From owner-freebsd-questions Thu Jan 9 3:24:19 2003 Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 2C08F37B401 for ; Thu, 9 Jan 2003 03:24:18 -0800 (PST) Received: from www.fastmail.fm (www.fastmail.fm [66.111.4.2]) by mx1.FreeBSD.org (Postfix) with ESMTP id 83AF143F43 for ; Thu, 9 Jan 2003 03:24:16 -0800 (PST) (envelope-from judmarc@fastmail.fm) Received: from www.fastmail.fm (localhost [127.0.0.1]) by localhost.localdomain (Postfix) with ESMTP id B74DE2E72; Thu, 9 Jan 2003 06:23:59 -0500 (EST) Received: from 127.0.0.1 ([127.0.0.1] helo=www.fastmail.fm) by fastmail.fm with SMTP; Thu, 09 Jan 2003 06:23:59 -0500 X-Epoch: 1042111439 X-Sasl-enc: aT/O5qLw7GifXVs0tWq9SA Received: from sparky (dialup-209.246.210.84.Dial1.Philadelphia1.Level3.net [209.246.210.84]) by www.fastmail.fm (Postfix) with ESMTP id C95231A0D0; Thu, 9 Jan 2003 06:23:57 -0500 (EST) MIME-Version: 1.0 To: Matthew Seaman , questions@FreeBSD.ORG Subject: Re: FreeBSD and AMD power management References: <20030108232002.G61746-100000@whitetower.gambrl01.md.comcast.net> <20030109085442.GA10394@happy-idiot-talk.infracaninophi> Message-ID: Content-Type: text/plain; charset=utf-8; format=flowed From: Jud Date: Thu, 09 Jan 2003 06:24:53 -0500 In-Reply-To: <20030109085442.GA10394@happy-idiot-talk.infracaninophi> User-Agent: Opera7.0/Win32 M2 BETA2 build 2591 Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG On Thu, 9 Jan 2003 08:54:42 +0000, Matthew Seaman wrote: > On Wed, Jan 08, 2003 at 11:29:11PM -0500, J. Seth Henry wrote: >> I have noticed that my Compaq IA-1's (AMD K6-2/266 & VIA chipset) run >> substantially hotter under FreeBSD than under Linux. I didn't realize >> just >> how much until the machines began spontaneously rebooting under load. [snip] >> It doesn't appear to be a kernel panic - this machine has a thermal >> protection circuit which will hold the system in reset if it gets too >> warm, and so far, nothing has shown up in the logs (beyond the usual >> startup message regarding / being unmounted improperly). This leads me >> to >> believe that FreeBSD isn't issuing halts when it is idle, or the CPU is >> simply "idle" less. I have noticed that FreeBSD accesses the microdrive >> a >> *lot* (though Linux may be as well, but I can't hear it because it's >> running from flash) > > Try the ports/sysutils/fvcool port --- > http://www.nt.phys.kyushu-u.ac.jp/shimizu/ > > Using it has cut the average CPU temperature on my system from about > 70C to about 50C. I don't know if including options CPU_SUSP_HLT in your kernel will help fvcool work even better, but you might try it. I was using CPU_SUSP_HLT in my kernel; adding fvcool drops the average temp of my XP1800+ from 50C to 36C. The other thing to do, depending on whether you can take the machines offline (how many are there?), is to get a better heatsink and fan properly mounted on the CPU, and determine whether you can improve internal ventilation with case fans. -- Jud To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message