From: Peter Zijlstra <a.p.zijlstra@chello.nl>
To: mingo@kernel.org, hpa@zytor.com, linux-kernel@vger.kernel.org,
tglx@linutronix.de, jolsa@redhat.com
Cc: linux-tip-commits@vger.kernel.org
Subject: Re: [tip:perf/core] Revert "sched, perf: Use a single callback into the scheduler"
Date: Wed, 23 May 2012 18:33:54 +0200 [thread overview]
Message-ID: <1337790834.9783.30.camel@laptop> (raw)
In-Reply-To: <tip-ab0cce560ef177bdc7a8f73e9962be9d829a7b2c@git.kernel.org>
On Wed, 2012-05-23 at 09:09 -0700, tip-bot for Jiri Olsa wrote:
> > I rather liked we could do away with both that black-spot and
> > clean up the code a little, but apparently people rely on it.
>
Ingo noted that inherited counters already are active over the context
switch (due to the lazy switch optimization) and thus profile the
context switch cost.
Regular per-task counters not including this are therefore not
consistent.
So it would be good to find a way to fix the tracing fallout
differently. A well..
prev parent reply other threads:[~2012-05-23 16:33 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-21 8:06 [RFC][BUG] Revert "sched, perf: Use a single callback into the scheduler" Jiri Olsa
2012-05-22 11:01 ` Peter Zijlstra
2012-05-23 11:13 ` [PATCH] " Jiri Olsa
2012-05-23 16:09 ` [tip:perf/core] " tip-bot for Jiri Olsa
2012-05-23 16:33 ` Peter Zijlstra [this message]
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