From owner-freebsd-current@FreeBSD.ORG  Fri Nov 19 14:39:10 2010
Return-Path: <owner-freebsd-current@FreeBSD.ORG>
Delivered-To: freebsd-current@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 62D0F1065672;
	Fri, 19 Nov 2010 14:39:10 +0000 (UTC) (envelope-from avg@freebsd.org)
Received: from citadel.icyb.net.ua (citadel.icyb.net.ua [212.40.38.140])
	by mx1.freebsd.org (Postfix) with ESMTP id 60C358FC17;
	Fri, 19 Nov 2010 14:39:08 +0000 (UTC)
Received: from odyssey.starpoint.kiev.ua (alpha-e.starpoint.kiev.ua
	[212.40.38.101])
	by citadel.icyb.net.ua (8.8.8p3/ICyb-2.3exp) with ESMTP id QAA14336;
	Fri, 19 Nov 2010 16:39:07 +0200 (EET) (envelope-from avg@freebsd.org)
Message-ID: <4CE68C0B.1080007@freebsd.org>
Date: Fri, 19 Nov 2010 16:39:07 +0200
From: Andriy Gapon <avg@freebsd.org>
User-Agent: Mozilla/5.0 (X11; U; FreeBSD amd64; en-US;
	rv:1.9.2.12) Gecko/20101029 Lightning/1.0b2 Thunderbird/3.1.6
MIME-Version: 1.0
To: freebsd-acpi@freebsd.org, freebsd-current@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>
In-Reply-To: <4CE533DE.7010401@freebsd.org>
X-Enigmail-Version: 1.1.2
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit
Cc: 
Subject: Re: aperf/mperf
X-BeenThere: freebsd-current@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Discussions about the use of FreeBSD-current
	<freebsd-current.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>, 
	<mailto:freebsd-current-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-current>
List-Post: <mailto:freebsd-current@freebsd.org>
List-Help: <mailto:freebsd-current-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>,
	<mailto:freebsd-current-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 19 Nov 2010 14:39:10 -0000


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.

Ideas?
Thanks!
-- 
Andriy Gapon