[Beowulf] Really efficient MPIs??

[Patrick Geoffray]

amjad ali wrote:
> Which Implementations of MPI (no matter commercial or free), make automatic
> and efficient use of shared memory for message passing within a node. (means
> which MPI librarries auomatically communicate over shared memory instead of
> interconnect on the same node).

All of them. Pretty much the same way, with some different trade-offs 
(space, perf, overhead).

Patrick