From owner-freebsd-acpi@FreeBSD.ORG  Fri Nov 19 19:08:51 2010
Return-Path: <owner-freebsd-acpi@FreeBSD.ORG>
Delivered-To: freebsd-acpi@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 6603E106566B;
	Fri, 19 Nov 2010 19:08:51 +0000 (UTC) (envelope-from nate@root.org)
Received: from mail.root.org (root.org [208.72.84.34])
	by mx1.freebsd.org (Postfix) with ESMTP id 3F8E88FC0C;
	Fri, 19 Nov 2010 19:08:51 +0000 (UTC)
Received: from [10.0.5.50] (ppp-71-139-7-59.dsl.snfc21.pacbell.net
	[71.139.7.59]) by mail.root.org (Postfix) with ESMTP id 656AD615C;
	Fri, 19 Nov 2010 19:08:49 +0000 (UTC)
Message-ID: <4CE6CB3E.70009@root.org>
Date: Fri, 19 Nov 2010 11:08:46 -0800
From: Nate Lawson <nate@root.org>
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US;
	rv:1.9.2.12) Gecko/20101027 Thunderbird/3.1.6
MIME-Version: 1.0
To: Andriy Gapon <avg@freebsd.org>
References: <4CE29718.2050508@freebsd.org>	<D1DB20AD-779E-469B-BFFA-C0BA1A249858@neville-neil.com>	<4CE51CDA.6010202@freebsd.org>	<AANLkTimcJFL8Y47mTznKz72w0z5+Voc9oWrz92kE+wQa@mail.gmail.com>	<4CE533DE.7010401@freebsd.org>
	<4CE68C0B.1080007@freebsd.org>
In-Reply-To: <4CE68C0B.1080007@freebsd.org>
X-Enigmail-Version: 1.1.1
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit
Cc: freebsd-acpi@freebsd.org, freebsd-current@freebsd.org
Subject: Re: aperf/mperf
X-BeenThere: freebsd-acpi@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: ACPI and power management development <freebsd-acpi.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-acpi>,
	<mailto:freebsd-acpi-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-acpi>
List-Post: <mailto:freebsd-acpi@freebsd.org>
List-Help: <mailto:freebsd-acpi-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-acpi>,
	<mailto:freebsd-acpi-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 19 Nov 2010 19:08:51 -0000

On 11/19/2010 6:39 AM, Andriy Gapon wrote:
> 
> I am thinking about providing two APIs for this.
> 
> 1. KPI
> void cpu_get_a_m_perf(u_int cpu, uint64_t *aperf, uint64_t *mperf);
> 
> 2. Userland
> sysctl dev.cpu.N.aperf_mperf that returns two UQUAD values.
> 
> But I am not sure where to put the code for both APIs.
> Adding another device under cpu seems like an overkill.

These can be exported as a common interface from cpufreq
(dev,cpu.X.perf_stats) and supplied by the child acpi_perf driver on
each cpu.

-- 
Nate