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ResNet101 V1 Int8 inference - Advanced Instructions

This document has advanced instructions for running ResNet101 V1 Int8 inference, which provides more control over the individual parameters that are used. For more information on using /benchmarks/launch_benchmark.py, see the launch benchmark documentation.

Prior to using these instructions, please follow the setup instructions from the model's README and/or the AI Kit documentation to get your environment setup (if running on bare metal) and download the dataset, pretrained model, etc. If you are using AI Kit, please exclude the --docker-image flag from the commands below, since you will be running the the TensorFlow conda environment instead of docker.

Any of the launch_benchmark.py commands below can be run on bare metal by removing the --docker-image arg. Ensure that you have all of the required prerequisites installed in your environment before running without the docker container.

If you are new to docker and are running into issues with the container, see this document for troubleshooting tips.

Once your environment is setup, navigate to the benchmarks directory of the model zoo and set environment variables pointing to the directory for the dataset, pretrained model frozen graph, and an output directory where log files will be written.

# cd to the benchmarks directory in the model zoo
cd benchmarks

export DATASET_DIR=<path to the dataset>
export OUTPUT_DIR=<directory where log files will be written>
export PRETRAINED_MODEL=<path to the frozen graph that you downloaded>

ResNet101 V1 Int8 inference can be run to test accuracy, batch inference, or online inference. Use one of the following examples below, depending on your use case.

  • For accuracy run the following command that uses the DATASET_DIR, a batch size of 100, and the --accuracy-only flag:
python launch_benchmark.py \
  --model-name resnet101 \
  --precision int8 \
  --mode inference \
  --framework tensorflow \
  --in-graph ${PRETRAINED_MODEL} \
  --data-location ${DATASET_DIR} \
  --output-dir ${OUTPUT_DIR} \
  --accuracy-only \
  --batch-size 100 \
  --socket-id 0 \
  --docker-image intel/intel-optimized-tensorflow:latest
  • When running for performance, it is optional to specify the number of warmup_steps and steps as extra args, as shown in the commands below. If these values are not specified, the script will default to use warmup_steps=40 and steps=100. For batch inference, use the command below that uses the DATASET_DIR, a batch size of 128, warmup_steps=50, and steps=500.
python launch_benchmark.py \
  --model-name resnet101 \
  --precision int8 \
  --mode inference \
  --framework tensorflow \
  --in-graph ${PRETRAINED_MODEL} \
  --data-location ${DATASET_DIR} \
  --output-dir ${OUTPUT_DIR} \
  --batch-size 128 \
  --socket-id 0 \
  --docker-image intel/intel-optimized-tensorflow:latest \
  -- warmup_steps=50 steps=500
  • For online inference, use the command below that uses the DATASET_DIR, a batch size of 1, warmup_steps=50, and steps=500.
python launch_benchmark.py \
  --model-name resnet101 \
  --precision int8 \
  --mode inference \
  --framework tensorflow \
  --in-graph ${PRETRAINED_MODEL} \
  --data-location ${DATASET_DIR} \
  --output-dir ${OUTPUT_DIR} \
  --batch-size 1 \
  --docker-image intel/intel-optimized-tensorflow:latest \
  --socket-id 0 \
  -- warmup_steps=50 steps=500

Example log file snippet when testing accuracy:

Processed 49800 images. (Top1 accuracy, Top5 accuracy) = (0.7690, 0.9304)
Processed 49900 images. (Top1 accuracy, Top5 accuracy) = (0.7691, 0.9305)
Processed 50000 images. (Top1 accuracy, Top5 accuracy) = (0.7691, 0.9305)
Ran inference with batch size 100
Log location outside container: {--output-dir value}/benchmark_resnet101_inference_int8_20190104_205838.log

Example log file snippet when testing batch inference:

...
steps = 470, ... images/sec
steps = 480, ... images/sec
steps = 490, ... images/sec
steps = 500, ... images/sec
Ran inference with batch size 128
Log location outside container: {--output-dir value}/benchmark_resnet101_inference_int8_20190223_192438.log

Example log file snippet when testing online inference:

...
steps = 470, ... images/sec
steps = 480, ... images/sec
steps = 490, ... images/sec
steps = 500, ... images/sec
Ran inference with batch size 1
Log location outside container: {--output-dir value}/benchmark_resnet101_inference_int8_20190223_191406.log