[bugfix][CI] Diffusers backend update (#3096)
Signed-off-by: Huang, Zeyu <11222265+fhfuih@users.noreply.github.com> Signed-off-by: Zeyu Huang | 黃澤宇 <11222265+fhfuih@users.noreply.github.com> Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>
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Zeyu Huang | 黃澤宇andCopilot Autofix powered by AI authored and GitHub committed
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# SPDX-License-Identifier: Apache-2.0
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# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
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"""
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Run vLLM-Omni with diffusers backend, then run diffusers directly. Compare the output similarity.
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Also, do a quick performance check on the end-to-end latency.
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The latency check is not put under /tests/dfx/perf/ because this is not a complete performance check to be monitored.
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"""
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import base64
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import gc
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import io
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import time
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from pathlib import Path
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from types import SimpleNamespace
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from typing import Any
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import numpy as np
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import pytest
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import requests
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import torch
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from diffusers.pipelines.pipeline_utils import DiffusionPipeline
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from diffusers.utils import export_to_video # pyright: ignore[reportPrivateImportUsage]
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from PIL import Image
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from benchmarks.accuracy.common import pil_to_base64
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from tests.e2e.accuracy.helpers import (
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apply_ftfy_mock,
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assert_similarity,
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env_to_apply_ftfy_mock_in_subproc,
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model_output_dir,
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)
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from tests.e2e.accuracy.wan22_i2v.test_wan22_i2v_video_similarity import (
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_parse_psnr_score,
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_parse_ssim_score,
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_run_ffmpeg_similarity,
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)
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from tests.helpers.env import run_post_test_cleanup, run_pre_test_cleanup
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from tests.helpers.mark import hardware_test
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from tests.helpers.runtime import OmniServer, OpenAIClientHandler
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pytestmark = [pytest.mark.full_model, pytest.mark.diffusion]
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PROMPT = "A photo of a cat sitting on a laptop keyboard, digital art style."
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NEGATIVE_PROMPT = "blurry, low quality"
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WIDTH = 512
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HEIGHT = 512
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NUM_INFERENCE_STEPS = 20
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TRUE_CFG_SCALE = 4.0
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SEED = 42
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SSIM_THRESHOLD = 0.97
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PSNR_THRESHOLD = 30.0
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VIDEO_PROMPT = "The bear in the image dances happily"
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VIDEO_WIDTH = 832
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VIDEO_HEIGHT = 480
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VIDEO_NUM_INFERENCE_STEPS = 10
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NUM_FRAMES = 9
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FPS = 4
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GUIDANCE_SCALE = 4.0
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GUIDANCE_SCALE_2 = 1.0
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BOUNDARY_RATIO = 0.875
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FLOW_SHIFT = 12.0
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VIDEO_SSIM_THRESHOLD = 0.95
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VIDEO_PSNR_THRESHOLD = 30.0
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def _run_vllm_omni_wan22_i2v(
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*,
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model: str,
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output_path: Path,
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conditioning_image: Image.Image,
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) -> float:
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server_args = [
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"--num-gpus",
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"1",
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"--stage-init-timeout",
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"400",
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"--init-timeout",
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"900",
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"--diffusion-load-format",
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"diffusers",
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"--boundary-ratio",
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str(BOUNDARY_RATIO),
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"--flow-shift",
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str(FLOW_SHIFT),
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]
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form_data = {
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"prompt": VIDEO_PROMPT,
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"negative_prompt": NEGATIVE_PROMPT,
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"height": VIDEO_HEIGHT,
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"width": VIDEO_WIDTH,
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"num_inference_steps": VIDEO_NUM_INFERENCE_STEPS,
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"num_frames": NUM_FRAMES,
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"fps": FPS,
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"guidance_scale": GUIDANCE_SCALE,
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"guidance_scale_2": GUIDANCE_SCALE_2,
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"seed": SEED,
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}
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with OmniServer(model, server_args, env_dict=env_to_apply_ftfy_mock_in_subproc(), use_omni=True) as omni_server:
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client = OpenAIClientHandler(
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host=omni_server.host,
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port=omni_server.port,
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run_level="full_model",
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)
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request_config = {
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"model": omni_server.model,
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"form_data": form_data,
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"image_reference": f"data:image/png;base64,{pil_to_base64(conditioning_image, 'png')}",
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}
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result = client.send_video_diffusion_request(request_config)[0]
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video_bytes = result.videos[0] # pyright: ignore[reportOptionalSubscript] # Guaranteed not None
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output_path.write_bytes(video_bytes)
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return result.e2e_latency # pyright: ignore[reportReturnType] # Guaranteed not None
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def _run_diffusers_wan22_i2v(*, model: str, output_path: Path, conditioning_image: Image.Image) -> float:
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from diffusers import WanImageToVideoPipeline # pyright: ignore[reportPrivateImportUsage]
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from diffusers.schedulers.scheduling_unipc_multistep import UniPCMultistepScheduler
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run_pre_test_cleanup(enable_force=True)
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apply_ftfy_mock()
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pipe: WanImageToVideoPipeline | None = None
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try:
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pipe = WanImageToVideoPipeline.from_pretrained(
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model,
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torch_dtype=torch.bfloat16,
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trust_remote_code=True,
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boundary_ratio=BOUNDARY_RATIO,
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)
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pipe.scheduler = UniPCMultistepScheduler.from_config(pipe.scheduler.config, flow_shift=FLOW_SHIFT)
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pipe.to("cuda")
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_diffusers_dummy_run(pipe)
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generator = torch.Generator(device="cuda").manual_seed(SEED)
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with torch.inference_mode():
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start_time = time.perf_counter()
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result = pipe(
