1 files changed, 18 insertions, 0 deletions
diff --git a/include/ceres/iteration_callback.h b/include/ceres/iteration_callback.h
index 57cf0a6..987c2d9 100644
--- a/include/ceres/iteration_callback.h
+++ b/include/ceres/iteration_callback.h
@@ -52,6 +52,10 @@ struct IterationSummary {
         gradient_max_norm(0.0),
         step_norm(0.0),
         eta(0.0),
+        step_size(0.0),
+        line_search_function_evaluations(0),
+        line_search_gradient_evaluations(0),
+        line_search_iterations(0),
         linear_solver_iterations(0),
         iteration_time_in_seconds(0.0),
         step_solver_time_in_seconds(0.0),
@@ -116,10 +120,24 @@ struct IterationSummary {
   // ignore it.
   double eta;
 
+  // Step sized computed by the line search algorithm.
+  double step_size;
+
+  // Number of function value evaluations used by the line search algorithm.
+  int line_search_function_evaluations;
+
+  // Number of function gradient evaluations used by the line search algorithm.
+  int line_search_gradient_evaluations;
+
+  // Number of iterations taken by the line search algorithm.
+  int line_search_iterations;
+
   // Number of iterations taken by the linear solver to solve for the
   // Newton step.
   int linear_solver_iterations;
 
+  // All times reported below are wall times.
+
   // Time (in seconds) spent inside the minimizer loop in the current
   // iteration.
   double iteration_time_in_seconds;