From owner-freebsd-questions@FreeBSD.ORG Thu May 14 15:09:51 2015 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 263F9B93 for ; Thu, 14 May 2015 15:09:51 +0000 (UTC) Received: from fly.hiwaay.net (fly.hiwaay.net [216.180.54.1]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id E169916E9 for ; Thu, 14 May 2015 15:09:50 +0000 (UTC) Received: from kabini1.local (rbn1-216-180-19-49.adsl.hiwaay.net [216.180.19.49]) (authenticated bits=0) by fly.hiwaay.net (8.13.8/8.13.8/fly) with ESMTP id t4EF9mRb025695 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES128-SHA bits=128 verify=NO) for ; Thu, 14 May 2015 10:09:49 -0500 Message-ID: <5554BABC.6080705@hiwaay.net> Date: Thu, 14 May 2015 10:16:03 -0453 From: "William A. Mahaffey III" User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:31.0) Gecko/20100101 Thunderbird/31.6.0 MIME-Version: 1.0 CC: "FreeBSD Questions !!!!" Subject: Re: sysctl question References: <55541052.6020802@hiwaay.net> <20150514055826.01e841ae@gecko4> <5554ABEF.4070300@hiwaay.net> <5554AD9D.9060201@hiwaay.net> <20150514105902.319e5f3f@gecko4> In-Reply-To: <20150514105902.319e5f3f@gecko4> Content-Type: text/plain; charset=windows-1252; format=flowed 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 15:09:51 -0000 On 05/14/15 10:05, mfv wrote: > 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 > _______________________________________________ > freebsd-questions@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to "freebsd-questions-unsubscribe@freebsd.org" > When I tried as you did above as root (see farther above), it said 'sysctl: unknown oid'. What version of FreeBSD are you using ? I'm on 9.3R-p13, I suspect you might be on 10.1, & maybe that sysctl variable isn't available under 9.3R .... -- William A. Mahaffey III ---------------------------------------------------------------------- "The M1 Garand is without doubt the finest implement of war ever devised by man." -- Gen. George S. Patton Jr.