Tensorflow设置显存自适应，显存比例

1. 按比例

 config = tf.ConfigProto()
 config.gpu_options.per_process_gpu_memory_fraction = 0.4
 session = tf.Session(config=config, ...)

or

     session_bundle_config.mutable_session_config()
         ->mutable_gpu_options()
         ->set_per_process_gpu_memory_fraction(0.4);

2.按需求增长

 config = tf.ConfigProto()
 config.gpu_options.allow_growth = True
 session = tf.Session(config=config, ...)

or

     session_bundle_config.mutable_session_config()
         ->mutable_gpu_options()
         ->set_allow_growth(true);