Merge pull request #8604 from Ruomei:toupstream/clusteringexample

PiperOrigin-RevId: 329801211

official/benchmark/keras_imagenet_benchmark.py

@@ -42,6 +42,7 @@ MOBILENET_V1_MAX_TOP_1_ACCURACY = 0.68
 MODEL_OPTIMIZATION_TOP_1_ACCURACY = {
     'RESNET50_FINETUNE_PRUNING': (0.76, 0.77),
     'MOBILENET_V1_FINETUNE_PRUNING': (0.67, 0.68),
+    'MOBILENET_V1_FINETUNE_CLUSTERING': (0.68, 0.70)
 }
 
 FLAGS = flags.FLAGS
@@ -995,7 +996,7 @@ class Resnet50KerasBenchmarkBase(keras_benchmark.KerasBenchmark):
     FLAGS.model_dir = self._get_model_dir('benchmark_8_gpu_fp16_tweaked')
     FLAGS.batch_size = 256 * 8  # 8 GPUs
     FLAGS.tf_gpu_thread_mode = 'gpu_private'
-    FLAGS.dataset_num_private_threads = 40
+    FLAGS.datasets_num_private_threads = 40
     self._run_and_report_benchmark()
 
   def benchmark_8_gpu_fp16_dynamic_tweaked(self):
@@ -1011,7 +1012,7 @@ class Resnet50KerasBenchmarkBase(keras_benchmark.KerasBenchmark):
     FLAGS.batch_size = 256 * 8  # 8 GPUs
     FLAGS.loss_scale = 'dynamic'
     FLAGS.tf_gpu_thread_mode = 'gpu_private'
-    FLAGS.dataset_num_private_threads = 40
+    FLAGS.datasets_num_private_threads = 40
     self._run_and_report_benchmark()
 
   def benchmark_xla_8_gpu_fp16(self):
@@ -1774,5 +1775,120 @@ class Resnet50KerasPruningBenchmarkReal(KerasPruningBenchmarkRealBase):
         default_flags=default_flags, **kwargs)
 
 
+class KerasClusteringAccuracyBase(keras_benchmark.KerasBenchmark):
+  """Benchmark accuracy tests for clustering method."""
+
+  def __init__(self,
+               output_dir=None,
+               root_data_dir=None,
+               default_flags=None,
+               **kwargs):
+    """An accuracy benchmark class for clustering method.
+
+    Args:
+      output_dir: directory where to output e.g. log files
+      root_data_dir: directory under which to look for dataset
+      default_flags: default flags
+      **kwargs: arbitrary named arguments. This is needed to make the
+                constructor forward compatible in case PerfZero provides more
+                named arguments before updating the constructor.
+    """
+    if default_flags is None:
+      default_flags = {}
+    default_flags['clustering_method'] = 'selective_clustering'
+    default_flags['data_dir'] = os.path.join(root_data_dir, 'imagenet')
+    default_flags['model'] = 'mobilenet_pretrained'
+    default_flags['optimizer'] = 'mobilenet_fine_tune'
+
+    flag_methods = [resnet_imagenet_main.define_imagenet_keras_flags]
+
+    super(KerasClusteringAccuracyBase, self).__init__(
+        output_dir=output_dir,
+        flag_methods=flag_methods,
+        default_flags=default_flags,
+        **kwargs)
+
+  def benchmark_8_gpu(self):
+    """Test Keras model with eager, dist_strat and 8 GPUs."""
+    self._setup()
+
+    FLAGS.num_gpus = 8
+    FLAGS.batch_size = 32 * 8
+    FLAGS.train_epochs = 1
+    FLAGS.model_dir = self._get_model_dir('benchmark_8_gpu')
+    FLAGS.dtype = 'fp32'
+    FLAGS.enable_eager = True
+    self._run_and_report_benchmark()
+
+  @benchmark_wrappers.enable_runtime_flags
+  def _run_and_report_benchmark(self,
+                                top_1_min=MODEL_OPTIMIZATION_TOP_1_ACCURACY[
+                                    'MOBILENET_V1_FINETUNE_CLUSTERING'][0],
+                                top_1_max=MODEL_OPTIMIZATION_TOP_1_ACCURACY[
+                                    'MOBILENET_V1_FINETUNE_CLUSTERING'][1]):
+    start_time_sec = time.time()
+    stats = resnet_imagenet_main.run(flags.FLAGS)
+    wall_time_sec = time.time() - start_time_sec
+
+    super(KerasClusteringAccuracyBase, self)._report_benchmark(
+        stats,
+        wall_time_sec,
+        top_1_min=top_1_min,
+        top_1_max=top_1_max,
+        total_batch_size=FLAGS.batch_size,
+        log_steps=100)
+
+
+class MobilenetV1KerasClusteringAccuracy(KerasClusteringAccuracyBase):
+  """Benchmark accuracy tests for MobilenetV1 with clustering method."""
+
+  def __init__(self, root_data_dir=None, **kwargs):
+    default_flags = {
+        'model': 'mobilenet_pretrained',
+        'optimizer': 'mobilenet_fine_tune',
+    }
+    super(MobilenetV1KerasClusteringAccuracy, self).__init__(
+        root_data_dir=root_data_dir,
+        default_flags=default_flags,
+        **kwargs)
+
+  def _run_and_report_benchmark(self):
+    super(MobilenetV1KerasClusteringAccuracy, self)._run_and_report_benchmark(
+        top_1_min=\
+        MODEL_OPTIMIZATION_TOP_1_ACCURACY['MOBILENET_V1_FINETUNE_CLUSTERING'][0],
+        top_1_max=\
+        MODEL_OPTIMIZATION_TOP_1_ACCURACY['MOBILENET_V1_FINETUNE_CLUSTERING'][1])
+
+
+class KerasClusteringBenchmarkRealBase(Resnet50KerasBenchmarkBase):
+  """Clustering method benchmarks."""
+
+  def __init__(self, root_data_dir=None, default_flags=None, **kwargs):
+    if default_flags is None:
+      default_flags = {}
+    default_flags.update({
+        'skip_eval': True,
+        'report_accuracy_metrics': False,
+        'data_dir': os.path.join(root_data_dir, 'imagenet'),
+        'clustering_method': 'selective_clustering',
+        'train_steps': 110,
+        'log_steps': 10,
+    })
+    super(KerasClusteringBenchmarkRealBase, self).__init__(
+        default_flags=default_flags, **kwargs)
+
+
+class MobilenetV1KerasClusteringBenchmarkReal(KerasClusteringBenchmarkRealBase):
+  """Clustering method benchmarks for MobilenetV1."""
+
+  def __init__(self, **kwargs):
+    default_flags = {
+        'model': 'mobilenet_pretrained',
+        'optimizer': 'mobilenet_fine_tune',
+    }
+    super(MobilenetV1KerasClusteringBenchmarkReal, self).__init__(
+        default_flags=default_flags, **kwargs)
+
+
 if __name__ == '__main__':
   tf.test.main()

