PHP performance analysis tool - installation and use of xhprof

1. Foreword

It’s better to record the useful things to facilitate future inquiries; this time, record the installation and use of xhprof;

xhprof is a lightweight performance analysis of PHP open sourced by Facebook Tool, similar to Xdebug, but with lower performance overhead.

　 It can also be used in a production environment, and it can also be controlled by a program switch whether to profile.

2. Installation

<spanmicrosoft yahei>1.    wget http:<span>//</span><span>pecl.php.net/get/xhprof-0.9.3.tgz  </span>
2.    tar zxf xhprof-0.9.3.<span>tgz  

</span>3.    cd xhprof-0.9.3/<span>extension

</span>4.    /usr/bin/<span>phpize 
     (php版本安装后生成的phpize文件，可根据phpinfo查看，所以php版本不同，生成的phpize也不同，此步骤主要生成configure文件)

</span>5.    ./configure  –with-php-c/bin/php-<span>config  
    (php</span>-<span>config的路径，也是php安装后生成的文件)  

</span>6.<span>    make  

</span>7.<span>    sudo make install 
    (会自动将生成的扩展文件拷贝到扩展目录中</span>/usr/lib64/php/<span>modules)

    当然具体的php文件的目录，每个人不尽相同，可根据phpinfo查询</span></spanmicrosoft>

3. php.ini configuration

<spanmicrosoft yahei><span>1</span><span>根据phpinfo找到 extension_dir的目录
</span><span>2</span> （/etc/php.d/xhprof.<span>ini）
</span><span>3</span><span>4</span><span>添加一下内容：
</span><span>5</span><span>6</span> extension=xhprof.<span>so
</span><span>7</span> xhprof.output_dir=/tmp/xhprof <span>//</span><span>xhprof的分析日志</span></spanmicrosoft>

4. Restart the service

<spanmicrosoft yahei><span>1</span> sudo /etc/init.d/<span>http restart
</span><span>2</span><span>3</span> 查看phpinfo是否安装成功</spanmicrosoft>

5. Usage

<spanmicrosoft yahei><span> 1</span><span>开头：
</span><span> 2</span> xhprof_enable(); <span>//</span><span>开启监测  
</span><span> 3</span><span>//xhprof_enable(XHPROF_FLAGS_NO_BUILTINS); 不记录内置的函数  
</span><span> 4</span><span>//xhprof_enable(XHPROF_FLAGS_CPU + XHPROF_FLAGS_MEMORY);  同时分析CPU和Mem的开销  
</span><span> 5</span><span> 6</span><span>//要测试的代码</span><span> 7</span> ...
<span> 8</span> ...
<span> 9</span> ...
<span>10</span><span>11</span><span>结尾：
</span><span>12</span><span>$xhprof_data</span> = xhprof_disable();  <span>//</span><span>停止监测，返回运行数据</span><span>13</span><span>$xhprof_root</span> = '/（xhprof的虚拟主机目录）/'<span>;  
</span><span>14</span><span>//</span><span>引入当初安装到xhprof虚拟主机目录中的文件</span><span>15</span><span>include_once</span><span>$xhprof_root</span>."xhprof_lib/utils/xhprof_lib.php"<span>;  
</span><span>16</span><span>include_once</span><span>$xhprof_root</span>."xhprof_lib/utils/xhprof_runs.php"<span>;   
</span><span>17</span><span>$xhprof_runs</span> = <span>new</span><span> XHProfRuns_Default();   
</span><span>18</span><span>$run_id</span> = <span>$xhprof_runs</span>->save_run(<span>$xhprof_data</span>, "xhprof"<span>);
</span><span>19</span><span>echo</span> '<a href="http://%EF%BC%88xhprof%E7%9A%84%E8%99%9A%E6%8B%9F%E4%B8%BB%E6%9C%BA%E5%9F%9F%E5%90%8D%EF%BC%89/xhprof_html/index.php?run='.<span>%24run_id</span>.'&source=xhprof" target="_blank">xhprof统计</a>'<span>;  </span></spanmicrosoft>

　 Top The code uses the method of setting a virtual host for xhprof.

