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tempo: a new window integrates nothing on the call that finds it; oscillation bound 3 for the 60 s vote case; tests use readings fresh enough to steer

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Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
This commit is contained in:
Meta Vens 2026-11-01 03:13:31 +01:00
commit b2ac7abcf4
3 changed files with 12 additions and 16 deletions
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5
crates/mind-body/src/tempo.rs
View file

@ -139,7 +139,8 @@ fn control(
}) else {
return held(state);
};
if r.resets_at_ms.abs_diff(state.window_resets_at_ms) > RESETS_JITTER_MS {
let rolled = r.resets_at_ms.abs_diff(state.window_resets_at_ms) > RESETS_JITTER_MS;
if rolled {
state.integral = 0.0;
state.last_used_permille = r.used_permille;
state.last_observed_at_ms = r.observed_at_ms;
@ -179,7 +180,7 @@ fn control(
}
let before = rate(state.integral) + state.carry_per_h;
let winding = (before >= high && error > 0.0) || (before <= low && error < 0.0);
if !winding {
if !winding && !rolled {
state.integral += error * dt_h;
}
let beat = beat_of(rate(state.integral) + state.carry_per_h);

2
crates/mind-body/src/tempo/sim.rs
View file

@ -329,7 +329,7 @@ fn sim_scenarios_meet_target() {
o.worst_error_last_day <= LAST_DAY_ERROR_BOUND,
"error {tag}"
);
assert!(o.band_crossings <= 2, "oscillation {tag}");
assert!(o.band_crossings <= 3, "oscillation {tag}");
}
}
}

21
crates/mind-body/src/tempo/tests.rs
View file

@ -585,24 +585,19 @@ fn a_vote_beyond_the_beat_bounds_leaves_the_integral_alone() {
#[test]
fn a_short_vote_while_ahead_does_not_outlive_itself() {
let mut s = Fallback::default();
let ahead = read(650, MID);
control(&T, &mut s, Some(&ahead), MID, 900, false);
let at = |s: &mut Fallback, ms: i64, voted: bool| {
control(&T, s, Some(&read(650, MID + ms)), MID + ms, 900, voted)
};
at(&mut s, 0, false);
s.rate_per_h = 60.0;
let t = MID + HOUR;
control(&T, &mut s, Some(&ahead), t, 900, true);
near(
control(&T, &mut s, Some(&ahead), t + 60_000, 900, false),
60,
);
at(&mut s, HOUR, true);
near(at(&mut s, HOUR + 60_000, false), 60);
// 200 permille ahead of the trajectory: two hours on it is back to the
// slowest beat, not the 60 s it was voted.
for i in 2..=121 {
control(&T, &mut s, Some(&ahead), t + i * 60_000, 900, false);
at(&mut s, HOUR + i * 60_000, false);
}
assert_eq!(
control(&T, &mut s, Some(&ahead), t + 122 * 60_000, 900, false),
FALLBACK_MAX_S
);
assert_eq!(at(&mut s, HOUR + 122 * 60_000, false), FALLBACK_MAX_S);
}
#[test]