support 1dcnn distilling

Signed-off-by: priscilla-pan <pan.jiayi@zte.com.cn>

Author: priscilla-pan

README.md

@@ -65,6 +65,10 @@ The details are shown in the table below, and the code can refer to examples\res
 | + pruned + distill | 76.39   | 6954152 ( 72.8% pruned) | 1075M                     | 27M|
 | + pruned + distill + quantization(TF-Lite)  | 75.938  | - | -                     | 7.1M|
 
+We also impletement a 1D-CNN distillation which shows distillation is also effective on Encrypted Traffic Classification.
+You can get detailed instructions from [here](doc/CNN-1D-tiny-Distillation.md). Following this instruction, you can build
+your own dataset and model to train and distill under adlik model optimizer.
+
 ## 1. Pruning and quantization principle
 
 ### 1.1 Filter pruning

doc/CNN-1D-tiny-Distillation.md

@@ -0,0 +1,113 @@
+# Tiny 1D-CNN Knowledge Distillation
+
+The following uses 1D-CNN on the 12 classes session all dataset as teacher model to illustrate how to use the model 
+optimizer to improve the preformance of tiny 1D-CNN by knowledge distillation.
+
+The 1D-CNN model is from Wang's paper[Wang, W.; Zhu, M.; Wang, J.; Zeng, X.; Yang, Z. End-to-end encrypted traffic 
+classification with one-dimensional convolution neural networks.] The tiny 1D-CNN model is a slim version of the 1D-CNN 
+model mentioned before. Using 1D-CNN model as the teacher to ditstill tiny 1D-CNN model, performance can be improved by
+5.66%.
+
+The details are shown in the table below, and the code can refer to examples\cnn1d_tiny_iscx_session_all_distill.py. 
+
+| Model     | Accuracy | Params              | Model Size |
+| --------- | -------- | -------------------- | ---------------------------- |
+| cnn1d | 92.67%   | 5832588 | 23M|
+| cnn1d_tiny | 87.62%   | 134988 | 546K|
+| cnn1d_tiny+ distill | 93.28%   | 134988 | 546K|
+
+
+## 1 Create custom dataset
+Using [ISCX dataset](https://www.unb.ca/cic/datasets/vpn.html), you can get the processed 12-classes-session-all dataset
+from [wang's github](https://github.com/echowei/DeepTraffic/blob/master/2.encrypted_traffic_classification/3.PerprocessResults/12class.zip).
+We name the dataset as iscx_session_all. In the iscx_session_all, there are 35501 training samples, the shape is (35501, 28, 28), 
+3945 testing samples. 
+
+Now that you have the dataset, you can implement your custom dateset by extending model_optimizer.prunner.dataset.
+dataset_base.DatasetBase and implementing:
+
+1. \__init__, required, where you can do all dataset initialization 
+2. parse_fn, required, where is  the map function of the dataset 
+3. parse_fn_distill, required, where is the map function of the dataset used in distillation
+4. build, optional, where is the process of building the dataset. If your dataset is not in tfrecord format, you must 
+implement this function.
+
+Here in the custom dataset, we reshape the samples from (None, 28, 28, 1) to (None, 1, 784, 1) for the following 1D-CNN
+models.
+
+After that, all you need is put the dataset name in the following files:
+1. src/model_optimizer/prunner/config_schema.json the "enum" list
+2. src/model_optimizer/prunner/dataset/\__init__.py. Add the dataset name in Line 19 and add the dataset instance in the
+if-else clause.
+
+## Create custom model
+Create your own model using The Keras functional API in model_optimizer.prunner.models.
+
+After that, all you need is put the model name and initialize the model in the following files:
+1. src/model_optimizer/prunner/models/\__init__.py. Add the model name in Line 21 and add the model instance in the
+if-else clause.
+
+## Create custom learner
+Implement your own learner by extending model_optimizer.prunner.learner.learner_base.LearnerBase and implementing:
+1. \__init__, required, where you can define your own learning rate callback
+2. get_optimizer, required, where you can define your own optimizer
+3. get_losses, required, where you can define your own loss function
+4. get_metrics, required, where you can define your own metrics
+
+After that, all you need is put the model name and dataset name and initialize the learner in the following files:
+1. src/model_optimizer/prunner/learner/\__init__.py 
+
+## Create the training process of the teacher model, and train the teacher model
+Enter the examples directory, create cnn1d_iscx_session_all_train.py for cnn1d model. 
+
+> Note
+>  
+> > the "model_name" and "dataset" in the request must be the same as you defined before
+
+Execute:
+
+```shell
+cd examples
+python3 cnn1d_iscx_session_all_train.py
+```
+
+After execution, the default checkpoint file will be generated in ./models_ckpt/cnn1d, and the inference
+checkpoint file will be generated in ./models_eval_ckpt/cnn1d. You can also modify the checkpoint_path
+and checkpoint_eval_path of the cnn1d_iscx_session_all_train.py file to change the generated file path.
+
+## Convert the teacher model to logits output
+Enter the tools directory and execute:
+```shell
+cd tools
+python3 convert_softmax_model_to_logits.py
+```
+
+After execution, the default checkpoint file of logits model will be generated in examples/models_eval_ckpt/cnn1d/
+checkpoint-60-logits.h5
+
+## Create the distilling process and distill the cnn1d_tiny model
+Create the configuration file in the src/model_optimizer/pruner/scheduler/distill,like "cnn1d_tiny_0.3.yaml" where the 
+distillation parameters is configured.
+
+Enter the examples directory, create cnn1d_tiny_iscx_session_all_distill.py for cnn1d_tiny model. In the distilling 
+process, the teacher is cnn1d, the student is cnn1d_tiny. 
+
+> Note
+>  
+> > the "model_name" and "dataset" in the request must be the same as you defined before
+
+```shell
+python3 cnn1d_tiny_iscx_session_all_distill.py
+```
+
+After execution, the default checkpoint file will be generated in ./models_ckpt/cnn1d_tiny_distill, and the inference 
+checkpoint file will be generated in ./models_eval_ckpt/cnn1d_tiny_distill. You can also  modify the checkpoint_path and
+checkpoint_eval_path of the cnn1d_tiny_iscx_session_all_distill.py file to change the 
+generated file path.
+
+> Note
+>  
+> > i. The model in the checkpoint_path is not the pure cnn1d_tiny model. It's the hybird of cnn1d_tiny(student) and  
+> > cnn1d(teacher)
+> >
+> > ii. The model in the checkpoint_eval_path is the distilled model, i.e. pure cnn1d_tiny model

