MPI-2 Process Management and mpiexec

[Trach-Minh Tran]

Dear Pete,

Thanks for your quick reply.

I don't think that I am capable of adding new features to mpiexec,
my knowledge on TM things being practically zero!

For the moment, we would rather switch to mpich2 launcher
for codes using MPI-2 dynamic process features .. while
waiting that these features will be soon incorporated into mpiexec.

Thanks again for your great work!

-Minh.


Pete Wyckoff wrote:
> trach-minh.tran at epfl.ch wrote on Fri, 16 Dec 2005 09:58 +0100:
> 
>>Is MPI-2 process management supported by mpiexec? I've
>>got the following error when using MPI_Comm_spawn
>>in a MPI program:
>>
>>mpiexec -n 1 ./masterc
>>mpiexec: Error: handle_pmi: no "cmd" key first in keyvals.
>>mpiexec: Warning: task 0 exited with status 13.
>>
>>and this error with another program using MPI_Lookup_name
>>
>>mpiexec -n 1 ./viz
>>mpiexec: Error: handle_pmi: unknown cmd lookup_name.
>>mpiexec: Warning: task 0 died with signal 15 (Terminated).
>>
>>I use torque-2.0.0p2, mpiexec 0.80 and mpich2-1.0.3. Note
>>that I have no problem with the mpich2 mpdboot/mpiexec
>>launcher.
> 
> 
> It works for the launching stage, but you are trying to do
> MPI-2 specific features that depend on the launcher that are
> not yet implemented in mpiexec.
> 
> MPI_Comm_spawn is a bit complex because mpiexec must figure
> out where to spawn the task, but that functionality happens
> to exist already due to the concurrent "-server" code.
> 
> MPI_Lookup_name might be easy, but I may have to make the
> keyval infrastructure a bit more generic.
> 
> I'll probably start fiddling with these things soon, but if
> you are eager to add the code in pmi.c to make these things
> work, you would be welcome to it.
> 
> 		-- Pete
> 

-- 
Dr. Trach-Minh Tran
CRPP/SB/EPFL http://crppwww.epfl.ch
Swiss Federal Institute of Technology
CH-1015 Lausanne
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Tel: +41 21 693 4569
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