[Solved] Which one of the 6 temperature is the CPU one?

amixra · 2024-09-01 07:07:23

$ sensors
iwlwifi_1-virtual-0
Adapter: Virtual device
temp1:        +49.0°C

nvme-pci-e100
Adapter: PCI adapter
Composite:    +41.9°C  (low  =  -0.1°C, high = +82.8°C)
                       (crit = +89.8°C)
Sensor 1:     +42.9°C  (low  = -273.1°C, high = +65261.8°C)

coretemp-isa-0000
Adapter: ISA adapter
Package id 0:  +57.0°C  (high = +100.0°C, crit = +100.0°C)
Core 0:        +54.0°C  (high = +100.0°C, crit = +100.0°C)
Core 1:        +54.0°C  (high = +100.0°C, crit = +100.0°C)
Core 2:        +55.0°C  (high = +100.0°C, crit = +100.0°C)
Core 3:        +54.0°C  (high = +100.0°C, crit = +100.0°C)

dell_smm-virtual-0
Adapter: Virtual device
fan1:           0 RPM  (min =    0 RPM, max = 5800 RPM)
temp1:        +58.0°C
temp2:        +47.0°C
temp3:        +43.0°C
temp4:        +35.0°C

BAT0-acpi-0
Adapter: ACPI interface
in0:          11.69 V
curr1:       741.00 mA

$ cat /sys/class/thermal/thermal_zone0/temp
20000
$ cat /sys/class/thermal/thermal_zone1/temp                
47050
$ cat /sys/class/thermal/thermal_zone2/temp                
43050
$ cat /sys/class/thermal/thermal_zone3/temp                
58050
$ cat /sys/class/thermal/thermal_zone4/temp                
49000
$ cat /sys/class/thermal/thermal_zone5/temp                
57000

By default, I always see thermal_zone0 temperature, which is 20 degree Celsius.

Last edited by amixra (2024-09-03 14:47:17)

mesaprotector · 2024-09-01 08:14:41

coretemp-isa-0000 is where your CPU's temperature sensors are listed. Core 0-3 show the individual temperatures for each core, and "Package id 0" is usually the highest temperature out of all of the sensors the CPU has.

amixra · 2024-09-01 12:00:42

May you also help which file contains the required value? I have to display that in a widget in wm that takes file paths as input.

mesaprotector · 2024-09-01 15:45:08

amixra wrote:

May you also help which file contains the required value? I have to display that in a widget in wm that takes file paths as input.

When I needed to do something similar I just grepped it from the sensors command. I think I did something like "sensors | grep -i Package | head -n1 | cut -c17-18". But you could probably figure it out by monitoring both at the same time and seeing which temperature matches the one in "package id 0".

stanczew · 2024-09-01 17:54:00

Look in /sys/class/hwmon instead of /sys/class/thermal. There are "name" files in hwmonX subdirectories, one of these should read "coretemp", which would be the CPU. Then go through tempX_label files to find "Package id 0".

Last edited by stanczew (2024-09-01 17:55:13)

amixra · 2024-09-02 14:45:57

stanczew wrote:

Look in /sys/class/hwmon instead of /sys/class/thermal. There are "name" files in hwmonX subdirectories, one of these should read "coretemp", which would be the CPU. Then go through tempX_label files to find "Package id 0".

Yeah I followed that
Found

/sys/class/hwmon/hwmon5/name
--------------------------------------------
coretemp

then

/sys/class/hwmon/hwmon5/temp1_label
-----------------------------------------------------
Package id 0

Where is the temperature? I suppose you intended that temp1_label was the location of the file path where I would find temperature.

stanczew · 2024-09-02 15:08:52

Next to temp1_label should be temp1_input, which returns the temperature reading.

amixra · 2024-09-02 17:19:33

Yeah thanks!

amixra · 2024-09-03 14:29:00

No actually it changes with probably every boot. This time, same files are in hwmon4.

But yeah! Now I know how to find in which one hwmon* I will find the temperature. And probably use solution given above by invoking command and grepping and cutting required piece.

Last edited by amixra (2024-09-03 14:46:41)

stanczew · 2024-09-03 17:10:20

You can look at the target of hwmonX symlink, and use that directly.
E.g.

