英文:
The go 1.5 trace command
问题
Go 1.5发布说明中提到：
> 新的"go tool trace"命令可以可视化运行时生成的程序跟踪信息。
这真的很令人兴奋，我想了解更多。但是官方文档https://golang.org/cmd/trace/非常枯燥。
发现Rob Pike对此提出了抱怨，要求在"1.5发布后不久应该有一篇关于该功能的博文"。
如果有人发布/发现了这样的博文，请在这里添加链接。或者，如果你愿意在这里直接回答，也非常欢迎。
谢谢
英文:
The Go 1.5 release note says,
> The new "go tool trace" command enables the visualisation of program traces generated by new tracing infrastructure in the runtime.
This is really exciting, and I want to know more about it. But its official document at https://golang.org/cmd/trace/ is really dry.
Found that Rob Pike complained about it, requesting that "shortly after the 1.5 release, there should be a blog post about the feature."
If anyone has posted/spotted such a blog, please add a link here. Or, if you like to answer directly here, it is also welcome as well.
Thanks
答案1
得分: 16
有两种方法可以生成跟踪文件。
方法1
-
在程序的开头添加以下代码：
f, err := os.Create(time.Now().Format("2006-01-02T150405.pprof")) if err != nil { panic(err) } defer f.Close() if err := trace.Start(f); err != nil { panic(err) } defer trace.Stop() -
构建程序
go build
-
运行你的程序（例如
./myprogram） -
运行go trace。
go tool trace myprogram 2015-08-21T115354.pprof
方法2
-
编写一个利用testing包的测试函数。
-
使用跟踪标志运行测试。
go test -trace trace.out
-
使用生成的.test和.out文件运行跟踪工具。
go tool trace pkg.test trace.out
无论哪种方法，你的浏览器都会打开类似下面的页面
英文:
There are two ways you can generate trace files.
Method 1
-
Add following line at the start of your program
f, err := os.Create(time.Now().Format("2006-01-02T150405.pprof")) if err != nil { panic(err) } defer f.Close() if err := trace.Start(f); err != nil { panic(err) } defer trace.Stop() -
build the program
> go build -
Run your program (for example
./myprogram) -
Run go trace.
> go tool trace myprogram 2015-08-21T115354.pprof
Method 2
-
Write a testing function utilizing testing package.
-
Run Test with trace flag
> go test -trace trace.out -
Run trace tool with generated .test and .out file
> go tool trace pkg.test trace.out
In both cases your browser will open something like this
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