On Jul 14, 2006, at 10:40 AM, Michael Kluskens wrote:
I've looked through the documentation but I haven't found the discussion about what each BTL device is, for example, I have: MCA btl: self (MCA v1.0, API v1.0, Component v1.2) MCA btl: sm (MCA v1.0, API v1.0, Component v1.2) MCA btl: tcp (MCA v1.0, API v1.0, Component v1.0) I found a PDF presentation that describes a few: • tcp - TCP/IP • openib – Infiniband OpenIB Stack • gm/mx- Myrinet GM/MX • mvapi - Infiniband Mellanox Verbs • sm - Shared Memory Are there any others I may see when interacting with other people's computers?
These will be the most common. I don't know OMPI plans to support other networks like quadrics in the future or not.
I assume that if a machine has Myrinet and I don't see MCA btl: gm or MCA btl: mx then I have to explain the problem to the sysadm's.
Yes, did you build OMPI your self or is this a system wide install? If you installed it your self you need to find ware the gm or mx libs are stored and run ./configure with the --with-gm=/path/to/gm or -- with-mx=/path/to/mx On our Mac cluster the gm libs are in /opt/gm/lib but you only need to do ./configure --with-gm=/opt/gm --other-options
Hope that helps Brock Palen Center for Advanced Computing bro...@umich.edu (734)936-1985
The second question is should I see both gm & mx, or only one or the other.
You only need one of them. We have only used GM as our older hardware does not support MX, but if i understand correctly if you can use MX use it. Maybe someone who has tested both will chime in?
Michael _______________________________________________ users mailing list us...@open-mpi.org http://www.open-mpi.org/mailman/listinfo.cgi/users
