Fix stale data generation comment in generate_input.hpp

[VaggelisGian]

Description

The file-level comment in cpp/benchmarks/common/generate_input.hpp claimed that random data generation happens on the CPU and is then copied to device memory. The implementation actually fills device buffers directly on the GPU (thrust::tabulate over the device policy in generate_input.cu), and docs/benchmarking.md already documents device-side generation. This corrects the stale comment so it matches the actual behavior.

Comment-only change: no code paths, build targets, or runtime behavior are affected.

Checklist

• I am familiar with the Contributing Guidelines.
• New or existing tests cover these changes.
• The documentation is up to date with these changes.

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[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

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Run ID: 401e09f4-ceee-4477-a3c1-f4ec927bbb50

📥 Commits

Reviewing files that changed from the base of the PR and between e1b2d27 and 5b3d82d.

📒 Files selected for processing (1)

• cpp/benchmarks/common/generate_input.hpp

🚧 Files skipped from review as they are similar to previous changes (1)

• cpp/benchmarks/common/generate_input.hpp

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📝 Walkthrough

Summary by CodeRabbit

• Documentation
  • Clarified that random input generation occurs directly on the device, rather than on the host followed by a device-memory copy.

Walkthrough

The benchmark documentation retains the statement that input generation occurs on the device and removes the comparison with host-side column_wrapper generation.

Changes

Benchmark input generation

Layer / File(s)	Summary
Device-side generation documentation cpp/benchmarks/common/generate_input.hpp	The documentation removes the host-side column_wrapper comparison and retains the device-side input generation statement.

Estimated code review effort: 1 (Trivial) | ~2 minutes

Merge Risk: ⚪ Minimal · up to 5b3d8

This change only corrects an outdated benchmark comment and does not alter code paths or runtime behavior; no actionable merge-blocking risk remains after normal checks and review.

Suggested reviewers: mattgara

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly identifies the main change: correcting a stale data-generation comment in generate_input.hpp.
Description check	✅ Passed	The description accurately explains the stale comment, the actual device-side generation behavior, and the comment-only scope of the change.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 1…
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

Full details: Docstring Coverage

Explanation

No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 1 files.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[PointKernel]

Thanks for catching this.

[PointKernel]

/ok to test 5b3d82d

[PointKernel]

/ok to test 14e9365