Troubleshooting

I get a permission denied error when I run scaphandre, no matter what is the exporter

Since Linux kernel 5.10 (late 2020), the energy counters files that the PowercapRAPL sensor uses, are owned by root.

To ensure this is your issue and fix that quickly you can run the init.sh script:

bash init.sh

Then run scaphandre. If it does not work, the issue is somewhere else.

I get a no such device error, the intel_rapl of intel_rapl_common kernel modules are present

It can mean that your cpu doesn't support RAPL. Please refer to the compatibility section to be sure.

I can't mount the required kernel modules, getting a `Could'nt find XXX modules` error

If you are in a situation comparable to this one, you may need to install additional packages.

On ubuntu 20.01 and 20.10, try to install linux-modules-extra-$(uname -r) with apt. Then you should be able to modprobe intel_rapl_common.

On an AMD cpu machine, I get the following stracktrace

scaphandre::sensors::powercap_rapl: Couldn't find intel_rapl modules.
thread 'main' panicked at 'Trick: if you are running on a vm, do not forget to use --vm parameter invoking scaphandre at the command line', src/sensors/mod.rs:238:18
stack backtrace:
   0: rust_begin_unwind
             at /build/rust/src/rustc-1.49.0-src/library/std/src/panicking.rs:495:5
   1: core::panicking::panic_fmt
             at /build/rust/src/rustc-1.49.0-src/library/core/src/panicking.rs:92:14
   2: core::option::expect_failed
             at /build/rust/src/rustc-1.49.0-src/library/core/src/option.rs:1260:5
   3: core::option::Option<T>::expect
             at /build/rust/src/rustc-1.49.0-src/library/core/src/option.rs:349:21
   4: scaphandre::sensors::Topology::add_cpu_cores
             at ./src/sensors/mod.rs:234:26
   5: <scaphandre::sensors::powercap_rapl::PowercapRAPLSensor as scaphandre::sensors::Sensor>::generate_topology
             at ./src/sensors/powercap_rapl.rs:106:9
   6: <scaphandre::sensors::powercap_rapl::PowercapRAPLSensor as scaphandre::sensors::Sensor>::get_topology
             at ./src/sensors/powercap_rapl.rs:112:24
   7: scaphandre::exporters::stdout::StdoutExporter::new
             at ./src/exporters/stdout.rs:51:30
   8: scaphandre::run
             at ./src/lib.rs:60:28
   9: scaphandre::main
             at ./src/main.rs:91:5
  10: core::ops::function::FnOnce::call_once
             at /build/rust/src/rustc-1.49.0-src/library/core/src/ops/function.rs:227:5
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

We verified that scaphandre (and especially the powercap_rapl sensor) works on AMD Zen processors with a Linux kernel 5.11 or later. Before that kernel version, it won't probably work as the drivers needed to feed powercap with rapl data are not present.

Trying to build the project I get this error

error: linker `cc` not found
  |
  = note: No such file or directory (os error 2)

error: aborting due to previous error

error: could not compile `log`

You need compiling tooling. On Ubuntu/Debian, run:

 sudo apt install build-essential

Scaphandre documentation