[mpich-discuss] How to spawn a non-MPI process with MPI_Comm_spawn

Mccall, Kurt E. (MSFC-EV41) kurt.e.mccall at nasa.gov
Tue Jan 7 10:07:32 CST 2020


Issue created.  Can you suggest any other way to launch non-MPI processes?


-----Original Message-----
From: Raffenetti, Kenneth J. <raffenet at mcs.anl.gov> 
Sent: Tuesday, January 7, 2020 9:32 AM
To: discuss at mpich.org
Cc: Mccall, Kurt E. (MSFC-EV41) <kurt.e.mccall at nasa.gov>
Subject: [EXTERNAL] Re: [mpich-discuss] How to spawn a non-MPI process with MPI_Comm_spawn

We do not support such a key at this time, but it seems reasonable to add. Could you create an issue on our GitHub? 


On 1/6/20 9:50 AM, Mccall, Kurt E. (MSFC-EV41) via discuss wrote:
> I'm attempting to use MPICH to manage a number of non-MPI processes.    
> The latter call system() and fork(), which as I understand it may  
> cause undefined behavior if they were spawned as MPI processes.   How 
> do I use
> MPI_Comm_spawn() to launch these processes?
> For example, OpenMpi has a key for the "info" field named 
> "ompi_non_mpi", which causes a non-MPI process to be spawned.   Is 
> there something similar in MPICH?
> Thanks,
> Kurt
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