# tf.contrib.nccl.reduce_sum

tf.contrib.nccl.reduce_sum(tensors)


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.