func StartReadText() {
hello := new(Job)
hello.text = "hello"
hello.i = 0
hello.max = 3
world := new(Job)
world.text = "world"
world.i = 0
world.max = 5
go ReadText(hello)
go ReadText(world)
cpus := runtime.GOMAXPROCS(0)
fmt.Println(runtime.GOOS, runtime.NumCPU(), runtime.NumCgoCall(), runtime.NumGoroutine(), "list cpu number:", cpus)
max := 8
for i := 1; i < max; i++ {
go showNumber(i)
}
//This is because there’s no guarantee as to how
//many goroutines, if any, will complete before the end of the main() function
runtime.Gosched()
fmt.Println("exits!")
}
// Prints a summary of go:ngine's *Stats* performance counters when the parent example app exits.
func PrintPostLoopSummary() {
printStatSummary := func(name string, timing *ng.TimingStats) {
fmt.Printf("%v\t\tAvg=%8.3fms\tMax=%8.3fms\n", name, timing.Average()*1000, timing.Max()*1000)
}
fmt.Printf("Average FPS:\t\t%v (total %v over %v)\n", ng.Stats.AverageFps(), ng.Stats.TotalFrames(), time.Duration(int64(ng.Loop.Time()*1000*1000*1000)))
printStatSummary("Full Loop Iteration", &ng.Stats.Frame)
printStatSummary("Frame On.EverySec", &ng.Stats.FrameOnSec)
printStatSummary("Frame On.AppThread", &ng.Stats.FrameAppThread)
printStatSummary("Frame On.WinThread", &ng.Stats.FrameWinThread)
printStatSummary("Frame Prep Thread", &ng.Stats.FramePrepThread)
printStatSummary("Frame Thread Sync", &ng.Stats.FrameThreadSync)
printStatSummary("Frame Render (CPU)", &ng.Stats.FrameRenderCpu)
printStatSummary("Frame Render (GPU)", &ng.Stats.FrameRenderGpu)
printStatSummary("Frame Render Both", &ng.Stats.FrameRenderBoth)
if s := "GC (max. 1x/sec)"; ng.Options.Loop.GcEvery.Frame || ng.Options.Loop.GcEvery.Sec {
if ng.Options.Loop.GcEvery.Frame {
s = "GC (max 1x/frame)"
}
printStatSummary(s, &ng.Stats.Gc)
if !ng.Options.Loop.GcEvery.Frame {
fmt.Printf("Averaged GC/frame cost:\t%1.3fms\n", (ng.Stats.Gc.Average()/ng.Stats.AverageFps())*1000)
}
}
fmt.Printf("Shaders: compiled %v GLSL shader programs over time, which took %v in total.\n", ng.Stats.Programs.NumProgsCompiled, time.Duration(ng.Stats.Programs.TotalTimeCost))
cgoPerFrame, numTotalFrames := int64(0), ng.Stats.TotalFrames()
if numTotalFrames != 0 {
cgoPerFrame = runtime.NumCgoCall() / int64(ng.Stats.TotalFrames())
}
fmt.Printf("CGO calls: pre-loop init %v, loop %v (avg. %v/frame)\n\n", numCgo.preLoop, numCgo.postLoop-numCgo.preLoop, cgoPerFrame)
}
func (gui *Gui) setStatsPane() {
var memStats runtime.MemStats
runtime.ReadMemStats(&memStats)
statsPane := gui.getObjectByName("statsPane")
statsPane.Set("text", fmt.Sprintf(`###### Mist %s (%s) #######
eth %d (p2p = %d)
CPU: # %d
Goroutines: # %d
CGoCalls: # %d
Alloc: %d
Heap Alloc: %d
CGNext: %x
NumGC: %d
`, Version, runtime.Version(),
eth.ProtocolVersion, 2,
runtime.NumCPU, runtime.NumGoroutine(), runtime.NumCgoCall(),
memStats.Alloc, memStats.HeapAlloc,
memStats.NextGC, memStats.NumGC,
))
}
func (metrica *noCgoCallsMetrica) GetValue() (float64, error) {
currentValue := runtime.NumCgoCall()
value := float64(currentValue - metrica.lastValue)
metrica.lastValue = currentValue
return value, nil
}
func ShowAdmin(res http.ResponseWriter, req *http.Request, base *BaseController) {
// TODO: add total transactions
male_players := models.GetMalePlayers()
female_players := models.GetFemalePlayers()
m := &runtime.MemStats{}
runtime.ReadMemStats(m)
online_records, err := models.GetOnlineRecords()
if err != nil {
http.Error(res, "Error while getting online records: "+err.Error(), 500)
return
}
views.Parser.ExecuteTemplate(res, "admin.html", &AdminOverviewResponse{
male_players,
female_players,
models.GetSorcererPlayers(),
models.GetDruidPlayers(),
models.GetPaladinPlayers(),
models.GetKnightPlayers(),
models.GetTotalAccounts(),
models.GetTotalPlayers(),
m,
runtime.NumCPU(),
runtime.NumGoroutine(),
runtime.NumCgoCall(),
runtime.Version(),
online_records,
})
}
func main() {
log.Println("Version=", runtime.Version())
log.Println("GOMAXPROCS=", runtime.GOMAXPROCS(0))
log.Println("NumCPUs=", runtime.NumCPU())
log.Println("NumCgoCall=", runtime.NumCgoCall())
log.Println("NumGoroutines=", runtime.NumGoroutine())
debug.PrintStack()
}
// SampleEnvironment queries the runtime system for various interesting metrics,
// storing the resulting values in the set of metric gauges maintained by
// RuntimeStatSampler. This makes runtime statistics more convenient for
// consumption by the time series and status systems.
