Add NUMA balancing detection and performance warning

[Functionhx]

[ds-review-bot]

🤖 ds-review-bot Code Review

v4

⚠️ 未完成评审（no_result_file：模型未产出结果文件）

v3

This is a well-scoped, low-risk PR that adds NUMA balancing detection with a non-fatal performance warning at import time in deep_ep/init.py. The implementation is correct and idiomatic. Strengths: (1) It mirrors the existing EP_SUPPRESS_NCCL_CHECK pattern including the int(os.environ.get(..., 0)) idiom. (2) It correctly uses warnings.warn() rather than assert, matching the intent that NUMA balancing is a performance concern (non-fatal), unlike check_nccl_so() which correctly aborts; good use of stacklevel=2 and an actionable remediation command in the message. (3) except OSError is the right choice: it covers both FileNotFoundError (non-Linux / no procfs) and PermissionError (containers where the file exists but is unreadable), since both subclass OSError, and the != '0' comparison correctly treats tiered modes (1, 2) as enabled. (4) Placement before check_nccl_so() and init_jit() ensures the warning surfaces early at import time. The main gap is documentation: the new EP_SUPPRESS_NUMA_CHECK environment variable is not added to the README, unlike the existing EP_SUPPRESS_NCCL_CHECK which is documented. Recommend adding that one line before merge; otherwise approve.

Files reviewed: 1
Issues found: 🔵 1 suggestion
Inline comments posted: 0
General comments (无法定位到 diff): 1

⚠️ Parse warning: [v4] no_result_file：模型未产出结果文件

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📍 未定位到 diff 的评论

🔵 suggestion README.md:L337: The new EP_SUPPRESS_NUMA_CHECK env var is not documented. The sibling EP_SUPPRESS_NCCL_CHECK is documented here under 'Environment variables > General'. For consistency, add a line such as: '- EP_SUPPRESS_NUMA_CHECK: 0 or 1, suppress NUMA balancing detection warning, 0 by default'. This PR only touched deep_ep/init.py. _{🤖 v3}