mirror of
https://github.com/astaxie/beego.git
synced 2024-12-23 16:40:51 +00:00
169 lines
3.9 KiB
Go
169 lines
3.9 KiB
Go
// Beego (http://beego.me/)
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// @description beego is an open-source, high-performance web framework for the Go programming language.
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// @link http://github.com/astaxie/beego for the canonical source repository
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// @license http://github.com/astaxie/beego/blob/master/LICENSE
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// @authors astaxie
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package toolbox
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import (
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"fmt"
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"io"
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"log"
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"os"
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"runtime"
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"runtime/debug"
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"runtime/pprof"
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"strconv"
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"time"
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)
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var startTime = time.Now()
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var pid int
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func init() {
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pid = os.Getpid()
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}
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// parse input command string
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func ProcessInput(input string, w io.Writer) {
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switch input {
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case "lookup goroutine":
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p := pprof.Lookup("goroutine")
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p.WriteTo(w, 2)
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case "lookup heap":
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p := pprof.Lookup("heap")
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p.WriteTo(w, 2)
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case "lookup threadcreate":
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p := pprof.Lookup("threadcreate")
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p.WriteTo(w, 2)
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case "lookup block":
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p := pprof.Lookup("block")
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p.WriteTo(w, 2)
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case "start cpuprof":
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StartCPUProfile()
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case "stop cpuprof":
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StopCPUProfile()
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case "get memprof":
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MemProf()
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case "gc summary":
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PrintGCSummary(w)
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}
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}
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// record memory profile in pprof
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func MemProf() {
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if f, err := os.Create("mem-" + strconv.Itoa(pid) + ".memprof"); err != nil {
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log.Fatal("record memory profile failed: ", err)
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} else {
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runtime.GC()
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pprof.WriteHeapProfile(f)
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f.Close()
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}
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}
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// start cpu profile monitor
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func StartCPUProfile() {
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f, err := os.Create("cpu-" + strconv.Itoa(pid) + ".pprof")
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if err != nil {
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log.Fatal(err)
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}
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pprof.StartCPUProfile(f)
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}
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// stop cpu profile monitor
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func StopCPUProfile() {
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pprof.StopCPUProfile()
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}
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// print gc information to io.Writer
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func PrintGCSummary(w io.Writer) {
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memStats := &runtime.MemStats{}
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runtime.ReadMemStats(memStats)
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gcstats := &debug.GCStats{PauseQuantiles: make([]time.Duration, 100)}
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debug.ReadGCStats(gcstats)
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printGC(memStats, gcstats, w)
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}
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func printGC(memStats *runtime.MemStats, gcstats *debug.GCStats, w io.Writer) {
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if gcstats.NumGC > 0 {
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lastPause := gcstats.Pause[0]
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elapsed := time.Now().Sub(startTime)
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overhead := float64(gcstats.PauseTotal) / float64(elapsed) * 100
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allocatedRate := float64(memStats.TotalAlloc) / elapsed.Seconds()
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fmt.Fprintf(w, "NumGC:%d Pause:%s Pause(Avg):%s Overhead:%3.2f%% Alloc:%s Sys:%s Alloc(Rate):%s/s Histogram:%s %s %s \n",
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gcstats.NumGC,
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toS(lastPause),
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toS(avg(gcstats.Pause)),
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overhead,
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toH(memStats.Alloc),
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toH(memStats.Sys),
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toH(uint64(allocatedRate)),
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toS(gcstats.PauseQuantiles[94]),
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toS(gcstats.PauseQuantiles[98]),
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toS(gcstats.PauseQuantiles[99]))
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} else {
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// while GC has disabled
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elapsed := time.Now().Sub(startTime)
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allocatedRate := float64(memStats.TotalAlloc) / elapsed.Seconds()
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fmt.Fprintf(w, "Alloc:%s Sys:%s Alloc(Rate):%s/s\n",
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toH(memStats.Alloc),
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toH(memStats.Sys),
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toH(uint64(allocatedRate)))
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}
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}
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func avg(items []time.Duration) time.Duration {
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var sum time.Duration
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for _, item := range items {
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sum += item
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}
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return time.Duration(int64(sum) / int64(len(items)))
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}
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// format bytes number friendly
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func toH(bytes uint64) string {
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switch {
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case bytes < 1024:
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return fmt.Sprintf("%dB", bytes)
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case bytes < 1024*1024:
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return fmt.Sprintf("%.2fK", float64(bytes)/1024)
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case bytes < 1024*1024*1024:
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return fmt.Sprintf("%.2fM", float64(bytes)/1024/1024)
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default:
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return fmt.Sprintf("%.2fG", float64(bytes)/1024/1024/1024)
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}
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}
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// short string format
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func toS(d time.Duration) string {
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u := uint64(d)
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if u < uint64(time.Second) {
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switch {
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case u == 0:
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return "0"
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case u < uint64(time.Microsecond):
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return fmt.Sprintf("%.2fns", float64(u))
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case u < uint64(time.Millisecond):
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return fmt.Sprintf("%.2fus", float64(u)/1000)
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default:
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return fmt.Sprintf("%.2fms", float64(u)/1000/1000)
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}
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} else {
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switch {
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case u < uint64(time.Minute):
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return fmt.Sprintf("%.2fs", float64(u)/1000/1000/1000)
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case u < uint64(time.Hour):
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return fmt.Sprintf("%.2fm", float64(u)/1000/1000/1000/60)
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default:
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return fmt.Sprintf("%.2fh", float64(u)/1000/1000/1000/60/60)
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}
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}
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}
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