GO PPROF 高cpu负载分析

参考文档

http://www.topgoer.com/其他/pprof性能调优.html

https://blog.wolfogre.com/posts/go-ppof-practice/#前言

编写源码

package main

import (
    "fmt"
    "net/http"
    _ "net/http/pprof"
    "runtime"
)

func main() {
    runtime.GOMAXPROCS(1)
    runtime.SetMutexProfileFraction(1)
    runtime.SetBlockProfileRate(1)
    registerProf()
    CupWait{}.CpuWait()
}

func registerProf() {
    port := ":8060"
    go func() {
        err := http.ListenAndServe(port, nil)
        if err != nil {
            panic("pprof start error" + err.Error())
        }
    }()
}

type CupWait struct {
}

func (c CupWait) CpuWait() {
    fmt.Println("cpu wait start")
    for i := 0; i < 1000000000000; i++ {
    }
    fmt.Println("cpu wait end")
}

执行分析命令

go tool pprof -http=:8000 http://127.0.0.1:8060/debug/pprof/profile
go tool pprof -seconds=5 http://localhost:8080/debug/pprof/profile
go tool pprof http://localhost:6060/debug/pprof/profile

 curl -o cpu.out http://localhost:8060/debug/pprof/profile
 go tool pprof -http=:8000 cpu.out

分析结果