tf.contrib.nccl.reduce_sum(tensors)
Defined in tensorflow/contrib/nccl/python/ops/nccl_ops.py.
Returns a tensor with the reduce sum across tensors.
The computation is done with a reduce operation, so only one tensor is returned.
Args:
tensors: The input tensors across which to sum; must be assigned to GPU devices.
Returns:
A tensor containing the sum of the input tensors.
Raises:
LookupError: If context is not currently using a GPU device.