Thank you, that's good to know. Yes, testing this now. I'll let you know
On Fri, Jul 29, 2016 at 3:33 PM, Ralph Castain <r...@open-mpi.org> wrote: > FWIW: I just tested it on master, and all the procs are in the same > comm_world. However, that was with a C application, not Java. > > Saliya: can you please check to see if Java is behaving differently? A > simple app that gets and prints out its rank is all that is required. > > > On Jul 29, 2016, at 12:18 PM, Ralph Castain <r...@open-mpi.org> wrote: > > 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> > 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 >> https://rfd.newmexicoconsortium.org/mailman/listinfo/users >> > > _______________________________________________ > users mailing list > users@lists.open-mpi.org > https://rfd.newmexicoconsortium.org/mailman/listinfo/users > > > > > _______________________________________________ > users mailing list > users@lists.open-mpi.org > https://rfd.newmexicoconsortium.org/mailman/listinfo/users > -- Saliya Ekanayake Ph.D. Candidate | Research Assistant School of Informatics and Computing | Digital Science Center Indiana University, Bloomington
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