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perf的常用操作

 1 year ago
source link: https://charon-cheung.github.io/2022/11/16/%E5%B8%B8%E7%94%A8%E5%B7%A5%E5%85%B7/perf%E7%9A%84%E5%B8%B8%E7%94%A8%E6%93%8D%E4%BD%9C/
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perf的常用操作 | 沉默杀手

perf的常用操作
2022-11-16|常用工具|
Word count: 82|Reading time: 1 min

先用ps aux找到进程的PID，再观察进程内各个函数的CPU使用情况：sudo perf top -p <pid>

分析cartographer_node 进程

记录采样结果，以供后续分析，加上-g会记录调用链：sudo perf record -g -p <pid>

在当前终端读取采样结果：sudo perf report，会自动读取perf.data

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