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client.go
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/
client.go
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package main
import (
"bytes"
"encoding/binary"
"encoding/gob"
"encoding/json"
"flag"
"fmt"
"log"
"os"
"os/signal"
"runtime/pprof"
"time"
"github.com/uber-common/cpustat/lib"
"github.com/uber/tchannel-go"
"github.com/uber/tchannel-go/raw"
)
func main() {
var fetchCount = flag.Int("c", 300, "number of samples to summarize")
var hostPort = flag.String("host", "127.0.0.1:1971", "hostport to fetch samples from")
var cpuprofile = flag.String("cpuprofile", "", "write cpu profile to file")
var memprofile = flag.String("memprofile", "", "write memory profile to this file")
flag.Parse()
if *cpuprofile != "" {
f, err := os.Create(*cpuprofile)
if err != nil {
log.Fatal(err)
}
if err = pprof.StartCPUProfile(f); err != nil {
log.Fatal(err)
}
}
sigChan := make(chan os.Signal, 1)
signal.Notify(sigChan, os.Interrupt)
go func() {
<-sigChan
if *cpuprofile != "" {
pprof.StopCPUProfile()
}
if *memprofile != "" {
f, err := os.Create(*memprofile)
if err != nil {
log.Fatal(err)
}
pprof.WriteHeapProfile(f)
f.Close()
}
os.Exit(0)
}()
ch, err := tchannel.NewChannel("cpustat", nil)
if err != nil {
log.Fatalf("NewChannel failed: %v", err)
}
ctx, cancel := tchannel.NewContext(5 * time.Second)
defer cancel()
sendCount := make([]byte, 4)
binary.LittleEndian.PutUint32(sendCount, uint32(*fetchCount))
_, arg3, _, err := raw.Call(ctx, ch, *hostPort, "cpustat", "readSamples", nil, sendCount)
if err != nil {
panic(err)
}
buf := bytes.NewBuffer(arg3)
dec := gob.NewDecoder(buf)
var when time.Time
err = dec.Decode(&when)
var infoMap cpustat.ProcInfoMap
err = dec.Decode(&infoMap)
var interval uint32
err = dec.Decode(&interval)
var recvCount uint32
err = dec.Decode(&recvCount)
procSum := newProcSum(interval, infoMap)
for i := uint32(0); i < recvCount; i++ {
var procList []cpustat.ProcSample
var sys cpustat.SystemStats
err = dec.Decode(&procList)
err = dec.Decode(&sys)
procSum.update(procList, &sys)
}
procSum.summarize()
if *cpuprofile != "" {
pprof.StopCPUProfile()
}
}
type procSummary struct {
infoMap cpustat.ProcInfoMap
procCur []cpustat.ProcSample
procPrev []cpustat.ProcSample
procSum cpustat.ProcSampleMap
procDelta cpustat.ProcSampleMap
procHist cpustat.ProcStatsHistMap
taskHist cpustat.TaskStatsHistMap
sysCur *cpustat.SystemStats
sysPrev *cpustat.SystemStats
sysSum *cpustat.SystemStats
sysDelta *cpustat.SystemStats
sysHist *cpustat.SystemStatsHist
Interval uint32
Samples uint32
}
func newProcSum(interval uint32, infoMap cpustat.ProcInfoMap) *procSummary {
ret := procSummary{}
ret.infoMap = infoMap
ret.procSum = make(cpustat.ProcSampleMap)
ret.procDelta = make(cpustat.ProcSampleMap)
ret.procHist = make(cpustat.ProcStatsHistMap)
ret.taskHist = make(cpustat.TaskStatsHistMap)
ret.sysCur = &cpustat.SystemStats{}
ret.sysPrev = &cpustat.SystemStats{}
ret.sysSum = &cpustat.SystemStats{}
ret.sysDelta = &cpustat.SystemStats{}
ret.sysHist = cpustat.NewSysStatsHist()
ret.Interval = interval
return &ret
}
func (p *procSummary) update(procSamples []cpustat.ProcSample, sys *cpustat.SystemStats) {
if p.Samples == 0 {
p.procPrev = procSamples
p.sysPrev = sys
} else {
p.procCur = procSamples
cur := cpustat.ProcSampleList{p.procCur, uint32(len(p.procCur))}
prev := cpustat.ProcSampleList{p.procPrev, uint32(len(p.procPrev))}
