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Switched to median dt for stable dt

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This commit is contained in:
Joshua Barretto 2022-09-02 18:21:24 +01:00
parent 6c456ac113
commit 6a1e560906
1 changed files with 15 additions and 10 deletions
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25
common/src/clock.rs
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@ -77,16 +77,21 @@ impl Clock {
pub fn dt(&self) -> Duration { self.last_dt }
pub fn get_stable_dt(&self) -> Duration {
let stable_dt = Duration::from_secs_f32(
self.last_dts
.iter()
.skip(self.last_dts.len() - NUMBER_OF_DELTAS_COMPARED)
.min()
.map_or(self.last_dt.as_secs_f32(), |t| t.into_inner()),
);
if self.last_dts.len() >= NUMBER_OF_DELTAS_COMPARED && self.last_dt > 2 * stable_dt {
tracing::trace!(?self.last_dt, ?self.total_tick_time, "lag spike detected, unusually slow tick");
stable_dt
if self.last_dts.len() >= NUMBER_OF_DELTAS_COMPARED {
// Take the median of the last few tick times
let mut dts = [0.0; NUMBER_OF_DELTAS_COMPARED];
for (i, dt) in self.last_dts.iter().rev().take(NUMBER_OF_DELTAS_COMPARED).enumerate() {
dts[i] = **dt;
}
dts.sort_by_key(|x| ordered_float::OrderedFloat(*x));
let stable_dt = Duration::from_secs_f32(dts[NUMBER_OF_DELTAS_COMPARED / 2]);
if self.last_dt > 2 * stable_dt {
tracing::trace!(?self.last_dt, ?self.total_tick_time, "lag spike detected, unusually slow tick");
stable_dt
} else {
self.last_dt
}
} else {
self.last_dt
}