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pa4wdh
l33t
Joined: 16 Dec 2005
Posts: 868
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 Posted: Mon Aug 12, 2024 5:35 pm Post subject: Which sensors are available on a multi-CPU AMD system? |
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Hi All,
Following advice in this topic i'm starting a separate topic for this question: https://forums.gentoo.org/viewtopic-t-1163405.html
I'm working on a program that sets the CPU's maximum frequency based on it's temperature. This allows systems to run cooler, it keeps my passive cooled system at about 70 degrees max under full load, and keeps more power hungry systems cooler so active fans can run slower (and make less noise).
One feature i'd like to add is multi-CPU support. So this is not multi-CORE, but really two (or more) physically separate CPU's on the motherboard. Sysfs reports which core belongs to which physical package, so setting the frequency per physical CPU should be easy.
Temperature readings for intel are easy too, there is a sensor called "Package id <number>" per CPU. For AMD systems i can't find the information to locate the sensors and how to relate them to a physical CPU.
If someone has access to a multi-CPU AMD system, would you be willing to run this script to collect some information and post the results here?
| Code: | #!/bin/bash
HWMONS=`find /sys/class/hwmon/ -mindepth 1`
for HWMON in $HWMONS
do
echo "Directory: $HWMON"
echo "Driver: `cat "$HWMON/name"`"
TEMPS=`find "$HWMON/" -maxdepth 2 -name "temp*_input"`
for TEMP in $TEMPS
do
LABEL=${TEMP//_input/_label}
if [ -r "$LABEL" ]
then
echo "`cat $LABEL` at $TEMP, value: `cat $TEMP`"
else
echo "Unnamed sensor at $TEMP, value: `cat $TEMP`"
fi
done
done
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It will list all hwmon's with driver names and sensors, root privileges are not required. For example this is the output on my single-CPU multi-CORE intel system:
| Code: | Directory: /sys/class/hwmon/hwmon2
Driver: drivetemp
Unnamed sensor at /sys/class/hwmon/hwmon2/temp1_input, value: 42000
Directory: /sys/class/hwmon/hwmon0
Driver: acpitz
Unnamed sensor at /sys/class/hwmon/hwmon0/temp1_input, value: 48000
Directory: /sys/class/hwmon/hwmon1
Driver: coretemp
Core 1 at /sys/class/hwmon/hwmon1/temp3_input, value: 46000
Core 2 at /sys/class/hwmon/hwmon1/temp4_input, value: 46000
Package id 0 at /sys/class/hwmon/hwmon1/temp1_input, value: 48000
Core 3 at /sys/class/hwmon/hwmon1/temp5_input, value: 46000
Core 0 at /sys/class/hwmon/hwmon1/temp2_input, value: 46000
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Thanks in advance for any information you can provide.
_________________
The gentoo way of bringing peace to the world:
USE="-war" emerge --newuse @world
My shared code repository: https://code.pa4wdh.nl.eu.org
Music, Free as in Freedom: https://www.jamendo.com |
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molletts
Tux's lil' helper
Joined: 16 Feb 2013
Posts: 127
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| Posted: Tue Aug 13, 2024 6:32 pm Post subject: |
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This is from an older dual-Opteron 6380 (Piledriver) system, using the k10temp sensor driver:
| Code: | Directory: /sys/class/hwmon/hwmon8
Driver: be2net
Unnamed sensor at /sys/class/hwmon/hwmon8/temp1_input, value: 44000
Directory: /sys/class/hwmon/hwmon6
Driver: be2net
Unnamed sensor at /sys/class/hwmon/hwmon6/temp1_input, value: 44000
Directory: /sys/class/hwmon/hwmon4
Driver: k10temp
Unnamed sensor at /sys/class/hwmon/hwmon4/temp1_input, value: 28500
Directory: /sys/class/hwmon/hwmon2
Driver: k10temp
Unnamed sensor at /sys/class/hwmon/hwmon2/temp1_input, value: 30625
Directory: /sys/class/hwmon/hwmon0
Driver: fam15h_power
Directory: /sys/class/hwmon/hwmon7
Driver: tg3
Unnamed sensor at /sys/class/hwmon/hwmon7/temp1_input, value: 55000
Directory: /sys/class/hwmon/hwmon5
Driver: k10temp
Unnamed sensor at /sys/class/hwmon/hwmon5/temp1_input, value: 28625
Directory: /sys/class/hwmon/hwmon3
Driver: fam15h_power
Directory: /sys/class/hwmon/hwmon1
Driver: k10temp
Unnamed sensor at /sys/class/hwmon/hwmon1/temp1_input, value: 34000 |
Unfortunately, it only reports a single temperature per package, as you can see. They look a bit on the low side, too, given that the system is busy at the moment. The iLO management module reports the CPU temps to be about 12° above this. My FX-9590 (also Piledriver) desktop routinely reports about 20° below its actual temperature via the k10temp sensors. |
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