Contents

• Pre-Requirements
• Environment SetUp
  • Case 1
  • Case 1.1
  • Case 2
  • Case 3
• Frameworks comparison
• Tensorflow optimization methods
• Training optimization approaches
  • Pruning
  • XNOR nets
  • Knowledge distillation
• Simple servers
• Testing
  • Preprocessing and code testing
• Profiling
• Routines automation
• Converting weights to the tensorflow
• Conclusion

Pre-Requirements

• Docker. You may get it here
• Update docker memory limit if necessary
• Git, Python>=3.5

Environment SetUp

Case 1

• Clone the workshop repository

  git clone [email protected]:ikhlestov/deployml.git && cd deployml

• Create virtualenv

  python3.6 -m venv .venv && source .venv/bin/activate

• Install corresponding requirements

  pip install -r requirements/dev_mac.txt

  or

  pip install -r requirements/dev_ubuntu_cpu.txt

Note: requirements are based on python3.6. If you have another python version you should change link to the pytorch wheel at the requirements file which you may get here

Case 1.1

Additionally download tensorflow source code nearby:

git clone https://github.com/tensorflow/tensorflow.git -b v1.6.0

Case 2

pull small docker container:

docker pull ikhlestov/deployml_dev_small

or

pull large docker container(in case of really good Internet connection):

docker pull ikhlestov/deployml_dev

Case 3

Build your own docker container:

• Clone the workshop repository git clone [email protected]:ikhlestov/deployml.git && cd deployml
• Check dockers containers defined at the dockers folder
• Run build commands:
  • docker build -f dockers/Dev . -t ikhlestov/deployml_dev (for the workshop you should build only this image)
  • docker build -f dockers/Dev_small . -t ikhlestov/deployml_dev_small
  • docker build -f dockers/Prod . -t ikhlestov/deployml_prod
• Compare their sizes docker images | grep "deployml_dev\|deployml_dev_small\|deployml_prod"

Notes:

• Don't forget about .dockerignore file.
• Try to organize your docker files to use cache.
• Optimize your docker containers
• Try to release with some smaller distributions.
• You may use multistage builds

Frameworks comparison

• Check defined models in the models folder

• Run docker container with mounted directory:

  docker run -v $(pwd):/deployml -p 6060:6060 -p 8080:8080 -it ikhlestov/deployml_dev /bin/bash

• Run time measurements inside docker:

  python benchmarks/compare_frameworks.py

Tensorflow optimization methods

1. Save our tensorflow model.

   python optimizers/save_tensorflow_model.py

   1.1 Import saved model to tensorboard

   python misc/import_pb_to_tensorboard.py --model_dir saves/tensorflow/usual_model.pbtxt --log_dir saves/tensorboard/usual_model --graph_type PbTxt

   1.2 Run tensorboard in the background

   tensorboard --logdir saves/tensorboard --port 6060 --host=0.0.0.0 &

2. Build frozen graph. More about it you may read here

   python optimizers/get_frozen_graph.py

   python misc/import_pb_to_tensorboard.py --model_dir saves/tensorflow/constant_graph.pb --log_dir saves/tensorboard/constant_graph

3. Build optimized frozen graph

   python optimizers/get_optimized_frozen_graph.py

   python misc/import_pb_to_tensorboard.py --model_dir saves/tensorflow/optimized_graph.pb --log_dir saves/tensorboard/optimized_graph

4. Get quantized graph:

   3.1 With plain python (link to script)

    python /tensorflow/tensorflow/tools/quantization/quantize_graph.py \
        --input=saves/tensorflow/optimized_graph.pb \
        --output=saves/tensorflow/quantized_graph_python.pb \
        --output_node_names="output" \
        --mode=weights
   

   3.2. With bazel (tensorflow tutorial)

    ../tensorflow/bazel-bin/tensorflow/tools/graph_transforms/transform_graph \
        --in_graph=`pwd`/saves/tensorflow/optimized_graph.pb \
        --out_graph=`pwd`/saves/tensorflow/quantized_graph_bazel.pb  \
        --inputs="input:0" \
        --outputs="output:0" \
        --transforms='quantize_weights'
   

