On Tue, Oct 27, 2020, Bill Abbott wrote:
>
>I'm trying to compile a hybrid pmemd with both MPI and OpenMP and it's
>not acting the way I expect. It seems to build ok, the run_cmake step
>indicates that OpenMP is included and the pmemd.MPI binary acts exactly
>as I would expect with no OpenMP - exactly one core per rank.
What you see is correct and expected. There was some effort to use
OpenMP and MPI together on the Xeon Phi architecture, but it died when
the enthusiams for Xeon Phi did.
We should have some warning message about this. It's legal to use both
OpenMP and MPI together, but cpptraj (the analysis program) is the only
code that makes use of this, as far as I know. pmemd.MPI is not set up
for OpenMP.
Sorry for the confusion....regards....dave
[Others on the list should chime in if the above description is wrong or
incomplete.]
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Received on Tue Oct 27 2020 - 13:30:02 PDT
