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This article mainly explains "how to understand golang, gin, pprof". Interested friends may wish to have a look. The method introduced in this paper is simple, fast and practical. Now let the editor take you to learn "how to understand golang, gin, pprof"!

GO performance analysis

The Go language has built-in tools to obtain program running data, including the following two standard libraries:

Runtime/pprof: collect the running data of tool-based applications for analysis

Net/http/pprof: collect run-time data of service-oriented applications for analysis

What is pprof?

Pprof is a tool for visualizing and analyzing performance analysis data

Pprof reads a collection of analysis samples in profile.proto and generates reports to visualize and help analyze data (support for text and graphical reports)

Profile.proto is a Protocol Buffer v3 description file that describes a set of callstack and symbolization information to represent a set of samples for statistical analysis of the call stack, is a very common stacktrace configuration file format

What usage modes are supported?

Report generation: report generation

Interactive terminal use: interactive terminal use

Web interface:Web interface

What can I do?

CPU Profiling:CPU analysis, according to a certain frequency to collect the usage of the monitored application CPU (including registers), you can determine the location of the time spent by the application when actively consuming CPU cycles

Memory Profiling: memory analysis, recording stack traces as applications make heap allocations, monitoring current and historical memory usage, and checking for memory leaks

Block Profiling: blocking analysis, recording the location of goroutine blocking waiting for synchronization (including timer channels)

Mutex Profiling: mutex analysis, reporting mutex competition

How does Gin do performance testing? what is gin?

Gin,ojbk is a http framework (it should be said to be just a component)

Gin pprof

We saw that pprof is only under runtime and http. What about gin?

Don't worry, look for it and find it, and sure enough:

Go get https://github.com/gin-contrib/pprof

The relevant demo was found in github:

It is equivalent to signing up for gin.

After running, it is as follows:

Open: http://localhost:8080/debug/pprof/ (I am 8083 here)

At this point, you can carry out pressure testing and data acquisition. Go pprof supports the command line.

Go tool pprof-- seconds 20 http://localhost:3000/debug/pprof/goroutinego tool pprof http://localhost:3000/debug/pprof/goroutine?second=20go tool pprof command line interface

Go tool pprof can also achieve powerful functions through the command line, let's take a look at the commands!

Top defaults to viewing the functions in the program that occupy the top 10 bits of cpu. List + function name command to view the specific function analysis pdf can generate a visual pdf file. So let's start the stress test.

Start our service.

Go run main.go

Pressure testing tool

Https://github.com/wg/wrk or https://github.com/adjust/go-wrk is recommended

I am using go-wrk

Git clone git://github.com/adeven/go-wrk.gitcd go-wrkgo build./go-wrk-cantilever 100-taper 8-nylon 1000 http://localhost:8083/info/325720270784552960/1

Observe

Through observation, we find that the main performance consumption is in runtime, net and sql.

A complete pprof gin observation has been made here.

Be careful

We should only introduce pprof into our code during performance testing

At this point, I believe you have a deeper understanding of "how to understand golang, gin, pprof". You might as well do it in practice. Here is the website, more related content can enter the relevant channels to inquire, follow us, continue to learn!

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