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# Copyright 2019 NVIDIA Corporation. All Rights Reserved.
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# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
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# Unless required by applicable law or agreed to in writing, software
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df1b2a8a92ce4f9fab463924bf8d335d

Torch-TensorRT Getting Started - CitriNet

Overview

Citrinet is an acoustic model used for the speech to text recognition task. It is a version of QuartzNet that extends ContextNet, utilizing subword encoding (via Word Piece tokenization) and Squeeze-and-Excitation(SE) mechanism and are therefore smaller than QuartzNet models.

CitriNet models take in audio segments and transcribe them to letter, byte pair, or word piece sequences.

alt

Learning objectives

This notebook demonstrates the steps for optimizing a pretrained CitriNet model with Torch-TensorRT, and running it to test the speedup obtained.

Content

  1. Requirements

  2. Download Citrinet model

  3. Create Torch-TensorRT modules

  4. Benchmark Torch-TensorRT models

  5. Conclusion

## 1. Requirements

Follow the steps in README to prepare a Docker container, within which you can run this notebook. This notebook assumes that you are within a Jupyter environment in a docker container with Torch-TensorRT installed, such as an NGC monthly release of nvcr.io/nvidia/pytorch:<yy.mm>-py3 (where yy indicates the last two numbers of a calendar year, and mm indicates the month in two-digit numerical form)

Now that you are in the docker, the next step is to install the required dependencies.

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# Install dependencies
!pip install wget
!apt-get update && DEBIAN_FRONTEND=noninteractive  apt-get install -y libsndfile1 ffmpeg
!pip install Cython

