From: Peter Zijlstra <peterz@infradead.org>
To: Ingo Molnar <mingo@kernel.org>
Cc: Stephane Eranian <eranian@google.com>,
LKML <linux-kernel@vger.kernel.org>, Jiri Olsa <jolsa@redhat.com>,
"mingo@elte.hu" <mingo@elte.hu>, David Ahern <dsahern@gmail.com>,
"ak@linux.intel.com" <ak@linux.intel.com>,
Arnaldo Carvalho de Melo <acme@redhat.com>,
Namhyung Kim <namhyung.kim@lge.com>
Subject: Re: [BUG] perf stat: explicit grouping yields unexpected results
Date: Fri, 15 Nov 2013 11:05:06 +0100 [thread overview]
Message-ID: <20131115100506.GD2965@twins.programming.kicks-ass.net> (raw)
In-Reply-To: <20131115063457.GB12442@gmail.com>
On Fri, Nov 15, 2013 at 07:34:57AM +0100, Ingo Molnar wrote:
> Btw., does the kernel side currently support discovery of such
> impossible group scheduling constraints at group setup time?
Up to a point.
> If not
> then it probably should and it should reject them straight away.
We do I think, for the case where its obvious it can never fit.
That said, if you have a pinned cpu event, it all comes apart.
next prev parent reply other threads:[~2013-11-15 10:05 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-11-14 20:50 [BUG] perf stat: explicit grouping yields unexpected results Stephane Eranian
2013-11-15 6:34 ` Ingo Molnar
2013-11-15 9:24 ` Stephane Eranian
2013-11-15 10:34 ` Ingo Molnar
2013-11-15 10:41 ` Stephane Eranian
2013-11-15 10:50 ` Peter Zijlstra
2013-11-15 11:52 ` Peter Zijlstra
2013-11-15 11:58 ` Stephane Eranian
2013-11-17 3:41 ` Andi Kleen
2013-11-29 13:33 ` Jiri Olsa
2013-11-29 13:43 ` Stephane Eranian
2013-11-29 13:52 ` Jiri Olsa
2013-11-29 14:01 ` Stephane Eranian
2013-12-02 15:23 ` Andi Kleen
2013-12-03 2:52 ` Stephane Eranian
2013-12-03 23:44 ` Andi Kleen
2013-11-15 10:05 ` Peter Zijlstra [this message]
2013-11-15 10:13 ` Stephane Eranian
2013-11-15 10:49 ` Peter Zijlstra
2013-11-15 15:08 ` Vince Weaver
2013-11-15 22:52 ` Stephane Eranian
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