From: Peter Zijlstra <peterz@infradead.org>
To: Tim Blechmann <tim@klingt.org>
Cc: linux-kernel@vger.kernel.org, mingo@elte.hu
Subject: Re: pref record question
Date: Tue, 20 Oct 2009 06:26:50 +0200 [thread overview]
Message-ID: <1256012810.17774.17.camel@laptop> (raw)
In-Reply-To: <4ADC9C2A.5020707@klingt.org>
On Mon, 2009-10-19 at 19:04 +0200, Tim Blechmann wrote:
> i am trying to do some profiling with perf (2.6.31.4). while
> thread-level profiling works fine, i haven't been able to record
> profiling data of a whole process (i.e. main thread + child threads).
> from my understanding, this should be enabled by running 'perf record
> -i' on the main thread. this does only collect the data from the main
> thread, though.
>
> is this an issue with perf or with my understanding of perf?
-i will only inherit the counters on new fork()/clone() calls, so an
existing process/task tree will not automagically get the counters.
next prev parent reply other threads:[~2009-10-20 4:26 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-10-19 17:04 Tim Blechmann
2009-10-20 4:26 ` Peter Zijlstra [this message]
2009-10-20 6:00 ` Ingo Molnar
2009-10-20 9:19 ` Peter Zijlstra
2009-10-20 12:46 ` Ingo Molnar
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