From owner-freebsd-acpi@FreeBSD.ORG Fri Jan 9 09:51:30 2009 Return-Path: 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 ED3CD1065674 for ; Fri, 9 Jan 2009 09:51:30 +0000 (UTC) (envelope-from mav@mavhome.dp.ua) Received: from cmail.optima.ua (cmail.optima.ua [195.248.191.121]) by mx1.freebsd.org (Postfix) with ESMTP id AED038FC2C for ; Fri, 9 Jan 2009 09:51:29 +0000 (UTC) (envelope-from mav@mavhome.dp.ua) X-Spam-Flag: SKIP X-Spam-Yversion: Spamooborona-2.1.0 Received: from orphanage.alkar.net (account mav@alkar.net [212.86.226.11] verified) by cmail.optima.ua (CommuniGate Pro SMTP 5.2.9) with ESMTPA id 231241554; Fri, 09 Jan 2009 10:51:28 +0200 Message-ID: <4967100F.8040303@mavhome.dp.ua> Date: Fri, 09 Jan 2009 10:51:27 +0200 From: Alexander Motin User-Agent: Thunderbird 2.0.0.14 (X11/20080612) MIME-Version: 1.0 To: Gabriel Lavoie References: <1231471393.00057821.1231461001@10.7.7.3> In-Reply-To: <1231471393.00057821.1231461001@10.7.7.3> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Cc: freebsd-acpi@freebsd.org Subject: Re: EST (Enhanced Intel SpeedStep(R) Technology) on amd64 X-BeenThere: freebsd-acpi@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: ACPI and power management development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 09 Jan 2009 09:51:33 -0000 Gabriel Lavoie wrote: > I recently built a small home server using an Inten 45nm E5200 @ > 2.5 GHz. With FreeBSD 7.0, the "est" driver had problems pooling for > the CPU frequency/voltage pairs and automatically disabled itself. It > left the CPU at the frequency the BIOS put it after startup, 1.25 GHz > because I have EIST enabled. I had to manually change the frequency or > use powerd to put it at maximum. Now I upgraded to FreeBSD 7.1 and > everything in my systems seems supported correctly. The est driver now > recognize the CPU and load the correct information. Also, after > bootup, the frequency of the CPU is at max (2.5 GHz). What I would > like is to get the behaviour of EIST found under Windows and Linux > where the CPU is automatically downclocked to 1.25 GHz when the system > isn't under any load, but comes back to 2.5 GHz as soon as there is > some load. I also get this behaviour under Linux on my Core 2 Duo and > I really like it. What I found interesting is that it seems the Intel > 45nm CPUs use under 5W of power when they are idle and EIST > downclocked them. I would really like to take profit of this low power > consumption. I found about "estctrl" on this page > http://www.daemonology.net/freebsd-est/ but it seems outdated and when > I try to build the port, it tells me that it is only supported on the > i386 architecture. Why not amd64? man powerd? -- Alexander Motin