Golang pprof 性能分析与火焰图

<h3>1. 安装graphviz</h3> <h4>1.1 下载 graphviz (windows 环境)</h4> <pre><code class="lang-shell hljs">https://graphviz.gitlab.io/_pages/Download/windows/graphviz-2.38.msi </code></code></pre>

下载完之后安装,安装完成之后将graphviz的安装bin目录加入环境变量中

<pre><code class="lang-shell hljs"># 例如 C:\Program Files (x86)\Graphviz2.38\bin </code></code></pre> <h4>1.2 测试graphviz是否安装成功</h4> <pre><code class="lang-shell hljs">dot -version dot - graphviz version 2.38.0 (20140413.2041) libdir = "C:\Program Files (x86)\Graphviz2.38\bin" Activated plugin library: gvplugin_dot_layout.dll Using layout: dot:dot_layout Activated plugin library: gvplugin_core.dll Using render: dot:core Using device: dot:dot:core The plugin configuration file: C:\Program Files (x86)\Graphviz2.38\bin\config6 was successfully loaded. render : cairo dot fig gd gdiplus map pic pov ps svg tk vml vrml xdot layout : circo dot fdp neato nop nop1 nop2 osage patchwork sfdp twopi textlayout : textlayout device : bmp canon cmap cmapx cmapx_np dot emf emfplus eps fig gd gd2 gif gv imap imap_np ismap jpe jpeg jpg metafile pdf pic plain plain-ext png pov ps ps2 svg svgz tif tiff tk vml vmlz vrml wbmp xdot xdot1.2 xdot1.4 loadimage : (lib) bmp eps gd gd2 gif jpe jpeg jpg png ps svg </code></code></pre> <h3>2. 使用pprof</h3> <h4>2.1 修改代码</h4>

<code>main.go</code>

<pre><code class="lang-go hljs">import "net/http" import _ "net/http/pprof" func main() { http.ListenAndServe("0.0.0.0:8080", nil) } </code></code></pre>

启动程序

<code>go run main.go</code>

<pre><code class="lang-shell hljs"># 通过浏览器访问 http://127.0.0.1:8080/debug/pprof/ # 访问该地址将看到性能分析界面 </code></code></pre> <h4>2.2 火焰图生成</h4>

在命令行下执行

<pre><code class="lang-shell hljs">go tool pprof -http=:1234 http://localhost:8080/debug/pprof/profile # 执行上述命令稍微等会,浏览器上会出现一UI界面 VIEW->Flame Graph 看到火焰图 </code></code></pre> <h3>3. Gin框架使用pprof</h3> <h4>3.1 安装需要包</h4>

进入项目根目录,安装gin使用的pprof包

<pre><code class="lang-shell hljs"> go get github.com/gin-contrib/pprof </code></code></pre>

在项目中使用pprof
example:

<pre><code class="lang-shell hljs">package main import ( "github.com/gin-contrib/pprof" "github.com/gin-gonic/gin" ) func main() { router := gin.Default() pprof.Register(router) router.Run(":8080") } </code></code></pre> <h4>3.2 启动程序</h4> <blockquote>

启动程序之后会看到很多自动添加pprof 相关的接口

通过这些接口我们可以进行分析

</blockquote> <pre><code class="lang-shell hljs">go run main.go [GIN-debug] [WARNING] Creating an Engine instance with the Logger and Recovery middleware already attached. [GIN-debug] [WARNING] Running in "debug" mode. Switch to "release" mode in production. - using env: export GIN_MODE=release - using code: gin.SetMode(gin.ReleaseMode) [GIN-debug] GET /debug/pprof/ --> github.com/gin-contrib/pprof.pprofHandler.func1 (3 handlers) [GIN-debug] GET /debug/pprof/cmdline --> github.com/gin-contrib/pprof.pprofHandler.func1 (3 handlers) [GIN-debug] GET /debug/pprof/profile --> github.com/gin-contrib/pprof.pprofHandler.func1 (3 handlers) [GIN-debug] POST /debug/pprof/symbol --> github.com/gin-contrib/pprof.pprofHandler.func1 (3 handlers) [GIN-debug] GET /debug/pprof/symbol --> github.com/gin-contrib/pprof.pprofHandler.func1 (3 handlers) [GIN-debug] GET /debug/pprof/trace --> github.com/gin-contrib/pprof.pprofHandler.func1 (3 handlers) [GIN-debug] GET /debug/pprof/allocs --> github.com/gin-contrib/pprof.pprofHandler.func1 (3 handlers) [GIN-debug] GET /debug/pprof/block --> github.com/gin-contrib/pprof.pprofHandler.func1 (3 handlers) [GIN-debug] GET /debug/pprof/goroutine --> github.com/gin-contrib/pprof.pprofHandler.func1 (3 handlers) [GIN-debug] GET /debug/pprof/heap --> github.com/gin-contrib/pprof.pprofHandler.func1 (3 handlers) [GIN-debug] GET /debug/pprof/mutex --> github.com/gin-contrib/pprof.pprofHandler.func1 (3 handlers) [GIN-debug] GET /debug/pprof/threadcreate --> github.com/gin-contrib/pprof.pprofHandler.func1 (3 handlers) ... [GIN-debug] Environment variable PORT is undefined. Using port :8080 by default [GIN-debug] Listening and serving HTTP on :8080 </code></code></pre>

通过浏览器访问

<pre><code class="lang-shell hljs">http://127.0.0.1:8080/debug/pprof/ </code></code></pre> ~ ~