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生成火焰图分析php代码
source link: https://y2k38.github.io/posts/how-to-generate-php-flamegraphs/
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生成火焰图分析php代码
发表于
2020-01-23 更新于 2020-02-02flamegraph是一款可视化工具，用户分析程序堆栈调用，x轴堆栈轨迹，y轴堆栈深度，x轴长度越长，占用更多cpu时间。下面简单介绍如何使用xdebug以及flamegraph生成火焰图
配置xdebug参数
xdebug.trace_output_name = xdebug.trace.%t.%s
xdebug.trace_enable_trigger = 1
xdebug.trace_output_dir = /tmp
xdebug.trace_enable_trigger_value = "<secret key>"
xdebug.trace_format=1
下载flamegraph，git clone https://github.com/brendangregg/FlameGraph.git，放置在任意位置
获取堆栈数据
请求页面/接口url，在url后面增加?XDEBUG_TRACE=<secret key>，获取php堆栈数据 curl http://youdomain.com?XDEBUG_TRACE=<secret key>
转换堆栈数据
./stackcollapse-xdebug.php /tmp/xdebug.trace.1579703170._data_www_yii2_web_index_php.xt > out.folded
生成火焰图
./flamegraph.pl out.folded > out.svg
How to generate PHP Flamegraphs
Flame Graphs visualize profiled code
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