Gilles,
For some odd reason, 'self, vader' didn't seem as effective as "^tcp". Not
sure why, but at least I have something that seems to work.
I suppose I don't really need tcp sockets on a single laptop :D
Matt
On Thu, Mar 18, 2021 at 8:46 PM Gilles Gouaillardet via users <
users@lists.open-mp
Matt,
you can either
mpirun --mca btl self,vader ...
or
export OMPI_MCA_btl=self,vader
mpirun ...
you may also add
btl = self,vader
in your /etc/openmpi-mca-params.conf
and then simply
mpirun ...
Cheers,
Gilles
On Fri, Mar 19, 2021 at 5:44 AM Matt Thompson via users
wrote:
>
> Prentice,
>
Prentice,
Ooh. The first one seems to work. The second one apparently is not liked by
zsh and I had to do:
❯ mpirun -mca btl '^tcp' -np 6 ./helloWorld.mpi3.exe
Compiler Version: GCC version 10.2.0
MPI Version: 3.1
MPI Library Version: Open MPI v4.1.0, package: Open MPI
mathomp4@gs6101-parcel.local
OpenMPI should only be using shared memory on the local host
automatically, but maybe you need to force it.
I think
mpirun -mca btl self,vader ...
should do that.
or you can exclude tcp instead
mpirun -mca btl ^tcp
See
https://www.open-mpi.org/faq/?category=sm
for more info.
Prentice
On
