title: What does "perf stat" output mean?
body: <p>I use "<code>perf stat</code>" command to do a statistic of some events:   </p>
  
  <pre><code>[root@root test]# perf stat -a -e "r81d0","r82d0" -v ./a
  r81d0: 71800964 1269047979 1269006431
  r82d0: 26655201 1284214869 1284214869
  
   Performance counter stats for './a':
  
          71,800,964 r81d0                                                        [100.00%]
          26,655,201 r82d0
  
         0.036892349 seconds time elapsed
  </code></pre>
  
  <p>(1) I know <code>71800964</code> is the count of "<code>r81d0</code>", but what is the meaning of <code>1269047979</code> and <code>1269006431</code>?<br>
  (2) What is the meaning of "<code>[100.00%]</code>"?  </p>
  
  <p>I have tried to "<code>perf stat --help</code>", but can't get the explanations of these values.</p>