title: C, 2 events and timing question
body: <p>I will fork 3 threads,
  One for event A, another for event B, third one for timing.</p>
  
  <p>I will run A in every 3.2 sec, run B in every 1.7 sec. </p>
  
  <p>My thought is in thread 3, at proper time, I call A or B.</p>
  
  <p>Is this logic right? 
  Will the calling of A and B in thread 3 influence timing ?</p>
  
  <p>Thanks</p>