Hi,

I'm now debugging my MPI programs.
The program crashes when a certain PML or BTLs are used (I guess).

For example,
$ mpiexec ./prog    # works
$ mpiexec --mca btl openib ./prog   # works
$ mpiexec --mca btl openib,vader,self ./prog   # crash
$ mpiexec --mca pml ucx ./prog  # works

So, I would like to know if there is a way to show which PML/BTL components
are ACTUALLY used at runtime.

Of course, I can test these components one by one manually,
it would be direct and efficient if Open MPI does it.

Thanks!
Keisuke

-- 
FUKUDA, Keisuke <福田圭祐>
Tokyo, Japan
Email: keisukefuk...@gmail.com
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