feat: Add example usage scripts for dynamo path

- Add sample scripts covering resnet18, transformers, and custom
examples showcasing the `torch_tensorrt.dynamo.compile` path,
which can compile models with data-dependent control flow and other such
restrictions which can make other compilation methods more difficult
- Cover different customizeable features allowed in the new backend
- Make scripts Sphinx-Gallery compatible Python files

Author: gs-olive

.gitignore

@@ -32,6 +32,7 @@ docsrc/_build
 docsrc/_notebooks
 docsrc/_cpp_api
 docsrc/_tmp
+docsrc/tutorials/_rendered_examples
 *.so
 __pycache__
 *.egg-info
@@ -66,4 +67,4 @@ bazel-tensorrt
 *.cache
 *cifar-10-batches-py*
 bazel-project
-build/
+build/

docsrc/conf.py

@@ -47,6 +47,7 @@
     "sphinx.ext.coverage",
     "sphinx.ext.mathjax",
     "sphinx.ext.viewcode",
+    "sphinx_gallery.gen_gallery",
 ]
 
 napoleon_use_ivar = True
@@ -79,6 +80,12 @@
 # so a file named "default.css" will overwrite the builtin "default.css".
 html_static_path = ["_static"]
 
+# sphinx-gallery configuration
+sphinx_gallery_conf = {
+    "examples_dirs": "../examples/dynamo",
+    "gallery_dirs": "tutorials/_rendered_examples/",
+}
+
 # Setup the breathe extension
 breathe_projects = {"Torch-TensorRT": "./_tmp/xml"}
 breathe_default_project = "Torch-TensorRT"

docsrc/index.rst

@@ -36,30 +36,41 @@ Getting Started
    getting_started/getting_started_with_windows
 
 
-Tutorials
+User Guide
 ------------
 * :ref:`creating_a_ts_mod`
 * :ref:`getting_started_with_fx`
 * :ref:`ptq`
 * :ref:`runtime`
-* :ref:`serving_torch_tensorrt_with_triton`
 * :ref:`use_from_pytorch`
 * :ref:`using_dla`
+
+.. toctree::
+   :caption: User Guide
+   :maxdepth: 1
+   :hidden:
+
+   user_guide/creating_torchscript_module_in_python
+   user_guide/getting_started_with_fx_path
+   user_guide/ptq
+   user_guide/runtime
+   user_guide/use_from_pytorch
+   user_guide/using_dla
+
+Tutorials
+------------
+* :ref:`serving_torch_tensorrt_with_triton`
 * :ref:`notebooks`
+* :ref:`dynamo_compile`
 
 .. toctree::
    :caption: Tutorials
-   :maxdepth: 1
+   :maxdepth: 3
    :hidden:
 
-   tutorials/creating_torchscript_module_in_python
-   tutorials/getting_started_with_fx_path
-   tutorials/ptq
-   tutorials/runtime
    tutorials/serving_torch_tensorrt_with_triton
-   tutorials/use_from_pytorch
-   tutorials/using_dla
    tutorials/notebooks
+   tutorials/_rendered_examples/index
 
 Python API Documenation
 ------------------------

docsrc/requirements.txt

@@ -1,4 +1,5 @@
 sphinx==4.5.0
+sphinx-gallery==0.13.0
 breathe==4.33.1
 exhale==0.3.1
 -e git+https://github.com/pytorch/pytorch_sphinx_theme.git#egg=pytorch_sphinx_theme

examples/dynamo/README.rst

@@ -0,0 +1,12 @@
+.. _dynamo_compile:
+
+Dynamo Compile Examples
+================
+
+This document contains examples of usage of the `torch_tensorrt.dynamo.compile` API which integrates with `torch.compile` functionality
+
+Overview of Available Scripts
+-----------------------------------------------
+- `dynamo_compile_resnet_example.py <./dynamo_compile_resnet_example.html>`_: Example showcasing compilation of ResNet model
+- `dynamo_compile_transformers_example.py <./dynamo_compile_transformers_example.html>`_: Example showcasing compilation of transformer-based model
+- `dynamo_compile_advanced_usage.py <./dynamo_compile_advanced_usage.html>`_: Advanced usage including making a custom backend to use directly with the `torch.compile` API

