[MPICH] Forking exisiting mpi processes

[Rusty Lusk]

This is likely to be a bad idea.  Just for starters, you will now  
have two different MPI processes with the same rank.  What does your  
application logic think about this?

Regards,
Rusty Lusk

On Sep 20, 2006, at 1:27 PM, James S Perrin wrote:

> Hi,
> 	I'm looking for some details of what can and can't be done if a  
> running mpi process forks.
>
> 	From a simple test program it seems, at least with MPICH, that the  
> child process inherits the mpi environment and credentials of the  
> parent and can make MPI calls as if it were the parent process. The  
> child process should simply exit on completion and only the parent  
> process should call MPI_Finalize. Child to child communication is  
> best done using a dedicated MPI_Comm, the same as working with  
> threads. However is thread support actaully required? Should  
> MPI_thread_init be called?
>
> Regards
> James
> -- 
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> James S. Perrin,                   | email:  
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