Take temperature from thermal zones

[Camerooooon]

We should consider thermal zones as an alternative to systems that do not have individual cpu temperature read outs.

[Shuzhengz]

yep good idea

[Camerooooon]

I would also like to add that thermal zones could also be displayed in addition to regular cpu core temp read outs in acs monit.

[Shuzhengz]

im pretty sure most hardware monitoring software have a package temp somewhere, so we could just add it in

[Camerooooon]

We should take a look at the source for the "sensors" application. That program was able to read out core temps on my server where auto clock speed otherwise wasn't.

[Camerooooon]

We should take a look at the source for the "sensors" application. That program was able to read out core temps on my server where auto clock speed otherwise wasn't.

I suspect that they use thermal zones in order to achieve this

[Shuzhengz]

that would make sense since hyperthreaded cores are not physical

[Shuzhengz]

ok i just tested on my other laptop, and turns out that one has 19 thermal zones instead of 2
we need to find the one thats x86_pkg_temp type and use the package temperature instead of a bunch of virtual temps

[Shuzhengz]

i suspect it's caused by intel vpro

[Camerooooon]

ok i just tested on my other laptop, and turns out that one has 19 thermal zones instead of 2

we need to find the one thats x86_pkg_temp type and use the package temperature instead of a bunch of virtual temps

Are the other thermal zones still useful to us?

[Camerooooon]

ok i just tested on my other laptop, and turns out that one has 19 thermal zones instead of 2

we need to find the one thats x86_pkg_temp type and use the package temperature instead of a bunch of virtual temps

Are the other thermal zones still useful to us?

[Shuzhengz]

after running stress test it seems like all the other sensors are virtual and the value of the temperature does not change

[Shuzhengz]

after running cat /sys/class/thermal/thermal_zone*/type it shows the following
acpitz SEN8 SEN9 SENA SENB SENC SEND pch_cannonlake B0D4 x86_pkg_temp iwlwifi_1 INT3400_Thermal SEN0 SEN1 SEN2 SEN3 SEN4 SEN5 SEN6 SEN7

[Shuzhengz]

it seems like all the SEN* types have static value
iwlwifi is probably the dedicated wifi card

[Shuzhengz]

the MSR address 0x1b1 also outputs the package temperature in hex (you have to convert it into actual readings using the 22:16 output bitfield)

[Camerooooon]

Is it alrighty if I take this issue? @Shuzhengz

[Shuzhengz]

o yee