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daemon: clean up weighted average calculation

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NotAShelf 2025-05-18 08:36:51 +03:00
parent 2efc0e1a6b
commit 63cab6e631
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1 changed files with 7 additions and 1 deletions
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8
src/daemon.rs
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@ -126,8 +126,14 @@ fn compute_new(params: &IntervalParams, system_history: &SystemHistory) -> u64 {
let blended_interval = if let Some(cached) = system_history.last_computed_interval { let blended_interval = if let Some(cached) = system_history.last_computed_interval {
// Use a weighted average: 70% previous value, 30% new value // Use a weighted average: 70% previous value, 30% new value
// This smooths out drastic changes in polling frequency // This smooths out drastic changes in polling frequency
const PREVIOUS_VALUE_WEIGHT: u128 = 7; // 70%
const NEW_VALUE_WEIGHT: u128 = 3; // 30%
const TOTAL_WEIGHT: u128 = PREVIOUS_VALUE_WEIGHT + NEW_VALUE_WEIGHT; // 10
// XXX: Use u128 arithmetic to avoid overflow with large interval values // XXX: Use u128 arithmetic to avoid overflow with large interval values
let result = (cached as u128 * 7 + new_interval as u128 * 3) / 10; let result = (cached as u128 * PREVIOUS_VALUE_WEIGHT
+ new_interval as u128 * NEW_VALUE_WEIGHT)
/ TOTAL_WEIGHT;
result as u64 result as u64
} else { } else {