official/benchmark/models/resnet_imagenet_main.py

@@ -26,7 +26,6 @@ from absl import flags
 from absl import logging
 import tensorflow as tf
 
-import tensorflow_model_optimization as tfmot
 from official.modeling import performance
 from official.utils.flags import core as flags_core
 from official.utils.misc import distribution_utils
@@ -38,6 +37,34 @@ from official.vision.image_classification.resnet import imagenet_preprocessing
 from official.vision.image_classification.resnet import resnet_model
 
 
+def cluster_last_three_conv2d_layers(model):
+  import tensorflow_model_optimization as tfmot
+  last_three_conv2d_layers =  [
+      layer for layer in model.layers
+      if isinstance(layer, tf.keras.layers.Conv2D)
+    ][-3:]
+
+  cluster_weights = tfmot.clustering.keras.cluster_weights
+  CentroidInitialization = tfmot.clustering.keras.CentroidInitialization
+
+  def cluster_fn(layer):
+    if layer not in last_three_conv2d_layers:
+      return layer
+
+    if layer == last_three_conv2d_layers[0] or \
+      layer == last_three_conv2d_layers[1]:
+      clustered = cluster_weights(layer, number_of_clusters=256, \
+          cluster_centroids_init=CentroidInitialization.LINEAR)
+      print("Clustered {} with 256 clusters".format(layer.name))
+    else:
+      clustered = cluster_weights(layer, number_of_clusters=32, \
+          cluster_centroids_init=CentroidInitialization.LINEAR)
+      print("Clustered {} with 32 clusters".format(layer.name))
+    return clustered
+
+  return tf.keras.models.clone_model(model, clone_function=cluster_fn)
+
+
 def run(flags_obj):
   """Run ResNet ImageNet training and eval loop using native Keras APIs.
 
