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Details: - During runtime, Application can set the desired number of threads using standard OpenMP API omp_set_num_threads(nt). - BLIS Library uses standard OpenMP API omp_get_max_threads() internally, to fetch the latest value set by the application. - This value will be used to decide the number of threads in the subsequent BLAS calls. - At the time of BLIS Initialization, BLIS_NUM_THREADS environment variable will be given precedence, over the OpenMP standard API omp_set_num_threads(nt) and OMP_NUM_THREADS environment variable. - Order of precedence followed during BLIS Initialization is as follows 1. Valid value of BLIS_NUM_THREADS 2. omp_set_num_threads(nt) 3. valid value of OMP_NUM_THREADS 4. Number of cores - After BLIS initialization, if the Application issues omp_set_num_threads(nt) during runtime, number of threads set during BLIS Initialization, is overridden by the latest value set by the Application. - Existing precedence of BLIS_*_NT environment variables and the decision of optimal number of threads over the number of threads derived from the above process remains as it is. AMD-Internal: [CPUPL-2076] Change-Id: I935ba0246b1c256d0fee7d386eac0f5940fabff8