feat: Enable rewrite parameterisation for specific rewrites

Adds support for rewrite-specific parameters

Resolves: MLIA-1114

Signed-off-by: Nathan Bailey <nathan.bailey@arm.com>
Change-Id: I290c326af3356033a916a43b28027819c876c3dd

4 files changed, 99 insertions, 46 deletions

diff --git a/src/mlia/nn/rewrite/core/rewrite.py b/src/mlia/nn/rewrite/core/rewrite.py
index 6d915c6..78fa533 100644
--- a/src/mlia/nn/rewrite/core/rewrite.py
+++ b/src/mlia/nn/rewrite/core/rewrite.py
@@ -8,6 +8,7 @@ import tempfile
 from abc import ABC
 from abc import abstractmethod
 from dataclasses import dataclass
+from inspect import getfullargspec
 from pathlib import Path
 from typing import Any
 from typing import Callable
@@ -36,7 +37,7 @@ from mlia.nn.tensorflow.config import TFLiteModel
 from mlia.utils.registry import Registry
 
 logger = logging.getLogger(__name__)
-RewriteCallable = Callable[[Any, Any], keras.Model]
+RewriteCallable = Callable[..., keras.Model]
 
 
 class Rewrite(ABC):
@@ -47,10 +48,23 @@ class Rewrite(ABC):
         self.name = name
         self.function = rewrite_fn
 
-    def __call__(self, input_shape: Any, output_shape: Any) -> keras.Model:
-        """Return an instance of the rewrite model."""
+    def __call__(
+        self, input_shape: Any, output_shape: Any, **kwargs: Any
+    ) -> keras.Model:
+        """Perform the rewrite operation using the configured function."""
         try:
-            return self.function(input_shape, output_shape)
+            return self.function(input_shape, output_shape, **kwargs)
+        except TypeError as ex:
+            expected_args = getfullargspec(self.function).args
+            if "input_shape" in expected_args:
+                expected_args.remove("input_shape")
+            if "output_shape" in expected_args:
+                expected_args.remove("output_shape")
+            raise KeyError(
+                f"Found unexpected parameters for rewrite. Expected (sub)set "
+                f"of {expected_args} found unexpected parameter(s) "
+                f"{list(set(list(kwargs.keys())) - set(expected_args))}"
+            ) from ex
         except Exception as ex:
             raise RuntimeError(f"Rewrite '{self.name}' failed.") from ex
 
@@ -67,7 +81,7 @@ class Rewrite(ABC):
         """Return post-processing rewrite option."""
 
     @abstractmethod
-    def check_optimization(self, model: keras.Model, **kwargs: dict) -> bool:
+    def check_optimization(self, model: keras.Model) -> bool:
         """Check if the optimization has produced the correct result."""
 
 
@@ -86,7 +100,7 @@ class GenericRewrite(Rewrite):
         """Return default post-processing rewrite option."""
         return model
 
-    def check_optimization(self, model: keras.Model, **kwargs: Any) -> bool:
+    def check_optimization(self, model: keras.Model) -> bool:
         """Not needed here."""
         return True
 
@@ -100,8 +114,8 @@ class QuantizeAwareTrainingRewrite(Rewrite, ABC):
         return model
 
 
-class Sparsity24Rewrite(QuantizeAwareTrainingRewrite):
-    """Rewrite class for sparsity rewrite e.g. fully-connected-sparsity24."""
+class SparsityRewrite(QuantizeAwareTrainingRewrite):
+    """Rewrite class for sparsity rewrite e.g. fully-connected-sparsity."""
 
     pruning_callback = tfmot.sparsity.keras.UpdatePruningStep
 
@@ -132,17 +146,25 @@ class Sparsity24Rewrite(QuantizeAwareTrainingRewrite):
 
