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Subject: Re: [OMPI users] help: sm btl does not work when I specify the same host twice or more in the node list
From: Jeff Squyres (jsquyres_at_[hidden])
Date: 2012-02-14 06:13:58

On Feb 13, 2012, at 2:26 PM, yanyg_at_[hidden] wrote:

> I tried to run the same test of ring_c from standard examples in
> Open MPI 1.4.3 distribution. If I ran as you described from the
> command line, it worked without any problem with sm btl
> included(with --mca btl self,sm,openib). However, if I use sm
> btl(with --mca btl self,sm,openib), and ran ring_c from an in-house
> script, it showed the same issue as I described in my previous
> email, it will hang at MPI_Init(...) call. I think this issue is related to
> some environmental setting in the script. Do you have any hints,
> any prerequisite of system environmental configuration to work with
> sm btl layer in Open MPI?

There actually aren't too many tunables in the sm BTL itself.

Can you share the script that you're using to launch Open MPI?

If not, can you share the output of "env | grep OMPI" from your script, perhaps on the line before you launch mpirun?

Jeff Squyres
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