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perf(agent,non-linux): enable CPU core normalization by default; tighter scaling threshold

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jasonwitty 2025-08-25 23:50:26 -07:00
parent e2dc5e8ac9
commit c9ebea92f5
1 changed files with 7 additions and 6 deletions
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11
socktop_agent/src/metrics.rs
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@ -17,15 +17,15 @@ use sysinfo::{ProcessRefreshKind, ProcessesToUpdate};
use tracing::warn;
// Optional normalization: divide per-process cpu_usage by logical core count so a fully
// saturated multi-core process reports near 100% instead of N*100%. Enable via
// SOCKTOP_AGENT_NORMALIZE_CPU=1. Default keeps raw sysinfo semantics.
// saturated multi-core process reports near 100% instead of N*100%. Enabled by default on
// non-Linux (macOS/Windows) to counter per-core summing; disable with SOCKTOP_AGENT_NORMALIZE_CPU=0.
#[cfg(not(target_os = "linux"))]
fn normalize_cpu_enabled() -> bool {
static ON: OnceCell<bool> = OnceCell::new();
*ON.get_or_init(|| {
std::env::var("SOCKTOP_AGENT_NORMALIZE_CPU")
.map(|v| v != "0")
.unwrap_or(false)
.unwrap_or(true)
})
}
// Runtime toggles (read once)
@ -477,7 +477,7 @@ pub async fn collect_processes_all(state: &AppState) -> ProcessesPayload {
})
.collect();
// Automatic scaling (enabled by default): if sum of per-process CPU exceeds global
// CPU by >25%, scale all process CPU values proportionally so the sum matches global.
// CPU by >5%, scale all process CPU values proportionally so the sum matches global.
if std::env::var("SOCKTOP_AGENT_SCALE_PROC_CPU")
.map(|v| v != "0")
.unwrap_or(true)
@ -486,7 +486,8 @@ pub async fn collect_processes_all(state: &AppState) -> ProcessesPayload {
let global = sys.global_cpu_usage();
if sum > 0.0 && global > 0.0 {
let scale = global / sum;
if scale < 0.75 { // only scale if we're at least 25% over
if scale < 0.95 {
// only scale if we're at least 5% over
for p in &mut list {
p.cpu_usage = (p.cpu_usage * scale).clamp(0.0, 100.0);
}