Answers for "tensorflow how to know if gpu is working"

check if tensorflow gpu is installed

import tensorflow as tf
print(tf.test.gpu_device_name())

check gpu in tensorflow

# For tensorflow 2:
print("Num GPUs Available: ", len(tf.config.list_physical_devices('GPU')))

# For tensorflow 1:
sess = tf.Session(config=tf.ConfigProto(log_device_placement=True))

tensorflow cant see gpu

$ pip uninstall tensorflow
$ pip install tensorflow-gpu