examples/dynamo/dynamo_compile_advanced_usage.py

@@ -0,0 +1,83 @@
+"""
+Dynamo Compile Advanced Usage
+=========================
+
+This interactive script is intended as an overview of the process by which `torch_tensorrt.dynamo.compile` works, and how it integrates with the new `torch.compile` API."""
+
+# %%
+# Imports and Model Definition
+# ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+import torch
+from torch_tensorrt.dynamo.backend import create_backend
+from torch_tensorrt.fx.lower_setting import LowerPrecision
+
+# %%
+
+# We begin by defining a model
+class Model(torch.nn.Module):
+    def __init__(self) -> None:
+        super().__init__()
+        self.relu = torch.nn.ReLU()
+
+    def forward(self, x: torch.Tensor, y: torch.Tensor):
+        x_out = self.relu(x)
+        y_out = self.relu(y)
+        x_y_out = x_out + y_out
+        return torch.mean(x_y_out)
+
+
+# %%
+# Compilation with `torch.compile` Using Default Settings
+# ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+# Define sample float inputs and initialize model
+sample_inputs = [torch.rand((5, 7)).cuda(), torch.rand((5, 7)).cuda()]
+model = Model().eval().cuda()
+
+# %%
+
+# Next, we compile the model using torch.compile
+# For the default settings, we can simply call torch.compile
+# with the backend "tensorrt", and run the model on an
+# input to cause compilation, as so:
+optimized_model = torch.compile(model, backend="tensorrt")
+optimized_model(*sample_inputs)
+
+# %%
+# Compilation with `torch.compile` Using Custom Settings
+# ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+# Define sample half inputs and initialize model
+sample_inputs_half = [
+    torch.rand((5, 7)).half().cuda(),
+    torch.rand((5, 7)).half().cuda(),
+]
+model_half = Model().eval().cuda()
+
+# %%
+
+# If we want to customize certain options in the backend,
+# but still use the torch.compile call directly, we can call the
+# convenience/helper function create_backend to create a custom backend
+# which has been pre-populated with certain keys
+custom_backend = create_backend(
+    lower_precision=LowerPrecision.FP16,
+    debug=True,
+    min_block_size=2,
+    torch_executed_ops={},
+)
+
+# Run the model on an input to cause compilation, as so:
+optimized_model_custom = torch.compile(model_half, backend=custom_backend)
+optimized_model_custom(*sample_inputs_half)
+
+# %%
+# Cleanup
+# ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+# Finally, we use Torch utilities to clean up the workspace
+torch._dynamo.reset()
+
+with torch.no_grad():
+    torch.cuda.empty_cache()

examples/dynamo/dynamo_compile_resnet_example.py

@@ -0,0 +1,82 @@
+"""
+Dynamo Compile ResNet Example
+=========================
+
+This interactive script is intended as a sample of the `torch_tensorrt.dynamo.compile` workflow on a ResNet model."""
+
+# %%
+# Imports and Model Definition
+# ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+import torch
+import torch_tensorrt
+import torchvision.models as models
+
+# %%
+
+# Initialize model with half precision and sample inputs
+model = models.resnet18(pretrained=True).half().eval().to("cuda")
+inputs = [torch.randn((1, 3, 224, 224)).to("cuda").half()]
+
+# %%
+# Optional Input Arguments to `torch_tensorrt.dynamo.compile`
+# ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+# Enabled precision for TensorRT optimization
+enabled_precisions = {torch.half}
+
+# Whether to print verbose logs
+debug = True
+
+# Workspace size for TensorRT
+workspace_size = 20 << 30
+
+# Maximum number of TRT Engines
+# (Lower value allows more graph segmentation)
+min_block_size = 3
+
+# Operations to Run in Torch, regardless of converter support
+torch_executed_ops = {}
+
+# %%
+# Compilation with `torch_tensorrt.dynamo.compile`
+# ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+# Build and compile the model with torch.compile, using Torch-TensorRT backend
+optimized_model = torch_tensorrt.dynamo.compile(
+    model,
+    inputs,
+    enabled_precisions=enabled_precisions,
+    debug=debug,
+    workspace_size=workspace_size,
+    min_block_size=min_block_size,
+    torch_executed_ops=torch_executed_ops,
+)
+
+# %%
+# Equivalently, we could have run the above via the convenience frontend, as so:
+# `torch_tensorrt.compile(model, ir="dynamo_compile", inputs=inputs, ...)`
+
+# %%
+# Inference
+# ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+# Does not cause recompilation (same batch size as input)
+new_inputs = [torch.randn((1, 3, 224, 224)).half().to("cuda")]
+new_outputs = optimized_model(*new_inputs)
+
+# %%
+
+# Does cause recompilation (new batch size)
+new_batch_size_inputs = [torch.randn((8, 3, 224, 224)).half().to("cuda")]
+new_batch_size_outputs = optimized_model(*new_batch_size_inputs)
+
+# %%
+# Cleanup
+# ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+# Finally, we use Torch utilities to clean up the workspace
+torch._dynamo.reset()
+
+with torch.no_grad():
+    torch.cuda.empty_cache()

