Classification (TF2) with TAO Deploy

TF2 Classification ONNX file generated from tao export is taken as an input to tao deploy to generate optimized TensorRT engine. For more information about training the TF2 Classification, please refer to TF2 Classification training documentation.

Same spec file can be used with the tao model classification_tf2 export command.

GenTrtEngine Config

The gen_trt_engine configuration contains the parameters of exporting a .onnx model to TensorRT engine, which can be used for deployment.

Field Description Data Type and Constraints Recommended/Typical Value
onnx_file The path to the exported .onnx model string
trt_engine The path where the generated engine will be stored string
results_dir Directory to save the output log. If not specified log will be saved under global $results_dir/gen_trt_engine string
tensorrt TensorRT config Dict

The tensorrt configuration contains specification of the TensorRT engine and calibration requirements. +——————————+———————————————————————-+——————————-+——————————-+ | Field | Description | Data Type and Constraints | Recommended/Typical Value | +——————————+———————————————————————-+——————————-+——————————-+ | data_type | The precision to be used for the TensorRT engine | string | FP32 | +——————————+———————————————————————-+——————————-+——————————-+ | min_batch_size | The minimum batch size used for optimization profile shape | unsigned int | 1 | +——————————+———————————————————————-+——————————-+——————————-+ | opt_batch_size | The optimal batch size used for optimization profile shape | unsigned int | 1 | +——————————+———————————————————————-+——————————-+——————————-+ | max_batch_size | The maximum batch size used for optimization profile shape | unsigned int | 1 | +——————————+———————————————————————-+——————————-+——————————-+ | max_workspace_size | The maximum workspace size for the TensorRT engine | unsigned int | 2 | +——————————+———————————————————————-+——————————-+——————————-+ | calibration | Calibration config | Dict | | +——————————+———————————————————————-+——————————-+——————————-+

The calibration configuration specifies the location of the calibration data and where to save the calibration cache file. +——————————+———————————————————————-+——————————-+——————————-+ | Field | Description | Data Type and Constraints | Recommended/Typical Value | +——————————+———————————————————————-+——————————-+——————————-+ | cal_image_dir | The directory containing images to be used for calibration | string | | +——————————+———————————————————————-+——————————-+——————————-+ | cal_cache_file | The path to calibration cache file | string | | +——————————+———————————————————————-+——————————-+——————————-+ | cal_batches | The number of batches to be iterated for calibration | unsigned int | 10 | +——————————+———————————————————————-+——————————-+——————————-+ | cal_batch_size | The batch size for each batch | unsigned int | 1 | +——————————+———————————————————————-+——————————-+——————————-+ | cal_data_file | The path to calibration data file | string | | +——————————+———————————————————————-+——————————-+——————————-+

Below is a sample spec file for TF2 classification.

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results_dir: '/results' dataset: num_classes: 20 train_dataset_path: "/workspace/tao-experiments/data/split/train" val_dataset_path: "/workspace/tao-experiments/data/split/val" preprocess_mode: 'torch' augmentation: enable_color_augmentation: True enable_center_crop: True train: qat: False checkpoint: '' batch_size_per_gpu: 64 num_epochs: 80 optim_config: optimizer: 'sgd' lr_config: scheduler: 'cosine' learning_rate: 0.05 soft_start: 0.05 reg_config: type: 'L2' scope: ['conv2d', 'dense'] weight_decay: 0.00005 model: backbone: 'efficientnet-b0' input_width: 256 input_height: 256 input_channels: 3 input_image_depth: 8 evaluate: dataset_path: '/workspace/tao-experiments/data/split/test' checkpoint: '' trt_engine: '/results/efficientnet-b0.fp32.engine' top_k: 3 batch_size: 256 n_workers: 8 inference: checkpoint: '' trt_engine: '/results/efficientnet-b0.fp32.engine' image_dir: '/workspace/tao-experiments/data/split/test/aeroplane' classmap: '/results/train/classmap.json' export: checkpoint: '' onnx_file: '/results/efficientnet-b0.onnx' gen_trt_engine: onnx_file: '/results/efficientnet-b0.onnx' trt_engine: '/results/efficientnet-b0.fp32.engine' tensorrt: data_type: "fp32" max_workspace_size: 4 max_batch_size: 16 calibration: cal_image_dir: '/workspace/tao-experiments/data/split/test' cal_data_file: '/results/calib.tensorfile' cal_cache_file: '/results/cal.bin' cal_batches: 10

Use the following command to run TF2 Classification engine generation:

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tao deploy classification_tf2 gen_trt_engine -e /path/to/spec.yaml \ export.onnx_file=/path/to/onnx/file \ export.trt_engine=/path/to/engine/file \ export.tensorrt.data_type=<data_type>


Required Arguments

  • -e, --experiment_spec: The experiment spec file to set up the TensorRT engine generation. This should be the same as the export specification file.

Optional Arguments

  • -h, --help: Show this help message and exit.

  • -k, --key: A user-specific encoding key to load a .etlt model.

  • -r, --results_dir: A global result directory where the experiment outputs and log would be written under <task> subdirectory.

Sample Usage

Here’s an example of using the gen_trt_engine command to generate FP16 TensorRT engine:

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tao deploy classification_tf2 gen_trt_engine -e $DEFAULT_SPEC export.onnx_file=$ONNX_FILE \ export.trt_engine=$ENGINE_FILE \ export.tensorrt.data_type=fp16


Same spec file as TAO evaluation spec file.

Use the following command to run TF2 Classification engine evaluation:

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tao deploy classification_tf2 evaluate -e /path/to/spec.yaml \ evaluate.trt_engine=/path/to/engine/file \ evaluate.results_dir=/path/to/outputs

Required Arguments

  • -e, --experiment_spec: The experiment spec file for evaluation. This should be the same as the tao evaluate specification file.

Optional Arguments

  • -h, --help: Show this help message and exit.

  • -k, --key: A user-specific encoding key to load a .etlt model.

  • -r, --results_dir: A global result directory where the experiment outputs and log would be written under <task> subdirectory.

Sample Usage

Here’s an example of using the evaluate command to run evaluation with the TensorRT engine:

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tao deploy classification_tf2 evaluate -e $DEFAULT_SPEC evaluate.trt_engine=$ENGINE_FILE \ results_dir=$RESULTS_DIR


Same spec file as TAO inference spec file.

Use the following command to run TF2 Classification engine inference:

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tao deploy classification_tf2 inference -e /path/to/spec.yaml \ inference.trt_engine=/path/to/engine/file \ results_dir=/path/to/outputs

Required Arguments

  • -e, --experiment_spec: The experiment spec file for inference. This should be the same as the tao inference specification file.

Optional Arguments

  • -h, --help: Show this help message and exit.

  • -k, --key: A user-specific encoding key to load a .etlt model.

  • -r, --results_dir: A global result directory where the experiment outputs and log would be written under <task> subdirectory.

Sample Usage

Here’s an example of using the inference command to run inference with the TensorRT engine:

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tao deploy classification_tf2 inference -e $DEFAULT_SPEC inference.trt_engine=$ENGINE_FILE \ inference.results_dir=$RESULTS_DIR

The csv predictions will be stored under $RESULTS_DIR/result.csv.

© Copyright 2023, NVIDIA.. Last updated on Dec 8, 2023.