Quick Usage

To use PowerJoular, just run the command powerjoular (or powerjoular.exe on Windows). On Linux PC/servers, PowerJoular uses Intel’s RAPL through the Linux powercap sysfs, and therefore requires root/sudo access on the latest Linux kernels (5.10 and newer): sudo powerjoular. On macOS, powermetrics also requires root/sudo access: sudo powerjoular. On FreeBSD, reading RAPL needs the cpuctl module (kldload cpuctl) and root/sudo access: sudo powerjoular. On Windows and Raspberry Pi, no special access is needed, except with the PawnIO driver on Windows, which needs a terminal with administrative rights (see Supported Platforms).

By default, the software will show the total power consumption, and the power of the CPU and of the GPU (when there is one), on the terminal, every second, until Ctrl+C:

Total Power: 18.45 Watts (CPU: 15.20 W, GPU: 3.25 W)

To monitor a specific application, just run PowerJoular with the -a appName parameter, or with -p pid for a specific process. The terminal then shows the CPU usage and the CPU power of the application or the process, with the ones of the whole system between brackets:

Application monitoring:	CPU: 3.10 % (24.60 %)	1.92 Watts (15.20 Watts)

To save the power data to a CSV file, add -f filename, or -o filename to keep only the latest values in the file. When a file (or the ring buffer, with -r) is given, PowerJoular no longer prints on the terminal: add -t to print there too.

PowerJoular is a powerful tool with many functionalities that can be accessed using specific parameters. Check the Command Line Options page for the detailed list.