title: Which cache mapping technique is used in intel core i7 processor?
body: <p>I have learned about different cache mapping techniques like direct mapping and fully associative or set associative mapping, and the trade-offs between those.  (<a href="https://en.wikipedia.org/wiki/Cache_placement_policies" rel="noreferrer">Wikipedia</a>)</p>
  <p>But I am curious which one is used in Intel core i7 or AMD processors nowadays?</p>
  <p>How have the techniques evolved? And what are things that need to be improved?</p>