title: Multicore processor core communication speeds
body: <p>I would look to find the speed of communication between the two cores of a computer.  </p>
  
  <p>I'm in the very early stages of planning to massively parallelise a sequential program and I need to think about network communication speeds vs. communication between cores on a single processor.  </p>
  
  <p>Ubuntu linux probably provides some way of seeing this sort of information?  I would have thought speed fluctuates.. I just need some average value.  I'm basically needing to write something up at the moment and it would be good to talk about these ratios.</p>
  
  <p>Any ideas?</p>
  
  <p>Thanks.</p>