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Docs (P15): windowed out-of-process smoke of the LTO plugin passes on both backends; aux-socket shared-image send error noted.

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swung0x48
2026-10-09 12:54:30 -04:00
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docs/Disaggregated/notes/perf-p15/HANDOFF.md
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@@ -118,10 +118,18 @@ The plan and its measurements are in [PLAN-P15.md](PLAN-P15.md); the audit is in
- The `Fatal{UnmigratedSurface, "AndroidNativeWindow@P12"}` text and the tests asserting on it still
point at P12. The rule is permanent: a client window cannot cross processes, so windowed spawn uses
`MOBILEGL_IPC_SURFACE=server`. Reword the message to say that.
- A windowed spawn smoke of the LTO plugin APK with `MOBILEGL_IPC_SURFACE=server`. The LTO server
executable has already been seen to launch and initialise both backends. This needs the plugin APK
installed with its release signature, or the user's OK to replace the installed plugin. Spawn with
the default `offscreen` surface in FCL is unsupported by design (`UnmigratedSurface`).
- DONE 2026-10-09: the windowed out-of-process smoke of the LTO plugin APK passes on both backends.
The plugin is debug-signed and replaced the installed one, with the user's OK. Setup:
- server: the plugin's `MobileGLDisplayActivity`, i.e. the `:mglwin` in-process server on
`tcp://127.0.0.1:40613`;
- client: FCL with `MOBILEGL_TRANSPORT=spawn`, `MOBILEGL_IPC_CONTROL=tcp://127.0.0.1:40613` and
`MOBILEGL_IPC_SURFACE=server`. ServerOwned 1280x800 window, Espryt and Magma both in-world.
A plain spawned child has no display (`NoServerDisplay`). Evidence is in the coordinator scratchpad,
`p15/runs/spawn_smoke2/`.
- Open from that run: every run logs `MG_Remote server: shared image 1 could not be sent on the aux
socket (rc=3)`. Rendering continues, apparently on the non-zero-copy fallback. Find out why the
loopback-TCP aux-socket send fails.
**Harness rules (all in scratchpad `p15/`; the tools live in `tools/device_bench/disagg/`):**
- H2 = `fcl_bench.sh`, driven by `fclab2.sh` for interleaved arms; summaries come from `fclsum.py`.