mirror of
https://github.com/astaxie/beego.git
synced 2024-10-06 13:11:52 +00:00
159 lines
4.3 KiB
Go
159 lines
4.3 KiB
Go
// Copyright 2014 beego Author. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package governor
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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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"path"
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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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"github.com/astaxie/beego/core/utils"
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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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// ProcessInput 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 "get cpuprof":
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GetCPUProfile(w)
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case "get memprof":
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MemProf(w)
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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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// MemProf record memory profile in pprof
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func MemProf(w io.Writer) {
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filename := "mem-" + strconv.Itoa(pid) + ".memprof"
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if f, err := os.Create(filename); err != nil {
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fmt.Fprintf(w, "create file %s error %s\n", filename, err.Error())
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log.Fatal("record heap 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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fmt.Fprintf(w, "create heap profile %s \n", filename)
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_, fl := path.Split(os.Args[0])
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fmt.Fprintf(w, "Now you can use this to check it: go tool pprof %s %s\n", fl, filename)
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}
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}
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// GetCPUProfile start cpu profile monitor
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func GetCPUProfile(w io.Writer) {
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sec := 30
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filename := "cpu-" + strconv.Itoa(pid) + ".pprof"
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f, err := os.Create(filename)
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if err != nil {
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fmt.Fprintf(w, "Could not enable CPU profiling: %s\n", err)
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log.Fatal("record cpu profile failed: ", err)
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}
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pprof.StartCPUProfile(f)
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time.Sleep(time.Duration(sec) * time.Second)
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pprof.StopCPUProfile()
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fmt.Fprintf(w, "create cpu profile %s \n", filename)
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_, fl := path.Split(os.Args[0])
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fmt.Fprintf(w, "Now you can use this to check it: go tool pprof %s %s\n", fl, filename)
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}
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// PrintGCSummary 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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utils.ToShortTimeFormat(lastPause),
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utils.ToShortTimeFormat(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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utils.ToShortTimeFormat(gcstats.PauseQuantiles[94]),
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utils.ToShortTimeFormat(gcstats.PauseQuantiles[98]),
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utils.ToShortTimeFormat(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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