+The first line is the header - you must include it.
+The following line means that the code between two consecutive MPI calls on
+line 30 in exchange_1.f and line 130 in exchange_1.f should receive a speedup
+of 1.18244559422142. The value for the second column is therefore a speedup, if it is
+larger than 1 and a slow-down if it is smaller than 1. Nothing will be changed if it is
+equal to 1.
+
+Of course, you can set any arbitrary filenames you want (so the start and end don't have to be
+in the same file), but be aware that this mechanism only supports @em consecutive calls!
+
+\note
+ Please note that you must pass the \b -trace-call-location flag to smpicc
+ or smpiff, respectively! This flag activates some macro definitions in our
+ mpi.h / mpi.f files that help with obtaining the call location.
+
+\subsection options_model_smpi_bw_factor smpi/bw-factor: Bandwidth factors