Presumably yes if two or more processes are on the same node.
>What do these tests have in common?
>
>
They all try to start. :^) The problem is in MPI_Init.
>It almost looks like the problem is more likely to occur if MPI_UB or
>MPI_LB is involved or am I just imagining things?
>
>
I don't know that the statistics here are meaningful.
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