Date: Thu, 14 May 2015 10:16:03 -0453 From: "William A. Mahaffey III" <wam@hiwaay.net> Cc: "FreeBSD Questions !!!!" <freebsd-questions@freebsd.org> Subject: Re: sysctl question Message-ID: <5554BABC.6080705@hiwaay.net> In-Reply-To: <20150514105902.319e5f3f@gecko4> References: <55541052.6020802@hiwaay.net> <20150514055826.01e841ae@gecko4> <5554ABEF.4070300@hiwaay.net> <5554AD9D.9060201@hiwaay.net> <20150514105902.319e5f3f@gecko4>
next in thread | previous in thread | raw e-mail | index | archive | help
On 05/14/15 10:05, mfv wrote: > On Thu, 14 May 2015 09:20:04 -0453 > "William A. Mahaffey III" <wam@hiwaay.net> 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.
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?5554BABC.6080705>