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fix(metrics): stabilize cpu and power sampling

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This commit is contained in:
Mikhail Chusavitin
2026-04-01 09:40:42 +03:00
parent 4e4debd4da
commit c95bbff23b
5 changed files with 145 additions and 11 deletions
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16
audit/internal/platform/live_metrics.go
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@@ -68,18 +68,20 @@ func SampleLiveMetrics() LiveMetricSample {
// sampleCPULoadPct reads two /proc/stat snapshots 200ms apart and returns
// the overall CPU utilisation percentage.
var cpuStatPrev [2]uint64 // [total, idle]
func sampleCPULoadPct() float64 {
total, idle := readCPUStat()
if total == 0 {
total0, idle0 := readCPUStat()
if total0 == 0 {
return 0
}
prevTotal, prevIdle := cpuStatPrev[0], cpuStatPrev[1]
cpuStatPrev = [2]uint64{total, idle}
if prevTotal == 0 {
time.Sleep(200 * time.Millisecond)
total1, idle1 := readCPUStat()
if total1 == 0 {
return 0
}
return cpuLoadPctBetween(total0, idle0, total1, idle1)
}
func cpuLoadPctBetween(prevTotal, prevIdle, total, idle uint64) float64 {
dt := float64(total - prevTotal)
di := float64(idle - prevIdle)
if dt <= 0 {