Re: [OMPI users] mpi_paffinity_alone and Nehalem SMT

2009-10-23 Thread Eugene Loh
Noam Bernstein wrote: Hi all - we have a new Nehalem cluster (dual quad core), and SMT is enabled in the BIOS (for now). I do want to do benchmarking on our applications, obviously, but I was also wondering what happens if I just set the number of slots to 8 in SGE, and just let things run. I

[OMPI users] mpi_paffinity_alone and Nehalem SMT

2009-10-23 Thread Noam Bernstein
Hi all - we have a new Nehalem cluster (dual quad core), and SMT is enabled in the BIOS (for now). I do want to do benchmarking on our applications, obviously, but I was also wondering what happens if I just set the number of slots to 8 in SGE, and just let things run. It particular, how will

[OMPI users] MPI-3 Fortran feedback

2009-10-23 Thread Jeff Squyres
If you're a Fortran MPI developer, I have a question for you. In the MPI-3 Forum, we're working on revamping the Fortran bindings to be "better" (for a variety of definitions of "better"). There's at least one question that we really need some feedback from the MPI Fortran developer commun

[OMPI users] How can I tell (open-)mpi about the HW topology of my system?

2009-10-23 Thread Luigi Scorzato
Hi everybody, The short question is: How can I tell (open-)mpi about the HW topology of my system? The longer form is the following, I have a cluster which is physically connected in a 3D torus topology (say 5x3x2). The nodes have names: node_000, node_001, ... node_421. I can use a rankf

[OMPI users] Fwd: installation with two different compilers

2009-10-23 Thread Francesco Pietra
I have also put the 1.3.3 version (gfortran) on the path: #For openmpi-1.2.6 Intel compiler if [ "$LD_LIBRARY_PATH" ] ; then export LD_LIBRARY_PATH="$LD_LIBRARY_PATH:/usr/local/lib" else export LD_LIBRARY_PATH="/usr/local/lib" fi #For openmpi-1.3.3 gnu (gfortran) compiled if [ "$LD_LIBRARY_