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[Build] Make pypi install work on CPU platform #12874

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Merged
simon-mo merged 1 commit into from
Feb 8, 2025
Merged

[Build] Make pypi install work on CPU platform #12874

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9 changes: 7 additions & 2 deletions setup.py
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Original file line number Diff line number Diff line change
Expand Up @@ -47,6 +47,11 @@ def load_module_from_path(module_name, path):
"Building on %s, "
"so vLLM may not be able to run correctly", sys.platform)
VLLM_TARGET_DEVICE = "empty"
elif (sys.platform.startswith("linux") and torch.version.cuda is None
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@gshtras gshtras Feb 10, 2025

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Need to check for torch.version.hip alongside torch.version.cuda, otherwise on ROCm it'll fall back to CPU

and os.getenv("VLLM_TARGET_DEVICE") is None):
# if cuda is not available and VLLM_TARGET_DEVICE is not set,
# fallback to cpu
VLLM_TARGET_DEVICE = "cpu"

MAIN_CUDA_VERSION = "12.1"

Expand Down Expand Up @@ -482,7 +487,6 @@ def get_vllm_version() -> str:
version = get_version(
write_to="vllm/_version.py", # TODO: move this to pyproject.toml
)

sep = "+" if "+" not in version else "." # dev versions might contain +

if _no_device():
Expand Down Expand Up @@ -520,7 +524,8 @@ def get_vllm_version() -> str:
elif _is_tpu():
version += f"{sep}tpu"
elif _is_cpu():
version += f"{sep}cpu"
if envs.VLLM_TARGET_DEVICE == "cpu":
version += f"{sep}cpu"
Comment on lines 523 to 528
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@mgoin mgoin Feb 7, 2025

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Why do we need this guard now for cpu?

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@wangxiyuan wangxiyuan Feb 7, 2025 •
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This is a little tricky here. Like L491 does,

if _no_device():
    if envs.VLLM_TARGET_DEVICE == "empty":
        version += f"{sep}empty"

it's used for check if the VLLM_TARGET_DEVICE is set by hand or not.
_is_cpu() means VLLM_TARGET_DEVICE is set to cpu by hand or by code logic. envs.VLLM_TARGET_DEVICE == "cpu" means it's set by hand.

When users build vllm by hand like VLLM_TARGET_DEVICE=cpu python setup.py install the version will will contains the suffix cpu which is the origin behavior.

When use pip install vllm, the version will not contain the suffix cpu. If it contains the suffix cpu , the error has inconsistent version: expected '0.7.2', but metadata has '0.7.2+cpu' will be raised by pip like the commit message say.

elif _is_xpu():
version += f"{sep}xpu"
else:
Expand Down