Developer Guide and Reference

Contents

par-num-threads, Qpar-num-threads

Specifies the number of threads to use in a parallel region.

Syntax

Linux and macOS:
-par-num-threads
=
n
Windows:
/Qpar-num-threads
:
n
Arguments
n
Is the number of threads to use. It must be a positive integer.
Default
OFF
The number of threads to use is determined by the run-time environment.
Description
This option specifies the number of threads to use in a parallel region.
It has the same effect as environment variable OMP_NUM_THREADS.
This option overrides the environment variable when both are specified.
This option only has an effect if the following is true:
  • You have specified option
    [Q]parallel
    or
    option
    [q or Q]openmp
    (or both)
    .
  • You are compiling the main program.
Alternate Options
None