Greg Pomerantz
2f4768f354
Three root causes, all fixed and verified on the Pixel 9 Pro: 1. Present phase (backend + renderer): VSYNC_LOCKED_RENDER defers the render to the vsync wake; RENDER_AHEAD presents the previous frame at the start of render() (phase = wake + ~1.1 ms) and holds the new frame one slot. Crash fix: a held wgpu frame must be PRESENTED, never merely dropped, before the next acquire (AlreadyAcquired panic at launch otherwise); discard_pending_frame presents too. 2. Full-res prefetch churn (src/lib.rs): the 8-slot full cache cycled through a ~20-cell viewport forever (137 decodes/20 s) and each eviction free()'d a 50 MB Vec on the UI thread (20-52 ms CPU spikes, ~7/s = the residual SLOWEV NonMain jank). Fix: 60 s tombstone cooldown on evicted paths (idle prefetch skips, urgent tap bypasses) + off-thread reaper for the freed blobs (insert: 21 ms -> 4 us). 3. (earlier) Skia final flush + Mailbox present mode (vendor, M3). Instrumentation (all behind --features perf): OTHR/INVK/INVK_TAG/FLCK lines for cross-thread closure timing and push-site tagging. Warm measured swipe, 8580-file grid: cadence median 8.33 ms (exact 120 Hz), p99 15.5 ms, 5/552 gaps >16.7 ms (0.9%, max 28.3 ms, zero >33 ms); PRES phase median ~994 us, zero late frames. Docs updated (docs/BUGS/scroll-jank-120hz.md, full scorecard + line reference). Also: vendored i-slint-core + wgpu-hal (vkshim interposition patch), vkshim profiling tooling, backend made a non-optional dep, debuggable flag for simpleperf (REMOVE before shipping).
58 lines
1.7 KiB
Rust
58 lines
1.7 KiB
Rust
// Copyright © SixtyFPS GmbH <info@slint.dev>
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// SPDX-License-Identifier: GPL-3.0-only OR LicenseRef-Slint-Royalty-free-2.0 OR LicenseRef-Slint-Software-3.0
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//! This module contains various physics simulations which can be used as animation (internally only yet).
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//! Currently it is used in the flickable to animate the content position of the Flickable
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//!
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//! Currently it contains two simulations:
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//! - `ConstantDeceleration`
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//! - `ConstantDecelerationSpringDamper` with spring damper simulation when reaching the limit
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pub mod constant_deceleration;
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pub mod constant_deceleration_spring_damper;
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pub mod spring;
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use crate::animations::Instant;
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/// The direction the simulation is running
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#[derive(Debug)]
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enum Direction {
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/// The start value is smaller than the limit value
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Increasing,
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/// The start value is larger than the limit value
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Decreasing,
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}
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/// Common simulation trait
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/// All simulations must implement this trait
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pub trait Simulation {
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fn step(&mut self, current: &mut f32, new_tick: Instant) -> bool;
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}
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/// Trait to convert parameter objects into a simulation
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/// All parameter objects must implement this trait!
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pub trait Parameter {
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type Output;
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fn simulation(
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self,
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start_value: f32,
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limit_value: core::pin::Pin<alloc::boxed::Box<crate::Property<f32>>>,
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) -> Self::Output;
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}
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#[cfg(test)]
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macro_rules! assert_approx_eq {
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($a:expr, $b:expr) => {
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assert!(($a - $b).abs() < 1e-4, "{} != {}", $a, $b);
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};
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}
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#[cfg(test)]
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pub(crate) use assert_approx_eq;
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#[cfg(test)]
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pub(crate) fn test_limit_property(
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value: f32,
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) -> core::pin::Pin<alloc::boxed::Box<crate::Property<f32>>> {
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alloc::boxed::Box::pin(crate::Property::new(value))
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}
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