[Mpi-22] Another MPI-2.2 attribute ambiguity?

Jeff Squyres jsquyres at [hidden]
Thu Apr 16 09:34:34 CDT 2009

On Apr 16, 2009, at 10:29 AM, Solt, David George wrote:

> HP-MPI does #2.
> What if the address of the variable originally passed in is no  
> longer in scope when the corresponding comm_get_attr call is made?

Ya, that can be a problem.

Do you have an internal copy of the Intel MPI tests?  What does  
MPI_KEYVAL1_F do?  Ours checks that the value of a global variable has  
been changed by the callbacks.

I think that's why we coded it up in Open MPI this way, but I'm not  
sure (that was a long time ago).

Jeff Squyres
Cisco Systems

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