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Adds cpu busy time and percentages

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This commit is contained in:
Josh Palay
2015-08-12 11:09:20 -07:00
committed by Cameron Sparr
parent ba1e4917d1
commit 1e742aec04
2 changed files with 176 additions and 17 deletions
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65
plugins/system/cpu.go
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@@ -4,13 +4,25 @@ import (
"fmt"
"github.com/influxdb/telegraf/plugins"
"github.com/influxdb/telegraf/plugins/system/ps/cpu"
)
type CPUStats struct {
ps PS
ps PS
lastStats []cpu.CPUTimesStat
PerCPU bool `toml:"percpu"`
TotalCPU bool `toml:"totalcpu"`
}
PerCPU bool `toml:"percpu"`
TotalCPU bool `toml:"totalcpu"`
func NewCPUStats(ps PS) *CPUStats {
times, _ := ps.CPUTimes()
stats := CPUStats{
ps: ps,
lastStats: times,
}
return &stats
}
func (_ *CPUStats) Description() string {
@@ -33,11 +45,14 @@ func (s *CPUStats) Gather(acc plugins.Accumulator) error {
return fmt.Errorf("error getting CPU info: %s", err)
}
for _, cts := range times {
for i, cts := range times {
tags := map[string]string{
"cpu": cts.CPU,
}
busy, total := busyAndTotalCpuTime(cts)
// Add total cpu numbers
add(acc, "user", cts.User, tags)
add(acc, "system", cts.System, tags)
add(acc, "idle", cts.Idle, tags)
@@ -49,13 +64,53 @@ func (s *CPUStats) Gather(acc plugins.Accumulator) error {
add(acc, "guest", cts.Guest, tags)
add(acc, "guestNice", cts.GuestNice, tags)
add(acc, "stolen", cts.Stolen, tags)
add(acc, "busy", busy, tags)
// Add in percentage
lastCts := s.lastStats[i]
lastBusy, lastTotal := busyAndTotalCpuTime(lastCts)
busyDelta := busy - lastBusy
totalDelta := total - lastTotal
if totalDelta < 0 {
return fmt.Errorf("Error: current total CPU time is less than previous total CPU time")
}
if totalDelta == 0 {
return nil
}
add(acc, "percentageUser", 100*(cts.User-lastCts.User)/totalDelta, tags)
add(acc, "percentageSystem", 100*(cts.System-lastCts.System)/totalDelta, tags)
add(acc, "percentageIdle", 100*(cts.Idle-lastCts.Idle)/totalDelta, tags)
add(acc, "percentageNice", 100*(cts.Nice-lastCts.Nice)/totalDelta, tags)
add(acc, "percentageIowait", 100*(cts.Iowait-lastCts.Iowait)/totalDelta, tags)
add(acc, "percentageIrq", 100*(cts.Irq-lastCts.Irq)/totalDelta, tags)
add(acc, "percentageSoftirq", 100*(cts.Softirq-lastCts.Softirq)/totalDelta, tags)
add(acc, "percentageSteal", 100*(cts.Steal-lastCts.Steal)/totalDelta, tags)
add(acc, "percentageGuest", 100*(cts.Guest-lastCts.Guest)/totalDelta, tags)
add(acc, "percentageGuestNice", 100*(cts.GuestNice-lastCts.GuestNice)/totalDelta, tags)
add(acc, "percentageStolen", 100*(cts.Stolen-lastCts.Stolen)/totalDelta, tags)
add(acc, "percentageBusy", 100*busyDelta/totalDelta, tags)
}
s.lastStats = times
return nil
}
func busyAndTotalCpuTime(t cpu.CPUTimesStat) (float64, float64) {
busy := t.User + t.System + t.Nice + t.Iowait + t.Irq + t.Softirq + t.Steal +
t.Guest + t.GuestNice + t.Stolen
return busy, busy + t.Idle
}
func init() {
plugins.Add("cpu", func() plugins.Plugin {
return &CPUStats{ps: &systemPS{}}
realPS := &systemPS{}
return NewCPUStats(realPS)
})
}