## Install NeMo
!pip install nemo_toolkit[all]==1.5.1

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Requirement already satisfied: prompt-toolkit!=3.0.0,!=3.0.1,<3.1.0,>=2.0.0 in /opt/conda/lib/python3.8/site-packages (from ipython>=4.0.0->ipywidgets->nemo_toolkit[all]==1.5.1) (3.0.27)
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Requirement already satisfied: entrypoints in /opt/conda/lib/python3.8/site-packages (from jupyter-client<8.0->ipykernel>=4.5.1->ipywidgets->nemo_toolkit[all]==1.5.1) (0.4)
Requirement already satisfied: pyzmq>=13 in /opt/conda/lib/python3.8/site-packages (from jupyter-client<8.0->ipykernel>=4.5.1->ipywidgets->nemo_toolkit[all]==1.5.1) (22.3.0)
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Requirement already satisfied: pyrsistent!=0.17.0,!=0.17.1,!=0.17.2,>=0.14.0 in /opt/conda/lib/python3.8/site-packages (from jsonschema!=2.5.0,>=2.4->nbformat>=4.2.0->ipywidgets->nemo_toolkit[all]==1.5.1) (0.18.1)
Requirement already satisfied: ptyprocess>=0.5 in /opt/conda/lib/python3.8/site-packages (from pexpect>4.3->ipython>=4.0.0->ipywidgets->nemo_toolkit[all]==1.5.1) (0.7.0)
Requirement already satisfied: wcwidth in /opt/conda/lib/python3.8/site-packages (from prompt-toolkit!=3.0.0,!=3.0.1,<3.1.0,>=2.0.0->ipython>=4.0.0->ipywidgets->nemo_toolkit[all]==1.5.1) (0.2.5)
Requirement already satisfied: notebook>=4.4.1 in /opt/conda/lib/python3.8/site-packages (from widgetsnbextension~=3.6.0->ipywidgets->nemo_toolkit[all]==1.5.1) (6.4.1)
Requirement already satisfied: Send2Trash>=1.5.0 in /opt/conda/lib/python3.8/site-packages (from notebook>=4.4.1->widgetsnbextension~=3.6.0->ipywidgets->nemo_toolkit[all]==1.5.1) (1.8.0)
Requirement already satisfied: prometheus-client in /opt/conda/lib/python3.8/site-packages (from notebook>=4.4.1->widgetsnbextension~=3.6.0->ipywidgets->nemo_toolkit[all]==1.5.1) (0.13.1)
Requirement already satisfied: terminado>=0.8.3 in /opt/conda/lib/python3.8/site-packages (from notebook>=4.4.1->widgetsnbextension~=3.6.0->ipywidgets->nemo_toolkit[all]==1.5.1) (0.13.3)
Requirement already satisfied: jinja2 in /opt/conda/lib/python3.8/site-packages (from notebook>=4.4.1->widgetsnbextension~=3.6.0->ipywidgets->nemo_toolkit[all]==1.5.1) (3.0.3)
Requirement already satisfied: nbconvert in /opt/conda/lib/python3.8/site-packages (from notebook>=4.4.1->widgetsnbextension~=3.6.0->ipywidgets->nemo_toolkit[all]==1.5.1) (6.4.4)
Requirement already satisfied: argon2-cffi in /opt/conda/lib/python3.8/site-packages (from notebook>=4.4.1->widgetsnbextension~=3.6.0->ipywidgets->nemo_toolkit[all]==1.5.1) (21.3.0)
Requirement already satisfied: argon2-cffi-bindings in /opt/conda/lib/python3.8/site-packages (from argon2-cffi->notebook>=4.4.1->widgetsnbextension~=3.6.0->ipywidgets->nemo_toolkit[all]==1.5.1) (21.2.0)
Requirement already satisfied: cffi>=1.0.1 in /opt/conda/lib/python3.8/site-packages (from argon2-cffi-bindings->argon2-cffi->notebook>=4.4.1->widgetsnbextension~=3.6.0->ipywidgets->nemo_toolkit[all]==1.5.1) (1.15.0)
Requirement already satisfied: pycparser in /opt/conda/lib/python3.8/site-packages (from cffi>=1.0.1->argon2-cffi-bindings->argon2-cffi->notebook>=4.4.1->widgetsnbextension~=3.6.0->ipywidgets->nemo_toolkit[all]==1.5.1) (2.21)
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Requirement already satisfied: resampy>=0.2.2 in /opt/conda/lib/python3.8/site-packages (from librosa->nemo_toolkit[all]==1.5.1) (0.2.2)
Requirement already satisfied: pooch>=1.0 in /opt/conda/lib/python3.8/site-packages (from librosa->nemo_toolkit[all]==1.5.1) (1.6.0)
Requirement already satisfied: audioread>=2.1.5 in /opt/conda/lib/python3.8/site-packages (from librosa->nemo_toolkit[all]==1.5.1) (2.1.9)
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Requirement already satisfied: threadpoolctl>=2.0.0 in /opt/conda/lib/python3.8/site-packages (from scikit-learn->nemo_toolkit[all]==1.5.1) (3.1.0)
Requirement already satisfied: defusedxml in /opt/conda/lib/python3.8/site-packages (from nbconvert->notebook>=4.4.1->widgetsnbextension~=3.6.0->ipywidgets->nemo_toolkit[all]==1.5.1) (0.7.1)
Requirement already satisfied: nbclient<0.6.0,>=0.5.0 in /opt/conda/lib/python3.8/site-packages (from nbconvert->notebook>=4.4.1->widgetsnbextension~=3.6.0->ipywidgets->nemo_toolkit[all]==1.5.1) (0.5.13)
Requirement already satisfied: bleach in /opt/conda/lib/python3.8/site-packages (from nbconvert->notebook>=4.4.1->widgetsnbextension~=3.6.0->ipywidgets->nemo_toolkit[all]==1.5.1) (4.1.0)
Requirement already satisfied: mistune<2,>=0.8.1 in /opt/conda/lib/python3.8/site-packages (from nbconvert->notebook>=4.4.1->widgetsnbextension~=3.6.0->ipywidgets->nemo_toolkit[all]==1.5.1) (0.8.4)
Requirement already satisfied: pandocfilters>=1.4.1 in /opt/conda/lib/python3.8/site-packages (from nbconvert->notebook>=4.4.1->widgetsnbextension~=3.6.0->ipywidgets->nemo_toolkit[all]==1.5.1) (1.5.0)
Requirement already satisfied: testpath in /opt/conda/lib/python3.8/site-packages (from nbconvert->notebook>=4.4.1->widgetsnbextension~=3.6.0->ipywidgets->nemo_toolkit[all]==1.5.1) (0.6.0)
Requirement already satisfied: jupyterlab-pygments in /opt/conda/lib/python3.8/site-packages (from nbconvert->notebook>=4.4.1->widgetsnbextension~=3.6.0->ipywidgets->nemo_toolkit[all]==1.5.1) (0.1.2)
Requirement already satisfied: webencodings in /opt/conda/lib/python3.8/site-packages (from bleach->nbconvert->notebook>=4.4.1->widgetsnbextension~=3.6.0->ipywidgets->nemo_toolkit[all]==1.5.1) (0.5.1)