//
// This method should be called periodically by a higher level system in order
// to keep runtime statistics current.
func (rsr *RuntimeStatSampler) SampleEnvironment() {
// Record memory and call stats from the runtime package.
// TODO(mrtracy): memory statistics will not include usage from RocksDB.
// Determine an appropriate way to compute total memory usage.
numCgoCall := runtime.NumCgoCall()
numGoroutine := runtime.NumGoroutine()
// It might be useful to call ReadMemStats() more often, but it stops the
// world while collecting stats so shouldn't be called too often.
ms := runtime.MemStats{}
runtime.ReadMemStats(&ms)
// Record CPU statistics using syscall package.
ru := syscall.Rusage{}
if err := syscall.Getrusage(syscall.RUSAGE_SELF, &ru); err != nil {
log.Errorf("Getrusage failed: %v", err)
}
// Time statistics can be compared to the total elapsed time to create a
// useful percentage of total CPU usage, which would be somewhat less accurate
// if calculated later using downsampled time series data.
now := rsr.clock.PhysicalNow()
dur := float64(now - rsr.lastNow)
newUtime := ru.Utime.Nano()
newStime := ru.Stime.Nano()
uPerc := float64(newUtime-rsr.lastUtime) / dur
sPerc := float64(newStime-rsr.lastStime) / dur
pausePerc := float64(ms.PauseTotalNs-rsr.lastPauseTime) / dur
rsr.lastNow = now
rsr.lastUtime = newUtime
rsr.lastStime = newStime
rsr.lastPauseTime = ms.PauseTotalNs
// Log summary of statistics to console, if requested.
activeMiB := float64(ms.Alloc) / (1 << 20)
cgoRate := float64((numCgoCall-rsr.lastCgoCall)*int64(time.Second)) / dur
log.Infof("runtime stats: %d goroutines, %.2fMiB active, %.2fcgo/sec, %.2f/%.2f %%(u/s)time, %.2f %%gc (%dx)",
numGoroutine, activeMiB, cgoRate, uPerc, sPerc, pausePerc, ms.NumGC-rsr.lastNumGC)
if log.V(2) {
log.Infof("memstats: %+v", ms)
}
if logOSStats != nil {
logOSStats()
}
rsr.lastCgoCall = numCgoCall
rsr.lastNumGC = ms.NumGC
rsr.cgoCalls.Update(numCgoCall)
rsr.goroutines.Update(int64(numGoroutine))
rsr.allocBytes.Update(int64(ms.Alloc))
rsr.gcCount.Update(int64(ms.NumGC))
rsr.gcPauseNS.Update(int64(ms.PauseTotalNs))
rsr.gcPausePercent.Update(pausePerc)
rsr.cpuUserNS.Update(newUtime)
rsr.cpuUserPercent.Update(uPerc)
rsr.cpuSysNS.Update(newStime)
rsr.cpuSysPercent.Update(sPerc)
}
// capture does a one time collection of DeferStats
func (c *Client) capture() {
var mem runtime.MemStats
var gc debug.GCStats
mems := ""
if c.GrabMem {
runtime.ReadMemStats(&mem)
mems = strconv.FormatUint(mem.Alloc, 10)
}
gcs := ""
if c.GrabGC {
debug.ReadGCStats(&gc)
gcs = strconv.FormatInt(gc.NumGC, 10)
}
grs := ""
if c.GrabGR {
grs = strconv.Itoa(runtime.NumGoroutine())
}
cgos := ""
if c.GrabCgo {
cgos = strconv.FormatInt(runtime.NumCgoCall(), 10)
}
fds := ""
if c.GrabFd {
fds = strconv.Itoa(openFileCnt())
}
ds := DeferStats{
Mem: mems,
GoRoutines: grs,
Cgos: cgos,
Fds: fds,
HTTPs: curlist.List(),
DBs: Querylist.List(),
GC: gcs,
}
// FIXME
// empty our https/dbs
curlist.Reset()
Querylist.Reset()
go func() {
b, err := json.Marshal(ds)
if err != nil {
log.Println(err)
}
c.BaseClient.Postit(b, c.statsUrl)
}()
}
// Status will return the current status of this system
func (ctx *BroadcastContext) Status() (*BroadcastServerStatus, error) {
status := new(BroadcastServerStatus)
status.NumGoroutines = runtime.NumGoroutine()
status.NumCpu = runtime.NumCPU()
status.NumCgoCall = runtime.NumCgoCall()
status.NumClients = ctx.ClientSize
status.Memory = new(runtime.MemStats)
runtime.ReadMemStats(status.Memory)
return status, nil
}
// GetTimeSeriesData returns a slice of TimeSeriesData updates based on current
// runtime statistics.