$ cat /sys/class/hwmon/hwmon3/name
k10temp
$ ls -l /sys/class/hwmon/hwmon3
lrwxrwxrwx 1 root root 0 Aug 29 17:29 /sys/class/hwmon/hwmon3 -> ../../devices/pci0000:00/0000:00:18.3/hwmon/hwmon3
$ cat /sys/devices/pci0000:00/0000:00:18.3/hwmon/hwmon*/name
k10temp

amixra · 2024-09-04 04:24:02

Hmm... let see if hwmon* stays same this time

$ cat /sys/devices/platform/coretemp.0/hwmon/hwmon5/temp1_label /sys/devices/platform/coretemp.0/hwmon/hwmon5/temp1_input                         
Package id 0
53000

V1del · 2024-09-04 09:01:20

hwmon5 will not stay the same (that's assigned dynamically among all hwmonitors and not deterministic unless you enforce it with udev rules), but you can just wildcard that away with a * or a ? since the rest of the path should enforce the actual monitor. What widget only takes a hard coded file path?

amixra · 2024-09-04 14:50:40

OK, so grepping and cutting FTW. Widget can take as many file as I want and already have few directories by default as given below:

/sys/class/devices/virtual/thermal/thermal_zone*
/sys/class/devices/platform/coretemp*/hwmon/hwon*

It has always been showing 20 C on this laptop from day 1 but was working for another laptop without any changes.
Apparently, I have none of those directories.
So, I tried providing it one file if that can reduce confusion for the widget. As providing following path rendered N/A C in the widget.
/sys/class/hwmon/hwmon*/temp1_input

amixra · 2024-09-04 14:54:18

Following is widget code

-- Coretemp
local tempicon = wibox.widget.imagebox(theme.widget_temp)
local temp = lain.widget.temp({
    tempfile = '/sys/class/hwmon/hwmon*/temp1_input',
    settings = function()
        widget:set_markup(markup.fontfg(theme.font, "#f1af5f", coretemp_now .. "°C "))
    end
})

Following is the relevant markdown I was referring (text editor showed me that reference on hovering)

## Usage

[Read here.](https://github.com/lcpz/lain/wiki/Widgets#usage)

### Description

Shows the current CPU temperature.

```lua
local mytemp = lain.widget.temp()
```

## Input table

Variable | Meaning | Type | Default
--- | --- | --- | ---
`timeout` | Refresh timeout (in seconds) | integer | 30
`tempfile` | Path of file which stores core temperature value | string | "/sys/devices/virtual/thermal/thermal_zone0/temp"
`settings` | User settings | function | empty function
`widget` | Widget to render | function | `wibox.widget.textbox`

`settings` can use the string `coretemp_now`, which contains the info retrieved from `tempfile`, and the table `temp_now`, which contains an entry for each `*temp*` file in each directory in the following paths:

```shell
/sys/class/devices/virtual/thermal/thermal_zone*
/sys/class/devices/platform/coretemp*/hwmon/hwon*
```

All values are expressed in Celsius (GNU/Linux standard).

## Output table

Variable | Meaning | Type
--- | --- | ---
`widget` | The widget | `wibox.widget.textbox`
`update` | Update `widget` | function

Arch Linux

#1 2024-09-01 07:07:23

[Solved] Which one of the 6 temperature is the CPU one?

#2 2024-09-01 08:14:41

Re: [Solved] Which one of the 6 temperature is the CPU one?

#3 2024-09-01 12:00:42

Re: [Solved] Which one of the 6 temperature is the CPU one?

#4 2024-09-01 15:45:08

Re: [Solved] Which one of the 6 temperature is the CPU one?

#5 2024-09-01 17:54:00

Re: [Solved] Which one of the 6 temperature is the CPU one?

#6 2024-09-02 14:45:57

Re: [Solved] Which one of the 6 temperature is the CPU one?

#7 2024-09-02 15:08:52

Re: [Solved] Which one of the 6 temperature is the CPU one?

#8 2024-09-02 17:19:33

Re: [Solved] Which one of the 6 temperature is the CPU one?

#9 2024-09-03 14:29:00

Re: [Solved] Which one of the 6 temperature is the CPU one?

#10 2024-09-03 17:10:20

Re: [Solved] Which one of the 6 temperature is the CPU one?

#11 2024-09-04 04:24:02

Re: [Solved] Which one of the 6 temperature is the CPU one?

#12 2024-09-04 09:01:20

Re: [Solved] Which one of the 6 temperature is the CPU one?

#13 2024-09-04 14:50:40

Re: [Solved] Which one of the 6 temperature is the CPU one?

#14 2024-09-04 14:54:18

Re: [Solved] Which one of the 6 temperature is the CPU one?

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