lkml.org 
[lkml]   [2012]   [Jan]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: perf: prctl(PR_TASK_PERF_EVENTS_DISABLE) has no effect

* 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


\
 
 \ /
  Last update: 2012-01-29 17:35    [W:0.075 / U:0.352 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site