-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 21/02/12 09:52, Micha wrote:
> Things are actually more complex as this is a mixed GPU/GPU (CUDA) > system so I'm also looking for how to effectively transfer data > between GPUs siting on different PCIe slots and find the affinity > between GPUs and CPUs. Also at what stage is the support for using > MPI to copy between GPUs? The hwloc library from the Open-MPI folks will probably help with some of it: http://www.open-mpi.org/projects/hwloc/ It can show you which cores are near which PCI devices for instance and lstopo is a fantastic tool for getting a quick overview of a node. I *believe* that code is in the 1.5 series but it'd be well worth asking the question on the open-mpi lists to get a definitive answer from someone who knows what they're talking about. :-) There was also a discussion on the Open-MPI devel list recently about why MVAPICH2 appears to do better than it with GPUs (for the moment), the summary is here: http://www.open-mpi.org/community/lists/devel/2012/02/10430.php Hope this helps! 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.unimelb.edu.au/ -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAk9DEAAACgkQO2KABBYQAh8h1gCfRtYtAY6hra6ckeoC60ZkfqOe qPwAnAsZCHB/5E9QMYutgTMKiW4cdlxO =cwG5 -----END PGP SIGNATURE----- _______________________________________________ Beowulf mailing list, Beowulf@beowulf.org sponsored by Penguin Computing To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
