Command Line Options

To use Joular Core, just run the command joularcore or joularcore.exe.

The following options are available:

• -p, --pid <PID> : Monitor a specific process by its PID
• -a, --app <APP> : Monitor a specific application by its name (all PIDs)
• -f, --file <FILE> : Write output to CSV file
• -c, --component <COMPONENT> : Monitor only specific component (values: cpu, gpu)
• -i, --numeric : Output only numeric value (no formatting)
• -o, --overwrite : Overwrite file instead of append (only with -f)
• -g, --gui : Start GUI interface
• -r, --ringbuffer : Send power data to ring buffer
• -h, --help : Print help
• -V, --version : Print version

To use Joular Core inside virtual machines, two environment variables must be set depending on whether you want to monitor the CPU, the GPU, or both:

• VM_CPU_POWER_FILE: Path to the CPU power data file
• VM_CPU_POWER_FORMAT: Format of the CPU power data (joularcore or powerjoular or watts, default is watts if not set)
• VM_GPU_POWER_FILE: Path to the GPU power data file
• VM_GPU_POWER_FORMAT: Format of the GPU power data (joularcore or powerjoular or watts, default is watts if not set)

On SBC (Raspberry Pi, Asus TinkerBoard), Joular Core uses our own regression models to calculate CPU power consumption. These models are hard-coded in the code, but you can use your own models by supplying a JSON file with the model detail with the SBC_POWER_MODEL_JSON environmental variable. The format needs to follow the one used in our Power Models Database.