linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Andrew Steets <asteets@rgmadvisors.com>
To: Ingo Molnar <mingo@elte.hu>
Cc: linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org,
	Peter Zijlstra <a.p.zijlstra@chello.nl>,
	Paul Mackerras <paulus@samba.org>,
	Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Subject: Re: perf: prctl(PR_TASK_PERF_EVENTS_DISABLE) has no effect
Date: Sat, 28 Jan 2012 17:48:08 -0600	[thread overview]
Message-ID: <4F248938.5030507@rgmadvisors.com> (raw)
In-Reply-To: <20120128120151.GA10390@elte.hu>

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.

-Andrew

-- 

---------------------------------------------------------------
This email, along with any attachments, is confidential. If you 
believe you received this message in error, please contact the 
sender immediately and delete all copies of the message.  
Thank you.

  reply	other threads:[~2012-01-28 23:48 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-01-27 17:03 perf: prctl(PR_TASK_PERF_EVENTS_DISABLE) has no effect Andrew Steets
2012-01-27 17:12 ` Peter Zijlstra
2012-01-27 20:06   ` Andrew Steets
2012-01-27 21:34     ` Peter Zijlstra
2012-01-28 12:01 ` Ingo Molnar
2012-01-28 23:48   ` Andrew Steets [this message]
2012-01-29 16:32     ` Ingo Molnar
2012-01-29 17:50       ` Gleb Natapov
2012-01-30  9:52       ` Peter Zijlstra
2012-01-30 10:11         ` Ingo Molnar
2012-01-30 11:01           ` Peter Zijlstra
2012-01-30 11:31             ` Ingo Molnar
2012-01-30 13:45               ` Peter Zijlstra
2012-01-30 13:58                 ` Ingo Molnar
2012-01-30 15:30                 ` Arnaldo Carvalho de Melo
2012-01-30 15:29             ` Arnaldo Carvalho de Melo
2012-02-01 19:03           ` Frederic Weisbecker

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=4F248938.5030507@rgmadvisors.com \
    --to=asteets@rgmadvisors.com \
    --cc=a.p.zijlstra@chello.nl \
    --cc=acme@ghostprotocols.net \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-perf-users@vger.kernel.org \
    --cc=mingo@elte.hu \
    --cc=paulus@samba.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).