   3.3 Note: tf.contrib.quantize provide only simulated quantization.

   3.4 Import quantized models to the tensorboard

    python misc/import_pb_to_tensorboard.py \
        --model_dir saves/tensorflow/quantized_graph_bazel.pb \
        --log_dir saves/tensorboard/quantized_graph_bazel
    
    python misc/import_pb_to_tensorboard.py \
        --model_dir saves/tensorflow/quantized_graph_python.pb \
        --log_dir saves/tensorboard/quantized_graph_python
   

5. Compare resulted graphs

   5.1 sizes ls -l saves/tensorflow/

   5.2 architecture at the tensorboard

   5.3 Compare resulted graphs performance python benchmarks/compare_tf_optimizations.py

6. Try various restrictions

   6.1 CPU restriction

    docker run -v $(pwd):/deployml -it --cpus="1.0" ikhlestov/deployml_dev /bin/bash
   

   6.2 Memory restriction

    docker run -v $(pwd):/deployml -it --memory=1g ikhlestov/deployml_dev /bin/bash
   

   6.3 Use GPUs

    docker run --runtime=nvidia -v $(pwd):/deployml -it ikhlestov/deployml_dev /bin/bash
   

   6.3 Try to run two models on two different CPUs 6.4 Try to run two models on two CPU simultaneously

Training optimization approaches

You may also take a look at other methods (list of resources) like:

Pruning

XNOR nets

Knowledge distillation

Simple servers

One-to-one server(servers/simple_server.py)

Scaling with multiprocessing(servers/processes_server.py)

You may start servers (not simultaneously) as:

python servers/simple_server.py

or

python servers/processes_server.py

and test them with:

python servers/tester.py

Queues based(Kafka, RabbitMQ, etc)

Serving with tf-serving

Testing

Preprocessing and code testing

Q: Where data preprocessing should be done? CPU or GPU or even another host?

• enter to the preprocessing directory cd preprocessing

• run various resizers benchmarks python benchmark.py

  • Note: opencv may be installed from PyPi for python3

• check unified resizer at the image_preproc.py

• try to run tests for it pytest test_preproc.py(and they will fail)

• fix resizer

• run tests again pytest test_preproc.py

What else should be tested(really - as much as possible):

• General network inference
• Model loading/saving
• New models deploy
• Any preprocessing
• Corrupted inputs - Nan, Inf, zeros
• Deterministic output
• Input ranges/distributions
• Output ranges/distributions
• Test that model will fail in known cases
• ...
• Just check this video :)

You my run tests:

• At the various docker containers
• Under the tox

Profiling

• Code:

  • Line profiler
  • CProfile
  • PyCharm Profiler

• Tensorflow:

  • Chrome trace format based
  • Tf benchmark tool
  • Tf benchmark class

• CPU/GPU:

  • nvidia-smi
  • gpustat
  • psutil
  • nvidia profiler

• Lifetime benchmark - airspeed velocity

Routines automation

• Continuous integration:

  • Jenkins
  • Travis
  • TeamCity
  • CircleCI

• Clusters:

  • Kubernetes
  • Mesos
  • Docker swarm

• Configuration management:

  • Terraform
  • Ansible
  • Chef
  • Puppet
  • SaltStack

Converting weights to the tensorflow

• Converting from keras to tensorflow:

  • Get keras saved model python converters/save_keras_model.py
  • Convert keras model to the tensorflow save format python converters/convert_keras_to_tf.py

• Converting from PyTorch to tensorflow:

  • Trough keras - converter
  • Manually

In any case you should know about:

• Open Neural Network Exchange
• Deep Learning Model Convertors

Conclusion

I'm grateful for the cool ideas to Alexandr Onbysh, Aleksandr Obednikov, Kyryl Truskovskyi and to the Ring Urkaine in overall.

Take a look at the checklist.

Thank you for reading!