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feat(perf): frame timing for every presented frame, a soak tool, a render bench and a stall watchdog (#629)

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src/common/frame_timing.py times every frame the display presents, whoever drew it, and writes cumulative counters to /dev/shm. scripts/frame_soak.py grades a running service (late frames, freezes, where the time goes) and scripts/render_bench.py the hardware and render path alone. A stall watchdog logs the stacks behind any scroll held up for 250 ms or more (LEDMATRIX_STALL_WATCHDOG_MS lowers that). See docs/SCROLL_PERFORMANCE.md, "Soaking a rig".

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Chuck
2026-09-24 19:38:49 -04:00
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co-authored by Claude Opus 5.5
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@@ -37,6 +37,7 @@
- Browser preview without the display loop: `python3 scripts/dev_server.py` → http://localhost:5001
- Full display in emulator mode: `python3 run.py -e` (or `EMULATOR=true python3 run.py`)
- Validate one plugin headlessly: `python3 scripts/check_plugin.py --plugin <id>`
- Soak a rig for frame timing (on the Pi, service running): `python3 scripts/frame_soak.py --preview` — late-frame rate across every scroller; see `docs/SCROLL_PERFORMANCE.md`
## Plugin Store Architecture
- Official plugins live in the `ledmatrix-plugins` monorepo (not individual repos)