//
// Calling this method will query various system packages for runtime statistics
// and convert the information to time series data. This is currently done in
// one method because it is convenient; however, in the future querying and
// recording can be easily separated, similar to the way that NodeStatus is
// separated into a monitor and a recorder.
func (rsr *RuntimeStatRecorder) GetTimeSeriesData() []ts.TimeSeriesData {
data := make([]ts.TimeSeriesData, 0, rsr.lastDataCount)
// Record memory and call stats from the runtime package.
// TODO(mrtracy): memory statistics will not include usage from RocksDB.
// Determine an appropriate way to compute total memory usage.
numCgoCall := runtime.NumCgoCall()
numGoroutine := runtime.NumGoroutine()
ms := runtime.MemStats{}
runtime.ReadMemStats(&ms)
// Record CPU statistics using syscall package.
ru := syscall.Rusage{}
if err := syscall.Getrusage(syscall.RUSAGE_SELF, &ru); err != nil {
log.Errorf("Getrusage failed: %v", err)
}
// Time statistics can be compared to the total elapsed time to create a
// useful percentage of total CPU usage, which would be somewhat less accurate
// if calculated later using downsampled time series data.
now := rsr.clock.PhysicalNow()
dur := float64(now - rsr.lastNow)
newUtime := ru.Utime.Nano()
newStime := ru.Stime.Nano()
uPerc := float64(newUtime-rsr.lastUtime) / dur
sPerc := float64(newStime-rsr.lastStime) / dur
pausePerc := float64(ms.PauseTotalNs-rsr.lastPauseTime) / dur
rsr.lastNow = now
rsr.lastUtime = newUtime
rsr.lastStime = newStime
rsr.lastPauseTime = ms.PauseTotalNs
// Log summary of statistics to console, if requested.
if log.V(1) {
activeMiB := float64(ms.Alloc) / (1 << 20)
cgoRate := float64((numCgoCall-rsr.lastCgoCall)*int64(time.Second)) / dur
log.Infof("runtime stats: %d goroutines, %.2fMiB active, %.2fcgo/sec, %.2f/%.2f %%(u/s)time, %.2f %%gc (%dx)",
numGoroutine, activeMiB, cgoRate, uPerc, sPerc, pausePerc, ms.NumGC-rsr.lastNumGC)
rsr.lastCgoCall = numCgoCall
rsr.lastNumGC = ms.NumGC
}
data = append(data, rsr.record(now, "cgocalls", float64(numCgoCall)))
data = append(data, rsr.record(now, "goroutines", float64(numGoroutine)))
data = append(data, rsr.record(now, "allocbytes", float64(ms.Alloc)))
data = append(data, rsr.record(now, "gc.count", float64(ms.NumGC)))
data = append(data, rsr.record(now, "gc.pause.ns", float64(ms.PauseTotalNs)))
data = append(data, rsr.record(now, "gc.pause.percent", pausePerc))
data = append(data, rsr.record(now, "cpu.user.ns", float64(newUtime)))
data = append(data, rsr.record(now, "cpu.user.percent", uPerc))
data = append(data, rsr.record(now, "cpu.sys.ns", float64(newStime)))
data = append(data, rsr.record(now, "cpu.sys.percent", sPerc))
rsr.lastDataCount = len(data)
return data
}
// a few simple stats from go runtime, in your app, if you want these
// add them as a metrics function
//
// func init() {
// metrics.AddMetricsFunction(metrics.GoRuntimeMetrics)
