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Subject: Re: [OMPI users] btl_tcp_if_exclude param
From: Jeff Squyres (jsquyres_at_[hidden])
Date: 2010-04-13 09:08:48

On Apr 13, 2010, at 9:03 AM, Gabriele Fatigati wrote:

> ompi_info --param btl tcp

Ah ha... this is revealing:

> MCA btl: parameter "btl" (current value: "^tcp", data source: file
> [/cineca/prod/opt/compilers/openmpi/1.3.3/intel--11.1--binary/etc/openmpi-mca-params.conf])
> Default selection set of components for the btl framework (<none> means use all components that can be found)

It seems you have a config file /cineca/prod/opt/compilers/openmpi/1.3.3/intel--11.1--binary/etc/openmpi-mca-params.conf that is excluding the TCP BTL from being used.

This config file will even prevent the TCP BTL from being shown in ompi_info -- remember that ompi_info shows *current* values of MCA parameters. So you might want to do something like this:

    ompi_info --mca btl "" --param btl tcp

That would override the "btl" MCA parameter in your config file, allow the BTL TCP to be loaded by ompi_info, and therefore show you all the BTL TCP params.

Make sense?

Jeff Squyres
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