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Fix gradient of nccl_ops #20360

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Merged
yifeif merged 1 commit into from
Jul 3, 2018
Merged

Fix gradient of nccl_ops #20360

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6 changes: 3 additions & 3 deletions tensorflow/contrib/nccl/python/ops/nccl_ops.py
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Original file line number Diff line number Diff line change
Expand Up @@ -63,12 +63,12 @@ def _all_sum_grad(op, grad):
Raises:
LookupError: If `reduction` is not `sum`.
"""
if op.get_attr('reduction') != 'sum':
if op.get_attr('reduction') != b'sum':
raise LookupError('No gradient defined for NcclAllReduce except sum.')

_check_device(grad, expected=op.device)
num_devices = op.get_attr('num_devices')
shared_name = op.get_attr('shared_name') + '_grad'
shared_name = op.get_attr('shared_name') + b'_grad'

with ops.device(op.device):
return gen_nccl_ops.nccl_all_reduce(
Expand Down Expand Up @@ -162,7 +162,7 @@ def _reduce_sum_grad(op, grad):
Raises:
LookupError: If the reduction attribute of op is not `sum`.
"""
if op.get_attr('reduction') != 'sum':
if op.get_attr('reduction') != b'sum':
raise LookupError('No gradient defined for NcclReduce except sum.')
_check_device(grad, expected=op.device)

Expand Down