// }
func GoRuntimeMetrics(snap *Snapshot) {
snap.Ints["go_cgocall.ct"] = uint64(runtime.NumCgoCall())
snap.Ints["go_numgoroutine.ct"] = uint64(runtime.NumGoroutine())
// http://weekly.golang.org/pkg/runtime/#MemStats
runtime.ReadMemStats(&rtMem)
snap.Ints["go_memalloc.avg"] = rtMem.Alloc / 1048576
snap.Ints["go_memtotalloc.avg"] = rtMem.TotalAlloc / 1048576
snap.Ints["go_memsys.avg"] = rtMem.Sys / 1048576
}
func SysInfo(job *Job) ([]byte, error) {
return json.Marshal(&systemInfo{
GOOS: runtime.GOOS,
GOARCH: runtime.GOARCH,
GOROOT: runtime.GOROOT(),
Version: runtime.Version(),
NumCPU: runtime.NumCPU(),
NumGoroutine: runtime.NumGoroutine(),
NumCgoCall: runtime.NumCgoCall(),
})
}
func main() {
go func() {
fmt.Println("before")
runtime.Goexit()
fmt.Println("after")
}()
fmt.Println(runtime.GOROOT(), runtime.GOMAXPROCS(0), runtime.NumCPU(), runtime.NumCgoCall())
<-time.After(time.Second * 2)
}
func RESTGetRuntimeStats(w http.ResponseWriter, r *http.Request) {
MustEncode(w, map[string]interface{}{
"currTime": time.Now(),
"startTime": StartTime,
"go": map[string]interface{}{
"numGoroutine": runtime.NumGoroutine(),
"numCgoCall": runtime.NumCgoCall(),
"memProfileRate": runtime.MemProfileRate,
},
})
}
// golang stats
func GoStats() []byte {
res := map[string]interface{}{}
res["compiler"] = runtime.Compiler
res["arch"] = runtime.GOARCH
res["os"] = runtime.GOOS
res["max_procs"] = runtime.GOMAXPROCS(-1)
res["root"] = runtime.GOROOT()
res["cgo_call"] = runtime.NumCgoCall()
res["goroutine_num"] = runtime.NumGoroutine()
res["version"] = runtime.Version()
return jsonRes(res)
}
func cliDebug(c *minicli.Command) *minicli.Response {
return &minicli.Response{
Host: hostname,
Header: []string{"Go version", "Goroutines", "CGO calls"},
Tabular: [][]string{
[]string{
runtime.Version(),
strconv.Itoa(runtime.NumGoroutine()),
strconv.FormatInt(runtime.NumCgoCall(), 10),
},
},
}
}
func (s *runtimeMetrics) Metrics() map[string]interface{} {
runtime.ReadMemStats(&s.memStats)
return map[string]interface{}{
"Mallocs": CounterValue(s.memStats.Mallocs),
"Frees": CounterValue(s.memStats.Frees),
"heap/HeapAlloc": GaugeValue(s.memStats.HeapAlloc),
"heap/HeapObjects": GaugeValue(s.memStats.HeapObjects),
"gc/NumGC": CounterValue(s.memStats.NumGC),
"gc/PauseTotalNs": CounterValue(s.memStats.PauseTotalNs),
"Goroutines": GaugeValue(runtime.NumGoroutine()),
"CgoCalls": CounterValue(runtime.NumCgoCall()),
}
}
func main() {
// var goos string = os.Getenv("GOOS")
var goos = runtime.GOOS
fmt.Printf("The operating system is: %s\n", goos)
path := os.Getenv("PATH")
fmt.Printf("Path is %s\n", path)
fmt.Println("runtime.Compiler is", runtime.Compiler)
fmt.Println("runtime.GOARCH is", runtime.GOARCH)
fmt.Println("runtime.NumCPU() is", runtime.NumCPU())
fmt.Println("runtime.NumGgoCall() is", runtime.NumCgoCall())
fmt.Println("runtime.NumGoroutine() is", runtime.NumGoroutine())
