title: How to explain this figure about `nvidia-smi` with NVIDIA GPUs?
body: <p>I have just run the <code>simpleMultiGPU</code> in a server with two <code>K20m</code> GPUs installed. And then run the <code>nvidia-smi</code> command to show the status of the GPUs. The result is as follows:</p>
  
  <p><img src="https://i.stack.imgur.com/uvbw8.jpg" alt="enter image description here"></p>
  
  <p>The problems are as follows:</p>
  
  <ol>
  <li>the GPU Memory Usage seems to be not the same.</li>
  <li>the Volatile GPU-Util of <code>device 1</code> is 99%.</li>
  </ol>
  
  <p>Any advice?</p>