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<p>There are known non-determinism issues for RNN functions on some versions of cuDNN and CUDA.
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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>
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