> On Apr 5, 2018, at 3:55 PM, George Bosilca <[email protected]> wrote:
>
> Noam,
>
> The OB1 provide a mechanism to dump all pending communications in a
> particular communicator. To do this I usually call mca_pml_ob1_dump(comm, 1),
> with comm being the MPI_Comm and 1 being the verbose mode. I have no idea how
> you can find the pointer to the communicator out of your code, but if you
> compile OMPI in debug mode you will see it as an argument to the
> mca_pml_ob1_send and mca_pml_ob1_recv function.
>
> This information will give us a better idea on what happened to the message,
> where is has been sent (or not), and what were the source and tag used for
> the matching.
Interesting. How would you do this in a hung program? Call it before you call
the things that you expect will hang? And any ideas how to get a communicator
pointer from fortran?
Noam
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