         return model
 
-    def check_optimization(self, model: keras.Model, **kwargs: Any) -> bool:
+    def check_optimization(
+        self,
+        model: keras.Model,
+        sparsity_m: int = 2,
+        sparsity_n: int = 4,
+        **_: Any,
+    ) -> bool:
         """Check if sparity has produced the correct result."""
         for layer in model.layers:
             for weight in layer.weights:
                 if "kernel" in weight.name:
                     if "kernel_min" in weight.name or "kernel_max" in weight.name:
                         continue
-                    if not is_pruned_m_by_n(weight, m_by_n=(2, 4)):
+                    if not is_pruned_m_by_n(weight, m_by_n=(sparsity_m, sparsity_n)):
                         logger.warning(
-                            "\nWARNING: Could not find (2,4) sparsity, "
+                            "\nWARNING: Could not find (%d, %d) sparsity, "
                             "in layer %s for weight %s \n",
+                            sparsity_m,
+                            sparsity_n,
                             layer.name,
                             weight.name,
                         )
@@ -164,27 +186,21 @@ class ClusteringRewrite(QuantizeAwareTrainingRewrite):
         )
         return cqat_model
 
-    def check_optimization(self, model: keras.Model, **kwargs: Any) -> bool:
+    def check_optimization(
+        self, model: keras.Model, num_clusters: int = 2, **_: Any
+    ) -> bool:
         """Check if clustering has produced the correct result."""
-        number_of_clusters = kwargs.get("number_of_clusters")
-        if not number_of_clusters:
-            raise ValueError(
-                """
-                Expected check_optimization to have argument number_of_clusters.
-                """
-            )
-
         for layer in model.layers:
             for weight in layer.weights:
                 if "kernel" in weight.name:
                     if "kernel_min" in weight.name or "kernel_max" in weight.name:
                         continue
                     number_of_found_clusters = len(np.unique(weight))
-                    if number_of_found_clusters != number_of_clusters:
+                    if number_of_found_clusters != num_clusters:
                         logger.warning(
                             "\nWARNING: Expected %d cluster(s), found %d "
                             "cluster(s) in layer %s for weight %s \n",
-                            number_of_clusters,
+                            num_clusters,
                             number_of_found_clusters,
                             layer.name,
                             weight.name,
@@ -228,6 +244,7 @@ class RewriteConfiguration(OptimizerConfiguration):
     layers_to_optimize: list[str] | None = None
     dataset: Path | None = None
     train_params: TrainingParameters = TrainingParameters()
+    rewrite_specific_params: dict | None = None
 
     def __str__(self) -> str:
         """Return string representation of the configuration."""
@@ -240,10 +257,10 @@ class RewritingOptimizer(Optimizer):
     registry = RewriteRegistry(
         [
             GenericRewrite("fully-connected", fc_rewrite),
-            Sparsity24Rewrite("fully-connected-sparsity24", fc_sparsity_rewrite),
+            SparsityRewrite("fully-connected-sparsity", fc_sparsity_rewrite),
             ClusteringRewrite("fully-connected-clustering", fc_clustering_rewrite),
             ClusteringRewrite("conv2d-clustering", conv2d_clustering_rewrite),
-            Sparsity24Rewrite("conv2d-sparsity24", conv2d_sparsity_rewrite),
+            SparsityRewrite("conv2d-sparsity", conv2d_sparsity_rewrite),
         ]
     )
 
@@ -265,7 +282,6 @@ class RewritingOptimizer(Optimizer):
         rewrite = RewritingOptimizer.registry.items[
             self.optimizer_configuration.optimization_target
         ]
-
         use_unmodified_model = True
         tflite_model = self.model.model_path
         tfrecord = str(self.optimizer_configuration.dataset)
@@ -287,6 +303,7 @@ class RewritingOptimizer(Optimizer):
             input_tensors=[self.optimizer_configuration.layers_to_optimize[0]],
             output_tensors=[self.optimizer_configuration.layers_to_optimize[1]],
             train_params=self.optimizer_configuration.train_params,
+            rewrite_specific_params=self.optimizer_configuration.rewrite_specific_params,  # pylint: disable=line-too-long
         )
 
         if orig_vs_repl_stats:
diff --git a/src/mlia/nn/rewrite/core/train.py b/src/mlia/nn/rewrite/core/train.py
index 4204978..e99c7e9 100644
--- a/src/mlia/nn/rewrite/core/train.py
+++ b/src/mlia/nn/rewrite/core/train.py
@@ -83,6 +83,7 @@ def train(  # pylint: disable=too-many-arguments
     input_tensors: list,
     output_tensors: list,
     train_params: TrainingParameters = TrainingParameters(),
+    rewrite_specific_params: dict | None = None,
 ) -> Any:
     """Extract and train a model, and return the results."""
     if unmodified_model:
@@ -122,6 +123,7 @@ def train(  # pylint: disable=too-many-arguments
             rewrite=rewrite,
             is_qat=is_qat,
             train_params=train_params,
+            rewrite_specific_params=rewrite_specific_params,
         )
 
