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.. warning::
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:
On CUDA 10.1, set environment variable ``CUDA_LAUNCH_BLOCKING=1``.
This may affect performance.
On CUDA 10.2 or later, set environment variable
(note the leading colon symbol)
``CUBLAS_WORKSPACE_CONFIG=:16:8``
or
``CUBLAS_WORKSPACE_CONFIG=:4096:2``.
See the `cuDNN 8 Release Notes`_ for more information.
.. _cuDNN 8 Release Notes: https://docs.nvidia.com/deeplearning/sdk/cudnn-release-notes/rel_8.html
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