title: perf tool output, magic values
body: <p>I ran perf with the parameter -x to print in machine readable format. The output is as follows:</p>
  
  <pre><code>1285831153,,instructions,1323535732,100.00
  7332248,,branch-misses,1323535732,100.00
  1316.587352,,cpu-clock,1316776510,100.00
  1568113343,,cycles,1323535732,100.00
  </code></pre>
  
  <p>the first number is clear but then the values after the descriptions are not clear to me. Is the first one behind the description the runtime? Then why is it different? What does the 100.00 mean at the end of each line? It is not documented; I looked it up here: <a href="https://perf.wiki.kernel.org/index.php/Tutorial#Machine_readable_output" rel="nofollow noreferrer">https://perf.wiki.kernel.org/index.php/Tutorial#Machine_readable_output</a></p>