Added flux demo

examples/apps/flux-demo.py

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+import time
+
+import gradio as gr
+import torch
+import torch_tensorrt
+from diffusers import FluxPipeline
+
+DEVICE = "cuda:0"
+pipe = FluxPipeline.from_pretrained(
+    "black-forest-labs/FLUX.1-dev",
+    torch_dtype=torch.float16,
+)
+pipe.to(DEVICE).to(torch.float16)
+backbone = pipe.transformer
+
+
+batch_size = 2
+BATCH = torch.export.Dim("batch", min=1, max=8)
+
+# This particular min, max values for img_id input are recommended by torch dynamo during the export of the model.
+# To see this recommendation, you can try exporting using min=1, max=4096
+dynamic_shapes = {
+    "hidden_states": {0: BATCH},
+    "encoder_hidden_states": {0: BATCH},
+    "pooled_projections": {0: BATCH},
+    "timestep": {0: BATCH},
+    "txt_ids": {},
+    "img_ids": {},
+    "guidance": {0: BATCH},
+    "joint_attention_kwargs": {},
+    "return_dict": None,
+}
+
+settings = {
+    "strict": False,
+    "allow_complex_guards_as_runtime_asserts": True,
+    "enabled_precisions": {torch.float32},
+    "truncate_double": True,
+    "min_block_size": 1,
+    "use_fp32_acc": True,
+    "use_explicit_typing": True,
+    "debug": False,
+    "use_python_runtime": True,
+    "immutable_weights": False,
+    "enable_cuda_graph": True,
+}
+
+trt_gm = torch_tensorrt.MutableTorchTensorRTModule(backbone, **settings)
+trt_gm.set_expected_dynamic_shape_range((), dynamic_shapes)
+pipe.transformer = trt_gm
+
+
+def generate_image(prompt, inference_step, batch_size=2):
+    start_time = time.time()
+    image = pipe(
+        prompt,
+        output_type="pil",
+        num_inference_steps=inference_step,
+        num_images_per_prompt=batch_size,
+    ).images
+    end_time = time.time()
+    return image, end_time - start_time
+
+
+generate_image(["Test"], 2)
+torch.cuda.empty_cache()
+
+
+def model_change(model):
+    if model == "Torch Model":
+        pipe.transformer = backbone
+        backbone.to(DEVICE)
+    else:
+        backbone.to("cpu")
+        pipe.transformer = trt_gm
+        torch.cuda.empty_cache()
+
+
+def load_lora(path):
+
+    pipe.load_lora_weights(
+        path,
+        adapter_name="lora1",
+    )
+    pipe.set_adapters(["lora1"], adapter_weights=[1])
+    pipe.fuse_lora()
+    pipe.unload_lora_weights()
+    print("LoRA loaded! Begin refitting")
+    generate_image(["Test"], 2)
+    print("Refitting Finished!")
+
+
+# Create Gradio interface
+with gr.Blocks(title="Flux Demo with Torch-TensorRT") as demo:
+    gr.Markdown("# Flux Image Generation Demo Accelerated by Torch-TensorRT")
+
+    with gr.Row():
+        with gr.Column():
+            # Input components
+            prompt_input = gr.Textbox(
+                label="Prompt", placeholder="Enter your prompt here...", lines=3
+            )
+            model_dropdown = gr.Dropdown(
+                choices=["Torch Model", "Torch-TensorRT Accelerated Model"],
+                value="Torch-TensorRT Accelerated Model",
+                label="Model Variant",
+            )
+
+            lora_upload_path = gr.Textbox(
+                label="LoRA Path",
+                placeholder="Enter the LoRA checkpoint path here",
+                value="/home/TensorRT/examples/apps/NGRVNG.safetensors",
+                lines=2,
+            )
+            num_steps = gr.Slider(
+                minimum=20, maximum=100, value=20, step=1, label="Inference Steps"
+            )
+            batch_size = gr.Slider(
+                minimum=1, maximum=8, value=1, step=1, label="Batch Size"
+            )
+
+            generate_btn = gr.Button("Generate Image")
+            load_lora_btn = gr.Button("Load LoRA")
+
+        with gr.Column():
+            # Output component
+            output_image = gr.Gallery(label="Generated Image")
+            time_taken = gr.Textbox(
+                label="Generation Time (seconds)", interactive=False
+            )
+
+    # Connect the button to the generation function
+    model_dropdown.change(model_change, inputs=[model_dropdown])
+    load_lora_btn.click(
+        fn=load_lora,
+        inputs=[
+            lora_upload_path,
+        ],
+    )
+
+    # Update generate button click to include time output
+    generate_btn.click(
+        fn=generate_image,
+        inputs=[
+            prompt_input,
+            num_steps,
+            batch_size,
+        ],
+        outputs=[output_image, time_taken],
+    )
+
+# Launch the interface
+if __name__ == "__main__":
+    demo.launch()

