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<div class="admonition warning">
<p class="admonition-title">Warning</p>
<p>There are known non-determinism issues for RNN functions on some versions of cuDNN and CUDA.
You can enforce deterministic behavior by setting the following environment variables:</p>
<p>On CUDA 10.1, set environment variable <code class="docutils literal notranslate"><span class="pre">CUDA_LAUNCH_BLOCKING=1</span></code>.
This may affect performance.</p>
<p>On CUDA 10.2 or later, set environment variable
(note the leading colon symbol)
<code class="docutils literal notranslate"><span class="pre">CUBLAS_WORKSPACE_CONFIG=:16:8</span></code>
or
<code class="docutils literal notranslate"><span class="pre">CUBLAS_WORKSPACE_CONFIG=:4096:2</span></code>.</p>
<p>See the <a class="reference external" href="https://docs.nvidia.com/deeplearning/sdk/cudnn-release-notes/rel_8.html">cuDNN 8 Release Notes</a> for more information.</p>
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