i just started to use perf in ubuntu 20LTS,but for every "perf record" i just got "killing" in terminal.
after that i just used "ls -l perf.data" and "perf report" for getting report like as which
you can see in the below image.
the final result i wanna get
but i just get this output:
the result i got
i really need help to get some trace schema like the first image.