fmt.Println("runtime.Version() is", runtime.Version())
}
func (i *info) dumpServer(buf *bytes.Buffer) {
buf.WriteString("# Server\r\n")
i.dumpPairs(buf, infoPair{"os", i.Server.OS},
infoPair{"process_id", i.Server.ProceessId},
infoPair{"addr", i.app.cfg.Addr},
infoPair{"http_addr", i.app.cfg.HttpAddr},
infoPair{"readonly", i.app.cfg.Readonly},
infoPair{"goroutine_num", runtime.NumGoroutine()},
infoPair{"cgo_call_num", runtime.NumCgoCall()},
infoPair{"resp_client_num", i.app.respClientNum()},
)
}
func GetInfo() interface{} {
d := time.Now().Sub(started)
return Info{
HasDbXML: has_dbxml,
QueueLen: len(chWork),
QueueCap: cap(chWork),
NumCPU: runtime.NumCPU(),
NumCgoCall: runtime.NumCgoCall(),
NumGoroutine: runtime.NumGoroutine(),
Uptime: d,
UptimeString: d.String(),
Version: runtime.Version(),
}
}
func (c *Collector) outputStats() {
if c.EnableCPU {
// Goroutines
c.gaugeFunc("cpu.goroutines", uint64(runtime.NumGoroutine()))
// CGo calls
c.gaugeFunc("cpu.cgo_calls", uint64(runtime.NumCgoCall()))
}
if c.EnableMem {
m := &runtime.MemStats{}
runtime.ReadMemStats(m)
// General
c.gaugeFunc("mem.alloc", m.Alloc)
c.gaugeFunc("mem.total", m.TotalAlloc)
c.gaugeFunc("mem.sys", m.Sys)
c.gaugeFunc("mem.lookups", m.Lookups)
c.gaugeFunc("mem.malloc", m.Mallocs)
c.gaugeFunc("mem.frees", m.Frees)
// Heap
c.gaugeFunc("mem.heap.alloc", m.HeapAlloc)
c.gaugeFunc("mem.heap.sys", m.HeapSys)
c.gaugeFunc("mem.heap.idle", m.HeapIdle)
c.gaugeFunc("mem.heap.inuse", m.HeapInuse)
c.gaugeFunc("mem.heap.released", m.HeapReleased)
c.gaugeFunc("mem.heap.objects", m.HeapObjects)
// Stack
c.gaugeFunc("mem.stack.inuse", m.StackInuse)
c.gaugeFunc("mem.stack.sys", m.StackSys)
c.gaugeFunc("mem.stack.mspan_inuse", m.MSpanInuse)
c.gaugeFunc("mem.stack.mspan_sys", m.MSpanSys)
c.gaugeFunc("mem.stack.mcache_inuse", m.MCacheInuse)
c.gaugeFunc("mem.stack.mcache_sys", m.MCacheSys)
c.gaugeFunc("mem.othersys", m.OtherSys)
if c.EnableGC {
// GC
c.gaugeFunc("mem.gc.sys", m.GCSys)
c.gaugeFunc("mem.gc.next", m.NextGC)
c.gaugeFunc("mem.gc.last", m.LastGC)
c.gaugeFunc("mem.gc.pause_total", m.PauseTotalNs)
c.gaugeFunc("mem.gc.pause", m.PauseNs[(m.NumGC+255)%256])
c.gaugeFunc("mem.gc.count", uint64(m.NumGC))
}
}
}
func init() {
start := time.Now()
Publish("runtime", map[string]interface{}{
"cgocalls": Func(func() interface{} { return runtime.NumCgoCall() }),
"goroutines": Func(func() interface{} { return runtime.NumGoroutine() }),
"version": runtime.Version(),
"memstats": Func(func() interface{} {
var ms runtime.MemStats
runtime.ReadMemStats(&ms)
return &ms
}),
})
Publish("uptimeSeconds", Func(func() interface{} { return int(time.Now().Sub(start) / time.Second) }))
Publish("cmdline", &os.Args)
}
// Capture new values for the Go runtime statistics exported in
// runtime.MemStats. This is designed to be called in a background
// goroutine. Giving a registry which has not been given to
// RegisterRuntimeMemStats will panic.
