+1 to what Jeff said.
cuda-awareness in OpenMPI.
Post by Jeff Squyres (jsquyres) via usersThe "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
https://www.open-mpi.org/doc/v3.1/man3/MPIX_Query_cuda_support.3.php
Post by Akshay VenkateshThe first one is the critical one. If the build was not configured
--with-cuda, then it's unlikely cuda-aware MPI is supported.
Post by Akshay VenkateshOn Tue, Oct 30, 2018, 12:10 PM Andrei Berceanu <
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 <
Andrei,
$ 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=$HOME/ucx-github/build/lib' '--enable-debug'
'--enable-mem-debug' '--enable-mpi-fortran=no' '--disable-oshmem'
'--enable-install-libpmix' '--with-ompi-pmix-rte'
Post by Akshay Venkatesh$ ompi_info -a | grep "xtensions"
MPI extensions: affinity, cuda, pcollreq
On Tue, Oct 30, 2018 at 11:40 AM Andrei Berceanu <
Hi all,
it has CUDA support or not?
Post by Akshay VenkateshBest,
Andrei
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