title: Tensorflow: Retraining inception v3 shows 0 % GPU usage
body: <p>I am currently trying out Tensorflow's inception model and while it does use the GPU for bottlenecks generation, it doesn't seem to do anything on it training-wise.</p>
  
  <ul>
  <li>GPU usage is monitored through <code>nvidia-smi</code>, it stays at 0%</li>
  <li>log_device_placement returns gpu:0 for about 80% of operation so it seems fine.</li>
  <li>At the beginning it does detect my Titan X with the usual <code>/job:localhost/replica:0/task:0/gpu:0 -&gt; device: 0, name: TITAN X (Pascal), pci bus id: 0000:01:00.0</code></li>
  <li>The memory on the GPU is allocated</li>
  <li>CUDA is installed and so is cuDNN both last version</li>
  <li>The temperature does rise (about 20 celsius 40->60) but it could be the CPU heating the whole case?</li>
  </ul>