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vllm-omni/tests/e2e/online_serving/test_flux2_expansion.py
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"""
Tests for Flux2 Klein; currently Dev is implemented separately,
but ideally these models will fold together in the future.
Coverage:
- FP8 + CacheDiT + Ulysses=2 + TP=2
- Layerwise CPU offload + Ulysses=2 + Ring=2
- Layerwise CPU offload + TP=2
- Layerwise CPU offload + HSDP
"""
import pytest
from tests.helpers.mark import hardware_marks
from tests.helpers.runtime import (
OmniServer,
OmniServerParams,
OpenAIClientHandler,
dummy_messages_from_mix_data,
)
pytestmark = [pytest.mark.diffusion, pytest.mark.full_model]
FOUR_CARD_FEATURE_MARKS = hardware_marks(res={"cuda": "L4"}, num_cards=4)
POSITIVE_PROMPT = "A cat sitting on a windowsill"
NEGATIVE_PROMPT = "blurry, low quality"
# For now, we only test a good configuration for this model to keep the CI
# light, but in the near future may explore using random models to check
# cross-feature compatibility more generally.
def _get_diffusion_feature_cases(model: str):
return [
# FP8 / Hybrid sequence parallelism
pytest.param(
OmniServerParams(
model=model,
server_args=[
"--cache-backend",
"cache_dit",
"--ulysses-degree",
"2",
"--quantization",
"fp8",
# NOTE: TP added for test coverage here since it doesn't
# slow things down too much, but fp8 + ulysses SP +
# cache_dit will generally get you the highest speedup here
"--tensor-parallel-size",
"2",
],
),
marks=FOUR_CARD_FEATURE_MARKS,
),
pytest.param(
OmniServerParams(
model=model,
server_args=[
"--enable-layerwise-offload",
"--ulysses-degree",
"2",
"--ring",
"2",
],
),
id="layerwise_ulysses2_ring2",
marks=FOUR_CARD_FEATURE_MARKS,
),
pytest.param(
OmniServerParams(
model=model,
server_args=[
"--enable-layerwise-offload",
"--tensor-parallel-size",
"2",
],
),
id="layerwise_tp2",
marks=FOUR_CARD_FEATURE_MARKS,
),
pytest.param(
OmniServerParams(
model=model,
server_args=[
"--enable-layerwise-offload",
"--use-hsdp",
"--hsdp-shard-size",
"2",
],
),
id="layerwise_hsdp",
marks=FOUR_CARD_FEATURE_MARKS,
),
]
@pytest.mark.parametrize(
"omni_server",
_get_diffusion_feature_cases(
model="black-forest-labs/FLUX.2-klein-4B",
),
indirect=True,
)
def test_flux2_klein(omni_server: OmniServer, openai_client: OpenAIClientHandler):
messages = dummy_messages_from_mix_data(content_text=POSITIVE_PROMPT)
request_config = {
"model": omni_server.model,
"messages": messages,
"extra_body": {
"height": 512,
"width": 512,
"num_inference_steps": 2,
"negative_prompt": NEGATIVE_PROMPT,
"true_cfg_scale": 4.0,
"seed": 42,
},
}
openai_client.send_diffusion_request(request_config)