Requirement already satisfied: pytz>=2017.3 in /opt/conda/lib/python3.8/site-packages (from pandas->nemo_toolkit[all]==1.5.1) (2021.3)
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Requirement already satisfied: simplejson>=3.8.1 in /opt/conda/lib/python3.8/site-packages (from pyannote.core->nemo_toolkit[all]==1.5.1) (3.17.6)
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Requirement already satisfied: pyannote.database>=4.0.1 in /opt/conda/lib/python3.8/site-packages (from pyannote.metrics->nemo_toolkit[all]==1.5.1) (4.1.3)
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Requirement already satisfied: mpmath>=0.19 in /opt/conda/lib/python3.8/site-packages (from sympy>=1.1->pyannote.metrics->nemo_toolkit[all]==1.5.1) (1.2.1)
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Requirement already satisfied: iniconfig in /opt/conda/lib/python3.8/site-packages (from pytest->nemo_toolkit[all]==1.5.1) (1.1.1)
Requirement already satisfied: pluggy<2.0,>=0.12 in /opt/conda/lib/python3.8/site-packages (from pytest->nemo_toolkit[all]==1.5.1) (1.0.0)
Requirement already satisfied: jarowinkler<1.1.0,>=1.0.2 in /opt/conda/lib/python3.8/site-packages (from rapidfuzz->nemo_toolkit[all]==1.5.1) (1.0.2)
Requirement already satisfied: PySocks!=1.5.7,>=1.5.6 in /opt/conda/lib/python3.8/site-packages (from requests->fsspec[http]!=2021.06.0,>=2021.05.0->pytorch-lightning>=1.5.0->nemo_toolkit[all]==1.5.1) (1.7.1)
Requirement already satisfied: ruamel.yaml.clib>=0.2.6 in /opt/conda/lib/python3.8/site-packages (from ruamel.yaml->nemo_toolkit[all]==1.5.1) (0.2.6)
Requirement already satisfied: portalocker in /opt/conda/lib/python3.8/site-packages (from sacrebleu[ja]->nemo_toolkit[all]==1.5.1) (2.4.0)
Requirement already satisfied: ipadic<2.0,>=1.0 in /opt/conda/lib/python3.8/site-packages (from sacrebleu[ja]->nemo_toolkit[all]==1.5.1) (1.0.0)
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Requirement already satisfied: alabaster<0.8,>=0.7 in /opt/conda/lib/python3.8/site-packages (from sphinx->nemo_toolkit[all]==1.5.1) (0.7.12)
Requirement already satisfied: babel>=1.3 in /opt/conda/lib/python3.8/site-packages (from sphinx->nemo_toolkit[all]==1.5.1) (2.9.1)
Requirement already satisfied: sphinxcontrib-serializinghtml>=1.1.5 in /opt/conda/lib/python3.8/site-packages (from sphinx->nemo_toolkit[all]==1.5.1) (1.1.5)
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Requirement already satisfied: sphinxcontrib-jsmath in /opt/conda/lib/python3.8/site-packages (from sphinx->nemo_toolkit[all]==1.5.1) (1.0.1)
Requirement already satisfied: sphinxcontrib-qthelp in /opt/conda/lib/python3.8/site-packages (from sphinx->nemo_toolkit[all]==1.5.1) (1.0.3)
Requirement already satisfied: snowballstemmer>=1.1 in /opt/conda/lib/python3.8/site-packages (from sphinx->nemo_toolkit[all]==1.5.1) (2.2.0)
Requirement already satisfied: imagesize in /opt/conda/lib/python3.8/site-packages (from sphinx->nemo_toolkit[all]==1.5.1) (1.3.0)
Requirement already satisfied: sphinxcontrib-applehelp in /opt/conda/lib/python3.8/site-packages (from sphinx->nemo_toolkit[all]==1.5.1) (1.0.2)
Requirement already satisfied: docutils<0.18,>=0.14 in /opt/conda/lib/python3.8/site-packages (from sphinx->nemo_toolkit[all]==1.5.1) (0.17.1)
Requirement already satisfied: pybtex-docutils>=1.0.0 in /opt/conda/lib/python3.8/site-packages (from sphinxcontrib-bibtex->nemo_toolkit[all]==1.5.1) (1.0.1)
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Requirement already satisfied: pure-eval in /opt/conda/lib/python3.8/site-packages (from stack-data->ipython>=4.0.0->ipywidgets->nemo_toolkit[all]==1.5.1) (0.2.2)
Requirement already satisfied: asttokens in /opt/conda/lib/python3.8/site-packages (from stack-data->ipython>=4.0.0->ipywidgets->nemo_toolkit[all]==1.5.1) (2.0.5)
Requirement already satisfied: executing in /opt/conda/lib/python3.8/site-packages (from stack-data->ipython>=4.0.0->ipywidgets->nemo_toolkit[all]==1.5.1) (0.8.3)
Requirement already satisfied: pathtools in /opt/conda/lib/python3.8/site-packages (from wandb->nemo_toolkit[all]==1.5.1) (0.1.2)
Requirement already satisfied: setproctitle in /opt/conda/lib/python3.8/site-packages (from wandb->nemo_toolkit[all]==1.5.1) (1.2.3)
Requirement already satisfied: GitPython>=1.0.0 in /opt/conda/lib/python3.8/site-packages (from wandb->nemo_toolkit[all]==1.5.1) (3.1.27)
Requirement already satisfied: sentry-sdk>=1.0.0 in /opt/conda/lib/python3.8/site-packages (from wandb->nemo_toolkit[all]==1.5.1) (1.5.10)
Requirement already satisfied: shortuuid>=0.5.0 in /opt/conda/lib/python3.8/site-packages (from wandb->nemo_toolkit[all]==1.5.1) (1.0.8)
Requirement already satisfied: docker-pycreds>=0.4.0 in /opt/conda/lib/python3.8/site-packages (from wandb->nemo_toolkit[all]==1.5.1) (0.4.0)
Requirement already satisfied: promise<3,>=2.0 in /opt/conda/lib/python3.8/site-packages (from wandb->nemo_toolkit[all]==1.5.1) (2.3)
Requirement already satisfied: gitdb<5,>=4.0.1 in /opt/conda/lib/python3.8/site-packages (from GitPython>=1.0.0->wandb->nemo_toolkit[all]==1.5.1) (4.0.9)
Requirement already satisfied: smmap<6,>=3.0.1 in /opt/conda/lib/python3.8/site-packages (from gitdb<5,>=4.0.1->GitPython>=1.0.0->wandb->nemo_toolkit[all]==1.5.1) (5.0.0)
WARNING: Running pip as the 'root' user can result in broken permissions and conflicting behaviour with the system package manager. It is recommended to use a virtual environment instead: https://pip.pypa.io/warnings/venv

