From owner-freebsd-smp Thu Apr 27 7: 3:22 2000 Delivered-To: freebsd-smp@freebsd.org Received: from fw.wintelcom.net (ns1.wintelcom.net [209.1.153.20]) by hub.freebsd.org (Postfix) with ESMTP id 14C4E37B734 for ; Thu, 27 Apr 2000 07:03:20 -0700 (PDT) (envelope-from bright@fw.wintelcom.net) Received: (from bright@localhost) by fw.wintelcom.net (8.10.0/8.10.0) id e3REWkm27894; Thu, 27 Apr 2000 07:32:46 -0700 (PDT) Date: Thu, 27 Apr 2000 07:32:46 -0700 From: Alfred Perlstein To: Dave Boers Cc: freebsd-smp@FreeBSD.ORG Subject: Re: hlt instructions and temperature issues Message-ID: <20000427073245.J489@fw.wintelcom.net> References: <20000427142613.A7795@relativity.student.utwente.nl> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 1.0.1i In-Reply-To: <20000427142613.A7795@relativity.student.utwente.nl>; from djb@ifa.au.dk on Thu, Apr 27, 2000 at 02:26:13PM +0200 Sender: owner-freebsd-smp@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org * Dave Boers [000427 05:57] wrote: > Not being a kernel programmer, I have the following question. If it is a > dumb question, please excuse me, but I still need an answer :-) > > I have noticed that the difference in processor temperatures between idle > and full load on Abit BP6 dual celeron systems is much less for FreeBSD (2 > degrees celcius) than it is for Linux (13 degrees Celcius). Also overall > system temperature seems to be much higher using FreeBSD than Linux. I have > two Abit BP6 boxes sitting here, one running FreeBSD, the other Linux. The > Linux box is 30 degrees celcius while the FreeBSD one is 50 degrees > Celcius. > > So my question is, is FreeBSD issuing hlt instructions when the cpu's are > idle or not? Might this explain the difference between Linux and FreeBSD? http://www.freebsd.org/FAQ/misc.html#AEN3892 -Alfred To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-smp" in the body of the message