Special Features and Known Issues
Copyright and Licenses
Disclaimer and Legal Information
The Intel® MPI Library for Windows* OS is a multi-fabric message passing library based on ANL* MPICH2* and OSU* MVAPICH2*.
The Intel® MPI Library for Windows* OS implements the Message Passing Interface, version 2 (MPI-2) specification.
To receive technical support and updates, you need to register your Intel® Software Development Product. See section Technical Support.
The Intel® MPI Library Runtime Environment (RTO) contains the tools you need to run programs including SMPD services and supporting utilities, dynamic libraries, and documentation.
The Intel® MPI Library Development Kit (SDK) includes all of the Runtime Environment components plus include files and modules, interface libraries, debug libraries and test codes.
Related Products and Services
Information on Intel® Software Development Products is available at http://www.intel.com/software/products.
Some of the related products include:
- The Intel® Software College provides training for developers on leading-edge software development technologies. Training consists of online and instructor-led courses covering all Intel® architectures, platforms, tools, and technologies.
The Intel® MPI Library 4.0 Update 3 for Windows* OS is an update release of the Intel® MPI Library for Windows* OS. This release includes the following updates compared to the Intel® MPI Library 4.0 Update 2 (see product documentation for more details):
The Intel® MPI Library 4.0 Update 2 for Windows* OS is an update release of the Intel® MPI Library for Windows* OS. This release includes the following updates compared to the Intel® MPI Library 4.0 Update 1 (see product documentation for more details):
The Intel® MPI Library 4.0 Update 1 for Windows* OS is an update release of the Intel® MPI Library for Windows* OS. This release includes the following updates compared to the Intel® MPI Library 4.0 (see product documentation for more details):
The Intel® MPI Library 4.0 for Windows* OS is a new release of the Intel® MPI Library for Windows* OS. This release includes the following new features compared to the Intel® MPI Library 3.2 Update 2 (see product documentation for more details):
I_MPI_FABRICS) that complements the classic Intel MPI device selection method (
I_MPI_FABRICS environment variable to select a particular network
$ mpiexec -n 4
–env I_MPI_FABRICS shm:dapl ./IMB-MPI1
See more details in the Intel® MPI Library for Windows* OS Reference Manual.
This release of the Intel® MPI Library supports the following major features:
The following sections describe supported hardware and software
Systems based on the IA-32 architecture:
Systems based on the Intel® 64 architecture:
(SDK only) Compilers:
Recommended InfiniBand Software:
Launch the installer and follow the instructions. See Intel® MPI Library for Windows* OS Installation Guide for details.
SecureDynamicLibraryLoadingenables the dynamic library loading enhanced security mode. Set the value to
enable|yes|on|1. This option is disabled by default.
I_MPI_DAT_LIBRARYspecifies the DAT library to be used in the DLL enhanced security mode. NOTE: the
I_MPI_DAT_LIBRARYenvironment variable has no effect in the dynamic library loading the enhanced security mode. See the Intel® MPI Library for Windows* OS Reference Manual for more details on this variable.
mpi_accumulate(), mpi_alloc_mem(), mpi_get(), mpi_put(), mpi_win_create())
I_MPI_FABRICSis set to
<fabric2>is not equal to
I_MPI_FABRICSvariable for each application to avoid this issue.
[0:host1][../../dapl_module_util.c:397] error(0x80060028):….: could not connect DAPL endpoints: DAT_INVALID_PARAMETER(DAT_INVALID_ARG5)
I_MPI_DYNAMIC_CONNECTIONenvironment variable to "
disable". This option may improve stability of certain DAPL* providers.
msvcr71.dlllibrary to the end user if your product redistributes the
I_MPI_PINand related environment variables to control process pinning. See the Intel® MPI Library for Windows* OS Reference Manual for details.
nmakeutility does not work correctly if the path to the Intel® MPI Library compiler drivers contains spaces. For instance,
C:\Program Files (x86)\Intel\MPI\<version>\bin\. Copy the Intel® MPI Library compiler drivers to another location to avoid this issue.
mpiexeccommand at the time of its invocation. Use the
-wdiroptions to override this functionality.
-mt_mpicompiler driver option
I_MPI_PIN_DOMAINto select the desired process pinning scheme. The recommended setting is
See the Intel® MPI Library for Windows* OS Reference Manual for more details.
OMP_NUM_THREADSenvironment variable to "
1" to run the application if linked against the non-thread-safe version of the Intel® MPI Library
-portmpiexec option to specify the MPICH2* SMPD* port number
I_MPI_SMPD_VERSION_CHECKenvironment variable to "
To reduce the probability of this issue, decrease the auto disconnect time.
