func captureRusageStats(r metrics.Registry, d time.Duration) {
for {
ru := getRusage()
time.Sleep(d)
ru2 := getRusage()
if ru == nil || ru2 == nil {
continue
}
rVals := map[string]int64{
"UserTime": syscall.TimevalToNsec(ru2.Utime) - syscall.TimevalToNsec(ru.Utime),
"SystemTime": syscall.TimevalToNsec(ru2.Stime) - syscall.TimevalToNsec(ru.Stime),
"MaxRss": ru.Maxrss,
"InBlock": ru2.Inblock - ru.Inblock,
"OuBlock": ru2.Oublock - ru.Oublock,
}
for metric, val := range rVals {
if g := getGauge(r, "rusage."+metric); g != nil {
g.(metrics.Gauge).Update(val)
}
}
}
}
// CPUtime returns the current CPU usage (user time + system time).
func CPUtime() time.Duration {
var ustruct syscall.Rusage
rx.CkErr(syscall.Getrusage(0, &ustruct))
user := time.Duration(syscall.TimevalToNsec(ustruct.Utime))
sys := time.Duration(syscall.TimevalToNsec(ustruct.Stime))
return user + sys
return 0
}
func (i *Instrumentation) sampleRusage(ru, ru2 *syscall.Rusage) {
if ru == nil || ru2 == nil {
return
}
i.Gauge(1.0, "rusage.userTime", int(syscall.TimevalToNsec(ru2.Utime)-syscall.TimevalToNsec(ru.Utime)))
i.Gauge(1.0, "rusage.systemTime", int(syscall.TimevalToNsec(ru2.Stime)-syscall.TimevalToNsec(ru.Stime)))
i.Gauge(1.0, "rusage.maxRss", int(ru.Maxrss))
i.Gauge(1.0, "rusage.inBlock", int(ru2.Inblock-ru.Inblock))
i.Gauge(1.0, "rusage.outBlock", int(ru2.Oublock-ru.Oublock))
}
func (ct cpuTimeMetric) Collect(ch chan<- prometheus.Metric) {
var rusage syscall.Rusage
if err := syscall.Getrusage(syscall.RUSAGE_SELF, &rusage); err == nil {
m := ct.counter.WithLabelValues("user")
m.Set(float64(syscall.TimevalToNsec(rusage.Utime)))
ch <- m
m = ct.counter.WithLabelValues("system")
m.Set(float64(syscall.TimevalToNsec(rusage.Stime)))
ch <- m
}
}
func TimevalToDuration(tv syscall.Timeval) time.Duration {
ns := syscall.TimevalToNsec(tv)
return time.Duration(ns) * time.Nanosecond
}