-----BEGIN PGP SIGNED MESSAGE-----
On 04/09/13 11:29, Ralph Castain wrote:
> Your code is obviously doing something much more than just
> launching and wiring up, so it is difficult to assess the
> difference in speed between 1.6.5 and 1.7.3 - my guess is that it
> has to do with changes in the MPI transport layer and nothing to do
> with PMI or not.
I'm testing with what would be our most used application in aggregate
across our systems, the NAMD molecular dynamics code from here:
so yes, you're quite right, it's doing a lot more than that and has a
reputation for being a *very* chatty MPI code.
For comparison whilst users see GROMACS also suffer with srun under
1.6.5 they don't see anything like the slow down that NAMD gets.
All the best,
Christopher Samuel Senior Systems Administrator
VLSCI - Victorian Life Sciences Computation Initiative
Email: samuel_at_[hidden] Phone: +61 (0)3 903 55545
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.11 (GNU/Linux)
Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/
-----END PGP SIGNATURE-----