Okay, thanks. It's the same problem as the other person encountered. Basically, it looks to OMPI as if you are launching > 128 independent app contexts, and our arrays were limited to 128.
He has provided a patch that I'll review (couple of things I'd rather change) and then apply to our developer's trunk. I would expect it to migrate over to the 1.4 release series at some point (can't guarantee which one). On Feb 27, 2010, at 6:47 AM, Federico Golfrè Andreasi wrote: > Hi, > > the program is executed as one application on 129 cpus defined by the > hostfile. > Than rank 0, inside the code, execute another program with 129 cpus, with a > one-to-one relation, rank0 of the spawined process runs on the same host of > rank0 of the spawning one and so on... > Excuting the spawning program does not give any problem, > but in the moment of spawning (with more than 128 cpus) it holds. > > Thank you! > > Federico > > > > > 2010/2/27 Ralph Castain <r...@open-mpi.org> > Since another user was doing something that caused a similar problem, perhaps > we are missing a key piece of info here. Are you launching one app_context > across 128 nodes? Or are you launching 128 app_contexts, each on a separate > node? > > > On Feb 26, 2010, at 10:23 AM, Federico Golfrè Andreasi wrote: > >> I'm doing some tests and it seems that is not able to do a spawn multiple >> with more than 128 nodes. >> >> It just hold, with no error message. >> >> What do you think? What can I try to understand the problem. >> >> Thanks, >> >> Federico >> >> >> >> >> 2010/2/26 Ralph Castain <r...@open-mpi.org> >> No known limitations of which we are aware...the variables are all set to >> int32_t, so INT32_MAX would be the only limit I can imagine. In which case, >> you'll run out of memory long before you hit it. >> >> >> 2010/2/26 Federico Golfrè Andreasi <federico.gol...@gmail.com> >> HI ! >> >> have you ever did some analysis to understand if there is a limitation in >> the number of nodes usable with OpenMPI-v1.4 ? >> Using also the functions MPI_Comm_spawn o MPI_Comm_spawn_multiple. >> >> Thanks, >> Federico >> >> _______________________________________________ >> 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 >> >> _______________________________________________ >> 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 > > _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users
