[dotCooCoo]

gop::tests::rayon_frame_requests_while_decoding_on_rayon_never_deadlock (filmcraft-codecs) gave its 3,840 frame requests 120 s in total and reported "frame requests deadlocked" when they took longer. On a loaded machine they take longer while every request is still answered: a run with a progress count printed every 10 s answered requests at a steady rate and finished in 223 s.

• The test counts answered requests and fails when none is answered for 120 s. A failed request on the worker thread now reports "a frame request failed" instead of "frame requests deadlocked".

Test, on Windows 11 (x86-64) with rustc 1.99.1, with six copies of the test running at once, two rounds:

• On main at bfc2384: 12 of 12 runs failed after 121 to 123 s with "frame requests deadlocked".
• With this change: 12 of 12 runs passed, in 166 to 259 s.
• With the Export stops making frames for good with two or three iPhone HEVC clips (Linux, 0.4.0); full-range iPhone video probed as limited range #480 fix in isolated turned off (the decode pool not used), the test still fails: "frame requests deadlocked after 927 frames".

Checks:

• cargo fmt --all -- --check and cargo clippy -p filmcraft-codecs --all-targets -- -D warnings: ok.

On Windows 11 (x86-64) with rustc 1.99.1, on top of main at bfc2384 with #2386, #2057, #2138 and #3225 merged in (they fix tests that fail on main on Windows), with RUST_TEST_THREADS=2:

• CRAFT_FONTS_DIR=<craft-fonts checkout> cargo xtask ci: fmt and clippy passed; the test step ran 113 test binaries with 3,669 passed, 1 failed and 46 ignored, and this test passed in it. The doctests (8 passed), layers, assets and wasm then passed, each run on its own.
• The failure: media_foundation::av1_8bit_is_bit_exact (filmcraft-platform) reported "stayed in hardware (FilmCraft AV1)": the hardware AV1 decoder fell back to the software one on the loaded machine. It passed in 3 of 3 runs on its own. This change does not touch crates/platform.

git merge-tree reports no conflicts with main at bfc2384.

Summary by CodeRabbit

• Tests
  • Improved deadlock test monitoring to detect stalled progress over time while still reporting worker disconnections.

[coderabbitai]

Walkthrough

The Rayon deadlock test now checks frame-request progress in repeated 120-second intervals. It fails when no requests complete during an interval or when the worker disconnects.

Changes: Rayon deadlock test

Layer / File(s)	Summary
Progress-based timeout handling crates/codecs/src/gop.rs	The test counts completed frame requests and checks whether the count advances during each 120-second interval. It reports a deadlock when progress stops and still reports worker disconnection.

Priority: Normal

Estimated code review effort: 2 (Simple) | ~10 minutes

Change: Bug fix

Possibly related issues

• av1: a panic in a frame worker hangs the decoder #3096 — The test now detects stalled decoder work, but it does not add the decoder panic recovery described in the issue.

Possibly related PRs

• storytold/filmcraft#3046 — Changes Rayon isolation for decode work; this PR updates the deadlock test for that execution path.
• storytold/filmcraft#3217 — Changes concurrent GopCache frame requests; this PR monitors progress from those requests.

Suggested reviewers: mrcloudy2

Merge Risk: Low · up to 995c4

The test may take an unnecessarily long time to report a genuine stall, but this affects failure detection rather than production behavior.

Architecture risk: Low · up to 995c4

The change affects 1 system.

Changed systems: crates

Architecture concerns
No architecture-level concerns identified.

Review details

Systems and components

• observed — crates (service) was modified; 1 changed file maps to changed impact.

Before / after behavior

• observed — Modified behavior in crates/codecs/src/gop.rs: The test now counts completed frame requests and waits in repeated 120-second intervals. A timeout fails only if the completion count has not advanced since the previous interval; worker disconnection still fails the test. This replaces the former single 120-second deadline for the entire workload.

Pre-merge checks: 5

Check name	Status	Explanation
Description Check		Check skipped - CodeRabbit’s high-level summary is enabled.
Title check		The title clearly and concisely describes the main change: the rayon deadlock test now allows 120 seconds between answered frame requests.
Docstring Coverage		Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 1 functions across 1 files.
Linked Issues check		Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check		Check skipped because no linked issues were found for this pull request.

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Actionable comments posted: 1

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• 🪄 Fix comments: Fix CodeRabbit comments on this PR

Prompt to fix review comments

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Inline comments:
Review comments at @crates/codecs/src/gop.rs:
- Line 1103: Update the `rx.recv_timeout` wait to poll more frequently and track
when a response is observed; measure the 120-second deadline from the last
observed progress so further waits cannot extend it past that limit.

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• Repository: storytold/filmcraft
• Branch: main
• File: .coderabbit.yaml
• Commit: bfc2384
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Files selected for processing: 1

• crates/codecs/src/gop.rs

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[FredApps]

Approving. Test-only change: the GOP rayon deadlock test no longer allows 120 s for all 3,840 frame requests together; it counts answered requests and fails only when a 120 s wait ends with no more answered than at the previous wait (a real deadlock), and reports a disconnected channel as a failed request. I read the whole diff; the gate and SonarCloud pass at 995c44e. I read the code and the CI results; I did not run the app.

[echelon]

Merged, thank you @dotCooCoo! It went in with a batch of community PRs after fmt, clippy and the affected crates' tests passed on the combined branch.

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