Article

Intel® C++ Compiler - ANSI C/C++ and OpenMP* compliance

C Standard Conformance

Authored by Jennifer J. (Blackbelt) Last updated on 08/01/2019 - 19:50
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

Diagnostic 1392: variable "entity" in firstprivate or lastprivate clause of an OpenMP pragma must be shared in the enclosing context

CauseOne case that the Intel C++ Compiler will emitting this diagnostic message is when using the "firstprivate" of OpenMP* with a wrong syntax.

Authored by admin Last updated on 05/25/2018 - 15:30
Article

OpenMP und inkrementelle Parallelisierung - (article in german)

In diesem Artikel wird der inkrementelle OpenMP Ansatz zur Parallelisierung von sequentiellen Programmen vorgestellt. Der Schwerpunkt liegt auf der praktischen Darstellung von einfachen Programmbeispielen und nicht auf der Vollständigkeit der Beschreibung
Authored by admin Last updated on 12/12/2018 - 18:00
Article

Intel thread affinity environment variable for OpenMP*

Intel thread affinity environment variable KMP_AFFINITY for openMP is explained in Compiler Intel® compiler user guide topic “Thread Affinity Interface (Linux* and Windows*)”.
Authored by Last updated on 12/31/2018 - 15:00
Article

Intel® Professional Edition Compilers 11.1 Fixes List

This page lists fixes that have been made in Intel Professional Edition Compilers 11.1.
Authored by Elizabeth S (Intel) Last updated on 05/25/2018 - 15:30
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

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

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

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