func CaptureRuntimeMemStatsOnce(r Registry) {
runtime.ReadMemStats(&memStats)
r.Get("runtime.MemStats.Alloc").(Gauge).Update(int64(memStats.Alloc))
r.Get("runtime.MemStats.TotalAlloc").(Gauge).Update(int64(memStats.TotalAlloc))
r.Get("runtime.MemStats.Sys").(Gauge).Update(int64(memStats.Sys))
r.Get("runtime.MemStats.Lookups").(Gauge).Update(int64(memStats.Lookups))
r.Get("runtime.MemStats.Mallocs").(Gauge).Update(int64(memStats.Mallocs))
r.Get("runtime.MemStats.Frees").(Gauge).Update(int64(memStats.Frees))
r.Get("runtime.MemStats.HeapAlloc").(Gauge).Update(int64(memStats.HeapAlloc))
r.Get("runtime.MemStats.HeapSys").(Gauge).Update(int64(memStats.HeapSys))
r.Get("runtime.MemStats.HeapIdle").(Gauge).Update(int64(memStats.HeapIdle))
r.Get("runtime.MemStats.HeapInuse").(Gauge).Update(int64(memStats.HeapInuse))
r.Get("runtime.MemStats.HeapReleased").(Gauge).Update(int64(memStats.HeapReleased))
r.Get("runtime.MemStats.HeapObjects").(Gauge).Update(int64(memStats.HeapObjects))
r.Get("runtime.MemStats.StackInuse").(Gauge).Update(int64(memStats.StackInuse))
r.Get("runtime.MemStats.StackSys").(Gauge).Update(int64(memStats.StackSys))
r.Get("runtime.MemStats.MSpanInuse").(Gauge).Update(int64(memStats.MSpanInuse))
r.Get("runtime.MemStats.MSpanSys").(Gauge).Update(int64(memStats.MSpanSys))
r.Get("runtime.MemStats.MCacheInuse").(Gauge).Update(int64(memStats.MCacheInuse))
r.Get("runtime.MemStats.MCacheSys").(Gauge).Update(int64(memStats.MCacheSys))
r.Get("runtime.MemStats.BuckHashSys").(Gauge).Update(int64(memStats.BuckHashSys))
r.Get("runtime.MemStats.NextGC").(Gauge).Update(int64(memStats.NextGC))
r.Get("runtime.MemStats.LastGC").(Gauge).Update(int64(memStats.LastGC))
r.Get("runtime.MemStats.PauseTotalNs").(Gauge).Update(int64(memStats.PauseTotalNs))
// <https://code.google.com/p/go/source/browse/src/pkg/runtime/mgc0.c>
for i := uint32(1); i <= memStats.NumGC-numGC; i++ {
r.Get("runtime.MemStats.PauseNs").(Histogram).Update(int64(memStats.PauseNs[(memStats.NumGC%256-i)%256]))
}
r.Get("runtime.MemStats.NumGC").(Gauge).Update(int64(memStats.NumGC))
if memStats.EnableGC {
r.Get("runtime.MemStats.EnableGC").(Gauge).Update(1)
} else {
r.Get("runtime.MemStats.EnableGC").(Gauge).Update(0)
}
if memStats.EnableGC {
r.Get("runtime.MemStats.DebugGC").(Gauge).Update(1)
} else {
r.Get("runtime.MemStats.DebugGC").(Gauge).Update(0)
}
r.Get("runtime.NumCgoCall").(Gauge).Update(int64(runtime.NumCgoCall()))
r.Get("runtime.NumGoroutine").(Gauge).Update(int64(runtime.NumGoroutine()))
}
// Main entry point
func main() {
// Set defaults for the server configuration
Conf = &goserv.BaseConfiguration{
BindAddress: "0.0.0.0",
BindPort: 80,
ReadTimeout: 10 * time.Second,
WriteTimeout: 10 * time.Second,
MaxHeaderBytes: 1 << 20,
LogLevel: "info",
}
// Create a function that returns a struct for use with FuncHandler
GetMemStats := func() interface{} {
ms := runtime.MemStats{}
runtime.ReadMemStats(&ms)
return ms
}
// Bind it
http.HandleFunc("/status/memory", goserv.FuncHandler(GetMemStats, true))
// Create a function that returns an interface for use with FuncHandler
SysStats := func() interface{} {
return map[string]interface{}{
"CPUCount": runtime.NumCPU(),
"GoroutineCount": runtime.NumGoroutine(),
"CGoCallCount": runtime.NumCgoCall(),
"GoVersion": runtime.Version(),
}
}
// Bind it and log
http.HandleFunc("/status/sys", goserv.FuncHandler(SysStats, true))
// Bind a struct with StructHandler and use RestrictByIP
// middleware to only allow specified IP addresses
http.HandleFunc(
"/status/config",
goserv.RestrictByIP(
goserv.StructHandler(Conf, true), []string{"127.0.0.1"}))
// Make a new server.
