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Date: Wed, 13 Nov 2013 00:22:49 +0100
From: Ingo Molnar <mingo@kernel.org>
To: Arnaldo Carvalho de Melo <acme@infradead.org>
Cc: linux-kernel@vger.kernel.org, David Ahern <dsahern@gmail.com>,
        Namhyung Kim <namhyung@kernel.org>, Jiri Olsa <jolsa@redhat.com>,
        Adrian Hunter <adrian.hunter@intel.com>,
        =?iso-8859-1?Q?Fr=E9d=E9ric?= Weisbecker <fweisbec@gmail.com>
Subject: perf top -u <uid> does not seem to be working
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Hm, this is unexpected I think:

  hubble:~> perf top --stdio -u mingo
  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

  hubble:~> cat /proc/sys/kernel/perf_event_paranoid 
  -1

  hubble:~> perf top --stdio -u
     Error: switch `u' requires a value

   usage: perf top [<options>]

      -u, --uid <user>      user to profile

(perf is the latest version from tip:perf/core)

Thanks,

	Ingo