RE: [Gomp-discuss] parallell vs. distributed

[Scott Robert Ladd]

Steven Bosscher wrote:
> Pedantic: SGI Altix is *not* SMP ("symmetric multi processor").  Instead
> it's a NUMA machine (Cray NUMAflex architecture on top of Intel Itanium)
> :-P

Grumble, grumble... that's why I had "SMP Supercomputer" in quotes. I
thought we already has enough acronyms in play! ;)

> I'd expect that NUMA and OpenMP don't go together very well unless you
> can do some kind of decomposition of the problem.  IIRC that's BLOCK and
> DISTRIBUTE in High Performance Fortran[1].  Hard stuff.

SGI's literature for the Altix advertises using both OpenMP and MPI for
parallel development. If you make a Google search for "OpenMP" and "NUMA",
you'll see a lot of papers discussing this very issue.

..Scott