Verilator_profcfunc reads a profile report created by gprof. The names of the functions are then transformed, assuming the user used Verilator’s –prof-cfuncs, and a report printed showing the percentage of the time, etc., in each Verilog block.
Due to rounding errors in gprof reports, the input report’s percentages may not total 100%. In the verilator_profcfunc report this will get reported as a rounding error.
For an overview of the use of verilator_profcfunc, see Code Profiling.