title: perf report showing "__libm_pow_l9"
body: <p>I am using perf to profile my program, which involves loads of use of exp() and pow(). The code was compiled use </p>
  
  <pre><code>icc  -g -fno-omit-frame-pointer test.c
  </code></pre>
  
  <p>and profiled with:</p>
  
  <pre><code>perf record -g ./a.out
  </code></pre>
  
  <p>which is followed by:</p>
  
  <pre><code>perf report -g 'graph,0.5,caller'
  </code></pre>
  
  <p>and perf gave:</p>
  
  <p><a href="https://i.stack.imgur.com/LcGWZ.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/LcGWZ.png" alt="enter image description here"></a></p>
  
  <p>the two functions __libm_exp_l9() and  __libm_pow_l9() are consuming considerable amount of computational power. </p>
  
  <p>So I am wondering if they are just alias to exp() and pow(), respectively? Or any suggestions to read in the report here?
  Thanks.</p>