From: Arnaldo Carvalho de Melo <acme@redhat.com>
To: Stephane Eranian <eranian@google.com>
Cc: Ingo Molnar <mingo@kernel.org>, Borislav Petkov <bp@alien8.de>,
LKML <linux-kernel@vger.kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
"mingo@elte.hu" <mingo@elte.hu>,
"ak@linux.intel.com" <ak@linux.intel.com>,
Jiri Olsa <jolsa@redhat.com>,
"Yan, Zheng" <zheng.z.yan@intel.com>
Subject: Re: [PATCH v2 0/3] perf,x86: add Intel RAPL PMU support
Date: Wed, 16 Oct 2013 14:53:02 -0300 [thread overview]
Message-ID: <20131016175302.GB4100@infradead.org> (raw)
In-Reply-To: <CABPqkBRQcisi8ukhD=6fKMq+iqwM+Qgxd3=jo82EUJB5coXs1A@mail.gmail.com>
Em Wed, Oct 16, 2013 at 03:13:54PM +0200, Stephane Eranian escreveu:
> On Wed, Oct 16, 2013 at 2:46 PM, Ingo Molnar <mingo@kernel.org> wrote:
> > We should also tell user-space that the unit of this counter is 'Joule'.
> >
> > Then things like:
> >
> > perf stat -a -e power/* sleep 1
> >
> > would output, without knowing any RAPL details:
> >
> > 0.20619 Joule power/energy-core
> > 2.42151 Joule power/energy-pkg
> >
> Not sure there is already some support for this in perf stat. Arnaldo?
Nope, there is not, we would have to have some table somewhere with
"event-regexp: unit-string"
> If not that we need another sysfs file to export the unit. Another
> possibility is for perf stat to recognize the power/* and extract the
> unit from the event name. In my example power/joules-cores -> joules.
I.e. you would be encoding the counter unit as the suffix, might as well
call it "power/cores.joules" and use the dot as the separator for the
unit, but would be just a compact form to encode the counter->unit
table.
- Arnaldo
next prev parent reply other threads:[~2013-10-16 17:53 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-10 14:50 [PATCH v2 0/3] perf,x86: add Intel RAPL PMU support Stephane Eranian
2013-10-10 14:50 ` [PATCH v2 1/3] perf: add active_entry list head to struct perf_event Stephane Eranian
2013-10-10 14:50 ` [PATCH v2 2/3] perf,x86: add Intel RAPL PMU support Stephane Eranian
2013-10-10 14:50 ` [PATCH v2 3/3] perf,x86: add RAPL hrtimer support Stephane Eranian
2013-10-10 17:43 ` [PATCH v2 0/3] perf,x86: add Intel RAPL PMU support Andi Kleen
2013-10-10 18:00 ` Borislav Petkov
2013-10-16 12:46 ` Ingo Molnar
2013-10-16 13:13 ` Stephane Eranian
2013-10-16 17:53 ` Arnaldo Carvalho de Melo [this message]
2013-10-16 18:14 ` Stephane Eranian
2013-10-17 8:14 ` Ingo Molnar
2013-10-17 9:07 ` Peter Zijlstra
2013-10-17 9:12 ` Borislav Petkov
2013-10-17 20:09 ` Stephane Eranian
2013-10-22 16:47 ` Stephane Eranian
2013-10-22 22:18 ` Arnaldo Carvalho de Melo
2013-10-23 9:34 ` Stephane Eranian
2013-10-23 14:22 ` Arnaldo Carvalho de Melo
2013-10-23 14:33 ` Stephane Eranian
2013-10-23 7:07 ` Andi Kleen
2013-10-23 9:24 ` Stephane Eranian
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