On Mon, Aug 08, 2005, John Mongan wrote:
> Has anyone else tried the new version 9 intel compilers? In my fairly
> informal testing, sander compiled with ifort 9 seems to pass tests and
> appears to run 1-2% faster on my (somewhat aging) 2GHz Xeon.
Assuming that the comparison is to ifc 8.x, that would go along with our
experience: I haven't seen bugs in ifc9/icc9 that would affect sander or
NAB,
but no great performance increase either.
>
> While on the topic of performance, I've been meaning to ask: has anyone
> compared performance between different MPI implementations on "commodity
> clusters" (that is, fast dual processor x86 machines with GigE
> interconnects)? Most people around here seem to use mpich, but I've been
> wondering if mpich2 or lam (or something else?) might be better.
lam has been more stable than mpich, so we tend to favor it, not seeing
much
performance difference. I would hope that people would try mpich2
seriously
(I've just played with it). It should certainly replace mpich itself, and
maybe we could standardize on this, perhaps(?) as a first step towards
starting to use MPI-2 functionality.
...dac
Received on Wed Apr 05 2006 - 23:49:53 PDT
