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Special Forums Hardware Sun X4600 M2 enable Hyperthreading Post 302909494 by bartus11 on Thursday 17th of July 2014 10:53:53 AM
Old 07-17-2014
As far as I know AMD CPUs have the same number of threads as the number of cores. Intel CPUs have the HT technology, which exports more virtual CPUs to the operating system than the number of cores.
 

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AMDTEMP(4)						   BSD Kernel Interfaces Manual 						AMDTEMP(4)

NAME
amdtemp -- AMD CPU on-die digital thermal sensor SYNOPSIS
amdtemp* at pchb? DESCRIPTION
The amdtemp driver provides support for the on-die digital thermal sensor present on AMD K8, AMD Barcelona, AMD Phenom, AMD Griffin, and AMD Fusion CPUs. These sensors were officially introduced in AMD K8 Revision F processors, and provide 0.5 degC accuracy. Precision was improved in Revision G chips, which provide two more bits for 0.25 degC steppings. Each core has two temperature sensors, and there are up to two cores per CPU socket. AMD Barcelona, AMD Phenom, AMD Griffin, and AMD Fusion provide 0.125 degC accuracy and provide one temperature sensor for each CPU socket. The amdtemp driver reports temperatures through the envsys(4) API. Sensor Units Typical Use CPUN sensor0 uK cpuN temperature SEE ALSO
envsys(4), envstat(8), powerd(8) HISTORY
The amdtemp driver first appeared in OpenBSD 4.4 named ``kate''. It was then ported to NetBSD 5.0. The driver has been renamed with support for newer AMD CPUs. AUTHORS
The amdtemp driver was written by Constantine A. Murenin <cnst@openbsd.org> whilst at the University of Waterloo. It was adapted to NetBSD by Christoph Egger. BSD
March 2, 2012 BSD
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