[lm-sensors] wrong output with fam15h_power
andreas.herrmann3 at amd.com
Tue Nov 22 09:41:53 CET 2011
On Fri, Nov 18, 2011 at 07:47:03PM +0100, Lucas Stach wrote:
> I'm trying to use the fam15h_power driver to measure my processors power
> consumption, but it gives me clearly wrong values. With a completely
> idle system the processor claims to be using 125261718µW, which would
> mean the processor operates at it's TDP limit. With all cores 100%
> loaded it claims to be using 130675781µW which I can't believe as this
> would mean the processor violates it's own spec.
> This is a desktop system with an AMD FX-8150 processor on a brand new
> Gigabyte GA-970A-UD3 board with the latest (F4) BIOS.
> Is this a known bug? If not I would be glad to help track this down. I
> had a quick look at the BIOS and Kernel Developer’s Guide (BKDG) for AMD
> Family 15h (#42301) but couldn't determine if the math done in the
> fam15h_power driver is correct or if we need to set some registers to
> specific values to make this work as intended. Any hints would be
FYI, I am looking into this. I've recently also seen that the values
reported in idle state seem to be bogus values as the power
consumption measured for the entire system is often less then the
value reported by the driver for CPU power consumption.
Hope that I can provide an explanation for this oddities soon.
Operating | Advanced Micro Devices GmbH
System | Einsteinring 24, 85609 Dornach/Aschheim, Germany
Research | Geschäftsführer: Alberto Bozzo
Center | Sitz: Dornach, Gemeinde Aschheim, Landkreis München
(OSRC) | Registergericht München, HRB Nr. 43632, WEEE-Reg-Nr: DE 12919551
More information about the lm-sensors