perf have no permission to collect stats

Asked Dec 27 '17 at 12:18

Active Dec 27 '17 at 12:53

Viewed 1.3k times

When I use perf to collect system stats, like this

sudo perf record -a -g -F 997 -p pid sleep 30

then I got

Error:
You may not have permission to collect stats.
Consider tweaking /proc/sys/kernel/perf_event_paranoid:
 -1 - Not paranoid at all
  0 - Disallow raw tracepoint access for unpriv
  1 - Disallow cpu events for unpriv
  2 - Disallow kernel profiling for unpriv

I have no permission to modify /proc/sys/kernel/perf_event_paranoid, even in root. I try to add "kernal.perf_event_paranoid=-1" into /etc/sysctl.conf, and use

sysctl -p

to reload params. Again I have no permission to load param kernal.perf_event_paranoid.

How can I use perf to collect stats?

edited Dec 27 '17 at 12:53

Patryk Brejdak

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asked Dec 27 '17 at 12:18

bloomstar

2

See https://superuser.com/questions/980632/run-perf-without-root-rights for modifying `perf_event_paranoid`. – Zulan Dec 27 '17 at 13:33
1

Is there a misprint in "kernal.perf_event_paranoid=-1" parameter name? – osgx Mar 10 '18 at 01:07
2

Note that I'm seeing this even with `perf_event_paranoid = -1` – Craig Ringer Apr 10 '19 at 05:09
Did you try `sysctl -p` with `sudo`? – Özgür Murat Sağdıçoğlu Mar 12 '22 at 10:40

perf have no permission to collect stats

0 Answers0