Newsgroups: comp.parallel.mpi
From: gropp@godzilla.mcs.anl.gov (William Gropp)
Subject: Re: Any function similar to MPI_Allreduce?
Organization: Math and Computer Science, Argonne National Laboratory
Date: Fri, 11 Aug 1995 14:06:04 GMT
Message-ID: <80814996416657@godzilla.mcs.anl.gov>

| As the subject stated, is there any function similar to MPI_Allreduce,
| except that only some of the processes will be considered?  I have tried to
| use MPI_Reduce_scatter, but failed.  Can anyone help?

Just create a communicator containing the processes that you want to consider.
MPI_Comm_split is ofen the easiest way.
Bill

