Intel(R) MPI Benchmarks

Contents

• Introduction
• Product Directories
• What's New
• Command-Line Control
• Building Instructions for Linux* OS
• Building Instructions for Windows* OS
• Copyright and License Information
• Legal Information

Introduction

Intel(R) MPI Benchmarks provides a set of elementary benchmarks that conform to MPI-1, MPI-2, and MPI-3 standard. You can run all of the supported benchmarks, or a subset specified in the command line using one executable file. Use command-line parameters to specify various settings, such as time measurement, message lengths, and selection of communicators. For details, see the Intel(R) MPI Benchmarks User's Guide located at: https://software.intel.com/en-us/imb-user-guide.

By default, Intel(R) MPI Benchmarks is installed at:

• C:\Program Files (x86)\IntelSWTools\imb on Windows* OS
• /opt/intel/imb on Linux* OS

Before using the Intel(R) MPI Benchmarks, please read the license agreements located in the imb/license directory.

Product Directories

After a successful installation of Intel(R) MPI Benchmarks, the following files and folders appear on your system:

+-- \imb            Intel(R) MPI Benchmarks product directory
     |
     +-- \src_c             Product source "C" code and Makefiles.
     |
     +-- \license           Product license files.
     |    |              
     |    +--license.txt    Source code license granted to you.
     |    |                             
     |    +--use-of-trademark-license.txt    License file describing the 
     |                                       use of the Intel(R) MPI 
     |                                       Benchmarks name and trademark.
     |
     +-- \src_cpp              Product source "CPP" code and Makefiles. 
     |
     +-- \WINDOWS              Microsoft* Visual Studio* project files. 
     |
     +-- Readme_IMB.txt        Readme file providing the basic information
                               about the product (this file).

What's New

New in Intel(R) MPI Benchmarks 2021.3

• Change default value for mem_alloc_type to device
• License update
• Bug fixes.

New in Intel(R) MPI Benchmarks 2021.2

• New IMB-MPI1-GPU benchmarks (Technical Preview). The benchmarks implement the GPU version of the IMB-MPI1
• Added -msg_pause option.
• Changed default window_size 64 -> 256
• Bug fixes.

New in Intel(R) MPI Benchmarks 2021.1

• Added -window_size option for IMB-MPI1
• Added copyrights for *.exe
• Bug fixes.

New in Intel(R) MPI Benchmarks 2019 Update 6

• New IMB-P2P Stencil2D and Stencil3D benchmarks.
• Bug fixes.

New in Intel(R) MPI Benchmarks 2019 Update 5

• Added Visual Studio projects for IMB-P2P
• Bug fixes.

New in Intel(R) MPI Benchmarks 2019 Update 4

• Bug fixes.

New in Intel(R) MPI Benchmarks 2019 Update 3

• Added the warm_up option that enabled additional cycles before running benchmark(for all size.)
• Added a new benchmark Reduce_local for IMB-MPI1.
• Bug fixes.

New in Intel(R) MPI Benchmarks 2019 Update 2

• New IMB-P2P benchmarks.
• Added the Reduce_local benchmark for IMB-MPI1.
• Deleted the alignment option (-alignment).
• Bug fixes.
• Code cleanup.

New in Intel(R) MPI Benchmarks 2019 Update 1

• Added the Reduce_scatter_block benchmark for IMB-MPI1.
• Added the aggregate_mode option that specifies the mode for IMB-IO, IMB-EXT and IMB-RMA.
• Added the alignment option that controls buffer alignment.
• Updated the following options:
  • -data_type now supports double.
  • -red_data_type now supports double.

New in Intel(R) MPI Benchmarks 2019

• New IMB-MT benchmarks. The benchmarks implement the multi-threaded version of IMB-MPI1 benchmarks using the OpenMP* paradigm.
• New benchmarks infrastructure for easier benchmarks extension is implemented in C++ (See the guide: https://software.intel.com/en-us/articles/creating-custom-benchmarks-for-imb-2019). The IMB-MPI1, IMB-RMA, IMB-NBC, IMB-EXT, IMB-IO, and IMB-MT implementation is now based on the new C++ infrastructure. The legacy infrastructure is preserved in the src_c subdirectory.
• Syntax changes for the -include and -exclude options. Benchmarks to include and exclude now must be separated by a comma rather than a space. Benchmarks to launch can be separated by a comma or a space.
• Iteration policy can no longer be set with the -iter option. Use the -iter_policy instead.
• Added a new benchmark BarrierMT for IMB-MT.
• Added new options:
  • -noheader for IMB-MT disables printing of benchmark headers.
  • -data_type for IMB-MPI1 specifies the type to be used for communication.
  • -red_data_type for IMB-MPI1 specifies the type to be used for reduction.
  • -contig_type for IMB-MPI1 specifies the type to be used.
  • -zero_size for IMB-MPI1 disable runs with message size 0.
• Bug fixes.
• Code cleanup.

New in Intel(R) MPI Benchmarks 2018 Update 1

• Support for the Microsoft* Visual Studio* 2017. Microsoft* Visual Studio* 2012 support is removed.

New in Intel(R) MPI Benchmarks 2018

• Product documentation is now available online only at: https://software.intel.com/en-us/imb-user-guide
• Removed support of the Intel(R) Xeon Phi(TM) coprocessors (formerly code named Knights Corner).

