Date: Fri, 18 Jul 2014 05:53:37 -0400 From: Janos Dohanics <web@3dresearch.com> To: FreeBSD Questions <freebsd-questions@freebsd.org> Subject: Re: CPU temperature reading Message-ID: <20140718055337.5f7aab7429cd3f2f454dc74d@3dresearch.com> In-Reply-To: <CAL2OafyfshZJVC12qi40zZbE4iwixUxyTi7WRp=WPEKB7Gg5Sw@mail.gmail.com> References: <20140717135458.6c3a58d14732798685660928@3dresearch.com> <CAL2OafyfshZJVC12qi40zZbE4iwixUxyTi7WRp=WPEKB7Gg5Sw@mail.gmail.com>
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On Thu, 17 Jul 2014 14:19:44 -0400 Antoine Kallab <antoine@kallab.com> wrote: > On Thu, Jul 17, 2014 at 1:54 PM, Janos Dohanics <web@3dresearch.com> > 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
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