From the command line do the following:
net config server /autodisconnect:time_before_autodisconnect
The default value of the auto disconnect time is usually set to 15 minutes.
mpiexec -mapalloption if your application is located or accesses any network drive mapped to your local system.
NOTE: Many routines in the libirc.lib library (linked with the Intel® MPI Library) are more optimized for Intel microprocessors than for non-Intel microprocessors.
The Intel® MPI Library for Windows* OS Getting Started Guide contains information on the following subjects:
The Intel® MPI Library for Windows* OS Reference Manual contains information on the following subjects:
The Intel® MPI Library for Windows* OS Installation Guide contains information on the following subjects:
Release Notes and user guide documentation use the notation conventions listed in the following table:
||indicates an element of syntax, a reserved word, a keyword, a file name, or part of a program example (text appears in lowercase unless UPPERCASE is required)|
||indicates what you type as input|
||indicates an argument on a command line or an option's argument|
||indicates that the items enclosed in brackets are optional|
||indicates a set of choices from which you must select one|
||indicates that an argument can be repeated several times|
Your feedback is very important to us. To receive technical support for the tools provided in this product and technical information including FAQ's and product updates, you need to register for an Intel® Premier Support account at the Registration Center.
NOTE: Registering for support varies for release product or pre-release products (alpha, beta, etc) - only released products have support web pages on http://support.intel.com/.
To register for an account, please visit the Intel® Registration Center web site. If you have forgotten your password, please email a request to: email@example.com. Please do not email your technical issue to this email address.
The product support web site, http://www.intel.com/software/products/support/mpi, provides top technical issues, frequently asked questions, product documentation, and product errata.
There is an HPC and Intel® Cluster Tools Forum for HPC experts and enthusiasts to share their knowledge, resources, and insights for the advancement of HPC solutions, cluster solutions, and the computing architectures that implement them.
Before submitting a support issue, see the Intel® MPI Library for Windows* OS Getting Started Guide for details on post-install testing to ensure that basic facilities are working.
When submitting a support issue to Intel® Premier Support, please provide specific details of your problem, including:
You can obtain version information for the Intel® MPI Library package in the file mpisupport.txt.
Steps to submit an issue
NOTE: Please notify your support representative prior to submitting source code where access needs to be restricted to certain countries to determine if this request can be accommodated.
The Intel® MPI Library is based on MPICH2* from Argonne National Laboratory* (ANL) and MVAPICH2* from Ohio State University* (OSU).
See the information below for additional licenses of the following 3rd party tools used within the Intel® MPI Library: Python*, Windows Installer XML* (WiX), and AVL Trees*.
PYTHON SOFTWARE FOUNDATION LICENSE VERSION 2
Windows Installer XML* (WiX)
Copyright (c) 1989-1997 by Brad Appleton, All rights reserved.
This software is not subject to any license of the American Telephone and
Telegraph Company or of the Regents of the University of California.
Permission is granted to anyone to use this software for any purpose on any computer system, and to alter it and redistribute it freely, subject to the following restrictions:
The Intel MPI library includes altered AVL Trees* source codes.
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The products described in this document may contain design defects or errors known as errata which may cause the product to deviate from published specifications. Current characterized errata are available on request.
Contact your local Intel sales office or your distributor to obtain the latest specifications and before placing your product order.
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Intel compilers, associated libraries and associated development tools may
include or utilize options that optimize for instruction sets that are available
in both Intel and non-Intel microprocessors (for example SIMD instruction sets),
but do not optimize equally for non-Intel microprocessors. In addition, certain
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and other factors, you likely will get extra performance on Intel
Intel compilers, associated libraries and associated development tools may or may not optimize to the same degree for non-Intel microprocessors for optimizations that are not unique to Intel microprocessors. These optimizations include Intel® Streaming SIMD Extensions 2 (Intel® SSE2), Intel® Streaming SIMD Extensions 3 (Intel® SSE3), and Supplemental Streaming SIMD Extensions 3 (Intel SSSE3) instruction sets and other optimizations. Intel does not guarantee the availability, functionality, or effectiveness of any optimization on microprocessors not manufactured by Intel. Microprocessor-dependent optimizations in this product are intended for use with Intel microprocessors.
While Intel believes our compilers and libraries are excellent choices to assist in obtaining the best performance on Intel and non-Intel microprocessors, Intel recommends that you evaluate other compilers and libraries to determine which best meet your requirements. We hope to win your business by striving to offer the best performance of any compiler or library; please let us know if you find we do not.
Notice revision #20110307