-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 03/09/13 10:56, Ralph Castain wrote:
> Yeah - --with-pmi=<path-to-pmi.h> Actually I found that just --with-pmi=/usr/local/slurm/latest worked. :-) I've got some initial numbers for 64 cores, as I mentioned the system I found this on initially is so busy at the moment I won't be able to run anything bigger for a while, so I'm going to move my testing to another system which is a bit quieter, but slower (it's Nehalem vs SandyBridge). All the below tests are with the same NAMD 2.9 binary and within the same Slurm job so it runs on the same cores each time. It's nice to find that C code at least seems to be backwardly compatible! 64 cores over 18 nodes: Open-MPI 1.6.5 with mpirun - 7842 seconds Open-MPI 1.7.3a1r29103 with srun - 7522 seconds so that's about a 4% speedup. 64 cores over 10 nodes: Open-MPI 1.7.3a1r29103 with mpirun - 8341 seconds Open-MPI 1.7.3a1r29103 with srun - 7476 seconds So that's about 11% faster, and the mpirun speed has decreased though of course that's built using PMI so perhaps that's the cause? cheers, 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/ iEUEARECAAYFAlImiUUACgkQO2KABBYQAh+WvwCeM1ufCWvK627oz8aBbgKjfONe cDEAmM3w+/EJ0unbmaetNR3ay4U6nrM= =v/PT -----END PGP SIGNATURE-----
