ubuntu18.04 性能分析工具perf的使用
参考：Ubuntu 安装perf正文：安装 perf先输入 perf， Command ‘perf’ not found，有对应的安装提示$ perfCommand 'perf' not found, but can be installed with:sudo apt install linux-tools-common$ sudo apt install linux-tools-common$ perfWARNING: perf not found for kerne
