallel processes run significantly slower
To: Steffen Wilksen | Universitaet Bremen
Cc: Barry Smith , PETSc users list
Hi, Steffen, Would it be an MPI process binding
issue? Could you try running with
mpiexec --bind-to core -n N python parallel_example.py
Hi all,
I'm trying to do repeated matrix-vector-multiplication of large sparse
matrices in python using petsc4py. Even the most simple method of
parallelization, dividing up the calculation to run on multiple
processes indenpendtly, does not seem to give a singnificant speed up
for large