examples/cnn1d_iscx_session_all_train.py

@@ -0,0 +1,36 @@
+# Copyright 2019 ZTE corporation. All Rights Reserved.
+# SPDX-License-Identifier: Apache-2.0
+
+"""
+Train a cnn1d model on iscx_session_all dataset
+"""
+import os
+# If you did not execute the setup.py, uncomment the following four lines
+# import sys
+# from os.path import abspath, join, dirname
+# sys.path.insert(0, join(abspath(dirname(__file__)), '../src'))
+# print(sys.path)
+
+from model_optimizer import prune_model  # noqa: E402
+
+
+def _main():
+    base_dir = os.path.dirname(__file__)
+    request = {
+        "dataset": "iscx_session_all",
+        "model_name": "cnn1d",
+        "data_dir": "/data/12class/SessionAllLayers",
+        "batch_size": 500,
+        "batch_size_val": 100,
+        "learning_rate": 1e-3,
+        "epochs": 60,
+        "checkpoint_path": os.path.join(base_dir, "./models_ckpt/cnn1d"),
+        "checkpoint_save_period": 1,  # save a checkpoint every epoch
+        "checkpoint_eval_path": os.path.join(base_dir, "./models_eval_ckpt/cnn1d"),
+        "scheduler": "train"
+    }
+    prune_model(request)
+
+
+if __name__ == "__main__":
+    _main()

examples/cnn1d_tiny_iscx_session_all_distill.py

@@ -0,0 +1,37 @@
+# Copyright 2019 ZTE corporation. All Rights Reserved.
+# SPDX-License-Identifier: Apache-2.0
+
+"""
+Distill a cnn1d_tiny model from a trained cnn1d model on the iscx_session_all dataset
+"""
+import os
+# If you did not execute the setup.py, uncomment the following four lines
+# import sys
+# from os.path import abspath, join, dirname
+# sys.path.insert(0, join(abspath(dirname(__file__)), '../src'))
+# print(sys.path)
+
+from model_optimizer import prune_model  # noqa: E402
+
+
+def _main():
+    base_dir = os.path.dirname(__file__)
+    request = {
+        "dataset": "iscx_session_all",
+        "model_name": "cnn1d_tiny",
+        "data_dir": "/data/12class/SessionAllLayers",
+        "batch_size": 500,
+        "batch_size_val": 100,
+        "learning_rate": 1e-3,
+        "epochs": 200,
+        "checkpoint_path": os.path.join(base_dir, "./models_ckpt/cnn1d_tiny_distill"),
+        "checkpoint_save_period": 10,  # save a checkpoint every epoch
+        "checkpoint_eval_path": os.path.join(base_dir, "./models_eval_ckpt/cnn1d_tiny_distill"),
+        "scheduler": "distill",
+        "scheduler_file_name": "cnn1d_tiny_0.3.yaml"
+    }
+    prune_model(request)
+
+
+if __name__ == "__main__":
+    _main()

