• 2019 Update 7
  • 03/31/2020

libfabric* Support

Intel® MPI Library Developer Guide for Linux* OS
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 (
for oneAPI and  
for PSXE) sets the environment to libfabric shipped with the Intel MPI Library.
To disable this, use the
environment variable or the
option passed to the script:
$ source
/intel64/bin/mpivars.sh -ofi_internal=0 # do not set the environment to libfabric from the Intel MPI Library $ source
/intel64/bin/mpivars.sh -ofi_internal=1 # set the environment to libfabric from the Intel MPI Library $ source
/intel64/bin/mpivars.sh # a short form of -ofi-internal=1
Set the
environment variable to 1 before running an MPI application to see the libfabric version and provider.

Supported providers

  • l
  • libpsmx2-fi.so
  • librxm-fi.so
  • libsockets-fi.so
  • libtcp-fi.so
  • libverbs-fi.so

Product and Performance Information


Intel's compilers may or may not optimize to the same degree for non-Intel microprocessors for optimizations that are not unique to Intel microprocessors. These optimizations include SSE2, SSE3, and SSSE3 instruction sets and other optimizations. Intel does not guarantee the availability, functionality, or effectiveness of any optimization on microprocessors not manufactured by Intel. Microprocessor-dependent optimizations in this product are intended for use with Intel microprocessors. Certain optimizations not specific to Intel microarchitecture are reserved for Intel microprocessors. Please refer to the applicable product User and Reference Guides for more information regarding the specific instruction sets covered by this notice.

Notice revision #20110804