New in Intel(R) MPI Benchmarks 2017 Update 1

• Added a new option -imb_barrier.
• The PingPong and PingPing benchmarks are now equivalent to PingPongSpecificSource and PingPingSpecificSource, respectively. Their old behavior (with MPI_ANY_SOURCE) is available in PingPongAnySource and PingPingAnySource.

New in Intel(R) MPI Benchmarks 2017

• Changed default values for the -sync and -root_shift options.
• Support for the Microsoft* Visual Studio* 2015. Microsoft* Visual Studio* 2010 support is removed.
• Bug fixes.

New in Intel(R) MPI Benchmarks 4.1 Update 1

• Bug fixes.

New in Intel(R) MPI Benchmarks 4.1

• Introduced two new benchmarks: uniband and biband.
• Introduced two new command-line options for collective benchmarks: -sync and -root_shift.

New in Intel(R) MPI Benchmarks 4.0 Update 2

• Fix of a bug where benchmarking was failing on certain message lengths with -DCHECK.

New in Intel(R) MPI Benchmarks 4.0 Update 1

• Fix of a bug where benchmarking could continue after the time limit is exceeded.

New in Intel(R) MPI Benchmarks 4.0

• Introduced new components IMB-NBC and IMB-RMA that conform to the MPI-3.0 standard. Note: These components can only be built and used with MPI libraries that conform to the MPI-3 standard.
• Added new targets to the Linux* OS Makefiles:
  • NBC for building IMB-NBC
  • RMA for building IMB-RMA
• Updated Microsoft* Visual Studio* solutions to include the IMB-NBC and IMB-RMA targets.
• Consolidated all first-use documents in ReadMe_IMB.txt to improve usability.
• Introduced a new feature to set the appropriate algorithm for automatic calculation of iterations. The algorithm can be set through the -iter and -iter_policy options.
• Support for the Microsoft* Visual Studio* 2013. Microsoft* Visual Studio* 2008 support is removed.

Command-Line Control

You can get help on the Intel(R) MPI Benchmarks from the command line using the component name and the -help parameter. For example, for the IMB-MPI1 component, run: IMB-MPI1 -help

You can see the Intel(R) MPI Benchmarks User's Guide for details on the command-line parameters.

Building Instructions for Linux* OS

1. Set the CC variable to point to the appropriate compiler wrapper, mpiicc or mpicc.

2. Run one or more Makefile commands below:

   make clean - remove legacy binary object files and executable files make IMB-MPI1 - build the executable file for the IMB-MPI1 component make IMB-EXT - build the executable file for one-sided communications benchmarks make IMB-IO - build the executable file for I/O benchmarks make IMB-NBC - build the executable file for IMB-NBC benchmarks make IMB-RMA - build the executable file for IMB-RMA benchmarks make all - build all executable files available

3. Run the benchmarks as follows:

   mpirun -n <number_of_processes> IMB- [arguments]

   where is one of the make targets above. For details, refer to the Intel(R) MPI Benchmarks User's Guide at: https://software.intel.com/en-us/imb-user-guide

Building Instructions for Windows* OS

Use the enclosed solution files located in the component-specific subdirectories under the imb/WINDOWS directory. Click on the respective ".vcproj" or ".vcxproj" project file and use the Microsoft* Visual Studio* menu to run the associated benchmark application.

Building "x64" Executable Files

1. Check that the Include, Lib, and Path environment variables are set as follows: %I_MPI_ROOT%\intel64\include %I_MPI_ROOT%\intel64\lib %I_MPI_ROOT%\mpi\intel64\bin The %I_MPI_ROOT% environment variable is set to the Intel(R) MPI Library installation directory.

2. Open the ".vcproj" or ".vcxproj" file for the component you would like to build. From the Visual Studio Project panel: a) Change the "Solution Platforms" dialog box to "x64". b) Change the "Solution Configurations" dialog box to "Release". c) Check other settings as required, for example: General > Project Defaults - Set "Character Set" to "Use Multi-Byte Character Set" C/C++ > General - Set "Additional Include Directories" to "$(I_MPI_ROOT)\intel64\include" - Set "Warning Level" to "Level 1 (/W1)" C/C++ > Preprocessor - For the "Preprocessor definitions" within the Visual Studio projects, add the conditional compilation macros WIN_IMB and _CRT_SECURE_NO_DEPRECATE. Depending on the components you intend to use, add one or more of the following macros: MPI1, EXT, MPIIO, NBC, RMA. Linker > Input - Set "Additional Dependencies" to "$(I_MPI_ROOT)\intel64\lib\impi.lib". Make sure to add quotes.

3. Use F7 or Build > Build Solution to create an executable.

   For details, refer to the Intel(R) MPI Benchmarks User's Guide at: https://software.intel.com/en-us/imb-user-guide

Copyright and Licenses

See the license files in the imb/license directory.

Legal Information

No license (express or implied, by estoppel or otherwise) to any intellectual property rights is granted by this document.

Intel disclaims all express and implied warranties, including without limitation, the implied warranties of merchantability, fitness for a particular purpose, and non-infringement, as well as any warranty arising from course of performance, course of dealing, or usage in trade.

This document contains information on products, services and/or processes in development. All information provided here is subject to change without notice. Contact your Intel representative to obtain the latest forecast, schedule, specifications and roadmaps.

The products and services described may contain defects or errors known as errata which may cause deviations from published specifications. Current characterized errata are available on request.

Intel, Intel Core, Xeon, Xeon Phi and the Intel logo are trademarks of Intel Corporation in the U.S. and/or other countries.

• Other names and brands may be claimed as the property of others.

(C) Intel Corporation.