Libfabric* Support
The Intel® MPI Library switched from the Open Fabrics Alliance* (OFA) framework to the Open Fabrics Interfaces* (OFI) framework and currently supports libfabric*.
Enabling Libfabric Support
By default, the script that sets the environmental variables (
vars.[c]sh)
sets the environment to libfabric shipped with the Intel MPI Library.
To disable this, use the
I_MPI_OFI_LIBRARY_INTERNAL
environment variable or the
-ofi_internal
option passed to the script:
# Do not set the environment to libfabric from the Intel MPI Library. $ source <install-dir>/env/vars.sh -ofi_internal=0 # Set the environment to libfabric from the Intel MPI Library. $ source <install-dir>/env/vars.sh -ofi_internal=1 # A short form of -ofi-internal=1 $ source <install-dir>/env/vars.sh
Set the
I_MPI_DEBUG
environment variable to 1 before running an MPI application to see the libfabric version and provider.
Example
$ export I_MPI_DEBUG=1 $ mpiexec -n 1 IMB-MPI1 -help [0] MPI startup(): libfabric version: 1.5.0 [0] MPI startup(): libfabric provider: psm2 ...
Supported Providers
- libmlx-fi.so
- libpsmx2-fi.so
- librxm-fi.so
- libsockets-fi.so
- libtcp-fi.so
- libverbs-fi.so
See Also
- "OFI-Capable Network Fabrics Control" in the Intel MPI Library Developer Reference