From: Peter Zijlstra <peterz@infradead.org>
To: Stephane Eranian <eranian@google.com>
Cc: Andi Kleen <ak@linux.intel.com>,
LKML <linux-kernel@vger.kernel.org>,
"mingo@elte.hu" <mingo@elte.hu>,
Arnaldo Carvalho de Melo <acme@redhat.com>,
Jiri Olsa <jolsa@redhat.com>
Subject: Re: [PATCH v2 1/2] perf tools: add event modifier to request exclusive PMU access
Date: Mon, 22 Oct 2012 17:59:25 +0200 [thread overview]
Message-ID: <1350921565.2768.105.camel@twins> (raw)
In-Reply-To: <CABPqkBTeuD==RY9xORYyUhtZm0cXAFw7FEPocMsdCbcqTUS3bg@mail.gmail.com>
On Mon, 2012-10-22 at 17:44 +0200, Stephane Eranian wrote:
>
> I know the answer, because I know what's going on under the
> hood. But what about the average user?
I'm still wondering if the avg user really thinks 'instructions' is a
useful metric for other than obtaining ipc measurements.
The avg user wants time domain measurements, like what's the most
expensive function, or most expensive cache-miss etc..
next prev parent reply other threads:[~2012-10-22 16:00 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-22 13:20 [PATCH v2 0/2] perf: enforce exclusive PMU access for SNB INST_RETIRED:PREC_DIST Stephane Eranian
2012-10-22 13:20 ` [PATCH v2 1/2] perf tools: add event modifier to request exclusive PMU access Stephane Eranian
2012-10-22 13:53 ` Andi Kleen
2012-10-22 14:55 ` Stephane Eranian
2012-10-22 15:39 ` Andi Kleen
2012-10-22 15:44 ` Stephane Eranian
2012-10-22 15:59 ` Peter Zijlstra [this message]
2012-10-22 16:08 ` Stephane Eranian
2012-10-22 17:08 ` Peter Zijlstra
2012-10-22 13:20 ` [PATCH v2 2/2] perf: enforce SNB exclusive access for INST_RETIRED:PREC_DIST Stephane Eranian
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