Profiling C and Fortran Code with gprof
=======================================

Author: Momchil Ivanov <momchil@xaxo.eu>
Date  : 2014.10.02

Introduction
------------

  This article contains notes on how to profile C and Fortran code
  with gprof.

Requirements
------------

  - gprof2dot.py from [1]
  - python
  - graphviz

Howto
-----

  1. Compile program with profiling.
  2. Run program, the profiler generates a file gmon.out.
  3. To generate a call tree from the profiling statistic use:

    $ gprof a.out | gprof2dot.py | dot -Tpng -oa.png

  where a.out is the program, a.png is the output graphic
  representation of the call tree containing the relevant statistic
  information as numbers and color code: red means more time, blue
  means less.

Compiling with gcc
------------------

  Compile your program with "-pg".

Compiling with ifort
--------------------

  Compile your program with "-pg".

References
----------

1: https://code.google.com/p/jrfonseca/wiki/Gprof2Dot