Article

Bogus OpenMP KMP_AFFINITY warnings on non-Intel processor hosts

An application compiled with -Qopenmp (Windows*)/-openmp (Linux*) and run on a host not containing a genuine Intel® processor may generate bogus OMP: Warning #71 and Warning #72.
Authored by Kenneth Craft (Intel) Last updated on 05/25/2018 - 15:48
Blog post

OpenMP* 4.0 may offer important solutions for targeting and vectorization

The upcoming OpenMP 4.0 will be discussed at SC12, and there wil

Authored by James R. (Blackbelt) Last updated on 05/28/2018 - 18:28
Article

Intel® C++ and Fortran Compilers now support the OpenMP* 3.1 Specification

The newest releases of the Intel® C++ and Fortran Compilers support new features in the OpenMP* 3.1 Specification
Authored by Kenneth Craft (Intel) Last updated on 05/25/2018 - 15:48
Article

Don't Use the OpenMP* THREADPRIVATE 'Compatibility' Option when Everything is Compiled by Intel

The Intel C++ and Fortran compilers for Windows* and Linux* provide 'legacy' and 'compatibility' implementations of the OpenMP THREADPRIVATE directive. The 'compatibility' option should not be used when everything is compiled by Intel compilers.
Authored by Kenneth Craft (Intel) Last updated on 07/08/2019 - 15:12
Article

Using KMP_AFFINITY to create OpenMP* thread mapping to OS proc IDs

This article explains how to create your own OpenMP* thread mapping to OS proc IDs with Intel® C/C++ and Fortran compiler, by setting environment variable KMP_AFFINITY. It also provides some thread affinity demo results on when use different settings.
Authored by Last updated on 05/25/2018 - 15:30
Article

OpenMP* 4.0 Combined Offload Constructs Support for the Intel® Xeon Phi™ Coprocessor

The Intel® Parallel Studio XE 2015 Composer Editions for Windows* and Linux* have feature enhancements that provide near full support of the OpenMP* 4.0 API (July 2013) specification.

Authored by Last updated on 10/15/2019 - 15:30
Article

internal threshold was exceeded

In very large, complex functions, loops preceded by OpenMP directives may not be threaded. Compiler may emit the warning remark: "An internal threshold was exceeded: loops may not be vectorized or parallelized. Try to reduce routine size."
Authored by Martyn Corden (Intel) Last updated on 12/26/2018 - 13:11
Article

OMP_PROC_BIND is Now Supported on Compatible Non-Intel Processors

The newest versions of the Intel® C++ and Fortran compilers now support OpenMP* environment variable OMP_PROC_BIND on compatible non-Intel processors for Linux* and Windows* platfo

Authored by Kenneth Craft (Intel) Last updated on 10/08/2019 - 18:20
Article

Recommended Settings for Calling Intel® Math Kernel Library Routines from Multi-Threaded Applications

Recommended settings for calling Intel MKL routines from multi-threaded1 applications
Authored by Konstantin Arturov (Intel) Last updated on 10/15/2019 - 16:50
Article

Vectorization Essentials

Vectorization essentials to effectively use feature in the Intel® Xeon product family
Authored by admin Last updated on 10/02/2019 - 15:11