func calculatePercent(t1, t2 *cpu.TimesStat, delta float64, numcpu int) float64 {
if delta == 0 {
return 0
}
delta_proc := t2.Total() - t1.Total()
overall_percent := ((delta_proc / delta) * 100) * float64(numcpu)
return overall_percent
}
// Calculate calculates the current cpu usage percentages
func (h *HostCpuStatsCalculator) Calculate(times cpu.TimesStat) (idle float64, user float64, system float64, total float64) {
currentIdle := times.Idle
currentUser := times.User
currentSystem := times.System
currentTotal := times.Total()
deltaTotal := currentTotal - h.prevTotal
idle = ((currentIdle - h.prevIdle) / deltaTotal) * 100
user = ((currentUser - h.prevUser) / deltaTotal) * 100
system = ((currentSystem - h.prevSystem) / deltaTotal) * 100
currentBusy := times.User + times.System + times.Nice + times.Iowait + times.Irq +
times.Softirq + times.Steal + times.Guest + times.GuestNice + times.Stolen
total = ((currentBusy - h.prevBusy) / deltaTotal) * 100
h.prevIdle = currentIdle
h.prevUser = currentUser
h.prevSystem = currentSystem
h.prevTotal = currentTotal
h.prevBusy = currentBusy
return
}
