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[BugFix][MyPy]: Module has no attribute "sched_getaffinity" [attr-defined] #41465

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Merged
hmellor merged 2 commits into from
May 5, 2026
+8 −11
Merged

[BugFix][MyPy]: Module has no attribute "sched_getaffinity" [attr-defined] #41465

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f4b0b0d
Fix mypy error
hickeyma May 1, 2026
6f2f7f3
Replace platform.system() for consistency
hickeyma May 1, 2026
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19 changes: 8 additions & 11 deletions vllm/utils/cpu_resource_utils.py
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Original file line number Diff line number Diff line change
Expand Up @@ -3,8 +3,8 @@

import json
import os
import platform
import subprocess
import sys
from dataclasses import dataclass
from functools import cache

Expand Down Expand Up @@ -78,7 +78,7 @@ def parse_id_list(raw_str: str) -> list[int]:


def get_memory_node_info(node_id: int = 0) -> MemoryNodeInfo:
if platform.system() == "Darwin":
if sys.platform == "darwin":
# MacOS has no memory node
return MemoryNodeInfo(
total_memory=psutil.virtual_memory().total,
Expand Down Expand Up @@ -122,17 +122,14 @@ def get_memory_node_info(node_id: int = 0) -> MemoryNodeInfo:

def get_allowed_cpu_list() -> list[LogicalCPUInfo]:
cpu_list = _get_cpu_list()
if platform.system() == "Darwin":
return cpu_list

global_allowed_cpu_id_list = os.sched_getaffinity(0) # type: ignore[attr-defined]
logical_cpu_list = [x for x in cpu_list if x.id in global_allowed_cpu_id_list]

return logical_cpu_list
if sys.platform == "linux":
allowed = os.sched_getaffinity(0)
return [x for x in cpu_list if x.id in allowed]
return cpu_list


def get_visible_memory_node() -> list[int]:
if platform.system() == "Darwin":
if sys.platform == "darwin":
return [0]

allowed_memory_node_list = get_memory_affinity()
Expand Down Expand Up @@ -163,7 +160,7 @@ def _synthesize_cpu_list() -> list[LogicalCPUInfo]:


def _get_cpu_list() -> list[LogicalCPUInfo]:
if platform.system() == "Darwin":
if sys.platform == "darwin":
# For MacOS, no user-level CPU affinity and SMT, return all CPUs
return _synthesize_cpu_list()

Expand Down
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