The "Configure command line" shows you the command line that was given to
"configure" when building Open MPI.
The "MPI extensions" line just indicates which Open MPI "extensions" were built.
CUDA is one of the possible extensions that can get built.
The CUDA Open MPI extension is actually an API call that will tell you if your
Open MPI has CUDA support:
https://www.open-mpi.org/doc/v3.1/man3/MPIX_Query_cuda_support.3.php
> On Oct 30, 2018, at 3:14 PM, Akshay Venkatesh <akshay.v.3...@gmail.com> wrote:
>
> The first one is the critical one. If the build was not configured
> --with-cuda, then it's unlikely cuda-aware MPI is supported.
>
> On Tue, Oct 30, 2018, 12:10 PM Andrei Berceanu <andreicberce...@gmail.com>
> wrote:
> Thanks! I tried both and
> ompi_info -a | grep "\-with\-cuda" returns nothing, while
> ompi_info -a | grep "xtensions" returns
> MPI extensions: affinity, cuda
>
> It seems the two outputs are in conflict, what does that mean?
>
>
> On Tue, Oct 30, 2018 at 8:50 PM Akshay Venkatesh <akshay.v.3...@gmail.com>
> wrote:
> Andrei,
>
> I generally check with one of these two:
>
> $ ompi_info -a | grep "\-with\-cuda"
> Configure command line: '--prefix=$HOME/ompi/build-cuda'
> '--enable-mpirun-prefix-by-default' '--with-cuda=/usr/local/cuda'
> '--with-ucx=$HOME/ucx-github/build'
> '--with-ucx-libdir=$HOME/ucx-github/build/lib' '--enable-debug'
> '--enable-mem-debug' '--enable-mpi-fortran=no' '--disable-oshmem'
> '--enable-install-libpmix' '--with-ompi-pmix-rte'
>
> $ ompi_info -a | grep "xtensions"
> MPI extensions: affinity, cuda, pcollreq
>
>
> On Tue, Oct 30, 2018 at 11:40 AM Andrei Berceanu <andreicberce...@gmail.com>
> wrote:
> Hi all,
>
> I am using openmpi@3.1.2 on an Ubuntu@16.04.5 box, how can I check if it has
> CUDA support or not?
>
> Best,
> Andrei
> _______________________________________________
> users mailing list
> users@lists.open-mpi.org
> https://lists.open-mpi.org/mailman/listinfo/users
>
>
> --
> -Akshay
> NVIDIA
> _______________________________________________
> users mailing list
> users@lists.open-mpi.org
> https://lists.open-mpi.org/mailman/listinfo/users
> _______________________________________________
> users mailing list
> users@lists.open-mpi.org
> https://lists.open-mpi.org/mailman/listinfo/users
> _______________________________________________
> users mailing list
> users@lists.open-mpi.org
> https://lists.open-mpi.org/mailman/listinfo/users
--
Jeff Squyres
jsquy...@cisco.com
_______________________________________________
users mailing list
users@lists.open-mpi.org
https://lists.open-mpi.org/mailman/listinfo/users
