From: Borislav Petkov <bp@amd64.org>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>,
linux-kernel@vger.kernel.org, acme@redhat.com, mingo@elte.hu,
robert.richter@amd.com, eric.dumazet@gmail.com,
Andreas Herrmann <andreas.herrmann3@amd.com>
Subject: Re: [BUG] perf: perf sched warning possibly due to clock granularity on AMD
Date: Mon, 6 Feb 2012 21:27:22 +0100 [thread overview]
Message-ID: <20120206202722.GA556@aftab> (raw)
In-Reply-To: <1328547259.2482.11.camel@laptop>
On Mon, Feb 06, 2012 at 05:54:19PM +0100, Peter Zijlstra wrote:
> On Mon, 2012-02-06 at 17:46 +0100, Borislav Petkov wrote:
> > > across all CPUs in the entire system.
> >
> > Right, by the "entire system" you mean consistent across cores and
> > sockets but not necessarily across cabinets, as in the comment above,
> > correct?
> >
> > If so, let me ask around if this holds true too.
>
> Every CPU available to the kernel. So if you run a single system image
> across your cabinets, then yes those too.
Ok, but what about that sentence "(but not across cabinets - we turn
it off in that case explicitly.)" - I don't see any place where it is
turned off explicitly... Maybe a stale comment?
--
Regards/Gruss,
Boris.
Advanced Micro Devices GmbH
Einsteinring 24, 85609 Dornach
GM: Alberto Bozzo
Reg: Dornach, Landkreis Muenchen
HRB Nr. 43632 WEEE Registernr: 129 19551
next prev parent reply other threads:[~2012-02-06 20:28 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-02-06 13:25 [BUG] perf: perf sched warning possibly due to clock granularity on AMD Stephane Eranian
2012-02-06 14:26 ` Peter Zijlstra
2012-02-06 14:31 ` Stephane Eranian
2012-02-06 17:17 ` Arnaldo Carvalho de Melo
2012-02-06 15:34 ` Borislav Petkov
2012-02-06 16:37 ` Peter Zijlstra
2012-02-06 16:46 ` Borislav Petkov
2012-02-06 16:54 ` Peter Zijlstra
2012-02-06 20:27 ` Borislav Petkov [this message]
2012-02-06 20:31 ` Peter Zijlstra
2012-02-06 20:37 ` Borislav Petkov
2012-02-06 21:19 ` Venki Pallipadi
2012-02-07 7:51 ` Peter Zijlstra
2012-02-07 8:32 ` Ingo Molnar
2012-02-07 9:06 ` Borislav Petkov
2012-02-07 9:50 ` Ingo Molnar
2012-02-07 12:08 ` [PATCH] x86, AMD: Set sched_clock_stable Borislav Petkov
2012-02-15 15:30 ` Peter Zijlstra
2012-02-07 19:43 ` [tip:perf/core] x86/sched/perf/AMD: " tip-bot for Borislav Petkov
2012-02-08 15:07 ` [BUG] perf: perf sched warning possibly due to clock granularity on AMD Frederic Weisbecker
2012-02-08 15:10 ` Stephane Eranian
2012-02-08 15:22 ` Frederic Weisbecker
2012-02-08 15:23 ` Stephane Eranian
2012-02-18 16:50 ` [PATCH] perf tools: Fix ordering with unstable tsc Frederic Weisbecker
2012-02-22 15:35 ` Stephane Eranian
2012-02-22 15:39 ` David Ahern
2012-03-05 18:43 ` Frederic Weisbecker
2012-03-14 19:55 ` Arnaldo Carvalho de Melo
2012-03-14 20:07 ` David Ahern
2012-03-22 0:10 ` Frederic Weisbecker
2012-03-22 15:28 ` Arnaldo Carvalho de Melo
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