fix cuda init error for cpu-only (config_server mode) device

[shihaobai]

No description provided.

[gemini-code-assist]

Summary of Changes

Hello @shihaobai, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request addresses an issue where the code attempted to initialize CUDA even when running on a system without a CUDA-capable GPU. By adding a check for CUDA availability before initialization, the change ensures compatibility and prevents errors in CPU-only environments.

Highlights

• CUDA Initialization Fix: Added a check to ensure torch.cuda.init() is only called if a CUDA-enabled device is available, preventing potential errors on CPU-only systems.

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[gemini-code-assist]

Code Review

The pull request updates the CUDA initialization logic by adding a torch.cuda.is_available() check. This prevents errors when running on CPU-only devices by ensuring torch.cuda.init() is only called if CUDA is available.