[torqueusers] doubt of running job on infiniband network

Christopher Samuel samuel at unimelb.edu.au
Mon Apr 23 21:12:49 MDT 2012


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On 24/04/12 03:04, Coyle, James J [ITACD] wrote:

> For openmpi compiled this way, communication uses IB if it is 
> available, otherwise it will use IP (Ethernet) communication.

You can verify that it is doing so by using lsof on the process and
looking for it accessing the uverbs device, thus:

[root at merri001 ~]# lsof -p 22234 | grep uverbs
namd2   22234 samuel  mem    CHR            231,192              6424
/dev/infiniband/uverbs0
namd2   22234 samuel   12u   CHR            231,192      0t0     6424
/dev/infiniband/uverbs0


- -- 
    Christopher Samuel - Senior Systems Administrator
 VLSCI - Victorian Life Sciences Computation Initiative
 Email: samuel at unimelb.edu.au Phone: +61 (0)3 903 55545
         http://www.vlsci.unimelb.edu.au/

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