1.在程序import 中增加
_ "net/http/pprof"
2.程序中增加
go func() {
log.Println(http.ListenAndServe("localhost:6060", nil))
}()
3.運行程序
go run main.go
4.另啟動terminal,運行
go tool pprof --text http://localhost:6060/debug/pprof/profile ，如下：
$ go tool pprof --text http://localhost:6060/debug/pprof/profile
Fetching profile over HTTP from http://localhost:6060/debug/pprof/profile
Saved profile in C:\Users\Administrator.WIN7-1609091712\pprof\pprof.samples.cpu.004.pb.gz
Type: cpu
Time: Jun 23, 2020 at 2:59pm (CST)
Duration: 30.17s, Total samples = 13.79s (45.71%)
Showing nodes accounting for 13.53s, 98.11% of 13.79s total
Dropped 84 nodes (cum <= 0.07s)
flat flat% sum% cum cum%
13.52s 98.04% 98.04% 13.53s 98.11% runtime.cgocall
0.01s 0.073% 98.11% 13.56s 98.33% github.com/goburrow/modbus.(*client).ReadHoldingRegisters
0 0% 98.11% 13.55s 98.26% github.com/goburrow/modbus.(*client).send
0 0% 98.11% 13.55s 98.26% github.com/goburrow/modbus.(*rtuSerialTransporter).Send
0 0% 98.11% 13.46s 97.61% github.com/goburrow/serial.(*port).Read
0 0% 98.11% 13.46s 97.61% io.ReadAtLeast
0 0% 98.11% 13.45s 97.53% syscall.ReadFile
0 0% 98.11% 13.52s 98.04% syscall.Syscall6
0 0% 98.11% 13.58s 98.48% xxnet/modstation.(*Channel).getTemp
0 0% 98.11% 13.56s 98.33% xxnet/modstation.(*Channel).readTemperature
0 0% 98.11% 13.59s 98.55% xxnet/modstation.(*Channel).requestData
0 0% 98.11% 13.62s 98.77% xxnet/modstation.(*ChannelManager).RequestData.func1
0 0% 98.11% 0.07s 0.51% xxnet/modstation.(*ChannelManager).writePointThread
5.運行
go tool pprof -http=:8080 "C:\Users\Administrator.WIN7-1609091712\pprof\pprof.samples.cpu.004.pb.gz"
Serving web UI on http://localhost:8080
彈出界面
http://localhost:8080/ui/?si=cpu
以上只是使用方法，沒做深入的使用分析。是個好工具！