Hmmm...I don't see anything immediately glaring. What do you mean by "doesn't work"? Is there some specific behavior you see?
You might try the attached program. It's a simple spawn test we use - 1.7.4 seems happy with it.
simple_spawn.c
Description: Binary data
On Feb 20, 2014, at 10:14 AM, Suraj Prabhakaran <suraj.prabhaka...@gmail.com> wrote: > I am using 1.7.4! > > On Feb 20, 2014, at 7:00 PM, Ralph Castain wrote: > >> What OMPI version are you using? >> >> On Feb 20, 2014, at 7:56 AM, Suraj Prabhakaran <suraj.prabhaka...@gmail.com> >> wrote: >> >>> Hello! >>> >>> I am having problem using MPI_Comm_spawn under torque. It doesn't work when >>> spawning more than 12 processes on various nodes. To be more precise, >>> "sometimes" it works, and "sometimes" it doesn't! >>> >>> Here is my case. I obtain 5 nodes, 3 cores per node and my $PBS_NODEFILE >>> looks like below. >>> >>> node1 >>> node1 >>> node1 >>> node2 >>> node2 >>> node2 >>> node3 >>> node3 >>> node3 >>> node4 >>> node4 >>> node4 >>> node5 >>> node5 >>> node5 >>> >>> I started a hello program (which just spawns itself and of course, the >>> children don't spawn), with >>> >>> mpiexec -np 3 ./hello >>> >>> Spawning 3 more processes (on node 2) - works! >>> spawning 6 more processes (node 2 and 3) - works! >>> spawning 9 processes (node 2,3,4) - "sometimes" OK, "sometimes" not! >>> spawning 12 processes (node 2,3,4,5) - "mostly" not! >>> >>> I ideally want to spawn about 32 processes with large number of nodes, but >>> this is at the moment impossible. I have attached my hello program to this >>> email. >>> >>> I will be happy to provide any more info or verbose outputs if you could >>> please tell me what exactly you would like to see. >>> >>> Best, >>> Suraj >>> >>> <hello.c>_______________________________________________ >>> devel mailing list >>> de...@open-mpi.org >>> http://www.open-mpi.org/mailman/listinfo.cgi/devel >> >> _______________________________________________ >> devel mailing list >> de...@open-mpi.org >> http://www.open-mpi.org/mailman/listinfo.cgi/devel > > _______________________________________________ > devel mailing list > de...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/devel
