perf-events

为什么80%的码农都做不了架构师？>>>   

linux perf

https://www.ibm.com/developerworks/cn/linux/l-cn-perf1/index.html http://blog.youkuaiyun.com/zhangskd/article/details/37902159 https://www.zhihu.com/question/27037437/answer/35028987 http://blog.youkuaiyun.com/u011630575/article/details/66476165

nginx火焰图： https://www.cnblogs.com/sxhlinux/p/6250619.html

• openresty的systemtap的工具：https://github.com/openresty/nginx-systemtap-toolkit
• 火焰图工具：https://github.com/brendangregg/FlameGraph

大体流程：

• capture stacks

    # perf record -F 99 -p 181 -g -- sleep 60
    # perf script > out.perf

• fold stacks

    $ ./stackcollapse-perf.pl out.perf > out.folded

• 生成火焰图

    $ ./flamegraph.pl out.kern_folded > kernel.svg

转载于:https://my.oschina.net/chuqq/blog/1574546