thread 'main' panicked at 'Couldn't find intel_rapl modules.' about scaphandre

[frntn]

Spotted ! 🥳

$ apt install linux-modules-extra-$(uname -r)

$ modprobe intel_rapl_common 

$ docker run -v /sys/class/powercap:/sys/class/powercap -v /proc:/proc -e RUST_BACKTRACE=full -ti hubblo/scaphandre stdout -t 15
Measurement step is: 2s
Host:   0 W     Core            Uncore          DRAM
Socket0 ? W     0 W
Top 5 consumers:
Power   PID     Exe
------------------------------------------------------------

Host:   11.838703 W     Core            Uncore          DRAM
Socket0 11.88223 W      8.319255 W
Top 5 consumers:
Power   PID     Exe
5.7872815 W     377006  ""
1.218375 W      848     ""
0.30459374 W    558     ""
0.30459374 W    905     ""
0 W     1       ""
------------------------------------------------------------

Host:   13.552203 W     Core            Uncore          DRAM
Socket0 13.544806 W     10.927634 W
Top 5 consumers:
Power   PID     Exe
9.757587 W      377006  ""
0.7744116 W     1891    ""
0.61952925 W    1620    ""
0.15488231 W    1       ""
0.15488231 W    11      ""
------------------------------------------------------------

Thank you @uggla & @bpetit 💪

[bpetit]

Hi,

Thanks for reporting. What is the ouput of lsmod | grep intel_rapl ?

[frntn]

Hello,

No output for this command

$ lsmod | grep intel_rapl
$

If I try to load the module I get an error

$ modprobe intel_rapl
modprobe: FATAL: Module intel_rapl not found in directory /lib/modules/5.4.0-62-generic

But some related files do exist

$ locate rapl
/usr/src/linux-headers-5.4.0-62/include/linux/intel_rapl.h
/usr/src/linux-headers-5.4.0-62-generic/include/config/intel/rapl
/usr/src/linux-headers-5.4.0-62-generic/include/config/intel/rapl.h
/usr/src/linux-headers-5.4.0-62-generic/include/config/intel/rapl/core.h
/usr/src/linux-headers-5.4.0-62-generic/include/config/perf/events/intel/rapl.h
/usr/src/linux-headers-5.4.0-62-generic/include/config/proc/thermal/mmio/rapl.h

[bpetit]

Could you try a modprobe intel_rapl_common and modprobe rapl ?

[frntn]

$ modprobe rapl
modprobe: FATAL: Module rapl not found in directory /lib/modules/5.4.0-62-generic

$ modprobe intel_rapl_common
modprobe: FATAL: Module intel_rapl_common not found in directory /lib/modules/5.4.0-62-generic

Additionally :

$ grep -rni rapl /lib/modules/$(uname -r)/
/lib/modules/5.4.0-62-generic/modules.order:2:kernel/arch/x86/events/rapl.ko
/lib/modules/5.4.0-62-generic/modules.order:3782:kernel/drivers/powercap/intel_rapl_common.ko
/lib/modules/5.4.0-62-generic/modules.order:3783:kernel/drivers/powercap/intel_rapl_msr.ko

$ find /lib/modules/$(uname -r) -type f -name '*.ko' | grep rapl
$

"Is this real life ?" 😅

[bpetit]

I'm on ubuntu 20.04.1 too but I guess there is something different in your setup as I dont have the modules.order:XX-like folders you have:

find /lib/modules/$(uname -r)/ -name *rapl*
/lib/modules/5.8.0-38-generic/kernel/arch/x86/events/rapl.ko
/lib/modules/5.8.0-38-generic/kernel/drivers/powercap/intel_rapl_common.ko
/lib/modules/5.8.0-38-generic/kernel/drivers/powercap/intel_rapl_msr.ko

I don't know where it could come from 🤔

I'm honestly on try and fail mode here, what happens if you manually insmod one of those .ko files available ?

# insmod /lib/modules/5.4.0-62-generic/modules.order:3782:kernel/drivers/powercap/intel_rapl_common.ko

Certainly not a good solution, but I try to understand what's happening and it may give us some lead.

Another question: are you using a kernel you compiled yourself or is it the default one that is managed by your distribution ?

[bpetit]

@uggla just made me realize you may have to install the linux-modules-extra-$(uname-r) package !

I'm very curious about how it is going 🤓 ?

[bpetit]

Great !

It's still strange that you have "traces" of the kernel modules, if you never installed the package before 🤔

If someone has a clear understanding on why it may happen I'm interested ! :)

[DarylSaucier]

Hi everyone,

I had the same problem, but mine goes further 😞
I'm working on a Raspberry Pi 3b+ on which I installed the latest version of RaspiOS (former Raspbian). When I try to install the extra packages using apt, this is what I get :
"Impossible to find the package linux-module-extra-5.10.17-v8". I looked up for answers in several forums but no one seems to provide a way for the installer to find these packages. I'm not very used to install manually Linux packages, so I wonder if anyone has an idea to do so, maybe by adding a repository in the etc/apt/source.plist file ?

Thanks :)

[uggla]

Hi @DarylSaucier, unless if i'm wrong because I have currently no Rasberry Pi to verify. But there is not "rapl" sensor for the Rasberry Pi. The rapl technology is provided only on x86 (Intel or Amd) hardware. So scaphandre cannot run on a rpi.
Looking at the package, I think that it does not make sens to have a module-extra package on the rpi because as the hardware is the same, there are no need to provide various hardware configuration options/extensions.

[DarylSaucier]

Thank you very much @uggla, we'll thus find another machine