[bugfix] fix mcore-bridge vpp

[Jintao-Huang]

No description provided.

[gemini-code-assist]

Summary of Changes

Hello @Jintao-Huang, 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 a bug within the mcore-bridge component, specifically in the _convert function responsible for model conversion. The core of the fix involves refactoring the layer iteration mechanism from a standard for loop to a while loop, coupled with manual management of the layer index and progress bar updates. This ensures that the conversion process accurately reflects progress and correctly handles scenarios where certain layers might be skipped, particularly in configurations involving Virtual Pipeline Parallelism.

Highlights

• Loop Refactoring: The layer iteration in the _convert method has been refactored from a for loop to a while loop to provide more granular control over the iteration process.
• Progress Bar Management: Manual incrementing of layer_idx and explicit tqdm progress bar updates have been introduced to ensure accurate tracking, especially in scenarios where layers might be skipped.
• VPP Compatibility: The changes improve compatibility with Virtual Pipeline Parallelism (VPP) by correctly handling layer indexing and progress updates in distributed environments, addressing potential issues with skipped layers.

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[gemini-code-assist]

Code Review

This pull request refactors a for loop into a while loop to correctly handle virtual pipeline parallelism (VPP) in the mcore-bridge. The change to a while loop is necessary for the complex control flow required by VPP, especially for retrying a layer index with a new model chunk. The implementation is functionally correct. I've added a suggestion to refactor the loop body to improve readability and remove minor code duplication.