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From: Peter Zijlstra <a.p.zijlstra@chello.nl>
To: Ingo Molnar <mingo@elte.hu>
Cc: "Frédéric Weisbecker" <fweisbec@gmail.com>,
	"Andrew Steets" <asteets@rgmadvisors.com>,
	linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org,
	"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: Mon, 30 Jan 2012 12:01:33 +0100	[thread overview]
Message-ID: <1327921293.2446.202.camel@twins> (raw)
In-Reply-To: <20120130101121.GB8924@elte.hu>

On Mon, 2012-01-30 at 11:11 +0100, Ingo Molnar wrote:
> So, what workflow are you suggesting to Andrew?

Librarize perf record, then in your code do something like:

#include "perf_record.h"

  handle = perf_record_init(); /* creates perf events and creates
                                  a record thread that writes samples
                                  to perf.data, consumes env(PERF_*)
                                  for configuration, registers with
                                  at_exit() for cleanup */
  if (!handle)
    /* burn */

  /* do you other code */

  perf_record_start(handle);

  /* do the bit you want profiled */

  perf_record_stop(handle);

Then build with -lperfrecord or so. Not too hard, right?

  reply	other threads:[~2012-01-30 11:01 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
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 [this message]
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

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