Actually, what Saliya describes sounds like a bug - those procs must all be assigned to the same comm_world.
Saliya: are you sure they are not? What ranks are you seeing? > On Jul 29, 2016, at 12:12 PM, Udayanga Wickramasinghe <uswic...@umail.iu.edu> > wrote: > > Hi, > I think orte/ompi-mca foward number of environment variables (ie:- $OMPI_*) > to its ranks. So I believe you may use $OMPI_COMM_WORLD_LOCAL_RANK to > specifically filter out parameters within the script. > > Regards > Udayanga Wickramasinghe > Research Assistant > School of Informatics and Computing | CREST > Indiana University, Bloomington > > > > > > On Fri, Jul 29, 2016 at 2:50 PM, Saliya Ekanayake <esal...@gmail.com > <mailto:esal...@gmail.com>> wrote: > Hi, > > I am invoking my Java MPI program as, > > mpirun opts script.sh > > Now, I want to pass some rank specific argument to this script. For example, > I need to enable GC logs for one of the processes only, so I need to pass an > argument to the JVM if that's rank0 to do GC logs. > > I've asked the same question a while back and Ralph suggested to use > > mpirun opts -np 1 java args-for-rank0 app : -np 1 java args-for-others .. > style. > > It works for 1 node, but beyond that, there's something that goes wrong with > how processes are assigned to communicators. In the code, the comm world is > split into different communicators and this pattern breaks that logic. > > Is there an alternative approach to doing this? > > Thank you, > Saliya > > -- > Saliya Ekanayake > Ph.D. Candidate | Research Assistant > School of Informatics and Computing | Digital Science Center > Indiana University, Bloomington > > > _______________________________________________ > users mailing list > users@lists.open-mpi.org <mailto:users@lists.open-mpi.org> > https://rfd.newmexicoconsortium.org/mailman/listinfo/users > <https://rfd.newmexicoconsortium.org/mailman/listinfo/users> > > _______________________________________________ > users mailing list > users@lists.open-mpi.org > https://rfd.newmexicoconsortium.org/mailman/listinfo/users
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