server := goserv.NewServer(Conf)
// Log that we are listing
goserv.Logger.Infof("Listening for connections on %s", server.Addr)
// And listen for connections
server.ListenAndServe()
}
func handleInternalRuntime(arg3 []byte) interface{} {
var opts GoRuntimeStateOptions
json.Unmarshal(arg3, &opts)
state := GoRuntimeState{
NumGoroutines: runtime.NumGoroutine(),
NumCPU: runtime.NumCPU(),
NumCGo: runtime.NumCgoCall(),
}
runtime.ReadMemStats(&state.MemStats)
if opts.IncludeGoStacks {
state.GoStacks = getStacks()
}
return state
}
func (this *runtimeHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Cache-Control", "must-revalidate,no-cache,no-store")
runtime.ReadMemStats(&memstats)
js := make(map[string]interface{})
js["gomaxprocs"] = runtime.GOMAXPROCS(0)
js["numcgocall"] = runtime.NumCgoCall()
js["numcpu"] = runtime.NumCPU()
js["numgoroutine"] = runtime.NumGoroutine()
js["memstats"] = memstats
js1, err := json.Marshal(js)
if err != nil {
panic(err)
}
w.Header().Set("Content-Type", "application/json")
w.Write([]byte(js1))
}
// Collect memory usage metrics
func (mb *SquareMetrics) collectSystemMetrics() {
var mem runtime.MemStats
update := func(name string, value uint64) {
metrics.GetOrRegisterGauge(name, mb.registry).Update(int64(value))
}
updateFloat := func(name string, value float64) {
metrics.GetOrRegisterGaugeFloat64(name, mb.registry).Update(value)
}
sample := metrics.NewExpDecaySample(1028, 0.015)
gcHistogram := metrics.GetOrRegisterHistogram("runtime.mem.gc.duration", mb.registry, sample)
var observedPauses uint32
for range time.Tick(mb.interval) {
runtime.ReadMemStats(&mem)
update("runtime.mem.alloc", mem.Alloc)
update("runtime.mem.total-alloc", mem.TotalAlloc)
update("runtime.mem.sys", mem.Sys)
update("runtime.mem.lookups", mem.Lookups)
update("runtime.mem.mallocs", mem.Mallocs)
update("runtime.mem.frees", mem.Frees)
update("runtime.mem.heap.alloc", mem.HeapAlloc)
update("runtime.mem.heap.sys", mem.HeapSys)
update("runtime.mem.heap.idle", mem.HeapIdle)
update("runtime.mem.heap.inuse", mem.HeapInuse)
update("runtime.mem.heap.released", mem.HeapReleased)
update("runtime.mem.heap.objects", mem.HeapObjects)
update("runtime.mem.stack.inuse", mem.StackInuse)
update("runtime.mem.stack.sys", mem.StackSys)
update("runtime.goroutines", uint64(runtime.NumGoroutine()))
update("runtime.cgo-calls", uint64(runtime.NumCgoCall()))
update("runtime.mem.gc.num-gc", uint64(mem.NumGC))
updateFloat("runtime.mem.gc.cpu-fraction", mem.GCCPUFraction)
// Update histogram of GC pauses
for ; observedPauses < mem.NumGC; observedPauses++ {
gcHistogram.Update(int64(mem.PauseNs[(observedPauses+1)%256]))
}
}
}
// collect & publish to statsd
func collect() {
tag := ""
if hostname, err := os.Hostname(); err == nil {
tag += hostname
} else {
log.Warning(SERVICE, err)
}
// executable name
if exe_name, err := os.Readlink("/proc/self/exe"); err == nil {
tag += "." + path.Base(exe_name)
} else {
tag += fmt.Sprintf(".%v", os.Getpid())
log.Warning(SERVICE, err)
}
memstats := &runtime.MemStats{}
runtime.ReadMemStats(memstats)
_statter.Counter(1.0, tag+".NumGoroutine", int(runtime.NumGoroutine()))
_statter.Counter(1.0, tag+".NumCgoCall", int(runtime.NumCgoCall()))
if memstats.NumGC > 0 {
_statter.Counter(1.0, tag+".NumGC", int(memstats.NumGC))
_statter.Timing(1.0, tag+".PauseTotal", time.Duration(memstats.PauseTotalNs))
_statter.Timing(1.0, tag+".LastPause", time.Duration(memstats.PauseNs[(memstats.NumGC+255)%256]))
_statter.Counter(1.0, tag+".Alloc", int(memstats.Alloc))
_statter.Counter(1.0, tag+".TotalAlloc", int(memstats.TotalAlloc))
_statter.Counter(1.0, tag+".Sys", int(memstats.Sys))
_statter.Counter(1.0, tag+".Lookups", int(memstats.Lookups))
_statter.Counter(1.0, tag+".Mallocs", int(memstats.Mallocs))
_statter.Counter(1.0, tag+".Frees", int(memstats.Frees))
_statter.Counter(1.0, tag+".HeapAlloc", int(memstats.HeapAlloc))
