tpu_trainer_lib.py 文件源码

def create_session_config(log_device_placement=False,
                          enable_graph_rewriter=False,
                          gpu_mem_fraction=0.95,
                          use_tpu=False):
  """The TensorFlow Session config to use."""
  if use_tpu:
    graph_options = tf.GraphOptions()
  else:
    if enable_graph_rewriter:
      rewrite_options = rewriter_config_pb2.RewriterConfig()
      rewrite_options.optimizers.append("pruning")
      rewrite_options.optimizers.append("constfold")
      rewrite_options.optimizers.append("arithmetic")
      rewrite_options.optimizers.append("layout")
      graph_options = tf.GraphOptions(rewrite_options=rewrite_options)
    else:
      graph_options = tf.GraphOptions(
          optimizer_options=tf.OptimizerOptions(
              opt_level=tf.OptimizerOptions.L1, do_function_inlining=False))

  gpu_options = tf.GPUOptions(per_process_gpu_memory_fraction=gpu_mem_fraction)

  config = tf.ConfigProto(
      allow_soft_placement=True,
      graph_options=graph_options,
      gpu_options=gpu_options,
      log_device_placement=log_device_placement)
  return config