title: Open-source OpenGL profiler for Linux
body: <p>The title sums my question up pretty well: are there any <em>open source</em> OpenGL profilers for Linux?</p>
  
  <p>The only thing I could find was <a href="http://www.gremedy.com/gDEBuggerLinux.php" rel="noreferrer">gDEBugger</a>, but it only comes with a 7 day trial and is very much closed source. I would use this for free (as in freedom) software development so paying is not an option, though I might consider accept answers for a free (as in beer) but closed application. Bonus points if it works with open source drivers (my main computer has an integrated Intel graphics card).</p>