Intel® MPI Library

Developer Reference for Windows* OS

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ID 768734
Date 10/31/2024
Public
Document Table of Contents
Document Table of Contents x
Developer Reference for Windows* OS
Developer Reference for Windows* OS x
Introduction Command Reference Environment Variable Reference Notices and Disclaimers
Introduction x
Introducing Intel® MPI Library Notational Conventions Related Information User Authorization
Command Reference x
Compiler Commands mpiexec.hydra cpuinfo impi_info
Compiler Commands x
Compilation Command Options
mpiexec.hydra x
Global Hydra Options Local Hydra Options
Environment Variable Reference x
Compilation Environment Variables Hydra Environment Variables I_MPI_ADJUST Family Environment Variables Tuning Environment Variables Main Thread Pinning Environment Variables for Fabrics Control Environment Variables for Memory Policy Control Other Environment Variables
Tuning Environment Variables x
Autotuning
Autotuning x
I_MPI_TUNING_AUTO Family Environment Variables
Main Thread Pinning x
Environment Variables for Main Thread Pinning Interoperability with OpenMP* API
Environment Variables for Fabrics Control x
Communication Fabrics Control I_MPI_FABRICS Shared Memory Control OFI*-capable Network Fabrics Control
Developer Reference for Windows* OS

Communication Fabrics Control

I_MPI_FABRICS

Select the particular fabrics to be used.

Syntax

I_MPI_FABRICS=ofi | shm

Arguments

<fabric> Define a network fabric.
shm Shared memory transport (used for intra-node communication only).
ofi OpenFabrics Interfaces* (OFI)-capable network fabrics, such as Intel® Omni-Path Architecture, InfiniBand*, and Ethernet (through OFI API).

Description

Set this environment variable to select a specific fabric combination.

NOTE:

This option is not applicable to slurm and pdsh bootstrap servers.

Parent topic: Environment Variables for Fabrics Control
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