From owner-freebsd-current@FreeBSD.ORG Wed Oct 6 06:48:31 2010 Return-Path: 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 117581065670 for ; Wed, 6 Oct 2010 06:48:31 +0000 (UTC) (envelope-from alexander@kojevnikov.com) Received: from mail-qy0-f182.google.com (mail-qy0-f182.google.com [209.85.216.182]) by mx1.freebsd.org (Postfix) with ESMTP id CE0FF8FC0C for ; Wed, 6 Oct 2010 06:48:30 +0000 (UTC) Received: by qyk35 with SMTP id 35so3908622qyk.13 for ; Tue, 05 Oct 2010 23:48:30 -0700 (PDT) Received: by 10.224.36.207 with SMTP id u15mr8960016qad.317.1286347710047; Tue, 05 Oct 2010 23:48:30 -0700 (PDT) MIME-Version: 1.0 Received: by 10.220.84.73 with HTTP; Tue, 5 Oct 2010 23:48:09 -0700 (PDT) In-Reply-To: <201010060718.39137.bruce@cran.org.uk> References: <201010060718.39137.bruce@cran.org.uk> From: Alexander Kojevnikov Date: Wed, 6 Oct 2010 17:48:09 +1100 Message-ID: To: freebsd-current@freebsd.org Content-Type: text/plain; charset=UTF-8 Cc: Bruce Cran , spawk@acm.poly.edu Subject: Re: sysctl debug.cpufreq.highest X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 06 Oct 2010 06:48:31 -0000 On 6 October 2010 17:18, Bruce Cran wrote: > On Wednesday 06 October 2010 03:02:36 Alexander Kojevnikov wrote: > >> This variable allows to underclock the CPU, which is useful when >> building quiet or low-power systems. > > You can use the new -m and -M switches to powerd to control the minimum and > maximum frequencies instead. Thanks Bruce, now I have a good reason to upgrade to CURRENT :) Still, it would be nice to have debug.cpufreq.highest exposed via sysctl. Especially considering that the patch is quite short and straightforward.