項目結構
├── go.mod
├── go.sum
├── main.go
go.mod
module github.com/rongfengliang/gopsutillearning
go 1.13
require (
github.com/shirou/gopsutil v2.19.11+incompatible
github.com/stretchr/testify v1.4.0 // indirect
golang.org/x/sys v0.0.0-20191224085550-c709ea063b76 // indirect
)
代碼
package main
import (
"fmt"
"log"
"net/http"
_ "net/http/pprof"
"github.com/shirou/gopsutil/mem"
)
func printinfo() {
for {
// fetch virtual mem info
mem, err := mem.VirtualMemory()
if err != nil {
fmt.Println("some wrong", err)
} else {
fmt.Println((mem.String()))
}
}
}
func main() {
go printinfo()
log.Println(http.ListenAndServe("0.0.0.0:6060", nil))
}
pprof 使用
- 啟動
go run main.go
- 基本命令
go tool pprof http://localhost:6060/debug/pprof/profile?seconds=30
- 效果
查看cpu 火焰圖
- 生成profile
地址http://localhost:6060/debug/pprof/profile - 查看命令：
pprof -http 0.0.0.0:8080 profile
- UI效果
- 火焰圖
makefile 構建
為了方便，使用make 構建跨平台的可執行文件
- Makefile
build: clean compile
clean:
rm -rf pprof-demo-*
compile:
echo "Compiling for every OS and Platform"
GOOS=darwin GOARCH=amd64 go build -o pprof-demo-mac main.go
GOOS=linux GOARCH=amd64 go build -o pprof-demo-linux main.go
GOOS=windows GOARCH=amd64 go build -o pprof-demo-windows.exe main.go
- 使用
make build
說明
golang 的pprof 功能強大，是把應用性能分析的利器，注意需要安裝graphviz，結合自己的系統選擇安裝對應的版本
參考資料
https://golang.org/pkg/net/http/pprof/
https://github.com/google/pprof
https://github.com/rongfengliang/gopsutillearning
https://github.com/shirou/gopsutil