I have parallelized my program with OpenMP. I have many of these "#pragma omp threadprivate" directives in my code:
static float cost_penalty; static float bc_penalty; static float explicit_cost; static float time_penal_piece_link_below; static float time_penal_piece_link_above; static float time_penal_piece_below; static float time_penal_piece_above; static float time_penal_paid_below; static float time_penal_paid_above; static float time_penal_work_below; static float time_penal_work_above; static float br_cost_penalty; static float br_bc_penalty; static int is_tripper_pre = 0; static int is_tripper_h_res = 0; static int is_tripper = 0; static int have_break_rule = 0; static int have_break_intervals = SCHED_FALSE; #ifdef _OPENMP #pragma omp threadprivate ( cost_penalty, \ bc_penalty, \ br_cost_penalty, \ br_bc_penalty, \ is_tripper_pre, \ is_tripper_h_res, \ is_tripper, \ have_break_rule, \ explicit_cost, \ time_penal_piece_link_below, \ time_penal_piece_link_above, \ time_penal_piece_below, \ time_penal_piece_above, \ time_penal_paid_below, \ time_penal_paid_above, \ time_penal_work_below, \ time_penal_work_above ) #endif
With the msvc 2017 Professional Compiler I get the following running times:
Now I have build my program with the free Trial version of Intel Parallel Studio XE 2017. When I switch to the Intel Compiler I have these running times:
Why is the Intel Compiler so slow in comparison to the msvc 2017 Compiler? Do I have to set any compiler flag to fix this problem?
Thank you for your Help,