-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 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: http://www.ks.uiuc.edu/Research/namd/ 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, Chris - -- Christopher Samuel Senior Systems Administrator VLSCI - Victorian Life Sciences Computation Initiative Email: sam...@unimelb.edu.au Phone: +61 (0)3 903 55545 http://www.vlsci.org.au/ http://twitter.com/vlsci -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iEYEARECAAYFAlImsCwACgkQO2KABBYQAh8c4wCfQlOd6ZL68tncAd1h3Fyb1hAr DicAn06seL8GzYPGtGImnYkb7sYd5op9 =pkwZ -----END PGP SIGNATURE-----
