perf用来记录CPU中堆栈的调用情况
sudo apt-get install linux-tools-common linux-tools-generic linux-tools-`uname -r`
FlameGraph用来可视化perf的日志
git clone https://github.com/brendangregg/FlameGraph.git
./runYourApp
top
命令或ps aux|grep runYourApp
找到程序的进程号perf
记录CPU信息sudo perf record -F 99 -p yourPID -g -- sleep 30
perf.data
转换为out.perf
sudo perf script > out.perf
FlameGraph-master
cd FlameGraph-master
./stackcollapse-perf.pl out.perf > out.folded
./flamegraph.pl out.folded > kernel.svg
参考:
如何读懂火焰图
如何安装perf工具
GitHub:FlameGraph