         for i, filename in enumerate(tflite_filenames):
@@ -356,6 +358,7 @@ def train_in_dir(
     rewrite: Callable,
     is_qat: bool,
     train_params: TrainingParameters = TrainingParameters(),
+    rewrite_specific_params: dict | None = None,
 ) -> list[str]:
     """Train a replacement for replace.tflite using the input.tfrec \
         and output.tfrec in train_dir.
@@ -396,7 +399,13 @@ def train_in_dir(
     loss_fn = keras.losses.MeanSquaredError()
 
     model = create_model(
-        rewrite, input_shape, output_shape, optimizer, loss_fn, model_is_quantized
+        rewrite,
+        input_shape,
+        output_shape,
+        optimizer,
+        loss_fn,
+        model_is_quantized,
+        rewrite_specific_params=rewrite_specific_params,
     )
 
     logger.info(model.summary())
@@ -462,11 +471,9 @@ def train_in_dir(
         steps_per_epoch,
         post_process=True,
     )
-
-    # Placeholder for now, will be parametrized later (MLIA-1114)
-    # rewrite.check_optimization(  # type: ignore[attr-defined]
-    #     model, number_of_clusters=32
-    # )
+    rewrite.check_optimization(  # type: ignore[attr-defined]
+        model, **rewrite_specific_params if rewrite_specific_params else {}
+    )
     if model_is_quantized and is_qat:
         model = rewrite.preserved_quantize(model)  # type: ignore[attr-defined]
         checkpoints = (
@@ -501,11 +508,10 @@ def train_in_dir(
             loss_fn,
             steps_per_epoch,
         )
-        # Placeholder for now, will be parametrized later (MLIA-1114)
-        # rewrite.check_optimization(  # type: ignore[attr-defined]
-        #     model, number_of_clusters=32
-        # )
 
+        rewrite.check_optimization(  # type: ignore[attr-defined]
+            model, **rewrite_specific_params if rewrite_specific_params else {}
+        )
     teacher.close()
     return output_filenames
 
@@ -528,9 +534,13 @@ def create_model(  # pylint: disable=too-many-arguments
     loss_fn: Callable,
     model_is_quantized: bool,
     model_to_load_from: keras.model | None = None,
+    rewrite_specific_params: dict | None = None,
 ) -> keras.Model:
     """Create a model, optionally from another."""
-    model = rewrite(input_shape, output_shape)
+    if rewrite_specific_params:
+        model = rewrite(input_shape, output_shape, **rewrite_specific_params)
+    else:
+        model = rewrite(input_shape, output_shape)
     if model_is_quantized:
         model = rewrite.quantize(model)  # type: ignore[attr-defined]
     model = model_compile(model, optimizer=optimizer, loss_fn=loss_fn)
@@ -558,6 +568,7 @@ def model_fit(  # pylint: disable=too-many-arguments
     loss_fn: Callable,
     steps_per_epoch: int,
     post_process: bool = False,
+    rewrite_specific_params: dict | None = None,
 ) -> keras.Model:
     """Train a tflite model."""
     steps_so_far = 0
@@ -597,6 +608,7 @@ def model_fit(  # pylint: disable=too-many-arguments
                     loss_fn,
                     model_is_quantized,
                     model_to_load_from=model,
+                    rewrite_specific_params=rewrite_specific_params,
                 )
             else:
                 model_to_save = model
diff --git a/src/mlia/nn/rewrite/library/clustering.py b/src/mlia/nn/rewrite/library/clustering.py
index 81bfd90..a81d2d4 100644
--- a/src/mlia/nn/rewrite/library/clustering.py
+++ b/src/mlia/nn/rewrite/library/clustering.py
@@ -9,11 +9,18 @@ from keras.api._v2 import keras  # Temporary workaround for now: MLIA-1107
 from mlia.nn.rewrite.library.helper_functions import compute_conv2d_parameters
 