cpustat.ProcStatsRecord(p.Interval, cur, prev, p.procSum, p.procDelta)
cpustat.TaskStatsRecord(p.Interval, cur, prev, p.procSum, p.procDelta)
cpustat.UpdateProcStatsHist(p.procHist, p.procDelta)
cpustat.UpdateTaskStatsHist(p.taskHist, p.procDelta)
p.procPrev = p.procCur
p.sysCur = sys
p.sysDelta = cpustat.SystemStatsRecord(p.Interval, p.sysCur, p.sysPrev, p.sysSum)
cpustat.UpdateSysStatsHist(p.sysHist, p.sysDelta)
p.sysPrev = p.sysCur
}
p.Samples++
}
type sysJSON struct {
Samples uint64
UsrMin float64
UsrMax float64
UsrAvg float64
UsrP95 float64
NiceMin float64
NiceMax float64
NiceAvg float64
NiceP95 float64
SysMin float64
SysMax float64
SysAvg float64
SysP95 float64
IdleMin float64
IdleMax float64
IdleAvg float64
IdleP95 float64
IowaitMin float64
IowaitMax float64
IowaitAvg float64
IowaitP95 float64
ProcsTotalMin float64
ProcsTotalMax float64
ProcsTotalAvg float64
ProcsTotalP95 float64
ProcsRunningMin float64
ProcsRunningMax float64
ProcsRunningAvg float64
ProcsRunningP95 float64
ProcsBlockedMin float64
ProcsBlockedMax float64
ProcsBlockedAvg float64
ProcsBlockedP95 float64
}
type procJSONEntry struct {
Samples uint64
Pid uint64
Ppid uint64
Nice int64
Comm string
Cmdline []string
Numthreads uint64
RSS uint64
UsrMin float64
UsrMax float64
UsrAvg float64
UsrP95 float64
SysMin float64
SysMax float64
SysAvg float64
SysP95 float64
CUSMin float64
CUSMax float64
CUSAvg float64
CUSP95 float64
RunQAvg float64
RunQCount uint64
IOWAvg float64
IOWCount uint64
SwapAvg float64
SwapCount uint64
Vcsw uint64
Ivcsw uint64
}
type sumJSON struct {
Sys sysJSON
Proc []procJSONEntry
}
func (p *procSummary) summarize() {
out := sumJSON{}
out.Sys.Samples = uint64(p.sysHist.Usr.TotalCount())
out.Sys.UsrMin = float64(p.sysHist.Usr.Min())
out.Sys.UsrMax = float64(p.sysHist.Usr.Max())
out.Sys.UsrAvg = p.sysHist.Usr.Mean()
out.Sys.UsrP95 = float64(p.sysHist.Usr.ValueAtQuantile(95))
out.Sys.NiceMin = float64(p.sysHist.Nice.Min())
out.Sys.NiceMax = float64(p.sysHist.Nice.Max())
out.Sys.NiceAvg = p.sysHist.Nice.Mean()
out.Sys.NiceP95 = float64(p.sysHist.Nice.ValueAtQuantile(95))
out.Sys.SysMin = float64(p.sysHist.Sys.Min())
out.Sys.SysMax = float64(p.sysHist.Sys.Max())
out.Sys.SysAvg = p.sysHist.Sys.Mean()
out.Sys.SysP95 = float64(p.sysHist.Sys.ValueAtQuantile(95))
out.Sys.IdleMin = float64(p.sysHist.Idle.Min())
out.Sys.IdleMax = float64(p.sysHist.Idle.Max())
out.Sys.IdleAvg = p.sysHist.Idle.Mean()
out.Sys.IdleP95 = float64(p.sysHist.Idle.ValueAtQuantile(95))
out.Sys.IowaitMin = float64(p.sysHist.Iowait.Min())
out.Sys.IowaitMax = float64(p.sysHist.Iowait.Max())
out.Sys.IowaitAvg = p.sysHist.Iowait.Mean()
out.Sys.IowaitP95 = float64(p.sysHist.Iowait.ValueAtQuantile(95))
out.Sys.ProcsTotalMin = float64(p.sysHist.ProcsTotal.Min())
out.Sys.ProcsTotalMax = float64(p.sysHist.ProcsTotal.Max())
out.Sys.ProcsTotalAvg = p.sysHist.ProcsTotal.Mean()
out.Sys.ProcsTotalP95 = float64(p.sysHist.ProcsTotal.ValueAtQuantile(95))
out.Sys.ProcsRunningMin = float64(p.sysHist.ProcsRunning.Min())
out.Sys.ProcsRunningMax = float64(p.sysHist.ProcsRunning.Max())
out.Sys.ProcsRunningAvg = p.sysHist.ProcsRunning.Mean()
out.Sys.ProcsRunningP95 = float64(p.sysHist.ProcsRunning.ValueAtQuantile(95))
out.Sys.ProcsBlockedMin = float64(p.sysHist.ProcsBlocked.Min())
out.Sys.ProcsBlockedMax = float64(p.sysHist.ProcsBlocked.Max())
out.Sys.ProcsBlockedAvg = p.sysHist.ProcsBlocked.Mean()
out.Sys.ProcsBlockedP95 = float64(p.sysHist.ProcsBlocked.ValueAtQuantile(95))
