triton-model-navigator 0.9.0

Features at Glance

The distinct capabilities of the Triton Model Navigator are summarized in the feature matrix:

Documentation

Learn more about the Triton Model Navigator features in documentation.

Prerequisites

Before proceeding with the installation of the Triton Model Navigator, ensure your system meets the following criteria:

• Operating System: Linux (Ubuntu 20.04+ recommended)

• Python: Version 3.8 or newer

• NVIDIA GPU

You can use NGC Containers for PyTorch and TensorFlow which contain all necessary dependencies:

• PyTorch container

• TensorFlow container

Install

The Triton Model Navigator can be installed from pypi.org by running the following command:

pip install -U --extra-index-url https://pypi.ngc.nvidia.com triton-model-navigator[<extras,>]

Installing with PyTorch extras:

pip install -U --extra-index-url https://pypi.ngc.nvidia.com triton-model-navigator[torch]

Installing with TensorFlow extras:

pip install -U --extra-index-url https://pypi.ngc.nvidia.com triton-model-navigator[tensorflow]

Optimize Stable Diffusion with Inplace

The Inplace Optimize allows seamless optimization of models for deployment, such as converting them to TensorRT, without requiring any changes to the original Python pipelines.

For the Stable Diffusion model, initialize the pipeline and wrap the model components with nav.Module:

import model_navigator as nav
from transformers.modeling_outputs import BaseModelOutputWithPooling
from diffusers import DPMSolverMultistepScheduler, StableDiffusionPipeline


def get_pipeline():
    # Initialize Stable Diffusion pipeline and wrap modules for optimization
    pipe = StableDiffusionPipeline.from_pretrained("stabilityai/stable-diffusion-2-1")
    pipe.scheduler = DPMSolverMultistepScheduler.from_config(pipe.scheduler.config)
    pipe = pipe.to("cuda")

    pipe.text_encoder = nav.Module(
        pipe.text_encoder,
        name="clip",
        output_mapping=lambda output: BaseModelOutputWithPooling(**output),
    )
    pipe.unet = nav.Module(
        pipe.unet,
        name="unet",
    )
    pipe.vae.decoder = nav.Module(
        pipe.vae.decoder,
        name="vae",
    )

    return pipe

Prepare a simple dataloader:

def get_dataloader():
    # Please mind, the first element in tuple need to be a batch size
    return [(1, "a photo of an astronaut riding a horse on mars")]

Execute model optimization:

pipe = get_pipeline()
dataloader = get_dataloader()

nav.optimize(pipe, dataloader)

Once the pipeline has been optimized, you can load explicit the most performant version of the modules executing:

nav.load_optimized()

After executing this method, when the optimized version of module exists, it will be used in your pipeline execution directly in Python. The example how to serve Stable Diffusion pipeline through PyTriton can be found here.

Optimize ResNET and deploy on Triton

The Triton Model Navigator also supports an optimization path for deployment on Triton. This path is supported for nn.Module, keras.Model or ONNX files which inputs are tensors.

To optimize ResNet50 model from TorchHub run the following code:

import torch
import model_navigator as nav

# Optimize Torch model loaded from TorchHub
package = nav.torch.optimize(
    model=torch.hub.load('NVIDIA/DeepLearningExamples:torchhub', 'nvidia_resnet50', pretrained=True).eval(),
    dataloader=[torch.randn(1, 3, 256, 256) for _ in range(10)],
)

Once optimization is done, creating a model store for deployment on Triton is simple as following code:

import pathlib

# Generate the model store from optimized model
nav.triton.model_repository.add_model_from_package(
    model_repository_path=pathlib.Path("model_repository"),
    model_name="resnet50",
    package=package,
    strategy=nav.MaxThroughputStrategy(),
)

Profile any model or callable in Python

The Triton Model Navigator enhances models and pipelines and provides a uniform method for profiling any Python function, callable, or model. At present, our support is limited strictly to static batch profiling scenarios.

As an example, we will use a simple function that simply sleeps for 50 ms:

import time


def custom_fn(input_):
    # wait 50ms
    time.sleep(0.05)
    return input_

Let’s provide a dataloader we will use for profiling:

# Tuple of batch size and data sample
dataloader = [(1, ["This is example input"])]

Finally, run the profiling of the function with prepared dataloader:

nav.profile(custom_fn, dataloader)

Examples

We offer comprehensive, step-by-step guides that showcase the utilization of the Triton Model Navigator’s diverse features. These guides are designed to elucidate the processes of optimization, profiling, testing, and deployment of models using PyTriton and Triton Inference Server.

Links

• Documentation: https://triton-inference-server.github.io/model_navigator

• Source: https://github.com/triton-inference-server/model_navigator

• Issues: https://github.com/triton-inference-server/model_navigator/issues

• Examples: https://github.com/triton-inference-server/model_navigator/tree/main/examples.

• Changelog: https://github.com/triton-inference-server/model_navigator/blob/main/CHANGELOG.md

• Known Issues: https://github.com/triton-inference-server/model_navigator/blob/main/docs/known_issues.md

• Contributing: https://github.com/triton-inference-server/model_navigator/blob/main/CONTRIBUTING.md