@@ -53,7 +80,6 @@ def run(flags_obj):
   """
   keras_utils.set_session_config(
       enable_xla=flags_obj.enable_xla)
-
   # Execute flag override logic for better model performance
   if flags_obj.tf_gpu_thread_mode:
     keras_utils.set_gpu_thread_mode_and_count(
@@ -117,7 +143,8 @@ def run(flags_obj):
   # This use_keras_image_data_format flags indicates whether image preprocessor
   # output format should be same as the keras backend image data format or just
   # channel-last format.
-  use_keras_image_data_format = (flags_obj.model == 'mobilenet')
+  use_keras_image_data_format = \
+    (flags_obj.model == 'mobilenet' or 'mobilenet_pretrained')
   train_input_dataset = input_fn(
       is_training=True,
       data_dir=flags_obj.data_dir,
@@ -155,9 +182,11 @@ def run(flags_obj):
   with strategy_scope:
     if flags_obj.optimizer == 'resnet50_default':
       optimizer = common.get_optimizer(lr_schedule)
-    elif flags_obj.optimizer == 'mobilenet_default':
+    elif flags_obj.optimizer == 'mobilenet_default' or 'mobilenet_fine_tune':
       initial_learning_rate = \
           flags_obj.initial_learning_rate_per_sample * flags_obj.batch_size
+      if flags_obj.optimizer == 'mobilenet_fine_tune':
+        initial_learning_rate = 1e-5
       optimizer = tf.keras.optimizers.SGD(
           learning_rate=tf.keras.optimizers.schedules.ExponentialDecay(
               initial_learning_rate,
@@ -165,6 +194,7 @@ def run(flags_obj):
               decay_rate=flags_obj.lr_decay_factor,
               staircase=True),
           momentum=0.9)
+
     if flags_obj.fp16_implementation == 'graph_rewrite':
       # Note: when flags_obj.fp16_implementation == "graph_rewrite", dtype as
       # determined by flags_core.get_tf_dtype(flags_obj) would be 'float32'
@@ -180,17 +210,25 @@ def run(flags_obj):
     elif flags_obj.model == 'resnet50_v1.5':
       model = resnet_model.resnet50(
           num_classes=imagenet_preprocessing.NUM_CLASSES)
-    elif flags_obj.model == 'mobilenet':
+    elif flags_obj.model == 'mobilenet' or 'mobilenet_pretrained':
       # TODO(kimjaehong): Remove layers attribute when minimum TF version
       # support 2.0 layers by default.
+      if flags_obj.model == 'mobilenet_pretrained':
+        classes_labels = 1000
+        initial_weights = 'imagenet'
+      else:
+        classes_labels = imagenet_preprocessing.NUM_CLASSES
+        initial_weights = None
       model = tf.keras.applications.mobilenet.MobileNet(
-          weights=None,
-          classes=imagenet_preprocessing.NUM_CLASSES,
+          weights=initial_weights,
+          classes=classes_labels,
           layers=tf.keras.layers)
+
     if flags_obj.pretrained_filepath:
       model.load_weights(flags_obj.pretrained_filepath)
 
     if flags_obj.pruning_method == 'polynomial_decay':
+      import tensorflow_model_optimization as tfmot
       if dtype != tf.float32:
         raise NotImplementedError(
             'Pruning is currently only supported on dtype=tf.float32.')
@@ -205,8 +243,18 @@ def run(flags_obj):
       }
       model = tfmot.sparsity.keras.prune_low_magnitude(model, **pruning_params)
     elif flags_obj.pruning_method:
+      raise NotImplementedError('Only polynomial_decay is currently supported.')
+
+    if flags_obj.clustering_method == 'selective_clustering':
+      import tensorflow_model_optimization as tfmot
+      if dtype != tf.float32 or \
+        flags_obj.fp16_implementation == 'graph_rewrite':
         raise NotImplementedError(
-          'Only polynomial_decay is currently supported.')
+            'Clustering is currently only supported on dtype=tf.float32.')
+      model = cluster_last_three_conv2d_layers(model)
+    elif flags_obj.clustering_method:
+      raise NotImplementedError(
+          'Only selective_clustering is implemented.')
 
     model.compile(
         loss='sparse_categorical_crossentropy',
@@ -222,7 +270,7 @@ def run(flags_obj):
       enable_checkpoint_and_export=flags_obj.enable_checkpoint_and_export,
       model_dir=flags_obj.model_dir)
 
-  # if mutliple epochs, ignore the train_steps flag.
+  # If mutliple epochs, ignore the train_steps flag.
   if train_epochs <= 1 and flags_obj.train_steps:
     steps_per_epoch = min(flags_obj.train_steps, steps_per_epoch)
     train_epochs = 1
@@ -244,7 +292,7 @@ def run(flags_obj):
 
   if not strategy and flags_obj.explicit_gpu_placement:
     # TODO(b/135607227): Add device scope automatically in Keras training loop
-    # when not using distribition strategy.
+    # when not using distribution strategy.
     no_dist_strat_device = tf.device('/device:GPU:0')
     no_dist_strat_device.__enter__()
 
