I was asked by a user if the MPI allreduce recognizes when process ids are situated on the same node so that the communication can then proceed over shared memory rather over the slower networking communication channels.
Would anyone of the openmpi developers be able to comment on that question and situation on that in openmpi? Lydia ------------------------------------------ Dr E L Heck University of Durham Institute for Computational Cosmology Ogden Centre Department of Physics South Road DURHAM, DH1 3LE United Kingdom e-mail: lydia.h...@durham.ac.uk Tel.: + 44 191 - 334 3628 Fax.: + 44 191 - 334 3645 ___________________________________________
