Intel® MPI Library Developer Reference for Windows* OS

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ID 768734
Date 3/22/2024
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Document Table of Contents
Document Table of Contents x
Intel® MPI Library Developer Reference for Windows* OS
Intel® MPI Library 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 I_MPI_{CC,CXX,FC,F77,F90}_PROFILE I_MPI_{CC,CXX,FC,F77,F90} I_MPI_ROOT VT_ROOT I_MPI_COMPILER_CONFIG_DIR I_MPI_LINK 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 Shared Memory Control OFI*-capable Network Fabrics Control
Intel® MPI Library Developer Reference for Windows* OS

Compilation Environment Variables

I_MPI_{CC,CXX,FC,F77,F90}_PROFILE

Specify the default profiling library.

Syntax

I_MPI_CC_PROFILE=<profile-name>

I_MPI_CXX_PROFILE=<profile-name>

I_MPI_FC_PROFILE=<profile-name>

I_MPI_F77_PROFILE=<profile-name>

I_MPI_F90_PROFILE=<profile-name>

Argument

<profile-name> Specify a default profiling library.

Description

Set this environment variable to select a specific MPI profiling library to be used by default. This has the same effect as using -profile=<profile-name> as an argument for mpiicc or another Intel® MPI Library compiler wrapper.

I_MPI_{CC,CXX,FC,F77,F90}

Set the path/name of the underlying compiler to be used.

Syntax

I_MPI_CC=<compiler>

I_MPI_CXX=<compiler>

I_MPI_FC=<compiler>

I_MPI_F77=<compiler>

I_MPI_F90=<compiler>

Arguments

<compiler> Specify the full path/name of compiler to be used.
  • I_MPI_CC=<compiler> affects mpiicx and mpicc
  • I_MPI_CXX=<compiler> affects mpiicpx and mpicxx
  • I_MPI_FC=<compiler> affects mpifc
  • I_MPI_F77=<compiler> affects mpif77
  • I_MPI_F90=<compiler> affects mpiifx and mpif90

Description

Set this environment variable to select a specific compiler to be used. Specify the full path to the compiler if it is not located in the search path.

NOTE:
Some compilers may require additional command line options.

I_MPI_ROOT

Set the Intel MPI Library installation directory path.

Syntax

I_MPI_ROOT=<path>

Arguments

<path> Specify the installation directory of the Intel MPI Library.

Description

Set this environment variable to specify the installation directory of the Intel MPI Library.

NOTE:
If you are using the Visual Studio integration, you may need to use I_MPI_ONEAPI_ROOT.

VT_ROOT

Set Intel® Trace Collector installation directory path.

Syntax

VT_ROOT=<path>

Arguments

<path> Specify the installation directory of the Intel Trace Collector.

Description

Set this environment variable to specify the installation directory of the Intel Trace Collector.

I_MPI_COMPILER_CONFIG_DIR

Set the location of the compiler configuration files.

Syntax

I_MPI_COMPILER_CONFIG_DIR=<path>

Arguments

<path> Specify the location of the compiler configuration files. The default value is <install-dir>\etc

Description

Set this environment variable to change the default location of the compiler configuration files.

I_MPI_LINK

Select a specific version of the Intel MPI Library for linking.

Syntax

I_MPI_LINK=<arg>

Arguments

Argument Library Version
opt Multi-threaded optimized library. This is the default value
dbg Multi-threaded debug library

Description

Set this variable to always link against the specified version of the Intel MPI Library.

Parent topic: Environment Variable Reference
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