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Below you will find an updated version from the original series bunching all patches into one big patch updating broken web addresses that are located in Documentation/* Some of the addresses date as far far back as 1995 etc... so searching became a bit difficult, the best way to deal with these is to use web.archive.org to locate these addresses that are outdated. Now there are also some addresses pointing to .spec files some are located, but some(after searching on the companies site)where still no where to be found. In this case I just changed the address to the company site this way the users can contact the company and they can locate them for the users. Signed-off-by: Justin P. Mattock <justinmattock@gmail.com> Signed-off-by: Thomas Weber <weber@corscience.de> Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Cc: Paulo Marques <pmarques@grupopie.com> Cc: Randy Dunlap <rdunlap@xenotime.net> Cc: Michael Neuling <mikey@neuling.org> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
56 lines
2.0 KiB
Plaintext
56 lines
2.0 KiB
Plaintext
Kernel driver k8temp
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====================
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Supported chips:
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* AMD Athlon64/FX or Opteron CPUs
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Prefix: 'k8temp'
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Addresses scanned: PCI space
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Datasheet: http://support.amd.com/us/Processor_TechDocs/32559.pdf
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Author: Rudolf Marek
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Contact: Rudolf Marek <r.marek@assembler.cz>
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Description
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-----------
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This driver permits reading temperature sensor(s) embedded inside AMD K8
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family CPUs (Athlon64/FX, Opteron). Official documentation says that it works
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from revision F of K8 core, but in fact it seems to be implemented for all
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revisions of K8 except the first two revisions (SH-B0 and SH-B3).
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Please note that you will need at least lm-sensors 2.10.1 for proper userspace
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support.
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There can be up to four temperature sensors inside single CPU. The driver
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will auto-detect the sensors and will display only temperatures from
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implemented sensors.
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Mapping of /sys files is as follows:
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temp1_input - temperature of Core 0 and "place" 0
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temp2_input - temperature of Core 0 and "place" 1
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temp3_input - temperature of Core 1 and "place" 0
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temp4_input - temperature of Core 1 and "place" 1
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Temperatures are measured in degrees Celsius and measurement resolution is
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1 degree C. It is expected that future CPU will have better resolution. The
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temperature is updated once a second. Valid temperatures are from -49 to
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206 degrees C.
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Temperature known as TCaseMax was specified for processors up to revision E.
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This temperature is defined as temperature between heat-spreader and CPU
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case, so the internal CPU temperature supplied by this driver can be higher.
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There is no easy way how to measure the temperature which will correlate
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with TCaseMax temperature.
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For newer revisions of CPU (rev F, socket AM2) there is a mathematically
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computed temperature called TControl, which must be lower than TControlMax.
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The relationship is following:
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temp1_input - TjOffset*2 < TControlMax,
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TjOffset is not yet exported by the driver, TControlMax is usually
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70 degrees C. The rule of the thumb -> CPU temperature should not cross
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60 degrees C too much.
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