Go 调试

• Go 测试
• 环境变量
  • GODEBUG=gctrace=1
    • 打印GC信息
• http

  • import _ "net/http/pprof"
    func main() {
        log.Println(http.ListenAndServe("localhost:3999", nil))
    }
    go tool pprof http://localhost:3999/debug/pprof/profile
    go tool pprof http://localhost:3999/debug/pprof/heap
    go tool pprof http://localhost:3999/debug/pprof/block

• go tool pprof Xx.bin Xx.prof
  • inuse_space # -inuse_space显示真正使用的内存
  • cpuprofile=cpu.prof
  • memprofile=mem.prof
  • blockprofile=block.prof
  • svg # 输出svg
• go build
  • toolexec=“/usr/bin/time” # -toolexec在每个命令加上前缀
  • toolexec=“perf stat”
  • gcflags=’-memprofile=m.p’
  • gcflags=’-traceprofile=t.p’
• go test
  • blockprofile=b.p net/http
  • trace=t.p
• go tool trace Xx.bin t.p