How is it works#

jtop is a power monitor that use a service and a python client library.


Like the image above, when jtop service start, load and decode the information on your board.


  1. Read NVIDIA Jetson EEPROM to detect which NVIDIA Jetson is running

  2. decode jetson_clocks to know if is running and which engines are involved when it start.

  3. decode the NVPmodel to know which model is selected

  4. Open the /run/jtop.sock socket and wait a jtop client connection


When jtop is running read all status from your current board and share all this data to all jtop python connections.

  1. Read and estimate the CPU utilization from /proc/stat

  2. Read status from all devices in /sys/devices/system

  3. Read and decode memory status from /proc/meminfo

  4. Decode and read status from all swap using swapon command

  5. Check status from jetson_clocks

  6. Check which nvpmodel is running


jtop use a service to sharing the data between client (jtop gui or your python script) and a server.

This service, called jtop.service use a socket file. It is located in:


This socket is protected by access mode: 660 equivalent to srw-rw---- and by the group.

Only other users in jtop group have access to this socket