Arm Statistical Profiling Extension on the Jetson Orin Nano Developer Kit

Autonomous Machines Jetson & Embedded Systems Jetson Orin Nano
1

Hello, according to the respective Technical Reference Manual, the Arm Cortex-A78AE CPU cores that the Jetson Orin Nano Developer Kit is based on support the Statistical Profiling Extension (SPE). After upgrading the firmware with JetPack 6.0, I have installed stock Ubuntu 24.04 with kernel 6.8.0-41-generic, but the system doesn’t report SPE as being supported (e.g. no relevant entry in /sys/bus/event_source/devices). FYI the arm_spe_pmu kernel module is loaded and I have passed kpti=off on the kernel command line as required, which points to a firmware issue. Are there any plans to enable SPE support on the Jetson Orin Nano Developer Kit?

2

This is not we supported, suggest to use the version from JetPack for more testing.

3

Thank you for the suggestion. I tried with JetPack and kernel 5.15.136 (I had to compile the arm_spe_pmu kernel module separately because it is not part of the regular SD card image) - the result was the same.

6

Hi,
We don’t have much experience in the function. Would need other users to provide suggestion.

For capability of CPU cores, please check section 2.2 in module data sheet:

Jetson Download Center | NVIDIA Developer