[Bugfix] Environment pre-check code adaptation

[Menglths]

Purpose

Implement the Environment PreCheck Suite to perform comprehensive health checks for Ascend NPU clusters before model training/deployment, ensuring device availability, network connectivity, and storage performance stability.

Modifications

1. Added run_hccn_device_status_check function: Implements HCCN device status detection (link neighbor, physical link, network health, IP configuration) and adds overall status aggregation logic.
2. Added remote_local_hccn_cards_ping_test function: Supports local/remote HCCN card ping tests for NPU network connectivity verification with unified result return.
3. Added complete storage bandwidth check module: Implements multi-process concurrent dump/load performance testing, calculates average bandwidth, and outputs standardized performance reports.

Test

All tests have passed.

[ygwpz]

Follow-up Review Summary

✅ Previous Issue Addressed

The encoding issue with the corrupted arrow character ("὆~R" instead of "→") has been fixed by replacing it with the word "to". Good fix!

🟠 New Issues Found

I found a few issues in the newly introduced bandwidth check implementation:

1. L3 - Global multiprocessing.Manager() at module level: The dump_bw_list and load_bw_list are created at module level, causing unnecessary server process spawn and state accumulation across multiple runs.

2. L4 - Resource leak: mmap objects in make_array() are not explicitly closed.

3. L4 - Exception swallowed: In remote_local_hccn_cards_ping_test, exception is caught but not logged.

4. Minor - Unused import: The threading module is imported but no longer used.

💡 Suggestions

• Consider making bandwidth test parameters configurable via config.yaml
• Add cleanup handling for mmap objects

See inline comments for specific code locations.

[ygwpz]

The environment pre-check documentation and script updates look reasonable.