title: AWS EC2: The number of cpu cores available on an instance
body: <p>I have recently set up an instance (m4.4xlarge).</p>
  
  <p>when I execute '<code>lscpu</code>' command, the output looks something like the following:</p>
  
  <pre><code>CPU op-mode(s):        32-bit, 64-bit
  Byte Order:            Little Endian
  CPU(s):                16
  On-line CPU(s) list:   0-15
  Thread(s) per core:    2
  Core(s) per socket:    8
  CPU socket(s):         1
        .
        .
        .
  </code></pre>
  
  <p>Does this mean that only 8 cores can be utilized?</p>
  
  <p>If so, what are the rest of CPUs for?</p>