title: Android : PSS (Proportional Set Size) Calculation
body: <p>I am trying to figure out how the PSS is calculated is Android.</p>
  
  <p>I found one <a href="http://lkml.indiana.edu/hypermail/linux/kernel/0708.1/3930.html" rel="noreferrer">article</a> that states the following.</p>
  
  <blockquote>
    <p>The "proportional set size" (PSS) of a process is the count of pages
    it has in memory, where each page is divided by the number of
    processes sharing it. So if a process has 1000 pages all to itself,
    and 1000 shared with one other process, its PSS will be 1500</p>
  </blockquote>
  
  <p>My first question is, is the above information accurate ? If not, could someone tell me how it is really calculated ?</p>
  
  <p>Also, is this value is kilobytes or is "PSS" a unit by itself ?</p>