On Sep 6, 2011, at 1:24 PM, Bhargava Ramu Kavati wrote: > As per our last discussion, MPI_INIT(..) uses TCP socket to exchange its > service-id/lid with other MPI processes. I assume this applies irrespective > of underlying library used to establish connection i.e libibcm or librdmacm. > Please correct me if I am wrong.
It can use librdmacm, but it doesn't have to (and doesn't by default). librdmacm uses its own internal communications -- I'm not sure what transport layer it uses. By default, however, OMPI uses a TCP-based connection mechanism. -- Jeff Squyres jsquy...@cisco.com For corporate legal information go to: http://www.cisco.com/web/about/doing_business/legal/cri/
