About perf tool set exclude_guest = 1 on guest environment

[Eric Lin]

Hi all,

Currently, I run the perf command 'perf record -e branches:u ls'  and
'perf record -e branches ls'. It will set exclude_guest = 1 as below:

# perf record -e branches:u ls
# perf evlist -v
branches:u: .., exclude_kernel: 1, exclude_hv: 1,, exclude_guest: 1, ..

# perf record -e branches ls
# perf evlist -v
branches: ..., exclude_guest: 1, ...

As I understand it, set exclude_guest =1 will not include guest counting.
May I ask if I run the above commands as a guest user, should the
architecture implementation ignore this exclude_guest flags and still
make perf can count guest events in Linux kernel?

Best regards,
Eric Lin