From owner-freebsd-questions@FreeBSD.ORG Mon Jun 23 22:47:09 2008 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id A2AED106566B for ; Mon, 23 Jun 2008 22:47:09 +0000 (UTC) (envelope-from frank@esperance-linux.co.uk) Received: from mailout.zetnet.co.uk (mailout.zetnet.co.uk [194.247.47.231]) by mx1.freebsd.org (Postfix) with ESMTP id 29E1B8FC22 for ; Mon, 23 Jun 2008 22:47:08 +0000 (UTC) (envelope-from frank@esperance-linux.co.uk) Received: from irwell.zetnet.co.uk ([194.247.47.48] helo=zetnet.co.uk) by mailout.zetnet.co.uk with esmtp (Exim 4.63) (envelope-from ) id 1KAuoS-0007mP-7d; Mon, 23 Jun 2008 23:47:04 +0100 Received: from melon.esperance-linux.co.uk (54-144.adsl.zetnet.co.uk [194.247.54.144]) by zetnet.co.uk (8.14.1/8.14.1/Debian-9) with ESMTP id m5NMl3O4003276; Mon, 23 Jun 2008 23:47:03 +0100 Received: by melon.esperance-linux.co.uk (Postfix, from userid 1001) id 6611DFCA4AF; Mon, 23 Jun 2008 23:46:58 +0100 (BST) Date: Mon, 23 Jun 2008 23:46:58 +0100 From: Frank Shute To: George Hartzell Message-ID: <20080623224658.GA28873@melon.esperance-linux.co.uk> Mail-Followup-To: George Hartzell , freebsd-questions@freebsd.org References: <18527.62508.451095.415706@almost.alerce.com> <8cb6106e0806231218jcbdffa8jec894b7fb31290c4@mail.gmail.com> <18528.3319.352684.890447@almost.alerce.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <18528.3319.352684.890447@almost.alerce.com> User-Agent: Mutt/1.4.2.3i X-Face: *}~{PHnDTzvXPe'wl_-f%!@+r5; VLhb':*DsX%wEOPg\fDrXWQJf|2\,92"DdS%63t*BHDyQ|OWo@Gfjcd72eaN!4%NE{0]p)ihQ1MyFNtWL X-Operating-System: FreeBSD 6.3-RELEASE-p2 i386 X-Organisation: 'Esperance Linux' X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-3.0 (zetnet.co.uk [194.247.46.1]); Mon, 23 Jun 2008 23:47:04 +0100 (BST) Cc: freebsd-questions@freebsd.org Subject: Re: CPU temp's on core 2 duo, should they be significantly different? X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: Frank Shute List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 23 Jun 2008 22:47:09 -0000 On Mon, Jun 23, 2008 at 01:52:07PM -0700, George Hartzell wrote: > > Josh Carroll writes: > > [...] > > I'd recommend taking the heat sink off and seeing how the thermal > > grease is spread on the CPU's head spreader and on the heatsink > > itself. If it looks lopsided or extremely thick on one side of the CPU > > package or extremely thin (to the point where you can still see the > > sheen of the heatsink or heat spreader), then re-mount the heatsink > > and try to make sure it's evenly distributing the pressure down on the > > CPU package. > > This is a Shuttle XPC box. I pulled the heatsink/cooler assembly and > there didn't seem to be any obvious asymmetries in how the the grease > was distributed. I swirled it around a bit, reassembled, and am > seeing the same kind of spreads. > > Here's the machine pretty much idle > > dev.cpu.0.temperature: 44 > dev.cpu.1.temperature: 28 > > Where top says: > > last pid: 1217; load averages: 0.02, 0.51, 0.43 up 0+00:14:57 13:49:47 > 52 processes: 1 running, 51 sleeping > CPU: 0.0% user, 0.0% nice, 0.0% system, 0.2% interrupt, 99.8% idle > Mem: 22M Active, 13M Inact, 95M Wired, 1788K Cache, 15M Buf, 3797M Free > Swap: 4063M Total, 4063M Free My top on 7.0 says "CPU states:" not "CPU:" Are you sure you're running on 2 cores? dmesg will tell you and top will have a "C" column with 0 or 1 in it. If you're running on one core, it will explain the temperature discrepancy. > > A could of dd if=/dev/urandom etc... quickly pushes it up, but the > delta remains: > > dev.cpu.0.temperature: 51 > dev.cpu.1.temperature: 39 > > Top says: > > last pid: 1243; load averages: 0.98, 0.65, 0.48 up 0+00:16:07 13:50:57 > 54 processes: 3 running, 51 sleeping > CPU: 0.4% user, 0.0% nice, 92.5% system, 0.0% interrupt, 7.1% idle > Mem: 22M Active, 13M Inact, 95M Wired, 1788K Cache, 15M Buf, 3797M Free > Swap: 4063M Total, 4063M Free > -- Frank Contact info: http://www.shute.org.uk/misc/contact.html