Listing nodes in mpd.hosts on SMP machine

[mfbaigzhcet_ac_in]

I am having the problem of listing nodes in mpd.hosts file on a 4 way SMP machine with each node being a quad-core processor. How should I assign diffferent programs in MPI to different nodes. Our mpd.hosts file looks like

localhost:4
localhost:4
localhost:4
localhost:4

but our machine has only one IP address i.e. we do not know how to give internal addresses to each node. Please help in this regard.

Thanks

[TimP · Accepted solution]

How about giving each job a separate list in I_MPI_PIN_PROCS ? Admittedly not entirely convenient, as you will have to look up the core numbering.