Is there cudnnLSTM or cudNNGRU alternative in tensorflow 2.0

Question

The CuDNNGRU in TensorFlow 1.0 is really fast. But when I shifted to TensorFlow 2.0 i am unable to find CuDNNGRU. Simple GRU is really slow in TensorFlow 2.0.

Is there any way to use CuDNNGRU in TensorFlow 2.0?

Answer 1

The importable implementations have been deprecated - instead, LSTM and GRU will default to CuDNNLSTM and CuDNNGRU if all conditions are met:

1. activation = 'tanh'
2. recurrent_activation = 'sigmoid'
3. recurrent_dropout = 0
4. unroll = False
5. use_bias = True
6. Inputs, if masked, are strictly right-padded
7. reset_after = True (GRU only)

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Also ensure TensorFlow uses GPU:

import tensorflow as tf
from tensorflow.python.client import device_lib
print(device_lib.list_local_devices())
print('Default GPU Device: {}'.format(tf.test.gpu_device_name()))

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Update: there appears to be a problem w/ TF 2.0.0 when running on Colab in getting CuDNN to work; try !pip install tensorflow==2.1.0 instead.