Re: [OMPI users] How to start MPI_Spawn child processes early?

2010-01-27 Thread Terry Frankcombe
My question is why? If you are willing to reserve a chunk of your machine for yet-to-exist tasks, why not just create them all at mpirun time and slice and dice your communicators as appropriate? On Thu, 2010-01-28 at 09:24 +1100, Jaison Paul wrote: > Hi, I am just reposting my early query once

Re: [OMPI users] How to start MPI_Spawn child processes early?

2010-01-27 Thread Douglas Guptill
It sounds to me a bit like asking to be born before your mother. Unless I misunderstand the question... Douglas. On Thu, Jan 28, 2010 at 09:24:29AM +1100, Jaison Paul wrote: > Hi, I am just reposting my early query once again. If anyone one can > give some hint, that would be great. > >

Re: [OMPI users] How to start MPI_Spawn child processes early?

2010-01-27 Thread Richard Treumann
, NY 12601 Tele (845) 433-7846 Fax (845) 433-8363 users-boun...@open-mpi.org wrote on 01/27/2010 06:07:43 PM: > [image removed] > > Re: [OMPI users] How to start MPI_Spawn child processes early? > > Ralph Castain > > to: > > Open MPI Users > > 01/27/2010

Re: [OMPI users] How to start MPI_Spawn child processes early?

2010-01-27 Thread Ralph Castain
I can't imagine how you would do that - only thing I can think of would be to start your "child" processes as one job, then start your "parent" processes and have them do an MPI_Comm_join with the child job. That said, I can't imagine that comm_spawn is -that- slow to make much difference to

Re: [OMPI users] How to start MPI_Spawn child processes early?

2010-01-27 Thread Jaison Paul
Hi, I am just reposting my early query once again. If anyone one can give some hint, that would be great. Thanks, Jaison ANU Jaison Paul wrote: Hi All, I am trying to use MPI for scientific High Performance (hpc) applications. I use MPI_Spawn to create child processes. Is there a way to