 
-def fc_clustering_rewrite(input_shape: Any, output_shape: Any) -> keras.Model:
+def fc_clustering_rewrite(
+    input_shape: Any,
+    output_shape: Any,
+    num_clusters: int = 2,
+    cluster_centroids_init: tfmot.clustering.keras.CentroidInitialization = tfmot.clustering.keras.CentroidInitialization(  # pylint: disable=line-too-long
+        "CentroidInitialization.LINEAR"
+    ),
+) -> keras.Model:
     """Fully connected TensorFlow Lite model ready for clustering."""
     rewrite_params = {
-        "number_of_clusters": 4,
-        "cluster_centroids_init": tfmot.clustering.keras.CentroidInitialization.LINEAR,
+        "number_of_clusters": num_clusters,
+        "cluster_centroids_init": cluster_centroids_init,
     }
     model = tfmot.clustering.keras.cluster_weights(
         to_cluster=keras.Sequential(
@@ -28,11 +35,18 @@ def fc_clustering_rewrite(input_shape: Any, output_shape: Any) -> keras.Model:
     return model
 
 
-def conv2d_clustering_rewrite(input_shape: Any, output_shape: Any) -> keras.Model:
+def conv2d_clustering_rewrite(
+    input_shape: Any,
+    output_shape: Any,
+    num_clusters: int = 2,
+    cluster_centroids_init: tfmot.clustering.keras.CentroidInitialization = tfmot.clustering.keras.CentroidInitialization(  # pylint: disable=line-too-long
+        "CentroidInitialization.LINEAR"
+    ),
+) -> keras.Model:
     """Conv2d TensorFlow Lite model ready for clustering."""
     rewrite_params = {
-        "number_of_clusters": 4,
-        "cluster_centroids_init": tfmot.clustering.keras.CentroidInitialization.LINEAR,
+        "number_of_clusters": num_clusters,
+        "cluster_centroids_init": cluster_centroids_init,
     }
     conv2d_parameters = compute_conv2d_parameters(
         input_shape=input_shape, output_shape=output_shape
diff --git a/src/mlia/nn/rewrite/library/sparsity.py b/src/mlia/nn/rewrite/library/sparsity.py
index 745fa8b..2342e3d 100644
--- a/src/mlia/nn/rewrite/library/sparsity.py
+++ b/src/mlia/nn/rewrite/library/sparsity.py
@@ -9,7 +9,9 @@ from keras.api._v2 import keras  # Temporary workaround for now: MLIA-1107
 from mlia.nn.rewrite.library.helper_functions import compute_conv2d_parameters
 
 
-def fc_sparsity_rewrite(input_shape: Any, output_shape: Any) -> keras.Model:
+def fc_sparsity_rewrite(
+    input_shape: Any, output_shape: Any, sparsity_m: int = 2, sparsity_n: int = 4
+) -> keras.Model:
     """Fully connected TensorFlow Lite model ready for sparse pruning."""
     model = tfmot.sparsity.keras.prune_low_magnitude(
         to_prune=keras.Sequential(
@@ -19,13 +21,18 @@ def fc_sparsity_rewrite(input_shape: Any, output_shape: Any) -> keras.Model:
                 keras.layers.Dense(output_shape),
             ]
         ),
-        sparsity_m_by_n=(2, 4),
+        sparsity_m_by_n=(
+            sparsity_m,
+            sparsity_n,
+        ),
     )
 
     return model
 
 
-def conv2d_sparsity_rewrite(input_shape: Any, output_shape: Any) -> keras.Model:
+def conv2d_sparsity_rewrite(
+    input_shape: Any, output_shape: Any, sparsity_m: int = 2, sparsity_n: int = 4
+) -> keras.Model:
     """Conv2d TensorFlow Lite model ready for sparse pruning."""
     conv2d_parameters = compute_conv2d_parameters(
         input_shape=input_shape, output_shape=output_shape
@@ -39,7 +46,10 @@ def conv2d_sparsity_rewrite(input_shape: Any, output_shape: Any) -> keras.Model:
                 keras.layers.ReLU(),
             ]
         ),
-        sparsity_m_by_n=(2, 4),
+        sparsity_m_by_n=(
+            sparsity_m,
+            sparsity_n,
+        ),
     )
 
     return model