From: Peter Zijlstra <peterz@infradead.org>
To: Ingo Molnar <mingo@kernel.org>
Cc: vincent.weaver@maine.edu, jolsa@redhat.com,
torvalds@linux-foundation.org, eranian@google.com,
tglx@linutronix.de, acme@redhat.com, ak@linux.intel.com,
linux-kernel@vger.kernel.org, hpa@zytor.com,
linux-tip-commits@vger.kernel.org
Subject: Re: [tip:perf/core] perf/x86: Use INST_RETIRED.PREC_DIST for cycles: ppp
Date: Tue, 8 Dec 2015 14:27:53 +0100 [thread overview]
Message-ID: <20151208132753.GD6373@twins.programming.kicks-ass.net> (raw)
In-Reply-To: <20151208085707.GC6373@twins.programming.kicks-ass.net>
On Tue, Dec 08, 2015 at 09:57:07AM +0100, Peter Zijlstra wrote:
> On Tue, Dec 08, 2015 at 09:50:26AM +0100, Peter Zijlstra wrote:
> > On Tue, Dec 08, 2015 at 06:36:04AM +0100, Ingo Molnar wrote:
> >
> > > So I checked my NHM box with your latest queue and it now works correctly. Do you
> > > have any idea what the difference is/was?
> >
> > Sadly, no clue :/
> >
> > I went over those patches and cannot find anything that should affect
> > NHM (or <=SNB in fact).
>
> Oh wait, I spoke too soon, the two new patches affect everything with
> PEBS. And esp. the latter one:
>
> lkml.kernel.org/r/1449177740-5422-2-git-send-email-andi@firstfloor.org
>
If that is the patch that makes your NHM go again, then running 2
concurrent perf-top sessions should make it all go dark again.
next prev parent reply other threads:[~2015-12-08 13:28 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-12-01 0:28 [PATCH 1/2] perf, x86: Use INST_RETIRED.TOTAL_CYCLES_PS for cycles:pp for Skylake Andi Kleen
2015-12-01 0:28 ` [PATCH 2/2] x86, perf: Use INST_RETIRED.PREC_DIST for cycles:ppp Andi Kleen
2015-12-01 13:41 ` Peter Zijlstra
2015-12-01 14:54 ` Andi Kleen
2015-12-01 14:55 ` Peter Zijlstra
2015-12-04 11:50 ` [tip:perf/core] perf/x86: Use INST_RETIRED.PREC_DIST for cycles: ppp tip-bot for Andi Kleen
2015-12-06 13:11 ` Ingo Molnar
2015-12-06 22:06 ` Peter Zijlstra
2015-12-07 6:48 ` Ingo Molnar
2015-12-07 10:26 ` Peter Zijlstra
2015-12-07 14:02 ` Arnaldo Carvalho de Melo
2015-12-07 14:12 ` Peter Zijlstra
2015-12-07 13:51 ` Peter Zijlstra
2015-12-08 5:36 ` Ingo Molnar
2015-12-08 8:50 ` Peter Zijlstra
2015-12-08 8:57 ` Peter Zijlstra
2015-12-08 13:27 ` Peter Zijlstra [this message]
2015-12-09 8:29 ` Ingo Molnar
2016-01-06 18:51 ` tip-bot for Andi Kleen
2015-12-01 13:19 ` [PATCH 1/2] perf, x86: Use INST_RETIRED.TOTAL_CYCLES_PS for cycles:pp for Skylake Peter Zijlstra
2015-12-04 11:50 ` [tip:perf/core] perf/x86: " tip-bot for Andi Kleen
2016-01-06 18:51 ` tip-bot for Andi Kleen
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