From owner-freebsd-questions@FreeBSD.ORG Thu May 14 14:59:04 2015 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id CEFEA577 for ; Thu, 14 May 2015 14:59:04 +0000 (UTC) Received: from smtp1.bway.net (smtp1.bway.net [216.220.96.27]) (using TLSv1 with cipher DHE-RSA-CAMELLIA256-SHA (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id A75E71597 for ; Thu, 14 May 2015 14:59:04 +0000 (UTC) Received: from gecko4 (host-216-220-115-31.dsl.bway.net [216.220.115.31]) (using TLSv1 with cipher AES128-SHA (128/128 bits)) (No client certificate requested) (Authenticated sender: m1316v@bway.net) by smtp1.bway.net (Postfix) with ESMTPSA id 2203895868; Thu, 14 May 2015 10:59:03 -0400 (EDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=bway.net; s=mail; t=1431615543; bh=JhgOgSX8EvrGVbw7OgXsvRF9ZO9conkslvtZyLu1Oxk=; h=Date:From:To:Cc:Subject:In-Reply-To:References:Reply-To; b=VWpAvgIghbr+QKuY973GaLHvz2gpaYphPTGE4PQsEGkScOSMIEHARcn94zpB1QCxy s8hnzLWd0m470yFYbZSlV/TCxkAdc3JtnscVnwHVlLommT8JUhsFY2zG8jLjaMgzDF FOeSnkMSpmNFapTsfa4tlCG92vhKs/Z24iU5frUY= Date: Thu, 14 May 2015 10:59:02 -0400 From: mfv To: "William A. Mahaffey III" Cc: "FreeBSD Questions !!!!" Subject: Re: sysctl question Message-ID: <20150514105902.319e5f3f@gecko4> In-Reply-To: <5554AD9D.9060201@hiwaay.net> References: <55541052.6020802@hiwaay.net> <20150514055826.01e841ae@gecko4> <5554ABEF.4070300@hiwaay.net> <5554AD9D.9060201@hiwaay.net> Reply-To: mfv@bway.net MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 14 May 2015 14:59:05 -0000 On Thu, 14 May 2015 09:20:04 -0453 "William A. Mahaffey III" wrote: > On 05/14/15 09:12, William A. Mahaffey III wrote: > > On 05/14/15 05:04, mfv wrote: > >> Hello William, > >> > >> I had the same problem using amdtemp but used the sysctl setting > >> "dev.amdtemp.%d.sensor_offset" to make it more accurate. The value > >> was determined by comparing the unadjusted value of admtemp with > >> the value shown in the BIOS. In my case the setting > >> in /etc/sysctl.conf is: > >> > >> dev.amdtemp.0.sensor_offset=24 > >> > >> A room thermometer was also helpful to measure the difference by > >> comparing the difference between the room temperature and the BIOS > >> after the CPU was placed under load. > >> > >> To read the value I then bound the F2-key in csh.cshrc file as > >> follows: > >> > >> bindkey -c "^[OQ" 'sysctl -e dev.amdtemp.0.core0' > >> > >> The results of the reading are not as accurate as I would like but > >> are an improvement. > >> > >> Cheers ... __o > >> _ \<,_ > >> Marek (+)/ (+) > >> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > > > > P.S. Is there a way to set this on the fly, w/o a reboot ? > > TIA :-) .... > > > > > [root@kabini1, /etc, 9:18:34am] 369 % sysctl > dev.amdtemp.0.sensor_offset=24 sysctl: unknown oid > 'dev.amdtemp.0.sensor_offset' [root@kabini1, /etc, 9:18:36am] 370 % > sysctl amdtemp.0.sensor_offset=24 sysctl: unknown oid > 'amdtemp.0.sensor_offset' [root@kabini1, /etc, 9:18:37am] 371 % > sysctl -A | grep -i amdtemp dev.amdtemp.0.%desc: AMD CPU On-Die > Thermal Sensors dev.amdtemp.0.%driver: amdtemp > dev.amdtemp.0.%parent: hostb5 > dev.amdtemp.0.sensor0.core0: 10.0C > [root@kabini1, /etc, 9:18:41am] 372 % uname -a > FreeBSD kabini1.local 9.3-RELEASE-p13 FreeBSD 9.3-RELEASE-p13 #0: Tue > Apr 7 03:01:12 UTC 2015 > root@amd64-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC amd64 > [wam@kabini1, ~, 9:19:39am] 399 % > > Yes, it is possible to do it on the fly: [10:55] ~ > dev.amdtemp.0.core0.sensor0=39.7C [10:55] ~ > sudo sysctl dev.amdtemp.0.sensor_offset=0 dev.amdtemp.0.sensor_offset: 24 -> 0 [10:55] ~ > dev.amdtemp.0.core0.sensor0=15.7C [10:55] ~ > sudo sysctl dev.amdtemp.0.sensor_offset=24 dev.amdtemp.0.sensor_offset: 0 -> 24 [10:55] ~ > dev.amdtemp.0.core0.sensor0=39.8C The 1st, 3rd and 5th command line are the results of the binding of the F2-key to the sysctl output. The 2nd command line sets the offset to the default of 0 while the 4th command line sets it back to 24 which is normally set in /etc/sysctl.conf. Your value will probably be different. Cheers ... Marek