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[subsystem-benchmarks] Log standart deviation for subsystem-benchmarks (#4285)

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Should help us to understand more what's happening between individual
runs and possibly adjust the number of runs
This commit is contained in:
Andrei Eres
2024-04-25 17:06:37 +02:00
committed by GitHub
parent 8f5c8f735a
commit dd5b06e622
1 changed files with 15 additions and 0 deletions
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polkadot/node/subsystem-bench/src/lib/usage.rs
+15
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@@ -161,6 +161,13 @@ impl ResourceUsage {
for (resource_name, values) in by_name {
let total = values.iter().map(|v| v.total).sum::<f64>() / values.len() as f64;
let per_block = values.iter().map(|v| v.per_block).sum::<f64>() / values.len() as f64;
let per_block_sd =
standard_deviation(&values.iter().map(|v| v.per_block).collect::<Vec<f64>>());
println!(
"[{}] standart_deviation {:.2}%",
resource_name,
per_block_sd / per_block * 100.0
);
average.push(Self { resource_name, total, per_block });
}
average
@@ -179,3 +186,11 @@ pub struct ChartItem {
pub unit: String,
pub value: f64,
}
fn standard_deviation(values: &[f64]) -> f64 {
let n = values.len() as f64;
let mean = values.iter().sum::<f64>() / n;
let variance = values.iter().map(|v| (v - mean).powi(2)).sum::<f64>() / (n - 1.0);
variance.sqrt()
}