_statter.Counter(1.0, tag+".HeapSys", int(memstats.HeapSys))
_statter.Counter(1.0, tag+".HeapIdle", int(memstats.HeapIdle))
_statter.Counter(1.0, tag+".HeapInuse", int(memstats.HeapInuse))
_statter.Counter(1.0, tag+".HeapReleased", int(memstats.HeapReleased))
_statter.Counter(1.0, tag+".HeapObjects", int(memstats.HeapObjects))
_statter.Counter(1.0, tag+".StackInuse", int(memstats.StackInuse))
_statter.Counter(1.0, tag+".StackSys", int(memstats.StackSys))
_statter.Counter(1.0, tag+".MSpanInuse", int(memstats.MSpanInuse))
_statter.Counter(1.0, tag+".MSpanSys", int(memstats.MSpanSys))
_statter.Counter(1.0, tag+".MCacheInuse", int(memstats.MCacheInuse))
_statter.Counter(1.0, tag+".MCacheSys", int(memstats.MCacheSys))
_statter.Counter(1.0, tag+".BuckHashSys", int(memstats.BuckHashSys))
_statter.Counter(1.0, tag+".GCSys", int(memstats.GCSys))
_statter.Counter(1.0, tag+".OtherSys", int(memstats.OtherSys))
}
}
func restGetRuntime(w http.ResponseWriter, r *http.Request) {
jsonEncode(w, map[string]interface{}{
"startTime": startTime,
"arch": runtime.GOARCH,
"os": runtime.GOOS,
"numCPU": runtime.NumCPU(),
"go": map[string]interface{}{
"GOMAXPROCS": runtime.GOMAXPROCS(0),
"GOROOT": runtime.GOROOT(),
"version": runtime.Version(),
"numGoroutine": runtime.NumGoroutine(),
"numCgoCall": runtime.NumCgoCall(),
"compiler": runtime.Compiler,
"memProfileRate": runtime.MemProfileRate,
},
})
}
// Capture new values for the Go runtime statistics exported in
// runtime.MemStats. This is designed to be called in a background
// goroutine. Giving a registry which has not been given to
// RegisterRuntimeMemStats will panic. If the second parameter is
// false, the counters will be left to the lazy updates provided by
// the runtime.
func CaptureRuntimeMemStats(r Registry, readMemStats bool) {
var m runtime.MemStats
if readMemStats {
runtime.ReadMemStats(&m)
}
r.Get("runtime.MemStats.Alloc").(Gauge).Update(int64(m.Alloc))
r.Get("runtime.MemStats.TotalAlloc").(Gauge).Update(int64(m.TotalAlloc))
r.Get("runtime.MemStats.Sys").(Gauge).Update(int64(m.Sys))
r.Get("runtime.MemStats.Lookups").(Gauge).Update(int64(m.Lookups))
r.Get("runtime.MemStats.Mallocs").(Gauge).Update(int64(m.Mallocs))
r.Get("runtime.MemStats.Frees").(Gauge).Update(int64(m.Frees))
r.Get("runtime.MemStats.HeapAlloc").(Gauge).Update(int64(m.HeapAlloc))
r.Get("runtime.MemStats.HeapSys").(Gauge).Update(int64(m.HeapSys))
r.Get("runtime.MemStats.HeapIdle").(Gauge).Update(int64(m.HeapIdle))
r.Get("runtime.MemStats.HeapInuse").(Gauge).Update(int64(m.HeapInuse))
r.Get("runtime.MemStats.HeapObjects").(Gauge).Update(int64(m.HeapObjects))
r.Get("runtime.MemStats.StackInuse").(Gauge).Update(int64(m.StackInuse))
r.Get("runtime.MemStats.StackSys").(Gauge).Update(int64(m.StackSys))
r.Get("runtime.MemStats.MSpanInuse").(Gauge).Update(int64(m.MSpanInuse))
r.Get("runtime.MemStats.MSpanSys").(Gauge).Update(int64(m.MSpanSys))
r.Get("runtime.MemStats.MCacheInuse").(Gauge).Update(int64(m.MCacheInuse))
r.Get("runtime.MemStats.MCacheSys").(Gauge).Update(int64(m.MCacheSys))
r.Get("runtime.MemStats.BuckHashSys").(Gauge).Update(int64(m.BuckHashSys))
r.Get("runtime.MemStats.NextGC").(Gauge).Update(int64(m.NextGC))
r.Get("runtime.MemStats.PauseTotalNs").(Gauge).Update(int64(m.PauseTotalNs))
r.Get("runtime.MemStats.PauseNs").(Histogram).Update(int64(m.PauseNs[0]))
r.Get("runtime.MemStats.NumGC").(Gauge).Update(int64(m.NumGC))
if m.EnableGC {
r.Get("runtime.MemStats.EnableGC").(Gauge).Update(1)
} else {
r.Get("runtime.MemStats.EnableGC").(Gauge).Update(0)
}
if m.EnableGC {
r.Get("runtime.MemStats.DebugGC").(Gauge).Update(1)
} else {
r.Get("runtime.MemStats.DebugGC").(Gauge).Update(0)
}
r.Get("runtime.NumCgoCall").(Gauge).Update(int64(runtime.NumCgoCall()))
r.Get("runtime.NumGoroutine").(Gauge).Update(int64(runtime.NumGoroutine()))
}
