def _check_and_update_gradient(params_grads, loss_scaling, dist_context):
main_block = paddle.static.default_main_program().global_block()
main_block._sync_with_cpp()
grads = [g for _, g in params_grads]
check_type(grads, 'x', (tuple, list), 'check_finite_and_unscale')
for e in grads:
check_variable_and_dtype(e, "x", ['float16', 'float32', 'float64'],
'check_finite_and_unscale')
found_inf = main_block.create_var(
name=unique_name.generate_with_ignorable_key(".".join(
['find_infinite_scale', 'tmp'])),
shape=[1],
dtype='bool',
type=core.VarDesc.VarType.LOD_TENSOR,
persistable=False,
stop_gradient=False)
set_var_dist_attr(dist_context, found_inf, [-1], world_process_group.ranks)
inputs = {'X': grads, 'Scale': loss_scaling}
outputs = {'Out': grads, 'FoundInfinite': found_inf}
attrs = {'op_role': OpRole.Backward}
new_op = main_block.append_op(type='check_finite_and_unscale',
inputs=inputs,
outputs=outputs,
attrs=attrs)
new_op_dist_attr = OperatorDistributedAttribute()
new_op_dist_attr.process_mesh = world_process_group.ranks
new_op_dist_attr.impl_idx = 0
if len(world_process_group.ranks) > 1:
new_op_dist_attr.impl_type = "check_finite_and_unscale"
for g in grads:
g_dist_attr = dist_context.get_tensor_dist_attr_for_program(g)
assert g_dist_attr is not None
new_op_dist_attr.set_input_dims_mapping(g.name,
g_dist_attr.dims_mapping)
new_op_dist_attr.set_output_dims_mapping(g.name,
g_dist_attr.dims_mapping)
dist_context.set_op_dist_attr_for_program(new_op, new_op_dist_attr)
return grads, found_inf
def set_op_dist_attr(self, op, old_dist_attr, var_name_dict):
new_dist_attr = OperatorDistributedAttribute()
new_dist_attr.is_recompute = True
new_dist_attr.impl_idx = old_dist_attr.impl_idx
new_dist_attr.impl_type = old_dist_attr.impl_type
new_dist_attr.process_mesh = old_dist_attr.process_mesh
for input in old_dist_attr.inputs_dist_attrs.keys():
if input in var_name_dict.keys():
in_dist_attr = old_dist_attr.inputs_dist_attrs[input]
new_dist_attr.set_input_dist_attr(var_name_dict[input],
in_dist_attr)
else:
in_dist_attr = old_dist_attr.inputs_dist_attrs[input]
new_dist_attr.set_input_dist_attr(input, in_dist_attr)
for output in old_dist_attr.outputs_dist_attrs.keys():
if output in var_name_dict.keys():
out_dist_attr = old_dist_attr.outputs_dist_attrs[output]
new_dist_attr.set_output_dist_attr(var_name_dict[output],
out_dist_attr)
else:
out_dist_attr = old_dist_attr.outputs_dist_attrs[output]
new_dist_attr.set_output_dist_attr(output, out_dist_attr)
self._dist_context.set_op_dist_attr_for_program(op, new_dist_attr)
def _update_loss_scaling(self, grads, found_inf):
main_block = paddle.static.default_main_program().global_block()
main_block._sync_with_cpp()
check_variable_and_dtype(self._loss_scaling, "prev_loss_scaling",
['float32', 'float64'], "update_loss_scaling")
check_type(grads, 'x', (tuple, list), 'update_loss_scaling')
for e in grads:
check_variable_and_dtype(e, "x", ['float16', 'float32', 'float64'],
'update_loss_scaling')
if e.dtype == core.VarDesc.VarType.FP16:
assert self._loss_scaling.dtype == core.VarDesc.VarType.FP32, \
"The dtype of prev_loss_scaling should be float32 when the dtype of x is float16."
else:
assert self._loss_scaling.dtype == e.dtype, "The dtype of prev_loss_scaling should be equal to the dtype of x."
inputs = {
'X': grads,
'FoundInfinite': found_inf,
'PrevLossScaling': self._loss_scaling,
'InGoodSteps': self._num_good_steps,
'InBadSteps': self._num_bad_steps
}
outputs = {
'Out': grads,
'LossScaling': self._loss_scaling,
'OutGoodSteps': self._num_good_steps,
'OutBadSteps': self._num_bad_steps
}
attrs = {
'incr_every_n_steps': self.get_attr("incr_every_n_steps"),
'decr_every_n_nan_or_inf':
self.get_attr("decr_every_n_nan_or_inf"),
'incr_ratio': self.get_attr("incr_ratio"),
'decr_ratio': self.get_attr("decr_ratio"),
'stop_update': self.get_attr("stop_update"),
'op_role': OpRole.Backward
}
new_op = main_block.append_op(type='update_loss_scaling',
inputs=inputs,
outputs=outputs,
attrs=attrs)
new_op_dist_attr = OperatorDistributedAttribute()
new_op_dist_attr.process_mesh = world_process_group.ranks
new_op_dist_attr.impl_idx = 0
if len(world_process_group.ranks) > 1:
new_op_dist_attr.impl_type = "update_loss_scaling"
for g in grads:
g_dist_attr = self.dist_context.get_tensor_dist_attr_for_program(g)
assert g_dist_attr is not None
new_op_dist_attr.set_input_dims_mapping(g.name,
g_dist_attr.dims_mapping)
new_op_dist_attr.set_output_dims_mapping(g.name,
g_dist_attr.dims_mapping)
self.dist_context.set_op_dist_attr_for_program(new_op,
new_op_dist_attr)
main_block._sync_with_cpp()