@@ -265,6 +313,10 @@ def run(flags_obj):
 
   if flags_obj.pruning_method:
     model = tfmot.sparsity.keras.strip_pruning(model)
+
+  if flags_obj.clustering_method:
+    model = tfmot.clustering.keras.strip_clustering(model)
+
   if flags_obj.enable_checkpoint_and_export:
     if dtype == tf.bfloat16:
       logging.warning('Keras model.save does not support bfloat16 dtype.')
@@ -286,6 +338,7 @@ def define_imagenet_keras_flags():
       optimizer=True,
       pretrained_filepath=True)
   common.define_pruning_flags()
+  common.define_clustering_flags()
   flags_core.set_defaults()
   flags.adopt_module_key_flags(common)
 

official/benchmark/models/resnet_imagenet_test.py

@@ -31,7 +31,8 @@ from official.vision.image_classification.resnet import imagenet_preprocessing
     "resnet",
     # "resnet_polynomial_decay",  b/151854314
     "mobilenet",
-    # "mobilenet_polynomial_decay"  b/151854314
+    # "mobilenet_polynomial_decay",  b/151854314
+    "mobilenet_selective_clustering",
 )
 class KerasImagenetTest(tf.test.TestCase):
   """Unit tests for Keras Models with ImageNet."""
@@ -74,6 +75,11 @@ class KerasImagenetTest(tf.test.TestCase):
           "-pruning_method",
           "polynomial_decay",
       ],
+      "mobilenet_selective_clustering": [
+          "-model", "mobilenet_pretrained",
+          "-optimizer", "mobilenet_fine_tune",
+          "-clustering_method", "selective_clustering",
+      ]
   }
   _tempdir = None
 
@@ -167,7 +173,10 @@ class KerasImagenetTest(tf.test.TestCase):
     extra_flags = extra_flags + self.get_extra_flags_dict(flags_key)
 
     if "polynomial_decay" in extra_flags:
-      self.skipTest("Pruning with fp16 is not currently supported.")
+      self.skipTest("Pruning with fp16 is currently not supported.")
+
+    if "selective_clustering" in extra_flags:
+      self.skipTest("Clustering with fp16 is currently not supported.")
 
     integration.run_synthetic(
         main=resnet_imagenet_main.run,
@@ -237,7 +246,10 @@ class KerasImagenetTest(tf.test.TestCase):
     extra_flags = extra_flags + self.get_extra_flags_dict(flags_key)
 
     if "polynomial_decay" in extra_flags:
-      self.skipTest("Pruning with fp16 is not currently supported.")
+      self.skipTest("Pruning with fp16 is currently not supported.")
+
+    if "selective_clustering" in extra_flags:
+      self.skipTest("Clustering with fp16 is currently not supported.")
 
     integration.run_synthetic(
         main=resnet_imagenet_main.run,
@@ -264,7 +276,10 @@ class KerasImagenetTest(tf.test.TestCase):
     extra_flags = extra_flags + self.get_extra_flags_dict(flags_key)
 
     if "polynomial_decay" in extra_flags:
-      self.skipTest("Pruning with fp16 is not currently supported.")
+      self.skipTest("Pruning with fp16 is currently not supported.")
+
+    if "selective_clustering" in extra_flags:
+      self.skipTest("Clustering with fp16 is currently not supported.")
 
     integration.run_synthetic(
         main=resnet_imagenet_main.run,

official/requirements.txt

@@ -9,7 +9,7 @@ psutil>=5.4.3
 py-cpuinfo>=3.3.0
 scipy>=0.19.1
 tensorflow-hub>=0.6.0
-tensorflow-model-optimization>=0.2.1
+tensorflow-model-optimization>=0.4.1
 tensorflow-datasets
 tensorflow-addons
 dataclasses

official/vision/image_classification/resnet/common.py

@@ -353,6 +353,13 @@ def define_pruning_flags():
   flags.DEFINE_integer('pruning_frequency', 100, 'Frequency for pruning.')
 
 
+def define_clustering_flags():
+  """Define flags for clustering methods."""
+  flags.DEFINE_string('clustering_method', None,
+                      'None (no clustering) or selective_clustering '
+                      '(cluster last three Conv2D layers of the model).')
+
+
 def get_synth_input_fn(height,
                        width,
                        num_channels,