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image=conditioning_image,
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prompt=VIDEO_PROMPT,
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negative_prompt=NEGATIVE_PROMPT,
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height=VIDEO_HEIGHT,
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width=VIDEO_WIDTH,
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num_inference_steps=VIDEO_NUM_INFERENCE_STEPS,
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num_frames=NUM_FRAMES,
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guidance_scale=GUIDANCE_SCALE,
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guidance_scale_2=GUIDANCE_SCALE_2,
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generator=generator,
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)
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end_time = time.perf_counter()
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e2e_latency = end_time - start_time
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frames = result.frames[0] # pyright: ignore[reportAttributeAccessIssue]
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export_to_video(frames, str(output_path), fps=FPS) # pyright: ignore[reportArgumentType]
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return e2e_latency
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finally:
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if pipe is not None and hasattr(pipe, "maybe_free_model_hooks"):
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pipe.maybe_free_model_hooks()
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del pipe
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gc.collect()
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if torch.cuda.is_available():
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torch.cuda.empty_cache()
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run_post_test_cleanup(enable_force=True)
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def _run_vllm_omni_qwen_image(*, model: str, output_path: Path) -> tuple[Image.Image, float]:
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server_args = [
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"--num-gpus",
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"1",
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"--stage-init-timeout",
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"400",
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"--init-timeout",
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"900",
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"--diffusion-load-format",
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"diffusers",
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# "--enable-diffusion-pipeline-profiler",
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]
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with OmniServer(model, server_args, use_omni=True) as omni_server:
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start_time = time.perf_counter()
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response = requests.post(
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f"http://{omni_server.host}:{omni_server.port}/v1/images/generations",
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json={
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"model": omni_server.model,
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"prompt": PROMPT,
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"size": f"{WIDTH}x{HEIGHT}",
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"n": 1,
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"response_format": "b64_json",
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"negative_prompt": NEGATIVE_PROMPT,
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"num_inference_steps": NUM_INFERENCE_STEPS,
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"true_cfg_scale": TRUE_CFG_SCALE,
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"seed": SEED,
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},
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timeout=600,
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)
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end_time = time.perf_counter()
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e2e_latency = end_time - start_time
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response.raise_for_status()
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payload = response.json()
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assert len(payload["data"]) == 1
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image_bytes = base64.b64decode(payload["data"][0]["b64_json"])
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image = Image.open(io.BytesIO(image_bytes)).convert("RGB")
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image.load()
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image.save(output_path)
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return image, e2e_latency
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def _run_diffusers_qwen_image(*, model: str, output_path: Path) -> tuple[Image.Image, float]:
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run_pre_test_cleanup(enable_force=True)
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pipe: DiffusionPipeline | None = None
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try:
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pipe = DiffusionPipeline.from_pretrained(
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model,
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torch_dtype=torch.bfloat16,
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trust_remote_code=True,
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).to("cuda")
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_diffusers_dummy_run(pipe)
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generator = torch.Generator(device="cuda").manual_seed(SEED)
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with torch.inference_mode():
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start_time = time.perf_counter()
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result = pipe( # pyright: ignore[reportCallIssue]
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prompt=PROMPT,
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negative_prompt=NEGATIVE_PROMPT,
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width=WIDTH,
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height=HEIGHT,
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num_inference_steps=NUM_INFERENCE_STEPS,
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true_cfg_scale=TRUE_CFG_SCALE,
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generator=generator,
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)
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end_time = time.perf_counter()
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e2e_latency = end_time - start_time
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output_image = result.images[0].convert("RGB")
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output_image.save(output_path)
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return output_image, e2e_latency
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finally:
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if pipe is not None and hasattr(pipe, "maybe_free_model_hooks"):
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pipe.maybe_free_model_hooks()
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del pipe
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gc.collect()
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if torch.cuda.is_available():
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torch.cuda.empty_cache()
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run_post_test_cleanup(enable_force=True)
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@pytest.mark.benchmark
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@hardware_test(res={"cuda": "H100"}, num_cards=1)
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@pytest.mark.parametrize("model_id", ["Qwen/Qwen-Image"])
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def test_diffusers_backend_t2i_matches_diffusers(model_id: str, accuracy_artifact_root: Path) -> None:
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output_dir = model_output_dir(accuracy_artifact_root, model_id + "-diffusers-backend")
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vllm_output, vllm_latency = _run_vllm_omni_qwen_image(model=model_id, output_path=output_dir / "vllm_omni.png")
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diffusers_output, diffusers_latency = _run_diffusers_qwen_image(
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model=model_id, output_path=output_dir / "diffusers.png"
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)
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vllm_latency = vllm_latency * 1000
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diffusers_latency = diffusers_latency * 1000
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latency_threshold_factor = 0.2
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latency_threshold = diffusers_latency * (1 + latency_threshold_factor)
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print(f"{model_id} latency metrics:")
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print(
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f" Latency={vllm_latency:.2f}ms, threshold<={latency_threshold:.2f}ms, diffusers latency={diffusers_latency:.2f}ms, lower is better"
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)
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assert_similarity(
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model_name=model_id,
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vllm_image=vllm_output,
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diffusers_image=diffusers_output,
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width=WIDTH,
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height=HEIGHT,
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ssim_threshold=SSIM_THRESHOLD,
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psnr_threshold=PSNR_THRESHOLD,
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)
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assert vllm_latency <= latency_threshold, (
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f"VLLM latency ({vllm_latency:.2f}ms) is greater than {latency_threshold_factor * 100}% more than Diffusers latency ({diffusers_latency:.2f}ms)."
