From: Peter Zijlstra <peterz@infradead.org>
To: Stephane Eranian <eranian@google.com>
Cc: Arnaldo Carvalho de Melo <acme@infradead.org>,
linux-kernel@vger.kernel.org, mingo@elte.hu, paulus@samba.org,
davem@davemloft.net, fweisbec@gmail.com,
perfmon2-devel@lists.sf.net, eranian@gmail.com
Subject: Re: [RFC] perf/perf_events: misleading number of samples due to mmap()
Date: Wed, 16 Jun 2010 16:52:42 +0200 [thread overview]
Message-ID: <1276699962.1745.599.camel@laptop> (raw)
In-Reply-To: <AANLkTikvExLi_MahU3kkX1TQKvBODq8SyTSXgpyAjOay@mail.gmail.com>
On Wed, 2010-06-16 at 16:40 +0200, Stephane Eranian wrote:
> This leads me to another point. For per-thread sampling, why
> do we need to record mmap() events happening *outside* of
> the process? I can understand the exception of kernel modules.
How does that happen? The per-thread events should be on the per-task
context, so another task's mmap() events should never end up there.
next prev parent reply other threads:[~2010-06-16 14:53 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-06-16 14:40 [RFC] perf/perf_events: misleading number of samples due to mmap() Stephane Eranian
2010-06-16 14:52 ` Peter Zijlstra [this message]
2010-06-16 16:41 ` stephane eranian
2010-06-16 17:15 ` stephane eranian
2010-06-16 17:43 ` Peter Zijlstra
2010-06-16 14:54 ` Peter Zijlstra
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