OMP_THREAD_LIMIT
– Set the maximum number of threads ¶Specifies the number of threads to use for the whole program. The value of this variable shall be a positive integer. If undefined, the number of threads is not limited.
OMP_NUM_THREADS
– Specifies the number of threads to use, omp_get_thread_limit
– Maximum number of threads
OpenMP specification v4.5, Section 4.10