## 2. Download Citrinet model

Next, we download a pretrained Nemo Citrinet model and convert it to a Torchscript module:

[3]:

import nemo
import torch

import nemo.collections.asr as nemo_asr
from nemo.core import typecheck
typecheck.set_typecheck_enabled(False)

[4]:

variant = 'stt_en_citrinet_256'

print(f"Downloading and saving {variant}...")
asr_model = nemo_asr.models.EncDecCTCModelBPE.from_pretrained(model_name=variant)
asr_model.export(f"{variant}.ts")

Downloading and saving stt_en_citrinet_256...
[NeMo I 2022-04-21 23:12:45 cloud:56] Found existing object /root/.cache/torch/NeMo/NeMo_1.5.1/stt_en_citrinet_256/91a9cc5850784b2065e8a0aa3d526fd9/stt_en_citrinet_256.nemo.
[NeMo I 2022-04-21 23:12:45 cloud:62] Re-using file from: /root/.cache/torch/NeMo/NeMo_1.5.1/stt_en_citrinet_256/91a9cc5850784b2065e8a0aa3d526fd9/stt_en_citrinet_256.nemo
[NeMo I 2022-04-21 23:12:45 common:728] Instantiating model from pre-trained checkpoint
[NeMo I 2022-04-21 23:12:46 mixins:146] Tokenizer SentencePieceTokenizer initialized with 1024 tokens

[NeMo W 2022-04-21 23:12:47 modelPT:130] If you intend to do training or fine-tuning, please call the ModelPT.setup_training_data() method and provide a valid configuration file to setup the train data loader.
    Train config :
    manifest_filepath: null
    sample_rate: 16000
    batch_size: 32
    trim_silence: true
    max_duration: 16.7
    shuffle: true
    is_tarred: false
    tarred_audio_filepaths: null
    use_start_end_token: false

