without objective scaling

Author: akifcorduk

cpp/src/mip_heuristics/mip_scaling_strategy.cu

@@ -284,43 +284,9 @@ void compute_big_m_skip_rows(
 }
 
 template <typename i_t, typename f_t>
-void scale_objective(cuopt::linear_programming::optimization_problem_t<i_t, f_t>& op_problem)
+void scale_objective(cuopt::linear_programming::optimization_problem_t<i_t, f_t>& /*op_problem*/)
 {
-  auto& objective_coefficients = op_problem.get_objective_coefficients();
-  const f_t min_abs_objective_coefficient =
-    thrust::transform_reduce(op_problem.get_handle_ptr()->get_thrust_policy(),
-                             objective_coefficients.begin(),
-                             objective_coefficients.end(),
-                             nonzero_abs_or_inf_transform_t<f_t>{},
-                             std::numeric_limits<f_t>::infinity(),
-                             min_op_t<f_t>{});
-
-  if (!std::isfinite(min_abs_objective_coefficient) || min_abs_objective_coefficient <= f_t(0) ||
-      min_abs_objective_coefficient >= static_cast<f_t>(min_abs_objective_coefficient_threshold)) {
-    return;
-  }
-
-  f_t obj_scaling_coefficient =
-    static_cast<f_t>(min_abs_objective_coefficient_threshold) / min_abs_objective_coefficient;
-  if (!std::isfinite(obj_scaling_coefficient) || obj_scaling_coefficient <= f_t(1)) { return; }
-  if (obj_scaling_coefficient > static_cast<f_t>(max_obj_scaling_coefficient)) {
-    obj_scaling_coefficient = static_cast<f_t>(max_obj_scaling_coefficient);
-  }
-
-  thrust::transform(op_problem.get_handle_ptr()->get_thrust_policy(),
-                    objective_coefficients.begin(),
-                    objective_coefficients.end(),
-                    objective_coefficients.begin(),
-                    [obj_scaling_coefficient] __device__(f_t objective_coefficient) -> f_t {
-                      return objective_coefficient * obj_scaling_coefficient;
-                    });
-  op_problem.set_objective_scaling_factor(op_problem.get_objective_scaling_factor() /
-                                          obj_scaling_coefficient);
-  op_problem.set_objective_offset(op_problem.get_objective_offset() * obj_scaling_coefficient);
-
-  CUOPT_LOG_INFO("MIP objective scaling applied: min_abs_coeff=%g scale=%g",
-                 static_cast<double>(min_abs_objective_coefficient),
-                 static_cast<double>(obj_scaling_coefficient));
+  return;
 }
 
 template <typename i_t, typename f_t>