mirror of https://github.com/k3s-io/k3s
91 lines
2.8 KiB
Go
91 lines
2.8 KiB
Go
package systemstat
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import (
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"log"
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"runtime"
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"strconv"
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)
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func notImplemented(fn string) {
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log.Printf("systemstat/%s is not implemented for this OS: %s\n", fn, runtime.GOOS)
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}
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func getSimpleCPUAverage(first CPUSample, second CPUSample) (avg SimpleCPUAverage) {
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//walltimediff := second.Time.Sub(first.Time)
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//dT := float64(first.Total - second.Total)
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dI := float64(second.Idle - first.Idle)
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dTot := float64(second.Total - first.Total)
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avg.IdlePct = dI / dTot * 100
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avg.BusyPct = (dTot - dI) * 100 / dTot
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//log.Printf("cpu idle ticks %f, total ticks %f, idle pct %f, busy pct %f\n", dI, dTot, avg.IdlePct, avg.BusyPct)
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return
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}
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func subtractAndConvertTicks(first uint64, second uint64) float64 {
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return float64(first - second)
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}
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func getCPUAverage(first CPUSample, second CPUSample) (avg CPUAverage) {
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dTot := float64(second.Total - first.Total)
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invQuotient := 100.00 / dTot
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avg.UserPct = subtractAndConvertTicks(second.User, first.User) * invQuotient
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avg.NicePct = subtractAndConvertTicks(second.Nice, first.Nice) * invQuotient
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avg.SystemPct = subtractAndConvertTicks(second.System, first.System) * invQuotient
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avg.IdlePct = subtractAndConvertTicks(second.Idle, first.Idle) * invQuotient
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avg.IowaitPct = subtractAndConvertTicks(second.Iowait, first.Iowait) * invQuotient
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avg.IrqPct = subtractAndConvertTicks(second.Irq, first.Irq) * invQuotient
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avg.SoftIrqPct = subtractAndConvertTicks(second.SoftIrq, first.SoftIrq) * invQuotient
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avg.StealPct = subtractAndConvertTicks(second.Steal, first.Steal) * invQuotient
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avg.GuestPct = subtractAndConvertTicks(second.Guest, first.Guest) * invQuotient
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avg.Time = second.Time
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avg.Seconds = second.Time.Sub(first.Time).Seconds()
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return
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}
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func getProcCPUAverage(first ProcCPUSample, second ProcCPUSample, procUptime float64) (avg ProcCPUAverage) {
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dT := second.Time.Sub(first.Time).Seconds()
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avg.UserPct = 100 * (second.User - first.User) / dT
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avg.SystemPct = 100 * (second.System - first.System) / dT
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avg.TotalPct = 100 * (second.Total - first.Total) / dT
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avg.PossiblePct = 100.0 * float64(runtime.NumCPU())
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avg.CumulativeTotalPct = 100 * second.Total / procUptime
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avg.Time = second.Time
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avg.Seconds = dT
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return
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}
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func parseCPUFields(fields []string, stat *CPUSample) {
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numFields := len(fields)
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stat.Name = fields[0]
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for i := 1; i < numFields; i++ {
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val, numerr := strconv.ParseUint(fields[i], 10, 64)
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if numerr != nil {
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log.Println("systemstat.parseCPUFields(): Error parsing (field, value): ", i, fields[i])
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}
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stat.Total += val
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switch i {
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case 1:
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stat.User = val
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case 2:
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stat.Nice = val
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case 3:
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stat.System = val
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case 4:
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stat.Idle = val
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case 5:
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stat.Iowait = val
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case 6:
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stat.Irq = val
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case 7:
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stat.SoftIrq = val
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case 8:
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stat.Steal = val
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case 9:
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stat.Guest = val
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}
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}
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}
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