[NeMo W 2022-04-21 23:12:47 modelPT:137] If you intend to do validation, please call the ModelPT.setup_validation_data() or ModelPT.setup_multiple_validation_data() method and provide a valid configuration file to setup the validation data loader(s).
    Validation config :
    manifest_filepath: null
    sample_rate: 16000
    batch_size: 32
    shuffle: false
    use_start_end_token: false

[NeMo W 2022-04-21 23:12:47 modelPT:143] Please call the ModelPT.setup_test_data() or ModelPT.setup_multiple_test_data() method and provide a valid configuration file to setup the test data loader(s).
    Test config :
    manifest_filepath: null
    sample_rate: 16000
    batch_size: 32
    shuffle: false
    use_start_end_token: false


[NeMo I 2022-04-21 23:12:47 features:265] PADDING: 16
[NeMo I 2022-04-21 23:12:47 features:282] STFT using torch

[NeMo W 2022-04-21 23:12:47 nemo_logging:349] /opt/conda/lib/python3.8/site-packages/nemo/collections/asr/parts/preprocessing/features.py:315: FutureWarning: Pass sr=16000, n_fft=512 as keyword args. From version 0.10 passing these as positional arguments will result in an error
      librosa.filters.mel(sample_rate, self.n_fft, n_mels=nfilt, fmin=lowfreq, fmax=highfreq), dtype=torch.float


[NeMo I 2022-04-21 23:12:49 save_restore_connector:149] Model EncDecCTCModelBPE was successfully restored from /root/.cache/torch/NeMo/NeMo_1.5.1/stt_en_citrinet_256/91a9cc5850784b2065e8a0aa3d526fd9/stt_en_citrinet_256.nemo.

[NeMo W 2022-04-21 23:12:49 export_utils:198] Swapped 0 modules
[NeMo W 2022-04-21 23:12:49 conv_asr:73] Turned off 235 masked convolutions
[NeMo W 2022-04-21 23:12:49 export_utils:198] Swapped 0 modules
[NeMo W 2022-04-21 23:12:50 nemo_logging:349] /opt/conda/lib/python3.8/site-packages/torch/jit/_trace.py:916: UserWarning: `optimize` is deprecated and has no effect. Use `with torch.jit.optimized_execution() instead
      warnings.warn(

[NeMo W 2022-04-21 23:12:50 nemo_logging:349] /opt/conda/lib/python3.8/site-packages/torch/_jit_internal.py:668: LightningDeprecationWarning: The `LightningModule.model_size` property was deprecated in v1.5 and will be removed in v1.7. Please use the `pytorch_lightning.utilities.memory.get_model_size_mb`.
      if hasattr(mod, name):

[NeMo W 2022-04-21 23:12:50 nemo_logging:349] /opt/conda/lib/python3.8/site-packages/torch/_jit_internal.py:669: LightningDeprecationWarning: The `LightningModule.model_size` property was deprecated in v1.5 and will be removed in v1.7. Please use the `pytorch_lightning.utilities.memory.get_model_size_mb`.
      item = getattr(mod, name)

[NeMo W 2022-04-21 23:12:50 nemo_logging:349] /opt/conda/lib/python3.8/site-packages/torch/_jit_internal.py:668: LightningDeprecationWarning: `LightningModule.use_amp` was deprecated in v1.6 and will be removed in v1.8. Please use `Trainer.amp_backend`.
      if hasattr(mod, name):

[NeMo W 2022-04-21 23:12:50 nemo_logging:349] /opt/conda/lib/python3.8/site-packages/torch/_jit_internal.py:669: LightningDeprecationWarning: `LightningModule.use_amp` was deprecated in v1.6 and will be removed in v1.8. Please use `Trainer.amp_backend`.
      item = getattr(mod, name)


[4]:

(['stt_en_citrinet_256.ts'],
 ['nemo.collections.asr.models.ctc_bpe_models.EncDecCTCModelBPE exported to ONNX'])

Benchmark utility

Let us define a helper benchmarking function, then benchmark the original Pytorch model.