examples/cnn1d_tiny_iscx_session_all_train.py

@@ -0,0 +1,36 @@
+# Copyright 2019 ZTE corporation. All Rights Reserved.
+# SPDX-License-Identifier: Apache-2.0
+
+"""
+Train a cnn1d_tiny model on iscx_session_all dataset
+"""
+import os
+# If you did not execute the setup.py, uncomment the following four lines
+# import sys
+# from os.path import abspath, join, dirname
+# sys.path.insert(0, join(abspath(dirname(__file__)), '../src'))
+# print(sys.path)
+
+from model_optimizer import prune_model  # noqa: E402
+
+
+def _main():
+    base_dir = os.path.dirname(__file__)
+    request = {
+        "dataset": "iscx_session_all",
+        "model_name": "cnn1d_tiny",
+        "data_dir": "/data/12class/SessionAllLayers",
+        "batch_size": 500,
+        "batch_size_val": 100,
+        "learning_rate": 1e-3,
+        "epochs": 60,
+        "checkpoint_path": os.path.join(base_dir, "./models_ckpt/cnn1d_tiny"),
+        "checkpoint_save_period": 10,  # save a checkpoint every epoch
+        "checkpoint_eval_path": os.path.join(base_dir, "./models_eval_ckpt/cnn1d_tiny"),
+        "scheduler": "train"
+    }
+    prune_model(request)
+
+
+if __name__ == "__main__":
+    _main()

src/model_optimizer/pruner/config_schema.json

@@ -6,7 +6,8 @@
       "enum": [
         "mnist",
         "cifar10",
-        "imagenet"
+        "imagenet",
+        "iscx_session_all"
       ],
       "description": "dataset name"
     },

src/model_optimizer/pruner/dataset/__init__.py

@@ -16,7 +16,7 @@ def get_dataset(config, is_training, num_shards=1, shard_index=0):
     :return: class of Dataset
     """
     dataset_name = config.get_attribute('dataset')
-    if dataset_name not in ['mnist', 'cifar10', 'imagenet']:
+    if dataset_name not in ['mnist', 'cifar10', 'imagenet', 'iscx_session_all']:
         raise Exception('Not support dataset %s' % dataset_name)
     if dataset_name == 'mnist':
         from .mnist import MnistDataset
@@ -27,5 +27,8 @@ def get_dataset(config, is_training, num_shards=1, shard_index=0):
     elif dataset_name == 'imagenet':
         from .imagenet import ImagenetDataset
         return ImagenetDataset(config, is_training, num_shards, shard_index)
+    elif dataset_name == 'iscx_session_all':
+        from .iscx_session_all import ISCXDataset
+        return ISCXDataset(config, is_training, num_shards, shard_index)
     else:
         raise Exception('Not support dataset {}'.format(dataset_name))

src/model_optimizer/pruner/dataset/cifar10.py

@@ -31,6 +31,7 @@ def __init__(self, config, is_training):
         self.buffer_size = 10000
         self.num_samples_of_train = 50000
         self.num_samples_of_val = 10000
+        self.data_shape = (32, 32, 3)
 
     # pylint: disable=no-value-for-parameter,unexpected-keyword-arg
     def parse_fn(self, example_serialized):

src/model_optimizer/pruner/dataset/dataset_base.py

@@ -78,9 +78,9 @@ def build(self, is_distill=False):
             dataset = dataset.map(self.parse_fn_distill, num_parallel_calls=tf.data.experimental.AUTOTUNE)
         else:
             dataset = dataset.map(self.parse_fn, num_parallel_calls=tf.data.experimental.AUTOTUNE)
-        return self.__build_batch(dataset)
+        return self.build_batch(dataset)
 
