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Date:   Wed, 16 Aug 2023 14:14:51 -0300
From:   Arnaldo Carvalho de Melo <acme@kernel.org>
To:     Ian Rogers <irogers@google.com>
Cc:     Peter Zijlstra <peterz@infradead.org>,
        Ingo Molnar <mingo@redhat.com>,
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        Brendan Gregg <brendan.d.gregg@gmail.com>
Subject: Re: [PATCH v1 2/4] perf trace: Migrate BPF augmentation to use a
 skeleton
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Em Wed, Aug 16, 2023 at 01:08:14PM -0300, Arnaldo Carvalho de Melo escreveu:
> [acme@five ~]$ getcap ~/bin/perf
> /var/home/acme/bin/perf cap_perfmon,cap_bpf=ep
> [acme@five ~]$ cat /proc/sys/kernel/unprivileged_bpf_disabled
> 2
> [acme@five ~]$ cat /proc/sys/kernel/perf_event_paranoid
> -1

This last one can remain at 2:

[acme@five ~]$ cat /proc/sys/kernel/perf_event_paranoid
2
[acme@five ~]$ perf trace -e bpf*,perf*,openat,connect* --max-events=10
     0.000 ( 0.031 ms): systemd-oomd/1151 openat(dfd: CWD, filename: "/proc/meminfo", flags: RDONLY|CLOEXEC)    = 11
    25.532 (         ): gnome-terminal/3223 openat(dfd: CWD, filename: "/proc/1244100/cmdline")                ...
   249.996 ( 0.031 ms): systemd-oomd/1151 openat(dfd: CWD, filename: "/proc/meminfo", flags: RDONLY|CLOEXEC)    = 11
   423.853 ( 0.036 ms): pool/2490 connect(fd: 7, uservaddr: { .family: LOCAL, path: /var/run/.heim_org.h5l.kcm-socket }, addrlen: 110) = 0
   423.929 ( 0.021 ms): sssd_kcm/2514 openat(dfd: CWD, filename: "/proc/2486/cmdline")                      = 16
   499.988 ( 0.030 ms): systemd-oomd/1151 openat(dfd: CWD, filename: "/proc/meminfo", flags: RDONLY|CLOEXEC)    = 11
   749.981 ( 0.032 ms): systemd-oomd/1151 openat(dfd: CWD, filename: "/proc/meminfo", flags: RDONLY|CLOEXEC)    = 11
   775.441 (         ): gnome-terminal/3223 openat(dfd: CWD, filename: "/proc/1244100/cmdline")                ...
   999.988 ( 0.044 ms): systemd-oomd/1151 openat(dfd: CWD, filename: "/sys/fs/cgroup/user.slice/user-1001.slice/user@1001.service/memory.pressure", flags: RDONLY|CLOEXEC) = 11
  1000.091 ( 0.010 ms): systemd-oomd/1151 openat(dfd: CWD, filename: "/sys/fs/cgroup/user.slice/user-1001.slice/user@1001.service/memory.current", flags: RDONLY|CLOEXEC) = 11
[acme@five ~]$