Developer Guide and Reference

Contents

qopenmp, Qopenmp

Enables recognition of OpenMP* features and tells the parallelizer to generate multi-threaded code based on OpenMP* directives.

Syntax

Linux:
-qopenmp
-qno-openmp
Windows:
/Qopenmp
/Qopenmp-
Arguments
None
Default
-qno-openmp
or
/Qopenmp-
No OpenMP* multi-threaded code is generated by the compiler.
Description
This option enables recognition of OpenMP* features and tells the parallelizer to generate multi-threaded code based on OpenMP* directives. The code can be executed in parallel on both uniprocessor and multiprocessor systems.
This option works with any optimization level. Specifying no optimization (
-O0
on Linux* or
/Od
on Windows*) helps to debug OpenMP applications.
This option can also be specified as
-fopenmp
on Linux* systems.
To enable offloading to a specified GPU target, you must also specify option
fopenmp-targets
(Linux*) or
/Qopenmp-targets
(Windows).
Option
-fopenmp
is not the same as option
-qopenmp
. Option
-fopenmp
will
not
do offloading.
Options that use OpenMP* API are available for both Intel® microprocessors and non-Intel microprocessors, but these options may perform additional optimizations on Intel® microprocessors than they perform on non-Intel microprocessors. The list of major, user-visible OpenMP constructs and features that may perform differently on Intel® microprocessors versus non-Intel microprocessors include: locks (internal and user visible), the SINGLE construct, barriers (explicit and implicit), parallel loop scheduling, reductions, memory allocation, thread affinity, and binding.
Product and Performance Information
Performance varies by use, configuration and other factors. Learn more at www.Intel.com/PerformanceIndex.
Notice revision #20201201
IDE Equivalent
Visual Studio:
Language > OpenMP* Support
Eclipse:
Language > Process OpenMP Directives
Alternate Options
Linux:
-fiopenmp
Windows:
/Qiopenmp

Product and Performance Information

1

Performance varies by use, configuration and other factors. Learn more at www.Intel.com/PerformanceIndex.