func showOneStats(handlers []*StatsHandler, delay string, path string) {
d, err := time.ParseDuration(delay)
if err != nil {
fmt.Printf("Unrecognized duration '%s', using '1s' instead\n", delay)
d = 1 * time.Second
}
var handler *StatsHandler
for _, h := range handlers {
if h.path == path {
handler = h
break
}
}
if handler == nil {
fmt.Printf("No such handler: %s\n", path)
return
}
var prev, curr, diff Stats
var w tabwriter.Writer
w.Init(os.Stdout, 5, 0, 2, ' ', tabwriter.AlignRight)
start := clock.Monotonic.Now()
A, _ := linuxproc.ReadStat("/proc/stat")
for {
time.Sleep(d)
curr.AtomicCopy(&handler.Stats)
B, _ := linuxproc.ReadStat("/proc/stat")
end := clock.Monotonic.Now()
elapsed := end.Sub(start)
start = end
showstat(B, A)
A = B
diff = curr.Sub(prev)
fmt.Printf("Load statistics for %s\n", path)
fmt.Fprintf(&w, "\tops\tops/sec\tsec/op\terrs\t\n")
fmt.Fprintf(&w, "\t")
fmt.Fprintf(&w, "%d\t", diff.nok)
fmt.Fprintf(&w, "%0.2f/sec\t", (float64)(diff.nok)/elapsed.Seconds())
if diff.nok == 0 {
fmt.Fprintf(&w, "%s\t", "-")
} else {
fmt.Fprintf(&w, "%s\t", time.Duration(diff.tok/diff.nok))
}
fmt.Fprintf(&w, "%d\t\n", diff.nerr)
w.Flush()
prev = curr
}
}
func (csc contextSwitchChecker) count() uint64 {
d, err := linuxproc.ReadStat(*hostPath + "/proc/stat")
if err != nil {
panic(fmt.Sprintf("Cannot read disk info of %s file system.", *hostPath+"/proc/stat"))
}
return d.ContextSwitches
}
// Report resource collection.
func (c *CPU) Report() {
var prevTotal, prevIdle uint64
prev := new(linux.Stat)
for {
select {
case <-time.Tick(c.Interval):
log.Info("cpu: reporting")
stat, err := linux.ReadStat(c.Path)
if err != nil {
log.Error("cpu: %s", err)
continue
}
c.client.Gauge("percent", int(percent(&prevIdle, &prevTotal, stat.CPUStatAll)))
if c.Extended {
c.client.IncrBy("blocked", int(stat.ProcsBlocked))
c.client.IncrBy("interrupts", int(stat.Interrupts-prev.Interrupts))
c.client.IncrBy("switches", int(stat.ContextSwitches-prev.ContextSwitches))
}
prev = stat
case <-c.exit:
log.Info("cpu: exiting")
return
}
}
}
func GetCPU() {
stat, err := linuxproc.ReadStat("/proc/stat")
if err != nil {
fmt.Errorf("stat read fail")
return
}
unixTs := time.Now().Unix()
if hostname == "" {
hostname, _ = os.Hostname()
}
f := bufio.NewWriter(os.Stdout)
defer f.Flush()
for i := 0; i < len(stat.CPUStats); i++ {
s := stat.CPUStats[i]
b := submit_cpu(i, "user", unixTs, s.User)
b += submit_cpu(i, "nice", unixTs, s.Nice)
b += submit_cpu(i, "system", unixTs, s.System)
b += submit_cpu(i, "idle", unixTs, s.Idle)
b += submit_cpu(i, "iowait", unixTs, s.IOWait)
b += submit_cpu(i, "irq", unixTs, s.IRQ)
b += submit_cpu(i, "softirq", unixTs, s.SoftIRQ)
b += submit_cpu(i, "steal", unixTs, s.Steal)
f.Write([]byte(b))
}
}
func GetCPUPercent() {
stat, err := linuxproc.ReadStat("/proc/stat")
if err != nil {
fmt.Errorf("stat read fail")
return
}
unixTs := time.Now().Unix()
if hostname == "" {
hostname, _ = os.Hostname()
}
f := bufio.NewWriter(os.Stdout)
defer f.Flush()
s := stat.CPUStatAll
total := float64(s.User + s.Nice + s.System + s.Idle + s.IOWait + s.IRQ + s.SoftIRQ + s.Steal)
b := submit_cpu_percent("user", unixTs, float64(s.User)/total)
b += submit_cpu_percent("nice", unixTs, float64(s.Nice)/total)
b += submit_cpu_percent("system", unixTs, float64(s.System)/total)
b += submit_cpu_percent("idle", unixTs, float64(s.Idle)/total)
b += submit_cpu_percent("iowait", unixTs, float64(s.IOWait)/total)
b += submit_cpu_percent("irq", unixTs, float64(s.IRQ)/total)
b += submit_cpu_percent("softirq", unixTs, float64(s.SoftIRQ)/total)
b += submit_cpu_percent("steal", unixTs, float64(s.Steal)/total)
f.Write([]byte(b))
}
func getSysTime() int64 {
sys, err := procinfo.ReadStat("/proc/stat")
if err != nil {
panic(err)
}
stat := sys.CPUStatAll
return int64(stat.User + stat.Nice + stat.System + stat.Idle + stat.IOWait)
}
// cpuStats reads /proc/stat to obtain CPU utilization statistics.
