def pruning_loss_sens_magnitude_iter(
model: Union[str, ModelProto],
sparsity_levels: Union[List[float],
Tuple[float,
...]] = default_pruning_sparsities_loss(True),
) -> Generator[Tuple[PruningLossSensitivityAnalysis, KSSensitivityProgress],
None, None]:
"""
Approximated kernel sparsity (pruning) loss analysis for a given model.
Iteratively builds a KSLossSensitivityAnalysis object and yields an updated
version after each layer is run. The final result is the complete
analysis object.
:param model: the loaded model or a file path to the onnx model
to calculate the sparse sensitivity analysis for
:param sparsity_levels: the sparsity levels to calculate the loss for for each param
:return: the analysis results for the model with an additional layer at each
iteration along with a float representing the iteration progress
"""
model = check_load_model(model)
prunable = get_prunable_nodes(model)
analysis = PruningLossSensitivityAnalysis()
num_layers = len(prunable)
for index, node in enumerate(prunable):
node_id = extract_node_id(node)
yield analysis, KSSensitivityProgress(index, node_id, num_layers,
float(index) / float(num_layers))
weight, bias = get_node_params(model, node)
values = numpy.sort(numpy.abs(weight.val.flatten()))
prev_index = 0
for sparsity in sparsity_levels:
val_index = round(sparsity * values.size)
if val_index >= len(values):
val_index = len(values) - 1
if sparsity <= 1e-9:
baseline = True
sparsity = 0.0
sparse_avg = 0.0
else:
baseline = False
if val_index > prev_index:
sparse_avg = values[prev_index:val_index].mean().item()
prev_index = val_index
else:
sparse_avg = values[val_index].item()
prev_index = val_index + 1
analysis.add_result(node_id, weight.name, index, sparsity,
sparse_avg, baseline)
yield analysis, KSSensitivityProgress(num_layers, None, num_layers, 1.0)
def __init__(
self, model: Union[ModelProto, str, None], nodes: List[NodeAnalyzer] = None
):
if model is None and nodes is None:
raise ValueError("model or nodes must not be None")
if model is not None and nodes is not None:
raise ValueError("model or nodes must be None, both cannot be passed")
if model is not None:
model = check_load_model(model)
node_shapes = extract_node_shapes(model)
self._nodes = [
NodeAnalyzer(
model, node, node_shape=node_shapes.get(extract_node_id(node))
)
for node in model.graph.node
]
else:
self._nodes = nodes
def test_get_node_by_id(simple_onnx_model):
for node in simple_onnx_model.graph.node:
node_id = extract_node_id(node)
assert node == get_node_by_id(simple_onnx_model, node_id)
assert get_node_by_id(simple_onnx_model, "NONE") is None
def test_extract_node_id(op_type, inputs, outputs):
node = make_node(op_type, inputs, outputs)
assert extract_node_id(node) == outputs[0]
def pruning_loss_sens_one_shot_iter(
model: Union[str, ModelProto],
data: DataLoader,
batch_size: int,
steps_per_measurement: int,
sparsity_levels: List[float] = default_pruning_sparsities_loss(False),
use_deepsparse_inference: bool = False,
) -> Generator[Tuple[PruningLossSensitivityAnalysis, KSSensitivityProgress],
None, None]:
"""
Run a one shot sensitivity analysis for kernel sparsity.
It does not retrain.
Moves layer by layer to calculate the sensitivity analysis for each and
resets the previously run layers.
Updates and yeilds the KSLossSensitivityAnalysis at each layer.
The loss is calculated by taking the kl_divergence of
pruned values from the baseline.
