On Thu, Jul 30, 2009 at 10:08 AM, George Bosilca<bosi...@eecs.utk.edu> wrote: > The leave pinned will not help in this context. It can only help for devices > capable of real RMA operations and that require pinned memory, which > unfortunately is not the case for TCP. What is [really] strange about your > results is that you get a 4 times better bandwidth over TCP than over shared > memory. Over TCP there are 2 extra memory copies (compared with sm) plus a > bunch of syscalls, so there is absolutely no reason to get better > performance. > > The Open MPI version is something you compiled or it came installed with the > OS? If you compiled it can you please provide us the configure line?
OpenMPI was compiled from source v1.3 with only a --prefix line, no other options.