func cpuStats() linux.CPUStat {
stat, err := linux.ReadStat("/proc/stat")
if err != nil {
log.Fatalf("Unable to process /proc/stat: %s", err)
}
return stat.CPUStatAll
}
func (p *ProcStat) Run() error {
stat, err := linuxproc.ReadStat("/proc/stat")
if err != nil {
return err
}
p.Data = stat
return nil
}
// GetDeltaTotalJiffies returns the number of jiffies that have passed since it
// was last called. In that respect, it is side-effect-ful.
func GetDeltaTotalJiffies() (uint64, float64, error) {
stat, err := linuxproc.ReadStat(host.ProcStat)
if err != nil {
return 0, 0.0, err
}
var (
currentStat = stat.CPUStatAll
prevTotal = (previousStat.Idle + previousStat.IOWait + previousStat.User +
previousStat.Nice + previousStat.System + previousStat.IRQ +
previousStat.SoftIRQ + previousStat.Steal)
currentTotal = (currentStat.Idle + currentStat.IOWait + currentStat.User +
currentStat.Nice + currentStat.System + currentStat.IRQ +
currentStat.SoftIRQ + currentStat.Steal)
)
previousStat = currentStat
return currentTotal - prevTotal, float64(len(stat.CPUStats)) * 100., nil
}
// https://github.com/c9s/goprocinfo
func cpuStat() {
for {
//http://stackoverflow.com/questions/6807590/how-to-stop-a-goroutine
select {
case <-H.quit:
return
default:
}
stat, err := linuxproc.ReadStat("/proc/stat")
if err != nil {
return
}
for _, s := range stat.CPUStats {
total := s.User + s.System + s.Nice + s.Idle + s.IOWait + s.IRQ + s.SoftIRQ
diff_idle := float64(s.Idle - cpu_prev_idle[s.Id])
diff_total := float64(total - cpu_prev_total[s.Id])
usage := 100 * (diff_total - diff_idle) / diff_total
cpu_prev_total[s.Id] = total
cpu_prev_idle[s.Id] = s.Idle
// сглаживание колебаний
if len(usage_bufer) < 10 {
usage_bufer = append(usage_bufer, usage)
} else {
usage = 0
for _, c := range usage_bufer {
usage += c
}
usage_bufer = []float64{}
msg, _ := json.Marshal(&map[string]interface{}{"cpu": s.Id, "usage": strconv.FormatFloat(usage/10, 'f', 2, 64)})
H.broadcast <- []byte(msg)
}
}
time.Sleep(time.Millisecond * time.Duration(cpu_update))
}
}
func getStats() (idle, total uint64) {
stat, err := linuxproc.ReadStat("/proc/stat")
if err != nil {
log.Fatal("stat read fail")
}
for _, s := range stat.CPUStats {
// s.User
// s.Nice
// s.System
// s.Idle
// s.IOWait
val := strconv.FormatUint(s.System, 10)
// if err != nil {
// fmt.Println("Error: ", err)
// }
fmt.Printf(val)
}
return
}
return 0, fmt.Errorf("invalid format: %s", string(buf))
}
uptime, err := strconv.ParseFloat(fields[0], 64)
if err != nil {
return 0, err
}
return time.Duration(uptime) * time.Second, nil
}
var previousStat = linuxproc.CPUStat{}
// GetCPUUsagePercent returns the percent cpu usage and max (ie #cpus * 100)
var GetCPUUsagePercent = func() (float64, float64) {
stat, err := linuxproc.ReadStat(ProcStat)
if err != nil {
return 0.0, 0.0
}
// From http://stackoverflow.com/questions/23367857/accurate-calculation-of-cpu-usage-given-in-percentage-in-linux
var (
currentStat = stat.CPUStatAll
prevIdle = previousStat.Idle + previousStat.IOWait
idle = currentStat.Idle + currentStat.IOWait
prevNonIdle = (previousStat.User + previousStat.Nice + previousStat.System +
previousStat.IRQ + previousStat.SoftIRQ + previousStat.Steal)
nonIdle = (currentStat.User + currentStat.Nice + currentStat.System +
currentStat.IRQ + currentStat.SoftIRQ + currentStat.Steal)
prevTotal = prevIdle + prevNonIdle
total = idle + nonIdle
func (c *CPUTime) Store() {
c.last = c.actual
stat, _ := linuxproc.ReadStat("/proc/stat")
c.actual = stat.CPUStatAll
}