examples/apps/flux-quantization-fp32.py

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+# %%
+# Import the following libraries
+# -----------------------------
+import re
+
+import modelopt.torch.opt as mto
+import modelopt.torch.quantization as mtq
+import torch
+import torch_tensorrt
+from diffusers import FluxPipeline
+from diffusers.models.attention_processor import Attention
+from diffusers.models.transformers.transformer_flux import FluxTransformer2DModel
+from modelopt.torch.quantization.utils import export_torch_mode
+from torch.export._trace import _export
+from transformers import AutoModelForCausalLM
+
+# %%
+DEVICE = "cuda:0"
+pipe = FluxPipeline.from_pretrained(
+    "black-forest-labs/FLUX.1-dev",
+    torch_dtype=torch.float32,
+)
+pipe.transformer = FluxTransformer2DModel(
+    num_layers=1, num_single_layers=1, guidance_embeds=True
+)
+
+pipe.to(DEVICE).to(torch.float32)
+# Store the config and transformer backbone
+config = pipe.transformer.config
+# global backbone
+backbone = pipe.transformer
+backbone.eval()
+
+
+def filter_func(name):
+    pattern = re.compile(
+        r".*(time_emb_proj|time_embedding|conv_in|conv_out|conv_shortcut|add_embedding|pos_embed|time_text_embed|context_embedder|norm_out|x_embedder).*"
+    )
+    return pattern.match(name) is not None
+
+
+def generate_image(pipe, prompt, image_name):
+    seed = 42
+    image = pipe(
+        prompt,
+        output_type="pil",
+        num_inference_steps=20,
+        generator=torch.Generator("cuda").manual_seed(seed),
+    ).images[0]
+    image.save(f"{image_name}.png")
+    print(f"Image generated using {image_name} model saved as {image_name}.png")
+
+
+generate_image(pipe, ["A golden retriever holding a sign to code"], "dog_code")
+
+# %%
+# Quantization
+
+
+def do_calibrate(
+    pipe,
+    prompt: str,
+) -> None:
+    """
+    Run calibration steps on the pipeline using the given prompts.
+    """
+    image = pipe(
+        prompt,
+        output_type="pil",
+        num_inference_steps=20,
+        generator=torch.Generator("cuda").manual_seed(0),
+    ).images[0]
+
+
+def forward_loop(mod):
+    # Switch the pipeline's backbone, run calibration
+    pipe.transformer = mod
+    do_calibrate(
+        pipe=pipe,
+        prompt="test",
+    )
+
+
+ptq_config = mtq.FP8_DEFAULT_CFG
+backbone = mtq.quantize(backbone, ptq_config, forward_loop)
+mtq.disable_quantizer(backbone, filter_func)
+
+
+# %%
+# Export the backbone using torch.export
+# --------------------------------------------------
+# Define the dummy inputs and their respective dynamic shapes. We export the transformer backbone with dynamic shapes with a ``batch_size=2``
+# due to `0/1 specialization <https://docs.google.com/document/d/16VPOa3d-Liikf48teAOmxLc92rgvJdfosIy-yoT38Io/edit?fbclid=IwAR3HNwmmexcitV0pbZm_x1a4ykdXZ9th_eJWK-3hBtVgKnrkmemz6Pm5jRQ&tab=t.0#heading=h.ez923tomjvyk>`_
+
+batch_size = 2
+BATCH = torch.export.Dim("batch", min=1, max=2)
+SEQ_LEN = torch.export.Dim("seq_len", min=1, max=512)
+# This particular min, max values for img_id input are recommended by torch dynamo during the export of the model.
+# To see this recommendation, you can try exporting using min=1, max=4096
+IMG_ID = torch.export.Dim("img_id", min=3586, max=4096)
+dynamic_shapes = {
+    "hidden_states": {0: BATCH},
+    "encoder_hidden_states": {0: BATCH, 1: SEQ_LEN},
+    "pooled_projections": {0: BATCH},
+    "timestep": {0: BATCH},
+    "txt_ids": {0: SEQ_LEN},
+    "img_ids": {0: IMG_ID},
+    "guidance": {0: BATCH},
+    "joint_attention_kwargs": {},
+    "return_dict": None,
+}
+# The guidance factor is of type torch.float32
+dummy_inputs = {
+    "hidden_states": torch.randn((batch_size, 4096, 64), dtype=torch.float32).to(
+        DEVICE
+    ),
+    "encoder_hidden_states": torch.randn(
+        (batch_size, 512, 4096), dtype=torch.float32
+    ).to(DEVICE),
+    "pooled_projections": torch.randn((batch_size, 768), dtype=torch.float32).to(
+        DEVICE
+    ),
+    "timestep": torch.tensor([1.0, 1.0], dtype=torch.float32).to(DEVICE),
+    "txt_ids": torch.randn((512, 3), dtype=torch.float32).to(DEVICE),
+    "img_ids": torch.randn((4096, 3), dtype=torch.float32).to(DEVICE),
+    "guidance": torch.tensor([1.0, 1.0], dtype=torch.float32).to(DEVICE),
+    "joint_attention_kwargs": {},
+    "return_dict": False,
+}
+
+# This will create an exported program which is going to be compiled with Torch-TensorRT
+with export_torch_mode():
+    ep = _export(
+        backbone,
+        args=(),
+        kwargs=dummy_inputs,
+        dynamic_shapes=dynamic_shapes,
+        strict=False,
+        allow_complex_guards_as_runtime_asserts=True,
+    )
+
+with torch_tensorrt.logging.debug():
+    trt_gm = torch_tensorrt.dynamo.compile(
+        ep,
+        inputs=dummy_inputs,
+        enabled_precisions={torch.float8_e4m3fn},
+        truncate_double=True,
+        min_block_size=1,
+        debug=False,
+        use_python_runtime=True,
+        immutable_weights=True,
+        offload_module_to_cpu=True,
+    )
+
+
+del ep
+pipe.transformer = trt_gm
+pipe.transformer.config = config
+
+
+# %%
+trt_gm.device = torch.device(DEVICE)
+# Function which generates images from the flux pipeline
+
+for _ in range(2):
+    generate_image(pipe, ["A golden retriever holding a sign to code"], "dog_code")
+
+# For this dummy model, the fp16 engine size is around 1GB, fp32 engine size is around 2GB