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2.19 omp_set_num_threads – Set upper team size limit

Description:
Specifies the number of threads used by default in subsequent parallel sections, if those do not specify a num_threads clause. The argument of omp_set_num_threads shall be a positive integer.
C/C++:

Prototype: void omp_set_num_threads(int n);

Fortran:

Interface: subroutine omp_set_num_threads(n)
integer, intent(in) :: n

See also:
OMP_NUM_THREADS, omp_get_num_threads, omp_get_max_threads
Reference:
OpenMP specifications v3.1, section 3.2.1.