Intel® MPI Library

Developer Guide for Windows* OS

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ID 768730
Date 6/30/2025
Public
Document Table of Contents
Document Table of Contents x
Developer Guide for Windows* OS
Developer Guide for Windows* OS x
Introduction Installation and Prerequisites Compiling and Linking Running Applications Debugging Applications Analysis and Tuning Troubleshooting Notices and Disclaimers
Introduction x
Introducing Intel® MPI Library Conventions and Symbols Related Information
Installation and Prerequisites x
Installation Prerequisite Steps User Authorization
Compiling and Linking x
Compiling an MPI Program Configuring a Microsoft Visual Studio* Project
Running Applications x
Running Intel® MPI Library in Containers Selecting a Library Configuration Running an MPI Program Running an MPI/OpenMP* Program MPMD Launch Mode Fabrics Control Job Schedulers Support Controlling Process Placement Java* MPI Applications Support
Running Intel® MPI Library in Containers x
Build a Singularity* Container for an MPI Application Run the Application with a Container
Fabrics Control x
Selecting Fabrics Libfabric* Support Enabling Libfabric Support Supported Providers See Also OFI* Providers Support
Debugging Applications x
Debugging Using -gtool for Debugging
Analysis and Tuning x
Displaying MPI Debug Information Tracing Applications MPI Tuning
Troubleshooting x
Error Message: Bad Termination Error Message: No such file or Directory Error Message: Permission Denied Error Message: Fatal Error Error Message: Bad File Descriptor Error Message: Too Many Open Files Problem: MPI Application Hangs Problem: Password Required Problem: Cannot Execute Binary File Problem: MPI limitation for Docker*
Developer Guide for Windows* OS

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.bat) 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 -i_mpi_ofi_internal option passed to the script: 

# Do not set the environment to libfabric from the Intel MPI Library.
> call <install-dir>\env\vars.bat -i_mpi_ofi_internal=0

# Set the environment to libfabric from the Intel MPI Library.
> call <install-dir>\env\vars.bat -i_mpi_ofi_internal=1
NOTE:
Set the I_MPI_DEBUG environment variable to 1 before running an MPI application to see the libfabric version and provider.

Example

> set I_MPI_DEBUG=1
> mpiexec -n 2 IMB-MPI1 pingpong
[0] MPI startup(): libfabric version: 1.5.3-impi

...

Supported Providers

  • tcp
  • netdir

See Also

Parent topic: Fabrics Control
Level Two Title