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I am trying to collect some data using perf, but whenever I try perf, I get the "You may not have permission to collect stats.", error.

I have tried changing the /proc/sys/kernel/perf_event_paranoid value to -1; but each time it miraculously resets to "3".

I am using Ubuntu 18.04 LTS.

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It turned out, for some reason the system just didn't want me to change the kernel.perf_event_paranoid, while in session.

So I ran

sudo sh -c 'echo kernel.perf_event_paranoid=1 > /etc/sysctl.d/local.conf'

and rebooted the system and now it works like a charm.

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