Graphs the power use of a host inside a text terminal, using:
- intel-rapl data from the /sys filesystem.
- hwmon data from the /sys filesystem.
- nvidia data from libnvidia-ml.so.1 (if installed.)
Because the plot ticks at 1 sample per second, you can either read the values as power (Joules per second, or Watt) or as an absolute energy value (Joules.)
In this screenshot we see a machine with an AMD Radeon RX7600 and an Intel Arc B580 GPU. The machine starts idle. The first peak is when the CPU is hammered, the second peak when the Radeon is hammered, the third peak when the Arc is hammered, and the last peak when all three are hammered.
NONE (but for NVIDIA support, runtime dep on libnvidia-ml1, no build deps.)
$ make
$ sudo ./energygraph
Requires root for the RAPL energy counters. If you do not want to run as root, you can tolerate missing RAPL data and only graph what is readable (e.g. GPUs):
$ TOLERATE_MISSING_ENERGY_DATA=rapl ./energygraph
See the legend: top level zones are reported in capitals.
sub-zones have the same colour hue as parent.
Zone domains:
- psys: Platform.
- package-N: A CPU.
- core: On CPU package. Cores of a CPU.
- uncore: On CPU package, but not a core. Typically an iGPU.
- dram: Memory.
- XE: Intel iGPU/dGPU.
- AMDGPU: AMD iGPU/dGPU.
Known to work for Intel and AMD CPUs. Known to work with Intel/AMD/NVIDIA GPUs.
Requires /sys/devices/virtual/powercap/intel-rapl/ entries.
Requires root privileges.
Copyright 2022-2026 by Bram Stolk, licensed using the MIT Open Source License.