-    def __build_batch(self, dataset):
+    def build_batch(self, dataset):
         """
         Make an batch from tf.data.Dataset.
         :param dataset: tf.data.Dataset object

src/model_optimizer/pruner/dataset/imagenet.py

@@ -32,6 +32,7 @@ def __init__(self, config, is_training, num_shards=1, shard_index=0):
         self.buffer_size = 10000
         self.num_samples_of_train = 1281167
         self.num_samples_of_val = 50000
+        self.data_shape = (224, 224, 3)
 
     # pylint: disable=no-value-for-parameter,unexpected-keyword-arg
     def parse_fn(self, example_serialized):

src/model_optimizer/pruner/dataset/iscx_session_all.py

@@ -0,0 +1,85 @@
+# Copyright 2019 ZTE corporation. All Rights Reserved.
+# SPDX-License-Identifier: Apache-2.0
+
+"""
+ISCX 12 class session all dataset
+https://github.com/echowei/DeepTraffic/blob/master/2.encrypted_traffic_classification/3.PerprocessResults/12class.zip
+
+"""
+import os
+import gzip
+import tensorflow as tf
+from tensorflow.python.keras.utils.data_utils import get_file
+import numpy as np
+from .dataset_base import DatasetBase
+
+
+class ISCXDataset(DatasetBase):
+    """
+    ISCX session all layer dataset
+    """
+    def __init__(self, config, is_training, num_shards=1, shard_index=0):
+        """
+        Constructor function.
+        :param config: Config object
+        :param is_training: whether to construct the training subset
+        :return:
+        """
+        super().__init__(config, is_training, num_shards, shard_index)
+        if is_training:
+            self.batch_size = self.batch_size
+        else:
+            self.batch_size = self.batch_size_val
+        self.buffer_size = 5000
+        self.num_samples_of_train = 35501
+        self.num_samples_of_val = 3945
+        self.data_shape = (1, 784, 1)
+
+    # pylint: disable=R0201
+    # pylint: disable=no-value-for-parameter,unexpected-keyword-arg
+    def parse_fn(self, *content):
+        data, label = content
+        return data, label
+
+    def parse_fn_distill(self, *content):
+        """
+        Parse dataset for distillation
+        :param content: item content of the dataset
+        :return: {image, label},{}
+        """
+        image, label = self.parse_fn(*content)
+        inputs = {"image": image, "label": label}
+        targets = {}
+        return inputs, targets
+
+    def build(self, is_distill=False):
+        """
+        Build dataset
+        :param is_distill: is distilling or not
+        :return: batch of a dataset
+        """
+        if self.is_training:
+            x_path = os.path.join(self.data_dir, 'train-images-idx3-ubyte.gz')
+            y_path = os.path.join(self.data_dir, 'train-labels-idx1-ubyte.gz')
+        else:
+            x_path = os.path.join(self.data_dir, 't10k-images-idx3-ubyte.gz')
+            y_path = os.path.join(self.data_dir, 't10k-labels-idx1-ubyte.gz')
+
+        with gzip.open(y_path, 'rb') as lbpath:
+            y_data = np.frombuffer(lbpath.read(), np.uint8, offset=8)
+
+        with gzip.open(x_path, 'rb') as imgpath:
+            x_data = np.frombuffer(
+                imgpath.read(), np.uint8, offset=16).reshape(len(y_data), 1, 784)
+
+        dataset = tf.data.Dataset.from_tensor_slices((x_data, y_data))
+
+        if self.num_shards != 1:
+            dataset = dataset.shard(num_shards=self.num_shards, index=self.shard_index)
+        if self.is_training:
+            dataset = dataset.shuffle(buffer_size=self.buffer_size).repeat()
+        if is_distill:
+            dataset = dataset.map(self.parse_fn_distill, num_parallel_calls=tf.data.experimental.AUTOTUNE)
+        else:
+            dataset = dataset.map(self.parse_fn, num_parallel_calls=tf.data.experimental.AUTOTUNE)
+        return self.build_batch(dataset)

src/model_optimizer/pruner/dataset/mnist.py

@@ -31,6 +31,7 @@ def __init__(self, config, is_training):
         self.buffer_size = 10000
         self.num_samples_of_train = 60000
         self.num_samples_of_val = 10000
+        self.data_shape = (28, 28, 1)
 
     # pylint: disable=R0201
     # pylint: disable=no-value-for-parameter,unexpected-keyword-arg