From: Frederic Weisbecker <fweisbec@gmail.com>
To: Arjan van de Ven <arjan@infradead.org>
Cc: linux-kernel@vger.kernel.org, mingo@elte.hu,
peterz@infradead.org, Prasad <prasad@linux.vnet.ibm.com>
Subject: Re: [RFC PATCH] perf_core: provide a kernel-internal interface to get to performance counters
Date: Fri, 25 Sep 2009 12:44:24 +0200 [thread overview]
Message-ID: <20090925104423.GB6467@nowhere> (raw)
In-Reply-To: <20090925122556.2f8bd939@infradead.org>
On Fri, Sep 25, 2009 at 12:25:56PM +0200, Arjan van de Ven wrote:
> From 5db5cd76f3c16c9f6093f54d1ccfb97d04b9a1ca Mon Sep 17 00:00:00 2001
> From: Arjan van de Ven <arjan@linux.intel.com>
> Date: Fri, 25 Sep 2009 12:20:57 +0200
> Subject: [PATCH] perf_core: provide a kernel-internal interface to get to performance counters
>
> There are reasons for kernel code to ask for, and use, performance counters.
> For example, in CPU freq governors this tends to be a good idea, but there
> are other examples possible as well of course.
>
> This patch adds the needed bits to do enable this functionality; they have been
> tested in an experimental cpufreq driver that I'm working on, and the changes
> are all that I needed to access counters properly.
>
> Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Sounds like a very good idea. I have that as an ad-hoc part in the
hw-breakpoint patchset. This patch would help me drop this part
and use such unified in-kernel users interface.
Frederic.
next prev parent reply other threads:[~2009-09-25 10:44 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-09-25 10:25 [RFC PATCH] perf_core: provide a kernel-internal interface to get to performance counters Arjan van de Ven
2009-09-25 10:44 ` Frederic Weisbecker [this message]
2009-09-25 11:42 ` Peter Zijlstra
2009-09-26 16:03 ` Frank Ch. Eigler
2009-09-26 16:11 ` Arjan van de Ven
2009-09-26 16:20 ` Frank Ch. Eigler
2009-09-26 18:32 ` K.Prasad
2009-09-26 18:48 ` Arjan van de Ven
2009-10-01 7:25 ` Ingo Molnar
2009-10-01 8:16 ` K.Prasad
2009-10-01 8:53 ` Ingo Molnar
2009-10-01 10:01 ` K.Prasad
2009-10-01 10:28 ` Ingo Molnar
2009-10-04 22:28 ` Frederic Weisbecker
2009-10-05 9:55 ` Ingo Molnar
2009-10-05 10:13 ` Frédéric Weisbecker
2009-10-05 7:53 ` Peter Zijlstra
2009-10-05 8:55 ` Ingo Molnar
2009-10-05 9:24 ` Frédéric Weisbecker
2009-10-05 9:48 ` Ingo Molnar
2009-10-05 10:08 ` Frédéric Weisbecker
2009-11-21 13:36 ` [tip:perf/core] perf/core: Provide " tip-bot for Arjan van de Ven
2010-02-05 15:47 ` [RFC PATCH] perf_core: provide " Christoph Hellwig
2010-02-05 17:59 ` john smith
2010-02-06 6:24 ` Arjan van de Ven
2010-02-06 11:46 ` Frederic Weisbecker
2010-02-06 14:18 ` Peter Zijlstra
2010-02-06 16:08 ` Frederic Weisbecker
2010-02-07 17:01 ` Ingo Molnar
2010-01-25 5:10 john smith
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