How to use xhprof analysis in php7

This article will introduce to you how to use xhprof analysis in php7. It has certain reference value. Friends in need can refer to it. I hope it will be helpful to everyone.

This is a pure document. If you need it in the future, you can look it up at any time and use xhprof for analysis to facilitate code testing and comparative analysis (supports php7).

Pre-build docker virtual test environment

docker run -it -p 80:80 -v /Users/xxx/Desktop/xhprof:/data phalcon /bin/bash

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1. Install xhprof

There are quite a few xhprofs that support php7, we use github.com/longxinH here /xh… This project.

1.1 Pull project

git clone https://github.com/longxinH/xhprof.git

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1.2 Install project

cd xhprof/extension/
/usr/server/php7/bin/phpize
./configure --with-php-config=/usr/server/php7/bin/php-config
make && make install

1.3 Add xhprof.so extension

Finish execution , we need to introduce this so file into the php.ini configuration

Check the php.ini file path

/usr/server/php7/bin/php --ini
 
Configuration File (php.ini) Path: /usr/server/php7/etc
Loaded Configuration File: /usr/server/php7/etc/php.ini
Scan for additional .ini files in: /usr/server/php7/etc/php
Additional .ini files parsed: (none)

编辑 /usr/server/php7/etc/php.ini
[Xhprof]
extension=xhprof.so
xhprof.output_dir=/data/logs

Restart php-fpm.

2. The process of building a case using xhprof

We embed the following code in front of the logic to be monitored

\xhprof_enable();
......
$order = new OrderAdepter();
$result = $order->getUserOrderByOrderNo(123);
......
$xhprof_data = \xhprof_disable();
print_r($xhprof_data);

output:

We found that two functions in the xhprof expansion were called. The meaning of the output value

ct represents the current number of calls to this function. In this case, it is all once

wt represents the time consumption of function execution time, the unit is microseconds

Seeing this, we find that the information we obtain is not very much, for example, we often also care about the occupied memory, cpu and other indicators.

\xhprof_enable(
XHPROF_FLAGS_MEMORY
+XHPROF_FLAGS_CPU
+XHPROF_FLAGS_NO_BUILTINS
);

output:

1. ##XHPROF_FLAGS_MEMORY statistical memory usage

2. XHPROF_FLAGS_CPU counts CPU usage

3. #We found that there are two output fields for statistical memory usage, mu and pmu. mu represents the memory used (bytes), and pmu represents the peak memory usage (bytes).

3. Chart xhprof

Of course, we still hope that the performance bottleneck can be observed more intuitively in the form of a chart. Let’s see how to use it.

3.1 At this time, we need to use the xhprof_lib library

When we downloaded the xhprof source code, the directory already contained

\xhprof_enable(XHPROF_FLAGS_MEMORY + XHPROF_FLAGS_CPU+XHPROF_FLAGS_NO_BUILTINS);
 
......
$order = new OrderAdepter();
$result = $order->getUserOrderByOrderNo(123);
......
 
$xhprof_data = \xhprof_disable();
 
include_once '/data/xhprof-master/xhprof_lib/utils/xhprof_lib.php';
include_once '/data/xhprof-master/xhprof_lib/utils/xhprof_runs.php';
$xhprof_runs = new \XHProfRuns_Default();
$run_id = $xhprof_runs->save_run($xhprof_data, 'your_project');
echo $run_id; //output 5cbf25e21fe9b

. The execution printed out a string, which we can understand as a file identifier. We found that the save_run method was executed, so where was it saved?

Do you remember another configuration when we introduced the xhprof.so extension?

Yes, under the path configured by xhprof.output_dir (you need to manually create the directory yourself)

If you are interested, you can open it and take a look. It contains some serialized object information we analyzed.

3.2 Configure a separate service to access Our analysis results

We point to the xhprof_html directory in our xhprof project

##I believe you now understand the role of our run_id and project in save_run

The top part of ours is an overview of the requested interface indicators, and the following is the specific execution of each calling function. .

Field name meaning Number of Calls callsIncl. Wall Time calls include all the time spent by sub-functions, measured in microseconds.Excl. Wall TimeThe time spent on the execution of the function itself, excluding subtree execution time, measured in microseconds Calculate Incl. The CPU call includes all the cpu time spent by the sub-function. Excl. The cpu time spent by the CPU function execution itself, excluding the subtree execution time, calculated in microseconds. Incl.MemUse includes the memory used by the sub-function execution, in bytes. Calculate the memory of the Excl.MemUse function execution itself, and calculate the peak value of Incl.PeakMemUseIncl.MemUse in bytes. The peak value of Excl.PeakMemUseExcl.MemUse

The remaining % endings are the corresponding proportions

3.3 [View Full Callgraph]

You can also execute the following two lines of code to install

yum install -y libpng
yum install -y graphviz

If you want to view the call process, you need to install the graphviz graphics library. Here we recommend manually installing graphviz 2.24 .0 This version (personally step on the pit, 2.40 is not supported)

yum -y install libtool-ltdl-devel
 
cd /data/graphviz-2.24.0
 
./configure
make
make install

Focus on the red and yellow parts, if you feel that only If you want to analyze a certain process, you can click into a method and then click [View Full Callgraph] to view the chart

4. The problem

We discovered when using xhprof above Strong dependency, several classes in the xhprof installation package are introduced in the code.

include_once '/data/xhprof-master/xhprof_lib/utils/xhprof_lib.php';
include_once '/data/xhprof-master/xhprof_lib/utils/xhprof_runs.php';

Here we can use the composer package reference to achieve the same function, and it is recommended to introduce the pbweb/xhprof package.

Recommended learning:

php video tutorial

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