OFI*-capable Network Fabrics Control
Control the capability of the direct receive in the OFI fabric.
|enable | yes | on | 1||Enable direct receive. This is the default value|
|disable | no | off | 0||Disable direct receive|
Use the direct receive capability to block MPI_Recv calls only. Before using the direct receive capability, ensure that you use it for single-threaded MPI applications and check if you have selected OFI as the network fabric by setting I_MPI_FABRICS=ofi.
Control the usage of libfabric* shipped with the Intel® MPI Library.
|enable | yes | on | 1||Use libfabric from the Intel MPI Library|
|disable | no | off | 0||Do not use libfabric from the Intel MPI Library|
Set this environment variable to disable or enable usage of libfabric from the Intel MPI Library. The variable must be set before sourcing the vars.bat script.
> set I_MPI_OFI_LIBRARY_INTERNAL=1 > call <installdir> \env\vars.bat
Setting this variable is equivalent to passing the -ofi_internal option to the vars.bat script.
For more information, refer to the Intel® MPI Library Developer Guide, section Libfabric* Support.
Enable dynamic tag partitioning.
|enable | yes | on | 1||Enable automatic OFI tag partitioning|
|disable | no | off | 0||Use static OFI tag layout. This is the default value|
Set this environment variable to enable dynamic OFI Netmod tag partitioning based on the run configuration. You can use it to get larger MPI tag space or to improve scalability in large-scale runs.