On Thu, Jan 12, 2012 at 16:10, Jeff Squyres <jsquy...@cisco.com> wrote: > It's very strange to me that Open MPI is getting *better* than raw TCP > performance. I don't have an immediate explanation for that -- if you're > using the TCP BTL, then OMPI should be using TCP sockets, just like netpipe > and the others.
Could it be that the difference is not in the transfer but in the timing ? Cheers, Bogdan