Tegrastats documentation - Jetpack 3.2

Robotics & Edge Computing Jetson & Embedded Systems Jetson TX2
1

Hi

I see that tegrastats changed a bit in the Jetpack 3.2 release.

Can anyone point me in the direction of some documentation that describes the different stats?

RAM 721/7854MB (lfb 1615x4MB) CPU [0%@960,off,off,0%@959,0%@960,0%@959] EMC_FREQ 1%@665 GR3D_FREQ 0%@140 APE 150 BCPU@33C MCPU@33C GPU@30C PLL@33C Tboard@28C Tdiode@29.5C PMIC@100C thermal@31.5C VDD_IN 2028/2028 VDD_CPU 153/153 VDD_GPU 153/153 VDD_SOC 382/382 VDD_WIFI 0/0 VDD_DDR 212/212

2

Hi njal, you can find the tegrastats documentation included under the L4T Documentation. After extracting the tarball and opening it in your web browser, expand the “Applications and Tools” entry in the navigation view on the left-hand side, and then select “TegraStats” utility from the drop-down.

3

Thanks @dusty_nv - here is the newest documentation as far as I can understand. It’s from March 2018.

There are still some parameters which aren’t explained in depth in the documentation - e.g.

  • BCPU
  • MCPU
  • PLL
  • Tboard
  • Tdiode
  • PMIC
  • thermal
  • VDD_IN (input voltage - 2028 means 20.28v?)
  • VDD_CPU (cpu voltage - 153 means 1.53v?)
  • VDD_GPU (gpu voltage - 153 means 1.53v?)
  • VDD_SOC (SystemOnChip voltage - 382 means 3.82v?)
  • VDD_WIFI (Wifi chip voltage - 0 means 0.00v?)
  • VDD_DDR (DDR Memory voltage - 212 means 2.12v?)

Furthermore, the documentation contains parameters that aren’t used by tegrastats anymore - e.g. NVDEC

It would be great if the documentation could be updated/improved and made accessible through man, –help or otherwise made easily available online.

Screenshot from the documentation:

1229×809 55.7 KB

4

NVENC (aka MSENC) and NVDEC are shown only when active.
You may activate these from another shell for example running:

gst-launch-1.0 -ev nvcamerasrc ! 'video/x-raw(memory:NVMM)' ! omxh264enc ! h264parse ! omxh264dec ! nvvidconv ! 'video/x-raw' ! xvimagesink

BCPU to thermal are temperatures in Celsius degrees. (PMIC showing 100°C is usual, albeit not true).
You may also check sysfs contents of /sys/class/thermal/ for details (you may check https://devtalk.nvidia.com/default/topic/1021313/jetson-tx1/use-c-language-get-cpu-thermal-sensor-temperature-tx1-/post/5198956/#5198956 and https://devtalk.nvidia.com/default/topic/1031414/?comment=5247276).

VDD_IN to VDD_DDR are voltages to different parts (I think indeed these are in centiVolts).