How to use multi-gpus?

[flytoylf]

As shown in the figure above, I want to use multi gpus to run my job. But it has error like as follow:

Traceback (most recent call last):
File "/data/yangxiaohan/tool/python3.6/lib/python3.6/site-packages/tensorflow/python/training/coordinator.py", line 297, in stop_on_exception
yield
File "/data/yangxiaohan/tool/python3.6/lib/python3.6/site-packages/tensorflow/contrib/distribute/python/mirrored_strategy.py", line 177, in _call_for_each_tower
**merge_kwargs)
File "/data/yangxiaohan/tool/python3.6/lib/python3.6/site-packages/tensorflow/python/training/checkpoint_utils.py", line 193, in _init_from_checkpoint
ckpt_file = _get_checkpoint_filename(ckpt_dir_or_file)
File "/data/yangxiaohan/tool/python3.6/lib/python3.6/site-packages/tensorflow/python/training/checkpoint_utils.py", line 280, in _get_checkpoint_filename
if gfile.IsDirectory(ckpt_dir_or_file):
File "/data/yangxiaohan/tool/python3.6/lib/python3.6/site-packages/tensorflow/python/lib/io/file_io.py", line 467, in is_directory
return pywrap_tensorflow.IsDirectory(compat.as_bytes(dirname), status)
File "/data/yangxiaohan/tool/python3.6/lib/python3.6/site-packages/tensorflow/python/util/compat.py", line 61, in as_bytes
(bytes_or_text,))
TypeError: Expected binary or unicode string, got PerDevice({'/replica:0/task:0/device:GPU:0': '/data/yangxiaohan/.eztransfer_modelzoo/bert/google-bert-base-zh/model.ckpt', '/replica:0/task:0/device:GPU:1': '/data/yangxiaohan/.eztransfer_modelzoo/bert/google-bert-base-zh/model.ckpt'})
Traceback (most recent call last):
File "src/fit.py", line 179, in
tf.app.run()
File "/data/yangxiaohan/tool/python3.6/lib/python3.6/site-packages/tensorflow/python/platform/app.py", line 125, in run
_sys.exit(main(argv))
File "src/fit.py", line 168, in main
train()
File "src/fit.py", line 24, in train
app.run_train(reader=train_reader)
File "/data/yangxiaohan/tool/python3.6/lib/python3.6/site-packages/easytransfer/engines/model.py", line 616, in run_train
max_steps=self.train_steps)
File "/data/yangxiaohan/tool/python3.6/lib/python3.6/site-packages/tensorflow/python/estimator/estimator.py", line 354, in train
loss = self._train_model(input_fn, hooks, saving_listeners)
File "/data/yangxiaohan/tool/python3.6/lib/python3.6/site-packages/tensorflow/python/estimator/estimator.py", line 1205, in _train_model
return self._train_model_distributed(input_fn, hooks, saving_listeners)
File "/data/yangxiaohan/tool/python3.6/lib/python3.6/site-packages/tensorflow/python/estimator/estimator.py", line 1316, in _train_model_distributed
self.config)
File "/data/yangxiaohan/tool/python3.6/lib/python3.6/site-packages/tensorflow/python/training/distribute.py", line 721, in call_for_each_tower
return self._call_for_each_tower(fn, *args, **kwargs)
File "/data/yangxiaohan/tool/python3.6/lib/python3.6/site-packages/tensorflow/contrib/distribute/python/mirrored_strategy.py", line 556, in _call_for_each_tower
return _call_for_each_tower(self, fn, *args, **kwargs)
File "/data/yangxiaohan/tool/python3.6/lib/python3.6/site-packages/tensorflow/contrib/distribute/python/mirrored_strategy.py", line 183, in _call_for_each_tower
coord.join(threads)
File "/data/yangxiaohan/tool/python3.6/lib/python3.6/site-packages/tensorflow/python/training/coordinator.py", line 389, in join
six.reraise(*self._exc_info_to_raise)
File "/data/yangxiaohan/tool/python3.6/lib/python3.6/site-packages/six.py", line 693, in reraise
raise value
File "/data/yangxiaohan/tool/python3.6/lib/python3.6/site-packages/tensorflow/python/training/coordinator.py", line 297, in stop_on_exception
yield
File "/data/yangxiaohan/tool/python3.6/lib/python3.6/site-packages/tensorflow/contrib/distribute/python/mirrored_strategy.py", line 177, in _call_for_each_tower
**merge_kwargs)
File "/data/yangxiaohan/tool/python3.6/lib/python3.6/site-packages/tensorflow/python/training/checkpoint_utils.py", line 193, in _init_from_checkpoint
ckpt_file = _get_checkpoint_filename(ckpt_dir_or_file)
File "/data/yangxiaohan/tool/python3.6/lib/python3.6/site-packages/tensorflow/python/training/checkpoint_utils.py", line 280, in _get_checkpoint_filename
if gfile.IsDirectory(ckpt_dir_or_file):
File "/data/yangxiaohan/tool/python3.6/lib/python3.6/site-packages/tensorflow/python/lib/io/file_io.py", line 467, in is_directory
return pywrap_tensorflow.IsDirectory(compat.as_bytes(dirname), status)
File "/data/yangxiaohan/tool/python3.6/lib/python3.6/site-packages/tensorflow/python/util/compat.py", line 61, in as_bytes
(bytes_or_text,))
TypeError: Expected binary or unicode string, got PerDevice({'/replica:0/task:0/device:GPU:0': '/data/yangxiaohan/.eztransfer_modelzoo/bert/google-bert-base-zh/model.ckpt', '/replica:0/task:0/device:GPU:1': '/data/yangxiaohan/.eztransfer_modelzoo/bert/google-bert-base-zh/model.ckpt'})