BATCH: Machine Learning Inference Serving on Serverless Platforms with Adaptive Batching [DOI]

Prerequisite

• AWS Cli
• boto3

Deployment:

To deploy the Lambda serverless function follow the instruction in the How to deploy deep learning models with aws lambda and tensorflow. However, this tutorial do not support batching.

Our updated model and lambda package supports batching. The batching enabled lambda packge can be deployed by following the same steps mentioned in the demo and just by replacing the model file and packge file. We use Tensorflow 1.8 in our packge. At the time of our experiments this was the most latest Tensorflow version which could be zipped to 50 MB (Lambda limitation).

Find optimal configuration

• To find the optimal configuration of the serverless environment, run the solver.py python script.
• solver.py must be run with python3 and requires the following modules:
  1. argparse
  2. numpy
  3. matplotlib
  4. scipy
  5. ortools
• To print the help, try: python solver.py --help
• To run the solver, try: python solver.py --model TF-inceptionV4 --percentile 0.95 --slo 0.00003 --constraint cost --trace Twitter --start 1 --end 1

Run Experiments

Usage: python buffer.py (default setting)

must be run with python3

• Run experiment with default Exponential arrival python buffer.py (default setting).
  1. In default setting it will run experiments for exponential arrival.
  2. Memory size is set to 3008 MB.
  3. Workload intensity is set to 20 request per second.
  4. Batch size value in 5 .
  5. Timeout values is 1 second.

-Run with exponential arrival:

python buffer.py --batch_size 5 --time_out 1 --arrival_process exp --inter_arrival 10 --function_name inception-v4 --memory 3008

• Run experiments using a trace

  1. These experiments are conducted to evaluate the performance of the model in terms of latency as well as cost for a workload trace.

  python buffer.py --batch_size 5 --time_out 1 --arrival_process trace --trace_path ./traces/MMPP_arrival --function_name inception-v4 --memory 3008

-- To print the help, try: python buffer.py --help_

Collect logs

• Once the experiments are done three log files are generated for each experiment.

  1. Lambda logs: These logs contains all the information regarding each lambda invocation i.e. print out values in the lambda function, init time, execution time, billing time, memory utilization, exceptions if any and error if any.
  2. Lambda per batch logs: These logs contains information regardin batch i.e. Batch starting time, Batch ending time, Batch size and Batch serivce time.
  3. Lmabda pre request logs: This file contains all the information of each request i.e. arrival time, departure time, latency, and size of batch it was served in.

  All log are collected through cloudwatch default configurations