Re: [OMPI devel] clarification regarding optimization of MPI collective calls

2006-12-08 Thread Jeff Squyres
On Dec 8, 2006, at 5:41 AM, krishna chaitanya wrote: I learnt from a reliable source that MPI uses the services provided by TCP/IP or infiniband. Suppose that there is a bottle-neck in the Keep in mind that MPI is a specification -- a document. There are many software imple

Re: [OMPI devel] clarification regarding optimization of MPI collective calls

2006-12-08 Thread Christian Leber
On Fri, Dec 08, 2006 at 04:11:04PM +0530, krishna chaitanya wrote: > I learnt from a reliable source that MPI uses the services >provided by TCP/IP or infiniband. Did you hear that from a whistle-blower? > Suppose that there is a bottle-neck in > the TCP/IP layer itself, how

[OMPI devel] clarification regarding optimization of MPI collective calls

2006-12-08 Thread krishna chaitanya
Hello all, I learnt from a reliable source that MPI uses the services provided by TCP/IP or infiniband. Suppose that there is a bottle-neck in the TCP/IP layer itself, how will optimization of MPI calls really help? thanks