:param model: the loaded model or a file path to the onnx model
to calculate the sparse sensitivity analysis for
:param data: the data to run through the model
:param batch_size: the batch size the data is created for
:param steps_per_measurement: number of steps (batches) to run through
the model for each sparsity level on each node
:param sparsity_levels: the sparsity levels to calculate the loss for for each param
:param use_deepsparse_inference: True to use the DeepSparse inference engine
to run the analysis, False to use onnxruntime
:return: the sensitivity results for every node that is prunable,
yields update at each layer along with iteration progress
"""
model = check_load_model(model)
prunable_nodes = get_prunable_nodes(model)
analysis = PruningLossSensitivityAnalysis()
num_updates = len(prunable_nodes) * len(sparsity_levels) + 1
update_num = 0
yield analysis, KSSensitivityProgress(update_num, None, num_updates, 0.0)
runner = (ORTModelRunner(model) if not use_deepsparse_inference else
DeepSparseModelRunner(model, batch_size))
_LOGGER.debug("created runner for one shot analysis {}".format(runner))
base_outputs, _ = runner.run(
data,
desc="",
show_progress=False,
max_steps=steps_per_measurement,
)
_LOGGER.debug("recorded base outputs")
del runner
for index, node in enumerate(prunable_nodes):
node_id = extract_node_id(node)
weight, bias = get_node_params(model, node)
_LOGGER.debug("running one shot for node {}".format(node_id))
for sparsity in sparsity_levels:
update_num += 1
yield analysis, KSSensitivityProgress(
update_num,
{
"node_id": node_id,
"sparsity": sparsity
},
num_updates,
float(update_num) / float(num_updates),
)
prune_model_one_shot(model, [node], sparsity)
_LOGGER.debug(
"created one shot pruned model for sparsity {}".format(
sparsity))
runner = (ORTModelRunner(model) if not use_deepsparse_inference
else DeepSparseModelRunner(model, batch_size))
_LOGGER.debug(
"created runner for one shot analysis {}".format(runner))
pruned_outputs, _ = runner.run(
data,
desc="",
show_progress=False,
max_steps=steps_per_measurement,
)
del runner
_LOGGER.debug("recorded outputs")
for base, pruned in zip(base_outputs, pruned_outputs):
batch_losses = []
for key, base_array in base.items():
pruned_array = pruned[key]
loss = kl_divergence(
pruned_array,
base_array,
min(base_array.min(), pruned_array.min()),
)
batch_losses.append(loss)
analysis.add_result(
node_id,
weight.name,
index,
sparsity,
sum(batch_losses),
baseline=sparsity < 1e-9,
)
# reset node to its baseline density
update_model_param(model, weight.name, weight.val)
yield analysis, KSSensitivityProgress(num_updates, None, num_updates, 1.0)
def __init__(
self,
model: Union[ModelProto, None],
node: Union[Any, None],
node_shape: Union[NodeShape, None] = None,
**kwargs,
):
if model is None and node is None:
self._id = kwargs["id"]
self._op_type = kwargs["op_type"]
self._input_names = kwargs["input_names"]
self._output_names = kwargs["output_names"]
self._input_shapes = kwargs["input_shapes"]
self._output_shapes = kwargs["output_shapes"]
self._params = kwargs["params"]
self._prunable = kwargs["prunable"]
self._prunable_params_zeroed = kwargs["prunable_params_zeroed"]
self._weight_name = kwargs["weight_name"]
self._weight_shape = kwargs["weight_shape"]
self._bias_name = kwargs["bias_name"]
self._bias_shape = kwargs["bias_shape"]
self._attributes = kwargs["attributes"]
self._flops = kwargs["flops"]
self._prunable_equation_sensitivity = (
kwargs["prunable_equation_sensitivity"]
if "prunable_equation_sensitivity" in kwargs
else None
)
return
if model is None or node is None:
raise ValueError("both model and node must not be None")
self._id = extract_node_id(node)
self._op_type = node.op_type
self._input_names = get_node_inputs(model, node)
self._output_names = get_node_outputs(model, node)
if node_shape is None:
self._input_shapes = None
self._output_shapes = None
else:
self._input_shapes = node_shape.input_shapes
self._output_shapes = node_shape.output_shapes
self._params = 0
self._prunable = is_prunable_node(model, node)
self._prunable_params = 0
self._prunable_params_zeroed = 0
self._weight_name = None
self._weight_shape = None
self._bias_name = None
self._bias_shape = None
self._attributes = get_node_attributes(node)
if self._prunable:
weight, bias = get_node_params(model, node)
self._params += weight.val.size
self._prunable_params += weight.val.size
self._prunable_params_zeroed += weight.val.size - numpy.count_nonzero(
weight.val
)
self._weight_name = weight.name
self._weight_shape = [s for s in weight.val.shape]
if bias is not None:
self._bias_name = bias.name
self._params += bias.val.size
self._bias_shape = [s for s in bias.val.shape]
kernel_shape = get_kernel_shape(self._attributes)
self._flops = calculate_flops(
self._op_type,
input_shape=self._input_shapes,
output_shape=self._output_shapes,
weight_shape=self._weight_shape,
kernel_shape=kernel_shape,
bias_shape=self._bias_shape,
attributes=self._attributes,
)
self._prunable_equation_sensitivity = (
pruning_loss_sens_approx(
self._input_shapes,
self._output_shapes,
self._params,
apply_shape_change_mult=True,
)
if self._prunable
else None
)