From: Peter Zijlstra <peterz@infradead.org>
To: Zhang Rui <rui.zhang@intel.com>
Cc: "Lin, Ming M" <ming.m.lin@intel.com>, Ingo Molnar <mingo@elte.hu>,
Matt Fleming <matt@console-pimps.org>,
Frederic Weisbecker <fweisbec@gmail.com>,
lkml <linux-kernel@vger.kernel.org>,
Arnaldo Carvalho de Melo <acme@redhat.com>
Subject: Re: [RFC PATCH 2/2] perf stat: Use event group to simulate PMI on PMI-less hardware counter
Date: Thu, 11 Nov 2010 13:46:41 +0100 [thread overview]
Message-ID: <1289479601.2084.76.camel@laptop> (raw)
In-Reply-To: <1289440836.8148.1365.camel@rui>
On Thu, 2010-11-11 at 10:00 +0800, Zhang Rui wrote:
> Well, the RAPL package energy perf event may need this piece of code.
>
> "MSR_PKG_ENERGY_STATUS is a read-only MSR. It reports the actual energy
> use for the package domain. This MSR is updated every ~1msec. It has a
> wraparound time of around 60 secs when power consumption is high, and
> may be longer otherwise."
>
> As it's an energy counter, we should show it in "perf stat", right?
> As it doesn't have interrupt, I want to schedule a timer interrupt every
> 30s to update the event counter.
So use a timer inside the RAPL pmu driver. No need to change the
interface or add generic code.
next prev parent reply other threads:[~2010-11-11 12:46 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-10 6:15 [RFC PATCH 2/2] perf stat: Use event group to simulate PMI on PMI-less hardware counter Lin Ming
2010-11-10 12:21 ` Peter Zijlstra
2010-11-10 14:45 ` Lin Ming
2010-11-10 14:53 ` Peter Zijlstra
2010-11-10 15:06 ` Lin Ming
2010-11-10 15:08 ` Peter Zijlstra
2010-11-10 15:17 ` Matt Fleming
2010-11-11 2:00 ` Zhang Rui
2010-11-11 12:46 ` Peter Zijlstra [this message]
2010-11-12 0:32 ` Zhang Rui
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