From: Andi Kleen <ak@linux.intel.com>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Andi Kleen <andi@firstfloor.org>,
acme@kernel.org, jolsa@kernel.org, linux-kernel@vger.kernel.org,
Thomas Gleixner <tglx@linutronix.de>,
x86@kernel.org
Subject: Re: [PATCH 02/10] x86, perf: Support sysfs files depending on SMT status
Date: Mon, 9 May 2016 07:27:41 -0700 [thread overview]
Message-ID: <20160509142741.GI11177@tassilo.jf.intel.com> (raw)
In-Reply-To: <20160509094219.GO3448@twins.programming.kicks-ass.net>
On Mon, May 09, 2016 at 11:42:19AM +0200, Peter Zijlstra wrote:
> On Thu, May 05, 2016 at 04:03:59PM -0700, Andi Kleen wrote:
> > From: Andi Kleen <ak@linux.intel.com>
> >
> > Add a way to show different sysfs events attributes depending on
> > HyperThreading is on or off. This is difficult to determine
> > early at boot, so we just do it dynamically when the sysfs
> > attribute is read.
> >
> > v2:
> > Compute HT status only once in CPU online/offline hooks.
> > v3: Use topology_max_smt_threads()
> > Signed-off-by: Andi Kleen <ak@linux.intel.com>
> > ---
> > arch/x86/events/core.c | 24 ++++++++++++++++++++++++
> > arch/x86/events/perf_event.h | 14 ++++++++++++++
> > include/linux/perf_event.h | 7 +++++++
> > 3 files changed, 45 insertions(+)
> >
>
> Should this not now live in /sys/devices/system/cpu/ ? Thomas?
This would be incompatible to all previous perf tools.
Also not clear why you would want to move such events, just
because they depend on SMT.
-Andi
--
ak@linux.intel.com -- Speaking for myself only
next prev parent reply other threads:[~2016-05-09 14:27 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-05 23:03 Add top down metrics to perf stat Andi Kleen
2016-05-05 23:03 ` [PATCH 01/10] x86: Add topology_max_smt_threads() Andi Kleen
2016-05-06 10:13 ` Peter Zijlstra
2016-05-06 10:47 ` Thomas Gleixner
2016-05-06 17:24 ` [UPDATED PATCH " Andi Kleen
2016-05-07 8:11 ` Thomas Gleixner
2016-05-12 8:07 ` Ingo Molnar
2016-05-05 23:03 ` [PATCH 02/10] x86, perf: Support sysfs files depending on SMT status Andi Kleen
2016-05-09 9:42 ` Peter Zijlstra
2016-05-09 14:27 ` Andi Kleen [this message]
2016-05-09 14:34 ` Peter Zijlstra
2016-05-12 8:05 ` Ingo Molnar
2016-05-05 23:04 ` [PATCH 03/10] x86, perf: Add Top Down events to Intel Core Andi Kleen
2016-05-11 13:23 ` Jiri Olsa
2016-05-11 13:29 ` Peter Zijlstra
2016-05-12 8:10 ` Ingo Molnar
2016-05-05 23:04 ` [PATCH 04/10] x86, perf: Add Top Down events to Intel Atom Andi Kleen
2016-05-05 23:04 ` [PATCH 05/10] x86, perf: Use new topology_max_smt_threads() in HT leak workaround Andi Kleen
2016-05-05 23:04 ` [PATCH 06/10] perf, tools, stat: Avoid fractional digits for integer scales Andi Kleen
2016-05-07 19:10 ` Jiri Olsa
2016-05-07 19:24 ` Andi Kleen
2016-05-11 13:00 ` Jiri Olsa
2016-05-11 16:43 ` Arnaldo Carvalho de Melo
2016-05-20 6:42 ` [tip:perf/urgent] perf " tip-bot for Andi Kleen
2016-05-05 23:04 ` [PATCH 07/10] perf, tools, stat: Scale values by unit before metrics Andi Kleen
2016-05-07 19:14 ` Jiri Olsa
2016-05-10 20:30 ` [tip:perf/core] perf " tip-bot for Andi Kleen
2016-05-05 23:04 ` [PATCH 08/10] perf, tools, stat: Basic support for TopDown in perf stat Andi Kleen
2016-05-05 23:04 ` [PATCH 09/10] perf, tools, stat: Add computation of TopDown formulas Andi Kleen
2016-05-05 23:04 ` [PATCH 10/10] perf, tools, stat: Add extra output of counter values with -vv Andi Kleen
2016-05-12 8:03 ` Jiri Olsa
2016-05-20 0:05 ` Andi Kleen
2016-05-12 7:47 ` Add top down metrics to perf stat Jiri Olsa
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