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)
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@pytest.mark.benchmark
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@hardware_test(res={"cuda": "H100"}, num_cards=1)
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@pytest.mark.parametrize("model_id", ["Wan-AI/Wan2.2-I2V-A14B-Diffusers"])
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def test_diffusers_backend_i2v_matches_diffusers(
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model_id: str,
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accuracy_artifact_root: Path,
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qwen_bear_image: Image.Image,
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) -> None:
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output_dir = model_output_dir(accuracy_artifact_root, model_id + "-diffusers-backend")
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resized_image = qwen_bear_image.resize((VIDEO_WIDTH, VIDEO_HEIGHT), Image.Resampling.LANCZOS)
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vllm_path = output_dir / "vllm_omni.mp4"
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vllm_latency = _run_vllm_omni_wan22_i2v(model=model_id, output_path=vllm_path, conditioning_image=resized_image)
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vllm_latency = vllm_latency * 1000
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diffusers_path = output_dir / "diffusers.mp4"
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diffusers_latency = _run_diffusers_wan22_i2v(
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model=model_id, output_path=diffusers_path, conditioning_image=resized_image
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)
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diffusers_latency = diffusers_latency * 1000
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latency_threshold_factor = 0.3
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latency_threshold = diffusers_latency * (1 + latency_threshold_factor)
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ssim_output = _run_ffmpeg_similarity("ssim", vllm_path, diffusers_path)
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psnr_output = _run_ffmpeg_similarity("psnr", vllm_path, diffusers_path)
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ssim_score = _parse_ssim_score(ssim_output)
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psnr_score = _parse_psnr_score(psnr_output)
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print(f"{model_id} latency metrics:")
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print(
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f" Latency={vllm_latency:.2f}ms, threshold<={latency_threshold:.2f}ms, diffusers latency={diffusers_latency:.2f}ms, lower is better"
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)
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print(f"{model_id} similarity metrics:")
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print(f" SSIM: value={ssim_score:.6f}, threshold>={VIDEO_SSIM_THRESHOLD:.6f}, range=[-1, 1], higher is better")
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print(
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f" PSNR: value={psnr_score:.6f} dB, threshold>={VIDEO_PSNR_THRESHOLD:.6f} dB, range=[0, +inf), higher is better"
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)
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assert ssim_score >= VIDEO_SSIM_THRESHOLD, (
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f"SSIM below threshold for {model_id}: got {ssim_score:.6f}, expected >= {VIDEO_SSIM_THRESHOLD:.6f}."
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)
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assert psnr_score >= VIDEO_PSNR_THRESHOLD, (
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f"PSNR below threshold for {model_id}: got {psnr_score:.6f}, expected >= {VIDEO_PSNR_THRESHOLD:.6f}."
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)
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assert vllm_latency <= latency_threshold, (
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f"VLLM latency ({vllm_latency:.2f}ms) is greater than {latency_threshold_factor * 100}% more than Diffusers latency ({diffusers_latency:.2f}ms)."
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)
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def _diffusers_dummy_run(pipe: DiffusionPipeline) -> None:
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from vllm_omni.diffusion.diffusion_engine import supports_multimodal_input
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supports_image_input, supports_audio_input = supports_multimodal_input(
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SimpleNamespace(
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diffusion_load_format="diffusers",
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diffusers_pipeline_cls=pipe.__class__,
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model_class_name="DiffusersAdapterPipeline",
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), # pyright: ignore[reportArgumentType]
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)
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height = 512
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width = 512
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kwargs: dict[str, Any] = {
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"prompt": "dummy run",
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"height": height,
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"width": width,
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"num_inference_steps": 1,
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}
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if supports_image_input:
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# Provide a dummy image input if the model supports it
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dummy_image = Image.new("RGB", (width, height))
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kwargs["image"] = dummy_image
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if supports_audio_input:
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audio_sr = 16000
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dummy_audio = np.random.randn(audio_sr * 2).astype(np.float32)
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kwargs["audio"] = dummy_audio
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with torch.inference_mode():
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pipe(**kwargs) # pyright: ignore[reportCallIssue]
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