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Subject: Re: [OMPI users] mpi test program "ring" failed: blocked at MPI_Send
From: Tom Bryan (tombry) (tombry_at_[hidden])
Date: 2012-09-25 09:38:23

On 9/25/12 9:10 AM, "Jeff Squyres (jsquyres)" <jsquyres_at_[hidden]> wrote:

>>problem, so i fixed it using "--mca btl_tcp_if_include bond0" because I
>>know this is the high speed network interface I should use on each node.
>Glad it works for you!
>If you're not using those interfaces (they might be related to Xen, or
>something like that?), you might want to disable them.

YMMV, but on our RHEL machines, I believe that the virbr0 interface is
coming from the libvirt package.