From owner-freebsd-questions@FreeBSD.ORG Fri Jul 18 09:54:01 2014 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 6CB0110B for ; Fri, 18 Jul 2014 09:54:01 +0000 (UTC) Received: from smtpb.telissant.net (smtpb.telissant.net [199.233.230.156]) by mx1.freebsd.org (Postfix) with ESMTP id 3F05E2044 for ; Fri, 18 Jul 2014 09:54:00 +0000 (UTC) Received: from barrida.3dresearch.com (localhost [127.0.0.1]) by smtpb.telissant.net (Postfix) with ESMTP id 0849327309 for ; Fri, 18 Jul 2014 05:54:00 -0400 (EDT) X-Virus-Scanned: amavisd-new at telissant.net Received: from smtpb.telissant.net ([127.0.0.1]) by barrida.3dresearch.com (barrida.3dresearch.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id v-AO1nWeL7_1 for ; Fri, 18 Jul 2014 05:53:41 -0400 (EDT) Received: from doncurzio.3dresearch.com (pool-108-3-92-199.pitbpa.east.verizon.net [108.3.92.199]) (using TLSv1 with cipher ADH-CAMELLIA256-SHA (256/256 bits)) (No client certificate requested) by smtpb.telissant.net (Postfix) with ESMTPSA id E4E6F27332 for ; Fri, 18 Jul 2014 05:53:40 -0400 (EDT) Received: from doncurzio.3dresearch.com (localhost [127.0.0.1]) by doncurzio.3dresearch.com (Postfix) with SMTP id 58364A1E47 for ; Fri, 18 Jul 2014 05:53:40 -0400 (EDT) Date: Fri, 18 Jul 2014 05:53:37 -0400 From: Janos Dohanics To: FreeBSD Questions Subject: Re: CPU temperature reading Message-Id: <20140718055337.5f7aab7429cd3f2f454dc74d@3dresearch.com> In-Reply-To: References: <20140717135458.6c3a58d14732798685660928@3dresearch.com> X-Mailer: Sylpheed 3.3.0 (GTK+ 2.24.19; amd64-portbld-freebsd9.1) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 18 Jul 2014 09:54:01 -0000 On Thu, 17 Jul 2014 14:19:44 -0400 Antoine Kallab wrote: > On Thu, Jul 17, 2014 at 1:54 PM, Janos Dohanics > wrote: > > > Hello, > > > > I am getting impossibly low temperature readings on a new system > > running FreeBSD 10.0-STABLE #0 r268555 amd64: > > > > # sysctl -a | grep amdtemp > > dev.amdtemp.%parent: > > dev.amdtemp.0.%desc: AMD CPU On-Die Thermal Sensors > > dev.amdtemp.0.%driver: amdtemp > > dev.amdtemp.0.%location: > > dev.amdtemp.0.%pnpinfo: > > dev.amdtemp.0.%parent: hostb4 > > dev.amdtemp.0.sensor_offset: 0 > > dev.amdtemp.0.core0.sensor0: 17.2C > > dev.amdtemp.1.%desc: AMD CPU On-Die Thermal Sensors > > dev.amdtemp.1.%driver: amdtemp > > dev.amdtemp.1.%location: > > dev.amdtemp.1.%pnpinfo: > > dev.amdtemp.1.%parent: hostb10 > > dev.amdtemp.1.sensor_offset: 0 > > dev.amdtemp.1.core0.sensor0: 19.1C > > > > The BIOS only says CPU temp "Low". > > > > Smartctl shows 30C for hard drive temperatures. The ambient temp in > > the room is about 24C - defective CPU thermal sensors? > > > Most likely. > > Here's a temporary fix: > > Have you ever recorded your CPU temperature and load before? > > If so, compare the load averages with then and now, and set the sensor > offset, so the readings match the temperatures. I'm not sure I understand your fix: I'd monitor temps at idle and under load, and record (false) readings in both states? -- Janos Dohanics