寇同学的郭同学

> As to the high proportion of [unknown], can you first try `perf top -p ` with your program, and make sure you have build photon with debug-info(cmake) Thanks, we...

> In PR [#937](https://github.com/alibaba/PhotonLibOS/pull/937) , we have tried to make stack bottom with well set frame pointer. Now with `-fno-omit-frame-pointer`, perf tool with `-g` able to generate correct flame graph...