linux-kernel - Re: perf: prctl(PR_TASK_PERF_EVENTS

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <4F248938.5030507@rgmadvisors.com>
Date:	Sat, 28 Jan 2012 17:48:08 -0600
From:	Andrew Steets <asteets@...advisors.com>
To:	Ingo Molnar <mingo@...e.hu>
CC:	linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Paul Mackerras <paulus@...ba.org>,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>
Subject: Re: perf: prctl(PR_TASK_PERF_EVENTS_DISABLE) has no effect

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.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/