Copy the xhprof_html and xhprof_lib folders in the source code package to the virtual directory you created

　cp -r xhprof_html xhprof_lib /xxx/xhprof/ (The purpose here is to create a data analysis directory, you can use this directory Configured as a virtual host access)

After running, click the xhprof statistics link returned for statistics.

6. Attention issues and explanations of terms

In the displayed statistics page, click [View Full Callgraph] for graphical display (the biggest performance problems will be marked in red, followed by yellow);

　After clicking, an error message may be prompted, just execute the following command

<spanmicrosoft yahei><span>1</span> yum install -<span>y graphviz
</span><span>2</span> yum install graphviz-gd</spanmicrosoft>

　Explanation of terms

<spanmicrosoft yahei><span> 1</span><span>Function</span><span> Name 函数名
</span><span> 2</span><span>    Calls 调用次数
</span><span> 3</span>     Calls%<span> 调用百分比
</span><span> 4</span>     Incl. Wall <span>Time</span><span> (microsec) 调用的包括子函数所有花费时间 以微秒算(一百万分之一秒)
</span><span> 5</span>     IWall%<span> 调用的包括子函数所有花费时间的百分比
</span><span> 6</span>     Excl. Wall <span>Time</span> (microsec) 函数执行本身花费的时间，不包括子树执行时间,<span>以微秒算(一百万分之一秒)
</span><span> 7</span>     EWall%<span> 函数执行本身花费的时间的百分比，不包括子树执行时间
</span><span> 8</span>     Incl. CPU(microsecs) 调用的包括子函数所有花费的cpu时间。减Incl.<span> Wall Time即为等待cpu的时间
</span><span> 9</span>     减Excl.<span> Wall Time即为等待cpu的时间
</span><span>10</span>     ICpu% Incl.<span> CPU(microsecs)的百分比
</span><span>11</span>     Excl. CPU(microsec) 函数执行本身花费的cpu时间，不包括子树执行时间,<span>以微秒算(一百万分之一秒)。
</span><span>12</span>     ECPU% Excl.<span> CPU(microsec)的百分比
</span><span>13</span>     Incl.<span>MemUse(bytes) 包括子函数执行使用的内存。
</span><span>14</span>     IMemUse% Incl.<span>MemUse(bytes)的百分比
</span><span>15</span>     Excl.MemUse(bytes) 函数执行本身内存,<span>以字节算
</span><span>16</span>     EMemUse% Excl.<span>MemUse(bytes)的百分比
</span><span>17</span>     Incl.PeakMemUse(bytes) Incl.<span>MemUse的峰值
</span><span>18</span>     IPeakMemUse% Incl.<span>PeakMemUse(bytes) 的峰值百分比
</span><span>19</span>     Excl.PeakMemUse(bytes) Excl.<span>MemUse的峰值
</span><span>20</span>     EPeakMemUse% EMemUse% 峰值百分比</spanmicrosoft>

7. References

<spanmicrosoft yahei><span>1</span> http:<span>//</span><span>blog.csdn.net/maitiandaozi/article/details/8896293</span><span>2</span> http:<span>//</span><span>www.cnblogs.com/wangtao_20/archive/2011/03/16/1986508.html</span><span>3</span> http:<span>//</span><span>www.cnblogs.com/wangtao_20/archive/2013/09/13/3320497.html</span><span>4</span><span>5</span> http:<span>//</span><span>avnpc.com/pages/profiler-php-performance-online-by-xhprof</span><span>6</span> http:<span>//</span><span>www.ituring.com.cn/article/133062?utm_source=tuicool</span></spanmicrosoft>

The above introduces the installation and use of the PHP performance analysis tool - xhprof, including the relevant content. I hope it will be helpful to friends who are interested in PHP tutorials.