title: How to get the size of the CPU cache in Linux
body: <p>I have executed the following query:</p>
  <pre><code>free -m
  </code></pre>
  <p>And output of this command is:</p>
  <pre><code>           total       used       free     shared    buffers     cached
  Mem:        2048       2018         29          5          0       595
  </code></pre>
  <p>I want to get the size of the CPU cache. Is it possible to get the size of the cache and also what is the use of the cache here?</p>