Greg Pomerantz
c72bfa481d
Measurements only, no behavior change: - vsync.rs: EW lines (every early-waker landing, EW_ON flag, off by default) - lib.rs/stg.rs: IT lines gain dec (locked/saw_wake/pr_before/do_render) and pcpu (CPU us inside poll_events — 2% = asleep in epoll, rules out CPU spin/deschedule as the wake latency) Findings (docs/BUGS/hypotheses-120hz.md, sltest baseline): - Choreographer callback fires at edge+0.52ms (p90 0.65) — the 'late Choreographer' model from earlier sessions was a mislabeled STG field (poll block time, not callback latency). The pipeline actually works at median: present at edge+~4ms, inside the 5.5ms deadline. - sltest zero-jank definition measured: 98.8% of frames land in the next display slot; residual = 0.5-0.7% drops + 0.7-0.9% doubles + 1.4ms phase spread (p10-p90) = the visible micro-judder. - Residual cost is VARIANCE, not median: per-frame render 3.5ms median (SKD 1.07 + CLR 0.8 + PRE 1.0 + SKF/ORD 0.65) with spikes to 10.7ms (SKD max 5.2, CLR max 3.2, PRE max 2.5). Spikes push presents past the deadline (drops) and shake the phase (judder). Next: classify spikes (CPU work vs GPU/driver block) via render-window CPU splits, then kill the top source. |
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|---|---|---|
| .. | ||
| java | ||
| LICENSES | ||
| .cargo_vcs_info.json | ||
| .cargo-ok | ||
| androidwindowadapter.rs | ||
| build.rs | ||
| Cargo.lock | ||
| Cargo.toml | ||
| Cargo.toml.orig | ||
| javahelper.rs | ||
| lib.rs | ||
| README.md | ||
| stg.rs | ||
| vsync.rs | ||
NOTE: This library is an internal crate of the Slint project.
WARNING: This crate does not follow the semver convention for versioning and can
only be used with version = "=x.y.z" in Cargo.toml.
Slint Android Activity Backend
This crate implements the Android backend/platform for Slint.
It uses the android-activity crate to initialize the app and provide events handling.
It can be used by using functions from the slint::android module