Intel® MPI Library Developer Guide for Linux* OS

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ID 768728
Date 7/13/2023
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Document Table of Contents
Document Table of Contents x
Intel® MPI Library Developer Guide for Linux* OS
Intel® MPI Library Developer Guide for Linux* OS x
Introduction Installation and Prerequisites Compiling and Linking Running Applications Debugging Applications Analysis and Tuning Troubleshooting Additional Supported Features Examples Notices and Disclaimers
Introduction x
Introducing Intel® MPI Library Conventions and Symbols Related Information
Installation and Prerequisites x
Installation Prerequisite Steps
Compiling and Linking x
Compiling an MPI Program Compilers Support ILP64 Support
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 OFI* Providers Support
Debugging Applications x
Debugging Using -gtool for Debugging
Analysis and Tuning x
Displaying MPI Debug Information Tracing Applications Interoperability with Other Tools Through -gtool 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: High Memory Consumption Readings Problem: MPI Application Hangs Problem: Password Required Problem: Cannot Execute Binary File Problem: MPI limitation for Docker*
Additional Supported Features x
Asynchronous Progress Control Multiple Endpoints Support
Multiple Endpoints Support x
MPI_THREAD_SPLIT Programming Model Threading Runtimes Support Program Examples Code Change Guide
Examples x
async_progress_sample.c thread_split.cpp thread_split_omp_for.c thread_split_omp_task.c thread_split_pthreads.c
Intel® MPI Library Developer Guide for Linux* OS

Prerequisite Steps

Before you start using any of the Intel® MPI Library functionality, make sure to establish the proper environment settings:

  1. Set up the Intel MPI Library environment by sourcing the setvars.sh script, which is found in your installation directory (by default, /opt/intel/oneapi/mpi/<version> ).

    NOTE:
    You must run setvars at the start of each session. See the Intel oneAPI HPC Toolkit Get Started Guide for more details, including options for automatic setup of environment settings.

  2. To run an MPI application on a cluster, the Intel MPI Library needs to know names of all its nodes. Create a text file listing the cluster node names. The format of the file is one name per line, and the lines starting with # are ignored. To get the name of a node, use the hostname utility.

    A sample host file may look as follows: 

    $ cat ./hosts
# This line is ignored
clusternode1
clusternode2
clusternode3
clusternode4

  3. For communication between cluster nodes, in most cases the Intel MPI Library uses the SSH protocol. You need to establish a passwordless SSH connection to ensure proper communication of MPI processes.

IntelMPI uses PowerShell bootstrap by default. It is available by default and does not require any extra steps. If you need more fine-grain setup information, refer to Microsoft PowerShell Setup Guide (https://learn.microsoft.com/en-us/powershell/module/microsoft.powershell.core/about/about_remote_requirements?view=powershell-7.3), Security Guide (https://learn.microsoft.com/en-us/powershell/scripting/learn/remoting/winrmsecurity?view=powershell-7.3), and Troubleshooting Guide (https://learn.microsoft.com/en-us/powershell/module/microsoft.powershell.core/about/about_remote_troubleshooting?view=powershell-7.3). You can also consider domain-based authorization as an alternative to the default mechanism. However, this method requires additional configuration.

After completing these steps, you are ready to use the Intel MPI Library.

Parent topic: Installation and Prerequisites
Level Two Title