out.Proc = make([]procJSONEntry, 0, len(p.procSum))
for pid, sum := range p.procSum {
info, ok := p.infoMap[pid]
if ok == false {
panic(fmt.Sprint("missing procInfo for", pid))
}
hist, ok := p.procHist[pid]
if ok == false {
panic(fmt.Sprint("missing procHist for", pid))
}
entry := procJSONEntry{}
entry.Pid = info.Pid
entry.Comm = info.Comm
entry.Ppid = info.Ppid
entry.Nice = info.Nice
entry.Cmdline = info.Cmdline
entry.RSS = sum.Proc.Rss
entry.Numthreads = sum.Proc.Numthreads
entry.Samples = uint64(hist.Ustime.TotalCount())
entry.UsrMin = float64(hist.Utime.Min())
entry.UsrMax = float64(hist.Utime.Max())
entry.UsrAvg = hist.Utime.Mean()
entry.UsrP95 = float64(hist.Utime.ValueAtQuantile(95))
entry.SysMin = float64(hist.Stime.Min())
entry.SysMax = float64(hist.Stime.Max())
entry.SysAvg = hist.Stime.Mean()
entry.SysP95 = float64(hist.Stime.ValueAtQuantile(95))
entry.CUSMin = float64(hist.Ustime.Min())
entry.CUSMax = float64(hist.Ustime.Max())
entry.CUSAvg = hist.Ustime.Mean()
entry.CUSP95 = float64(hist.Ustime.ValueAtQuantile(95))
entry.RunQAvg = float64(sum.Task.Cpudelaytotal)
entry.RunQCount = sum.Task.Cpudelaycount
entry.IOWAvg = float64(sum.Task.Blkiodelaytotal)
entry.IOWCount = sum.Task.Blkiodelaycount
entry.SwapAvg = float64(sum.Task.Swapindelaytotal)
entry.SwapCount = sum.Task.Swapindelaycount
out.Proc = append(out.Proc, entry)
}
b, err := json.Marshal(out)
if err != nil {
panic(err)
}
fmt.Println(string(b))
}
func summarizeSys(allSamples []cpustat.SystemStats) {
sum := cpustat.SystemStats{}
hist := cpustat.NewSysStatsHist()
for pos := len(allSamples) - 1; pos >= 1; pos-- {
delta := cpustat.SystemStatsRecord(200, &allSamples[pos-1], &allSamples[pos], &sum)
cpustat.UpdateSysStatsHist(hist, delta)
}
fmt.Println("Idle: ", hist.Idle.Min(), hist.Idle.Max(), hist.Idle.Mean(),
hist.Idle.ValueAtQuantile(50), hist.Idle.ValueAtQuantile(90), hist.Idle.ValueAtQuantile(99))
fmt.Println("Usr: ", hist.Usr.Min(), hist.Usr.Max(), hist.Usr.Mean(),
hist.Usr.ValueAtQuantile(50), hist.Usr.ValueAtQuantile(90), hist.Usr.ValueAtQuantile(99))
fmt.Println("Sys: ", hist.Sys.Min(), hist.Sys.Max(), hist.Sys.Mean(),
hist.Sys.ValueAtQuantile(50), hist.Sys.ValueAtQuantile(90), hist.Sys.ValueAtQuantile(99))
fmt.Println("Nice: ", hist.Nice.Min(), hist.Nice.Max(), hist.Nice.Mean(),
hist.Nice.ValueAtQuantile(50), hist.Nice.ValueAtQuantile(90), hist.Nice.ValueAtQuantile(99))
fmt.Println("IOWait: ", hist.Iowait.Min(), hist.Iowait.Max(), hist.Iowait.Mean(),
hist.Iowait.ValueAtQuantile(50), hist.Iowait.ValueAtQuantile(90), hist.Iowait.ValueAtQuantile(99))
}
func fetchSamples(hostPort string, count int) {
ch, err := tchannel.NewChannel("cpustat", nil)
if err != nil {
log.Fatalf("NewChannel failed: %v", err)
}
ctx, cancel := tchannel.NewContext(100 * time.Millisecond)
defer cancel()
sendCount := make([]byte, 4)
binary.LittleEndian.PutUint32(sendCount, 10)
_, arg3, _, err := raw.Call(ctx, ch, hostPort, "cpustat", "readSamples", nil, sendCount)
if err != nil {
panic(err)
}
buf := bytes.NewBuffer(arg3)
dec := gob.NewDecoder(buf)
var when time.Time
err = dec.Decode(&when)
var infoMap cpustat.ProcInfoMap
err = dec.Decode(&infoMap)
fmt.Println("pidlist", infoMap, err)
var recvCount uint32
err = dec.Decode(&recvCount)
for i := uint32(0); i < recvCount; i++ {
var procs cpustat.ProcStatsMap
var tasks cpustat.TaskStatsMap
var sys cpustat.SystemStats
err = dec.Decode(&procs)
err = dec.Decode(&tasks)
err = dec.Decode(&sys)
}
}