Thanks to everyone who answered, in particular Ake Sandgren, it appears
to be a weird problem with acml that somehow triggers a seg fault in
libmpi, but only when running on Opterons. I'd still be interested in
figuring out how to get a more complete backtrace, but at least the
immediate problem i
For what it's worth, on our cluster I currently do compile VASP with OpenMPI
but we do not include ScaLAPACK because we didn't see a speedup from including
it. So far we haven't seen improvements from using OpenMP in VASP or MKL, so
we're not doing much with OpenMP either.
On our shared memory
Hi - I've been trying to run VASP 5.2.12 with ScaLAPACK and openmpi
1.6.x on a single 32 core (4 x 8 core) Opteron node, purely shared memory.
We've always had occasional hangs with older OpenMPI versions
(1.4.3 and 1.5.5) on these machines, but infrequent enough to be usable
and not worth my tim