[5]:

from __future__ import print_function
from __future__ import absolute_import
from __future__ import division

import argparse
import timeit
import numpy as np
import torch
import torch_tensorrt as trtorch
import torch.backends.cudnn as cudnn

def benchmark(model, input_tensor, num_loops, model_name, batch_size):
    def timeGraph(model, input_tensor, num_loops):
        print("Warm up ...")
        with torch.no_grad():
            for _ in range(20):
                features = model(input_tensor)

        torch.cuda.synchronize()
        print("Start timing ...")
        timings = []
        with torch.no_grad():
            for i in range(num_loops):
                start_time = timeit.default_timer()
                features = model(input_tensor)
                torch.cuda.synchronize()
                end_time = timeit.default_timer()
                timings.append(end_time - start_time)
                # print("Iteration {}: {:.6f} s".format(i, end_time - start_time))
        return timings
    def printStats(graphName, timings, batch_size):
        times = np.array(timings)
        steps = len(times)
        speeds = batch_size / times
        time_mean = np.mean(times)
        time_med = np.median(times)
        time_99th = np.percentile(times, 99)
        time_std = np.std(times, ddof=0)
        speed_mean = np.mean(speeds)
        speed_med = np.median(speeds)
        msg = ("\n%s =================================\n"
                "batch size=%d, num iterations=%d\n"
                "  Median samples/s: %.1f, mean: %.1f\n"
                "  Median latency (s): %.6f, mean: %.6f, 99th_p: %.6f, std_dev: %.6f\n"
                ) % (graphName,
                    batch_size, steps,
                    speed_med, speed_mean,
                    time_med, time_mean, time_99th, time_std)
        print(msg)
    timings = timeGraph(model, input_tensor, num_loops)
    printStats(model_name, timings, batch_size)

precisions_str = 'fp32' # Precision (default=fp32, fp16)
variant = 'stt_en_citrinet_256' # Nemo Citrinet variant
batch_sizes = [1, 8, 32, 128] # Batch sizes (default=1,8,32,128)
trt = False # If True, infer with Torch-TensorRT engine. Else, infer with Pytorch model.
precision = torch.float32 if precisions_str =='fp32' else torch.float16

for batch_size in batch_sizes:
    if trt:
        model_name = f"{variant}_bs{batch_size}_{precision}.torch-tensorrt"
    else:
        model_name = f"{variant}.ts"

    print(f"Loading model: {model_name}")
    # Load traced model to CPU first
    model = torch.jit.load(model_name).cuda()
    cudnn.benchmark = True
    # Create random input tensor of certain size
    torch.manual_seed(12345)
    input_shape=(batch_size, 80, 1488)
    input_tensor = torch.randn(input_shape).cuda()

    # Timing graph inference
    benchmark(model, input_tensor, 50, model_name, batch_size)

Loading model: stt_en_citrinet_256.ts
Warm up ...
Start timing ...

stt_en_citrinet_256.ts =================================
batch size=1, num iterations=50
  Median samples/s: 102.0, mean: 102.0
  Median latency (s): 0.009802, mean: 0.009803, 99th_p: 0.009836, std_dev: 0.000014

Loading model: stt_en_citrinet_256.ts
Warm up ...
Start timing ...

stt_en_citrinet_256.ts =================================
batch size=8, num iterations=50
  Median samples/s: 429.1, mean: 429.1
  Median latency (s): 0.018642, mean: 0.018643, 99th_p: 0.018670, std_dev: 0.000014

Loading model: stt_en_citrinet_256.ts
Warm up ...
Start timing ...

stt_en_citrinet_256.ts =================================
batch size=32, num iterations=50
  Median samples/s: 551.3, mean: 551.2
  Median latency (s): 0.058047, mean: 0.058053, 99th_p: 0.058375, std_dev: 0.000106

Loading model: stt_en_citrinet_256.ts
Warm up ...
Start timing ...

stt_en_citrinet_256.ts =================================
batch size=128, num iterations=50
  Median samples/s: 594.1, mean: 594.1
  Median latency (s): 0.215434, mean: 0.215446, 99th_p: 0.215806, std_dev: 0.000116

Confirming the GPU we are using here:

[6]:

!nvidia-smi

Thu Apr 21 23:13:32 2022
+-----------------------------------------------------------------------------+
| NVIDIA-SMI 510.47.03    Driver Version: 510.47.03    CUDA Version: 11.6     |
|-------------------------------+----------------------+----------------------+
| GPU  Name        Persistence-M| Bus-Id        Disp.A | Volatile Uncorr. ECC |
| Fan  Temp  Perf  Pwr:Usage/Cap|         Memory-Usage | GPU-Util  Compute M. |
|                               |                      |               MIG M. |
|===============================+======================+======================|
|   0  NVIDIA TITAN V      On   | 00000000:17:00.0 Off |                  N/A |
| 38%   55C    P2    42W / 250W |   2462MiB / 12288MiB |      0%      Default |
|                               |                      |                  N/A |
+-------------------------------+----------------------+----------------------+
|   1  NVIDIA TITAN V      On   | 00000000:65:00.0 Off |                  N/A |
| 28%   39C    P8    26W / 250W |    112MiB / 12288MiB |      0%      Default |
|                               |                      |                  N/A |
+-------------------------------+----------------------+----------------------+

+-----------------------------------------------------------------------------+
| Processes:                                                                  |
|  GPU   GI   CI        PID   Type   Process name                  GPU Memory |
|        ID   ID                                                   Usage      |
|=============================================================================|
|    0   N/A  N/A      3909      G                                       4MiB |
|    0   N/A  N/A      6047      C                                    2453MiB |
|    1   N/A  N/A      3909      G                                      39MiB |
|    1   N/A  N/A      4161      G                                      67MiB |
+-----------------------------------------------------------------------------+

## 3. Create Torch-TensorRT modules

In this step, we optimize the Citrinet Torchscript module with Torch-TensorRT with various precisions and batch sizes.

[10]:

import torch
import torch.nn as nn
import torch_tensorrt as torchtrt
import argparse

variant = "stt_en_citrinet_256"
precisions = [torch.float, torch.half]
batch_sizes = [1,8,32,128]

model = torch.jit.load(f"{variant}.ts")

for precision in precisions:
    for batch_size in batch_sizes:
        compile_settings = {
            "inputs": [torchtrt.Input(shape=[batch_size, 80, 1488])],
            "enabled_precisions": {precision},
            "workspace_size": 2000000000,
            "truncate_long_and_double": True,
        }
        print(f"Generating Torchscript-TensorRT module for batchsize {batch_size} precision {precision}")
        trt_ts_module = torchtrt.compile(model, **compile_settings)
        torch.jit.save(trt_ts_module, f"{variant}_bs{batch_size}_{precision}.torch-tensorrt")

Generating Torchscript-TensorRT module for batchsize 1 precision torch.float32
Generating Torchscript-TensorRT module for batchsize 8 precision torch.float32
Generating Torchscript-TensorRT module for batchsize 32 precision torch.float32
Generating Torchscript-TensorRT module for batchsize 128 precision torch.float32
Generating Torchscript-TensorRT module for batchsize 1 precision torch.float16
Generating Torchscript-TensorRT module for batchsize 8 precision torch.float16
Generating Torchscript-TensorRT module for batchsize 32 precision torch.float16
Generating Torchscript-TensorRT module for batchsize 128 precision torch.float16

## 4. Benchmark Torch-TensorRT models

Finally, we are ready to benchmark the Torch-TensorRT optimized Citrinet models.

FP32 (single precision)

[13]:

precisions_str = 'fp32' # Precision (default=fp32, fp16)
batch_sizes = [1, 8, 32, 128] # Batch sizes (default=1,8,32,128)
precision = torch.float32 if precisions_str =='fp32' else torch.float16
trt = True

for batch_size in batch_sizes:
    if trt:
        model_name = f"{variant}_bs{batch_size}_{precision}.torch-tensorrt"
    else:
        model_name = f"{variant}.ts"

    print(f"Loading model: {model_name}")
    # Load traced model to CPU first
    model = torch.jit.load(model_name).cuda()
    cudnn.benchmark = True
    # Create random input tensor of certain size
    torch.manual_seed(12345)
    input_shape=(batch_size, 80, 1488)
    input_tensor = torch.randn(input_shape).cuda()

    # Timing graph inference
    benchmark(model, input_tensor, 50, model_name, batch_size)

Loading model: stt_en_citrinet_256_bs1_torch.float32.torch-tensorrt
Warm up ...
Start timing ...

stt_en_citrinet_256_bs1_torch.float32.torch-tensorrt =================================
batch size=1, num iterations=50
  Median samples/s: 242.2, mean: 218.0
  Median latency (s): 0.004128, mean: 0.004825, 99th_p: 0.008071, std_dev: 0.001270

