Hello Yes thanks. I can split the 64bit universe into the number of processors indeed, then generate in each process unique ids that will never conflict with ids from other processors. This will be an index into a data structure that is cloned in each processor (and maintained cloned throughout the session)
On 3 January 2014 13:36, Jeff Hammond <jeff.scie...@gmail.com> wrote: > Unique to each process? > > Try this: > > int rank; > MPI_Comm_rank(MPI_COMM_WORLD, &rank); > uint64_t unique = rank; > > To get additional unique values: > > int size; > MPI_Comm_size(MPI_COMM_WORLD, &size); > unique += size; > > If this isn't insufficient, please ask to question differently. > > There is no canonical method for this. > > Jeff > > Sent from my iPhone > > On Jan 3, 2014, at 3:50 AM, MM <finjulh...@gmail.com> wrote: > > Hello, > Is there a canonical way to obtain a globally unique 64bit unsigned > integer across all mpi processes, multiple times? > > Thanks > > MM > > _______________________________________________ > 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 >
