How to use xhprof to test php performance in php7? (Method introduction)

Introduction

1 Background

• PHP's xhprof extension Facebook will no longer be updated and maintained because Facebook has fully used HHVM and no longer uses the PHP zend engine.

• xhprof does not support the new version of PHP (PHP7). The tideways extension is maintained from the xhprof project fork and currently supports PHP 7.2, 7.1, 7.0, 5.6 and 5.5.

• tideways is an open source project. It only charges for UI services. In fact, xhgui can fully meet our daily needs

# #2 Function

Tideways is an extension used to test PHP performance. It can obtain the functions called during the entire process of PHP execution, the number of function calls, execution time, CPU time, and memory usage. , memory peak, total execution time, total CPU time, total memory usage, total memory peak and other data, analyze the above data to find out the performance bottleneck of PHP, analyze the PHP execution process, etc.

3 Advantages

• tideways is a PHP extension, combined with xhgui, there is no need to bury it in the PHP code Monitoring code

• You can set the execution frequency (for example, 1/100) without generating execution logs for every request, resulting in performance loss; you can also actively control whether to generate execution logs by requesting Parameters to control (debug=1)

• There is a simple and direct UI to transform data

• You can freely match the conditions for data filtering. For example, analyze a specific interface, analyze the interface request situation in a certain time period, etc.

4 Disadvantages

Although non-intrusive, if execution logs are generated for each interface, the consumption of CPU and memory is not negligible.

5 Implementation principle

tideways extension is responsible for generating running logs
• In nginx, by configuring fastcgi_param PHP_VALUE auto_prepend_file, Execute the PHP file configured with auto_prepend_file before the request starts. The register_shutdown_function method is used in the file. At the end of the PHP process, tideways_disable is called to realize the embedding of tideways. Then the execution log is stored in mongodb or mysql or a file, and displayed after analysis by xhgui. , display formats include bar chart, waterfall flow, and flame chart.

Application

Next, we will introduce two application methods:

IntrusiveandNon-invasive

The intrusive type refers to adding code to the code, and the intrusive type uses the default UI;

The non-intrusive type refers to adding code without making any changes to the code. Modify nginx/apache to implement code injection, using xhgui non-invasively;

Installation

tideways_xhprof

git clone "https://github.com/tideways/php-xhprof-extension.git"
cd php-xhprof-extension
phpize
./configure --with-php-config=/usr/local/php7/bin/php-config
make
sudo make install

Add extension=tideways_xhprof.so# in php.ini

##Non-intrusive:

<?php tideways_xhprof_enable();

// your application code

$data = tideways_xhprof_disable();
file_put_contents(
    sys_get_temp_dir() . "/" . uniqid() . ".yourapp.xhprof",
    serialize($data)
);

  // $data = tideways_xhprof_disable();
  // file_put_contents(
  //     sys_get_temp_dir() . "/" . date(&#39;His&#39;, time()) . ".material.xhprof",
  //     serialize($data)
  // );

The .xhprof file generated here is in the tmp directory. The default UI will also search for .xhprof in the tmp directory. File

Installs the default UI used to find data

git clone git@github.com:phacility/xhprof.git

xhprof_lib

and in this repository xhprof_html directory into your web folder and navigate to xhprof_html/index.php to see the trace list. If you want to see function call notes, you need to install Callgraph

Install CallgraphCallgraph is actually a combination of three tools become.

One is cflow or calltree which is used to generate C function call tree. The following mainly introduces cflow.

A tool for processing dot text graphics language, enhanced by graphviz.

A script for converting C function call tree to dot format: tree2dotx

Take Ubuntu as an example, install them separately:

sudo apt-get install cflow graphviz

Next install tree2dotx and Callgraph , here they are installed to /usr/local/bin by default.

wget -c https://github.com/tinyclub/linux-0.11-lab/raw/master/tools/tree2dotx
wget -c https://github.com/tinyclub/linux-0.11-lab/raw/master/tools/callgraph
sudo cp tree2dotx callgraph /usr/local/bin
sudo chmod +x /usr/local/bin/{tree2dotx,callgraph}

The next two renderings are shown:

Intrusive: Intrusive use of xhgui requires mongodb

Install xhgui

git clone git@github.com:perftools/xhgui.git

Configure Nginx

server {
  listen 80;
  server_name site.localhost;
  root /Users/markstory/Sites/awesome-thing/app/webroot/;
  fastcgi_param PHP_VALUE "auto_prepend_file=/home/www/xhgui/external/header.php";  #这里依据个人目录而配
}

What this means is to execute header.php before executing the project php code, so as to achieve the purpose of non-intrusive detection performance

xhgui configuration (Frequency of generating logs)In xhgui’s config/config.default.php, the number of sampling hits can be set;

return rand(1, 100) === 42; 为1%的采样率，改成return True;则标识每次都采样

'profiler.enable' => function() {
   // url 中包含debug=1则百分百捕获
   if(!empty($_GET['debug'])){
       return True;
   }else{
       // 1%采样
       return rand(1, 100) === 42;
   }
}

mongodb的配置

　　 xhgui/config/config.default.php

// Can be either mongodb or file.
   /*
   'save.handler' => 'file',
   'save.handler.filename' => dirname(__DIR__) . '/cache/' . 'xhgui.data.' . microtime(true) . '_' . substr(md5($url), 0, 6),
   */
   'save.handler' => 'mongodb',
   // Needed for file save handler. Beware of file locking. You can adujst this file path
   // to reduce locking problems (eg uniqid, time ...)
   //'save.handler.filename' => __DIR__.'/../data/xhgui_'.date('Ymd').'.dat',
   'db.host' => 'mongodb://127.0.0.1:27017',
   'db.db' => 'xhprof',

mongo服务器的配置

mongo
 > use xhprof
 > db.results.ensureIndex( { 'meta.SERVER.REQUEST_TIME' : -1 } )
 > db.results.ensureIndex( { 'profile.main().wt' : -1 } )
 > db.results.ensureIndex( { 'profile.main().mu' : -1 } )
 > db.results.ensureIndex( { 'profile.main().cpu' : -1 } )
 > db.results.ensureIndex( { 'meta.url' : 1 } )

最后展示几张xhgui的效果图

 

 

 

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