Loading model: stt_en_citrinet_256_bs8_torch.float32.torch-tensorrt
Warm up ...
Start timing ...

stt_en_citrinet_256_bs8_torch.float32.torch-tensorrt =================================
batch size=8, num iterations=50
  Median samples/s: 729.9, mean: 709.0
  Median latency (s): 0.010961, mean: 0.011388, 99th_p: 0.016114, std_dev: 0.001256

Loading model: stt_en_citrinet_256_bs32_torch.float32.torch-tensorrt
Warm up ...
Start timing ...

stt_en_citrinet_256_bs32_torch.float32.torch-tensorrt =================================
batch size=32, num iterations=50
  Median samples/s: 955.6, mean: 953.4
  Median latency (s): 0.033488, mean: 0.033572, 99th_p: 0.035722, std_dev: 0.000545

Loading model: stt_en_citrinet_256_bs128_torch.float32.torch-tensorrt
Warm up ...
Start timing ...

stt_en_citrinet_256_bs128_torch.float32.torch-tensorrt =================================
batch size=128, num iterations=50
  Median samples/s: 1065.8, mean: 1069.4
  Median latency (s): 0.120097, mean: 0.119708, 99th_p: 0.121618, std_dev: 0.001260

FP16 (half precision)

[14]:

precisions_str = 'fp16' # Precision (default=fp32, fp16)
batch_sizes = [1, 8, 32, 128] # Batch sizes (default=1,8,32,128)
precision = torch.float32 if precisions_str =='fp32' else torch.float16

for batch_size in batch_sizes:
    if trt:
        model_name = f"{variant}_bs{batch_size}_{precision}.torch-tensorrt"
    else:
        model_name = f"{variant}.ts"

    print(f"Loading model: {model_name}")
    # Load traced model to CPU first
    model = torch.jit.load(model_name).cuda()
    cudnn.benchmark = True
    # Create random input tensor of certain size
    torch.manual_seed(12345)
    input_shape=(batch_size, 80, 1488)
    input_tensor = torch.randn(input_shape).cuda()

    # Timing graph inference
    benchmark(model, input_tensor, 50, model_name, batch_size)

Loading model: stt_en_citrinet_256_bs1_torch.float16.torch-tensorrt
Warm up ...
Start timing ...

stt_en_citrinet_256_bs1_torch.float16.torch-tensorrt =================================
batch size=1, num iterations=50
  Median samples/s: 288.9, mean: 272.9
  Median latency (s): 0.003462, mean: 0.003774, 99th_p: 0.006846, std_dev: 0.000820

Loading model: stt_en_citrinet_256_bs8_torch.float16.torch-tensorrt
Warm up ...
Start timing ...

stt_en_citrinet_256_bs8_torch.float16.torch-tensorrt =================================
batch size=8, num iterations=50
  Median samples/s: 1201.0, mean: 1190.9
  Median latency (s): 0.006661, mean: 0.006733, 99th_p: 0.008453, std_dev: 0.000368

Loading model: stt_en_citrinet_256_bs32_torch.float16.torch-tensorrt
Warm up ...
Start timing ...

stt_en_citrinet_256_bs32_torch.float16.torch-tensorrt =================================
batch size=32, num iterations=50
  Median samples/s: 1538.2, mean: 1516.4
  Median latency (s): 0.020804, mean: 0.021143, 99th_p: 0.024492, std_dev: 0.000973

Loading model: stt_en_citrinet_256_bs128_torch.float16.torch-tensorrt
Warm up ...
Start timing ...

stt_en_citrinet_256_bs128_torch.float16.torch-tensorrt =================================
batch size=128, num iterations=50
  Median samples/s: 1792.0, mean: 1777.0
  Median latency (s): 0.071428, mean: 0.072057, 99th_p: 0.076796, std_dev: 0.001351

## 5. Conclusion

In this notebook, we have walked through the complete process of optimizing the Citrinet model with Torch-TensorRT. On an A100 GPU, with Torch-TensorRT, we observe a speedup of ~2.4X with FP32, and ~2.9X with FP16 at batchsize of 128.

What’s next

Now it’s time to try Torch-TensorRT on your own model. Fill out issues at https://github.com/NVIDIA/Torch-TensorRT. Your involvement will help future development of Torch-TensorRT.

[ ]:

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