examples/dynamo/dynamo_compile_transformers_example.py

@@ -0,0 +1,92 @@
+"""
+Dynamo Compile Transformers Example
+=========================
+
+This interactive script is intended as a sample of the `torch_tensorrt.dynamo.compile` workflow on a transformer-based model."""
+
+# %%
+# Imports and Model Definition
+# ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+import torch
+import torch_tensorrt
+from transformers import BertModel
+
+# %%
+
+# Initialize model with float precision and sample inputs
+model = BertModel.from_pretrained("bert-base-uncased").eval().to("cuda")
+inputs = [
+    torch.randint(0, 2, (1, 14), dtype=torch.int32).to("cuda"),
+    torch.randint(0, 2, (1, 14), dtype=torch.int32).to("cuda"),
+]
+
+
+# %%
+# Optional Input Arguments to `torch_tensorrt.dynamo.compile`
+# ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+# Enabled precision for TensorRT optimization
+enabled_precisions = {torch.float}
+
+# Whether to print verbose logs
+debug = True
+
+# Workspace size for TensorRT
+workspace_size = 20 << 30
+
+# Maximum number of TRT Engines
+# (Lower value allows more graph segmentation)
+min_block_size = 3
+
+# Operations to Run in Torch, regardless of converter support
+torch_executed_ops = {}
+
+# %%
+# Compilation with `torch_tensorrt.dynamo.compile`
+# ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+# Build and compile the model with torch.compile, using tensorrt backend
+optimized_model = torch_tensorrt.dynamo.compile(
+    model,
+    inputs,
+    enabled_precisions=enabled_precisions,
+    debug=debug,
+    workspace_size=workspace_size,
+    min_block_size=min_block_size,
+    torch_executed_ops=torch_executed_ops,
+)
+
+# %%
+# Equivalently, we could have run the above via the convenience frontend, as so:
+# `torch_tensorrt.compile(model, ir="dynamo_compile", inputs=inputs, ...)`
+
+# %%
+# Inference
+# ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+# Does not cause recompilation (same batch size as input)
+new_inputs = [
+    torch.randint(0, 2, (1, 14), dtype=torch.int32).to("cuda"),
+    torch.randint(0, 2, (1, 14), dtype=torch.int32).to("cuda"),
+]
+new_outputs = optimized_model(*new_inputs)
+
+# %%
+
+# Does cause recompilation (new batch size)
+new_inputs = [
+    torch.randint(0, 2, (4, 14), dtype=torch.int32).to("cuda"),
+    torch.randint(0, 2, (4, 14), dtype=torch.int32).to("cuda"),
+]
+new_outputs = optimized_model(*new_inputs)
+
+# %%
+# Cleanup
+# ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+# Finally, we use Torch utilities to clean up the workspace
+torch._dynamo.reset()
+
+with torch.no_grad():
+    torch.cuda.empty_cache()