refactor: use single queue for all workers in job controller

[sahitya-chandra]

What type of PR is this?

/kind feature
/kind cleanup

What this PR does / why we need it:

The job controller previously created multiple queues, one per worker, which introduced unnecessary complexity. Since workqueue is concurrent-safe for reading and writing, we can simplify the code by using a single shared queue for all workers.

Which issue(s) this PR fixes:

Fixes #4835

Special notes for your reviewer:

This is a refactoring change that maintains the same functionality. The workqueue is designed to be used concurrently by multiple goroutines, so this change is safe. All existing tests continue to pass.

Does this PR introduce a user-facing change?

NONE

[volcano-sh-bot]

Welcome @sahitya-chandra! It looks like this is your first PR to volcano-sh/volcano 🎉

[gemini-code-assist]

Summary of Changes

Hello @sahitya-chandra, 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 streamlines the job controller's internal architecture by consolidating its queueing mechanism. Previously, the controller managed a separate workqueue for each worker, adding unnecessary complexity. The update transitions to a single, shared, and concurrently safe queue, simplifying the design and improving code clarity without altering the controller's external behavior or performance.

Highlights

• Simplified Queue Management: The job controller has been refactored to use a single shared workqueue.TypedRateLimitingInterface for all workers, replacing the previous design that utilized multiple queues, one for each worker.
• Reduced Code Complexity: By leveraging the concurrent-safe nature of workqueue, several functions related to worker-specific queue management, such as belongsToThisRoutine and genHash, have been removed, leading to a cleaner and more maintainable codebase.
• Maintained Functionality: This change is purely a refactoring effort; the core functionality of the job controller remains unchanged, and all existing tests continue to pass, ensuring no regression.

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[gemini-code-assist]

Code Review

This pull request is a great refactoring that simplifies the job controller by replacing multiple worker-specific queues with a single shared workqueue. This change correctly leverages the concurrency-safe nature of workqueue to reduce complexity, remove hashing logic, and improve maintainability. The code is now easier to understand and should also improve worker utilization. The changes are well-contained and logical. I have one suggestion for further cleanup to improve the code clarity.

[hzxuzhonghu]

nit: we donot even need the temp var

[sahitya-chandra]

fixed this sir

[hzxuzhonghu]

/lgtm

[volcano-sh-bot]

New changes are detected. LGTM label has been removed.

[volcano-sh-bot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by:
Once this PR has been reviewed and has the lgtm label, please ask for approval from hzxuzhonghu. For more information see the Kubernetes Code Review Process.

The full list of commands accepted by this bot can be found here.

Details

Needs approval from an approver in each of these files:

• pkg/controllers/OWNERS

Approvers can indicate their approval by writing /approve in a comment
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[sahitya-chandra]

@hzxuzhonghu sir, can you have a look at this