Add: test host input refresh across L3 dispatches

[vegetabledoww]

Exercise repeated in-place updates of small ID tensors and larger activation tensors across two reused L3 workers.

Validate that every dispatch stages the current fork-shared host values before AICore execution, covering the stale-input failure reported in issue #929.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: dbab8950-3e2f-41ab-a657-27d8dcb93839

📥 Commits

Reviewing files that changed from the base of the PR and between ad4acaf and 5370015.

📒 Files selected for processing (3)

• tests/st/a2a3/tensormap_and_ringbuffer/host_input_refresh/kernels/aic/kernel_copy_first.cpp
• tests/st/a2a3/tensormap_and_ringbuffer/host_input_refresh/kernels/orchestration/copy_first_orch.cpp
• tests/st/a2a3/tensormap_and_ringbuffer/host_input_refresh/test_host_input_refresh.py

Included review availability: Your plan includes up to 1 review per rolling hour; 0 remain after this review.

---

📝 Walkthrough

Walkthrough

This change adds an AIC copy kernel and orchestration entry points. A scene test updates shared host inputs across multiple rounds and verifies refreshed INT64 and FP32 outputs for two ranks.

Changes

Host input refresh

Layer / File(s)	Summary
AIC copy kernel tests/st/a2a3/tensormap_and_ringbuffer/host_input_refresh/kernels/aic/kernel_copy_first.cpp	Adds kernel_entry, which copies ID and activation inputs to outputs and flushes both output cache lines.
Orchestration task wiring tests/st/a2a3/tensormap_and_ringbuffer/host_input_refresh/kernels/orchestration/copy_first_orch.cpp	Adds configuration and entry functions that map four tensors and submit the AIC task.
Repeated scene validation tests/st/a2a3/tensormap_and_ringbuffer/host_input_refresh/test_host_input_refresh.py	Adds two-rank callable setup, shared-memory tensors, repeated input updates, task dispatches, output assertions, cleanup, and standalone execution.

Estimated code review effort: 3 (Moderate) | ~20 minutes

Merge Risk: ⚪ Minimal · up to 53700

This PR adds targeted coverage for refreshing host inputs across repeated dispatches without changing production behavior; no actionable merge-blocking risk remains beyond normal checks and review.

Sequence Diagram(s)

sequenceDiagram
  participant SceneTest
  participant Orchestration
  participant AICKernel
  participant SharedHostMemory
  SceneTest->>SharedHostMemory: update ID and activation inputs
  SceneTest->>Orchestration: dispatch retained task arguments
  Orchestration->>AICKernel: submit mapped input and output tensors
  AICKernel->>SharedHostMemory: read refreshed inputs
  AICKernel->>SharedHostMemory: write outputs and flush cache lines
  SceneTest->>SharedHostMemory: validate refreshed outputs

Loading

Poem

A rabbit hops through buffers bright,
Refreshing IDs in morning light.
Activations follow, outputs gleam,
Cache lines flush beside the stream.
Two ranks check each changing round,
And clean task arguments from the ground.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
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 (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly summarizes the added test for host input refresh across repeated L3 dispatches.
Description check	✅ Passed	The description explains the repeated updates, reused L3 workers, validation, and stale-input issue covered by the changes.
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.

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands.}