Re: Making sense of temperatures and CPU fan

On Sunday 29 March 2009, Grant wrote:
> >> I have gkrellm running on a Gentoo system with the following
> >> temperatures reported:
> >>
> >> Core0 25
> >> Core0 27
> >> Core1 29
> >> Core1 32
> >> THRM 47
> >>
> >
> > according to this it is a dual core processor. i am not sure why there are 
2
> > for each core. i would err on the high side and choose the highest temp 
for
> > each core to display. the thermistor is usually under the processor at 
least
> > on my mobo it is, and so itis subject to nearby component heating as well 
and
> > not as accurate as the core temp readings.
> 
> Does anyone know why there are 2 temperature readings for each CPU core?
> 

ahh. you neglected to say you are using AMD processors. you have a dual 
processor machine filled with 2 dual core processors.  each listing for our 
dual core opterons shows 2 of each 'core' designation, so i chose the one 
that matched what the 'sensors' command listed for temps for each. i am not 
sure why there are 2 of each for each processor. it seems to not be 
in 'sensors' but in gkrellm.

 again just choose the core0 and 1 for each processor that match what sensors 
reports for temps.


> >> How can I figure out what these different temperature zones correspond
> >> to?  Is one of them CPU temperature?
> 
> Do you know what the THRM ("thermal_zone") is?
> 


i would think more that it is thermistor rather than thermal zone. what it 
measures is unique to your motherboard i doubt it is processors via external 
thermistor since there is only one report rather than 2. a call to nvidia 
might be in order to find out what this thermistor measures. my first guess 
is it may be measuring mosfets or regulators feeding the processors.

> >> How can I monitor and control CPU fan speed?  Under "Sensors" in the
> >> Configutation, neither "Fans" or "Voltages" has an "Enable" checkbox.
> >>
> >
> > i don't know on nvidia chipsets, i can only assume a sensor module is 
missing
> > to be able to sense these things. are you using lm-sensors? if so from a
> > terminal session what does the command 'sensors' return to you? it should
> > show everything readable by the current modules.
> 
> I am using lm-sensors and I get:
> 
> # sensors
> k8temp-pci-00c3
> Adapter: PCI adapter
> Core0 Temp:
>              +22 C
> Core0 Temp:
>              +25 C
> Core1 Temp:
>              +28 C
> Core1 Temp:
>              +26 C
> 
> I've tried with and without SMARTFAN enabled in the BIOS with the same 
results.
> 

hmm sensors doesnt return something like this in the listing?

fan1:     2163 RPM  (min =    0 RPM)
fan2:     1785 RPM  (min =    0 RPM)
fan3:     1439 RPM  (min =    0 RPM)
fan4:     1461 RPM  (min =    0 RPM)
temp1:       +43°C  (low  =  +127°C, high =  +127°C)   sensor = thermistor
temp2:       +41°C  (low  =  +127°C, high =  +127°C)   sensor = diode

the above was taken from my intel system... but now that i believe you have 
amd processors, probably opterons, here is a sample listing from one of our 
servers. it uses a tyan motherboard which is using via chipset rather than 
nvidia. i suggest checking for forums about nvidia chipset sensors, there may 
be one that you don't have installed. possibly it needs a 3rd party sensor 
module or nvidia may have a chipset module or solution to this. i noticed 
your sensors report was too short indicating that the proper modules do not 
appear to be installed. 

did you run sensors-detect when you installed lm-sensors?

k8temp-pci-00c3
Adapter: PCI adapter
Core0 Temp:
             +52 C
Core1 Temp:
             +60 C

k8temp-pci-00cb
Adapter: PCI adapter
Core0 Temp:
             +55 C
Core1 Temp:
             +58 C

adt7463-i2c-1-2d
Adapter: SMBus AMD8111 adapter at 50e0
V1.5:      +2.637 V  (min =  +0.00 V, max =  +3.32 V)
VCore:     +1.318 V  (min =  +0.00 V, max =  +2.99 V)
V3.3:      +3.334 V  (min =  +0.00 V, max =  +4.38 V)
V5:        +5.137 V  (min =  +0.00 V, max =  +6.64 V)
V12:      +11.781 V  (min =  +0.00 V, max = +15.94 V)
CPU_Fan:   8108 RPM  (min =    0 RPM)
fan2:      7637 RPM  (min =    0 RPM)
fan3:      7209 RPM  (min =    0 RPM)
fan4:         0 RPM  (min =    0 RPM)
CPU Temp: +53.75 C  (low  =  -127 C, high =  +127 C)
Board Temp:
          +37.25 C  (low  =  -127 C, high =  +127 C)
Remote Temp:
          +54.25 C  (low  =  -127 C, high =  +127 C)
CPU_PWM:   255
Fan2_PWM:  255
Fan3_PWM:  255
vid:      +1.350 V  (VRM Version 2.4)

w83627hf-isa-0290
Adapter: ISA adapter
VCore 1:   +1.36 V  (min =  +1.44 V, max =  +1.86 V)       ALARM
VCore 2:   +1.36 V  (min =  +1.44 V, max =  +1.86 V)       ALARM
+3.3V:     +3.28 V  (min =  +2.82 V, max =  +3.79 V)
+5V:       +5.05 V  (min =  +0.03 V, max =  +0.03 V)       ALARM
+12V:      +4.99 V  (min =  +1.46 V, max =  +0.00 V)       ALARM
-12V:      -1.42 V  (min = -14.25 V, max = -14.91 V)       ALARM
-5V:       -3.64 V  (min =  -7.71 V, max =  -7.31 V)       ALARM
V5SB:      +5.64 V  (min =  +1.08 V, max =  +0.00 V)       ALARM
VBat:      +3.33 V  (min =  +0.06 V, max =  +0.00 V)       ALARM
fan1:     7031 RPM  (min = 84375 RPM, div = 2)              ALARM
fan2:     6617 RPM  (min =   -1 RPM, div = 2)              ALARM
fan3:     8437 RPM  (min = 67500 RPM, div = 2)              ALARM
temp1:       +36 C  (high =    +4 C, hyst =    +0 C)   sensor = thermistor   
ALARM
temp2:     +39.5 C  (high =   +80 C, hyst =   +75 C)   sensor = thermistor
temp3:     +46.5 C  (high =   +80 C, hyst =   +75 C)   sensor = thermistor
vid:      +1.350 V  (VRM Version 2.4)
alarms:
beep_enable:
          Sound alarm enabled




> - Grant
> 
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-- 

Rio


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