max / shop

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1	// vtebench-driven cell path workloads. On fw13 these shell out to the
2	// vtebench binary (https://github.com/alacritty/vtebench) and time shop's
3	// consumption of the corpus. The runner spawns shop, pipes the corpus to its
4	// stdin (or through the PTY primary once shop-bench can drive one), and
5	// samples PTY-drain throughput + wl-presentation-time frame stamps.
6
7	use anyhow::{Result, bail};
8
9	use super::{Workload, WorkloadResult};
10
11	pub(crate) struct Cat;
12	pub(crate) struct Scrolling;
13	pub(crate) struct Unicode;
14
15	impl Workload for Cat {
16	fn name(&self) -> &'static str {
17	"vtebench-cat"
18	}
19	fn description(&self) -> &'static str {
20	"vtebench --dat cat: raw byte throughput, hot cell path"
21	}
22	fn run(&self) -> Result<WorkloadResult> {
23	run_vtebench("cat", &["cell_throughput_mb_s", "frame_time_p99_ms"])
24	}
25	}
26
27	impl Workload for Scrolling {
28	fn name(&self) -> &'static str {
29	"vtebench-scrolling"
30	}
31	fn description(&self) -> &'static str {
32	"vtebench --dat scrolling: scroll+render frame time"
33	}
34	fn run(&self) -> Result<WorkloadResult> {
35	run_vtebench("scrolling", &["frame_time_p99_ms", "frame_time_p50_ms"])
36	}
37	}
38
39	impl Workload for Unicode {
40	fn name(&self) -> &'static str {
41	"vtebench-unicode"
42	}
43	fn description(&self) -> &'static str {
44	"vtebench --dat unicode: grapheme + width fast path"
45	}
46	fn run(&self) -> Result<WorkloadResult> {
47	run_vtebench("unicode", &["cell_throughput_mb_s"])
48	}
49	}
50
51	fn run_vtebench(_dat: &str, _metrics: &[&str]) -> Result<WorkloadResult> {
52	// fw13-only wiring lives here. Steps:
53	// 1. Resolve the vtebench binary (env SHOP_BENCH_VTEBENCH or PATH).
54	// 2. Spawn shop under a headless-Wayland fixture (weston --backend=headless
55	// or sway --no-outputs, TBD; see docs/typed-protocol.md phase 0).
56	// 3. Open a PTY, launch `vtebench --dat <_dat>` inside shop, and time
57	// the read-drain via a wrapper shell that timestamps EOF.
58	// 4. Sample presentation-time timestamps from shop via a debug socket
59	// (added under `--feature bench-hooks` on the shop binary).
60	// 5. Emit each name in `_metrics` as an f64.
61	bail!(
62	"vtebench workloads are fw13-only and not yet wired; \
63	see crates/shop-bench/src/workloads/vtebench.rs for the checklist"
64	)
65	}
66