Messages in this thread | | | Date | Sun, 29 Jan 2012 17:32:35 +0100 | From | Ingo Molnar <> | Subject | Re: perf: prctl(PR_TASK_PERF_EVENTS_DISABLE) has no effect |
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* Andrew Steets <asteets@rgmadvisors.com> wrote:
> On 1/28/12 6:01 AM, Ingo Molnar wrote: > > >> prctl(PR_TASK_PERF_EVENTS_DISABLE) doesn't appear to > >> disable perf event counters. Here is a demonstration > >> program: > > > > btw., what's your usecase? > > I'm trying to profile a small section of a long-running > program. I ran into trouble using call-graph recording and I > thought this might be an alternative way of getting what I was > after.
That usecase indeed makes sense. Peter, could we allow this for privileged tasks, depending on the perf_paranoia settings or such?
Thanks,
Ingo
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