computation_duration = (double *) calloc(host_list_size, sizeof(double));
communication_table =
(double *) calloc(host_list_size * host_list_size, sizeof(double));
computation_duration = (double *) calloc(host_list_size, sizeof(double));
communication_table =
(double *) calloc(host_list_size * host_list_size, sizeof(double));