The Open MPI FAQ recommends not to oversubscribe the available cores
for best performances, but is this still true? The new Nehalem
processors are built to run 2 threads on each core. On a 8 sockets
systems, that sums up to 128 threads that Intel claims can be run
without significant performance degradation. I guess the last word is
to those who have tried to run some benchmarks and applications on
the new Intel processors. Any experience to share?