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Home Backend Development Golang Traps and avoidance of golang function debugging and analysis tools

Traps and avoidance of golang function debugging and analysis tools

May 06, 2024 pm 03:21 PM
golang debug

golang 函數(shù)調(diào)試與分析工具的陷阱與回避

Pitfalls and Avoidances of Go Function Debugging and Analysis Tools

There are many useful tools when debugging and analyzing Go applications Available, for example: pprof, gotrace, and go tool trace. However, there are pitfalls in the use of these tools that need to be recognized and avoided to obtain the most accurate and useful results.

pprof trap

  • #Improper sampling rate setting: A sampling rate that is too high may cause application performance to degrade, while a sampling rate that is too low may cause The sampling rate may miss important information.
  • Function inlining is not disabled: Function inlining can reduce sampling accuracy, resulting in a lack of visibility into internal function calls. Inlining can be disabled using the -noinlining flag.
  • Insufficient sampling time: Give pprof Sufficient time to collect enough data is critical for accurate analysis.

Actual case: 

import (
    "log"
    "net/http"
    "runtime/pprof"
)

func main() {
    // 啟用 pprof，端口 6060
    go func() {
        log.Println(http.ListenAndServe("localhost:6060", nil))
    }()

    // 模擬要分析的應(yīng)用程序
    for i := 0; i < 1000000; i++ {
        // 這里放要分析的代碼
    }
}

gotrace trap

  • Improper activation method:SetTraceProfile should not be called in the application's main goroutine as it can deadlock the application.
  • File size limit: SetTraceProfile The generated file may be large, so you need to ensure that the file system has enough space.
  • Complex function calls: gotrace Performance on complex or recursive function calls may be poor, resulting in deadlocks or hangs.

Practical case: 

import (
    "fmt"
    "runtime"
    "time"
)

func traceFunc() {
    trace := runtime.GoroutineProfile(runtime.StackRecord{})
    if trace != nil {
        // 這里可以分析記錄的信息
    }
}

func main() {
    go func() {
        for {
            traceFunc()
            time.Sleep(time.Second)
        }
    }()

    // 模擬要分析的應(yīng)用程序
    for i := 0; i < 1000000; i++ {
        // 這里放要分析的代碼
    }
}

go tool trace trap

  • Complex settings : Using go tool trace requires configuring the trace server, which may be cumbersome.
  • Performance overhead: go tool trace will bring certain performance overhead to the application.
  • Poor event selection: When selecting events to track, you need to weigh the performance cost against the value of the information collected.

Practical case: 

# 啟動 trace 服務(wù)器
go tool trace -start -server=0.0.0.0:6060

# 運(yùn)行要分析的應(yīng)用程序
go run main.go

# 停止跟蹤并生成報(bào)告
go tool trace -stop

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