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Weighted Fairness + 3-Leveled Pressure Model

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Co-Authored-By: brekotis <93345790+brekotis@users.noreply.github.com>
This commit is contained in:
Alexey
2026-04-18 00:37:04 +03:00
parent 50e9e5cf32
commit 37b6f7b985
4 changed files with 109 additions and 37 deletions
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58
src/transport/middle_proxy/fairness/pressure.rs
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@@ -146,59 +146,55 @@ impl PressureEvaluator {
((signals.standing_flows.saturating_mul(100)) / signals.active_flows).min(100) as u8
};
let mut pressure_score = 0u8;
let mut pressured = false;
let mut saturated = false;
let queue_saturated_pct = cfg.queue_ratio_shedding_pct.min(cfg.queue_ratio_saturated_pct);
if queue_ratio_pct >= cfg.queue_ratio_pressured_pct {
pressure_score = pressure_score.max(1);
pressured = true;
}
if queue_ratio_pct >= cfg.queue_ratio_shedding_pct {
pressure_score = pressure_score.max(2);
}
if queue_ratio_pct >= cfg.queue_ratio_saturated_pct {
pressure_score = pressure_score.max(3);
if queue_ratio_pct >= queue_saturated_pct {
saturated = true;
}
let standing_saturated_pct = cfg
.standing_ratio_shedding_pct
.min(cfg.standing_ratio_saturated_pct);
if standing_ratio_pct >= cfg.standing_ratio_pressured_pct {
pressure_score = pressure_score.max(1);
pressured = true;
}
if standing_ratio_pct >= cfg.standing_ratio_shedding_pct {
pressure_score = pressure_score.max(2);
}
if standing_ratio_pct >= cfg.standing_ratio_saturated_pct {
pressure_score = pressure_score.max(3);
if standing_ratio_pct >= standing_saturated_pct {
saturated = true;
}
let rejects_saturated = cfg.rejects_shedding.min(cfg.rejects_saturated);
if self.admission_rejects_window >= cfg.rejects_pressured {
pressure_score = pressure_score.max(1);
pressured = true;
}
if self.admission_rejects_window >= cfg.rejects_shedding {
pressure_score = pressure_score.max(2);
}
if self.admission_rejects_window >= cfg.rejects_saturated {
pressure_score = pressure_score.max(3);
if self.admission_rejects_window >= rejects_saturated {
saturated = true;
}
let stalls_saturated = cfg.stalls_shedding.min(cfg.stalls_saturated);
if self.route_stalls_window >= cfg.stalls_pressured {
pressure_score = pressure_score.max(1);
pressured = true;
}
if self.route_stalls_window >= cfg.stalls_shedding {
pressure_score = pressure_score.max(2);
}
if self.route_stalls_window >= cfg.stalls_saturated {
pressure_score = pressure_score.max(3);
if self.route_stalls_window >= stalls_saturated {
saturated = true;
}
if signals.backpressured_flows > signals.active_flows.saturating_div(2)
&& signals.active_flows > 0
{
pressure_score = pressure_score.max(2);
pressured = true;
}
match pressure_score {
0 => PressureState::Normal,
1 => PressureState::Pressured,
2 => PressureState::Shedding,
_ => PressureState::Saturated,
if saturated {
PressureState::Saturated
} else if pressured {
PressureState::Pressured
} else {
PressureState::Normal
}
}