chore(tracy): add GPU profiling subzones

[alandtse]

Summary

• Add Tracy GPU zones to UpscaleDepth: Upscaling - Depth Upscale, Upscaling - Underwater Mask, Upscaling - Depth VR Propagate
• Add Tracy GPU zones to DeferredPasses: Deferred Composite - Copies, Deferred Composite - Draw

Enables finer-granularity timing in Tracy captures for these passes.

Note: depends on #2193 (perf/vr-reduce-copies) for context; base branch can be updated to dev after that merges.

Test plan

• Build ALL-TRACY preset
• Verify sub-zones appear in Tracy capture under their parent zones

🤖 Generated with Claude Code

Summary by CodeRabbit

• Chores
  • Added performance profiling instrumentation to deferred rendering composite stage, enabling detailed tracking of rendering operations for improved performance analysis and debugging.
  • Added performance profiling instrumentation to upscaling operations, monitoring performance across depth enhancement and related processing stages for better visibility and optimization.

[coderabbitai]

Caution

Review failed

The pull request is closed.

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro

Run ID: 8958934b-c0ab-4e34-9687-09ded2710488

📥 Commits

Reviewing files that changed from the base of the PR and between 94ec842 and 6c7a049.

📒 Files selected for processing (2)

• src/Deferred.cpp
• src/Features/Upscaling.cpp

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📝 Walkthrough

Walkthrough

This pull request adds Tracy performance profiling instrumentation to two rendering operations. In the deferred composite stage, copy and draw operations are wrapped within separate profiling zones. Additionally, the depth upscaling function is instrumented with profiling markers around three sub-operations: depth upscale, underwater mask upscale, and VR depth propagation.

Changes

Cohort / File(s)	Summary
Deferred Composite Instrumentation src/Deferred.cpp	Wraps two CopySubresourceRegion operations into a TracyD3D11Zone labeled "Deferred Composite - Copies" and a subsequent Draw call into a zone labeled "Deferred Composite - Draw".
Upscaling Instrumentation src/Features/Upscaling.cpp	Adds three new TracyD3D11Zone markers around distinct sub-operations within UpscaleDepth(): depth upscale, underwater mask upscale, and VR depth propagation.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Possibly related PRs

• fix(VR): skip kSAO_CAMERAZ RTV in depth pass #2192: Modifies the same Upscaling::UpscaleDepth() function in src/Features/Upscaling.cpp, introducing related changes to the function's rendering behavior.
• refactor: use depthbuffer helper #1925: Modifies Deferred::DeferredPasses() in src/Deferred.cpp, touching the same instrumented function with depth SRV binding changes.
• perf: reduce copy operations #2193: Also modifies Upscaling::UpscaleDepth(), making it directly related at the code level.

Suggested reviewers

• jiayev
• davo0411
• doodlum

Poem

🐰 With Tracy's lens we now can see,
Where cycles dance and render be,
The zones now glow with profiled light,
Performance metrics, clear and bright! ✨

🚥 Pre-merge checks | ✅ 3 | ❌ 2

❌ Failed checks (2 warnings)

Check name	Status	Explanation	Resolution
Title check	⚠️ Warning	The title 'chore(tracy): add GPU profiling subzones' is partially related to the changeset. It accurately describes the primary focus of commit #2 and features like Tracy zones in Upscaling.cpp and Deferred.cpp, but overlooks the substantial performance optimization changes (zero-copy RCAS, DepthBlend CS inline writes, conditional depth copy) that constitute a significant portion of the actual changeset.	Consider a more comprehensive title that reflects both optimization and profiling aspects, such as 'perf(VR): reduce copies and add Tracy profiling' or separate the performance work into its own PR.
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
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.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[github-actions]

No actionable suggestions for changed features.

[github-actions]

✅ A pre-release build is available for this PR:
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