On Sep 20, 2013, at 1:00 PM, Lloyd Brown <lloyd_br...@byu.edu> wrote:
> It is interesting to me, though, that I need to explicitly exclude > lo/127.0.0.1 in this case, but when I'm on an Ethernet-only node, and I > just do the plain "mpirun ./appname", I don't have to exclude anything, > and it figures out to use em1, and not lo. This is probably a case of Open MPI being "too helpful" / optimizing for the common case: ignoring 127.0.0.1/8. Specifically: - btl_tcp_if_include defaults to empty - btl_tcp_if_exclude defaults to 127.0.0.1/8 Meaning: if you specify nothing, you'll exclude localhost. If you specify an include, it takes precedence over the default exclude. If you specify an exclude, you need to *also* ignore localhost. -- Jeff Squyres jsquy...@cisco.com For corporate legal information go to: http://www.cisco.com/web/about/doing_business/legal/cri/
