Yes, I know. The problem is that I need to use some special way for running my processes provided by the environment in which I'm working and unfortunately I can't use mpirun.
2010/4/18 Ralph Castain <r...@open-mpi.org>: > Guess I don't understand why you can't use mpirun - all it does is start > things, provide a means to forward io, etc. It mainly sits there quietly > without using any cpu unless required to support the job. > > Sounds like it would solve your problem. Otherwise, I know of no way to get > all these processes into comm_world. > > > On Apr 17, 2010, at 2:27 PM, Grzegorz Maj wrote: > >> Hi, >> I'd like to dynamically create a group of processes communicating via >> MPI. Those processes need to be run without mpirun and create >> intracommunicator after the startup. Any ideas how to do this >> efficiently? >> I came up with a solution in which the processes are connecting one by >> one using MPI_Comm_connect, but unfortunately all the processes that >> are already in the group need to call MPI_Comm_accept. This means that >> when the n-th process wants to connect I need to collect all the n-1 >> processes on the MPI_Comm_accept call. After I run about 40 processes >> every subsequent call takes more and more time, which I'd like to >> avoid. >> Another problem in this solution is that when I try to connect 66-th >> process the root of the existing group segfaults on MPI_Comm_accept. >> Maybe it's my bug, but it's weird as everything works fine for at most >> 65 processes. Is there any limitation I don't know about? >> My last question is about MPI_COMM_WORLD. When I run my processes >> without mpirun their MPI_COMM_WORLD is the same as MPI_COMM_SELF. Is >> there any way to change MPI_COMM_WORLD and set it to the >> intracommunicator that I've created? >> >> Thanks, >> Grzegorz Maj >> _______________________________________________ >> users mailing list >> us...@open-mpi.org >> http://www.open-mpi.org/mailman/listinfo.cgi/users > > > _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users > >
