I have a devkit and some custom nano boards equipped with jetpack-4.6 and exactly the same kernel. On some of the custom boards, the performances measured by the tests at GitHub - NVIDIA-AI-IOT/jetson_benchmarks: Jetson Benchmark are really bad, compared with the expected performances shown by the table at https://developer.nvidia.com/embedded/jetson-benchmarks. I do not find error or different messages in kernel logs. Where should I look to understand and fix that performance problem ?
The issue did not happen up to now on the devkit, and it happens only on some custom boards but seem not be hardware-dependent : On one board, after a reflash, the issue disappeared but we do not find why. All the firmware partitions are identical (except the DTB* of course) between a ‘fast’ one and a ‘slow’ one.
The clocks in /sys/devices/57000000.gpu/devfreq/57000000.gpu are identical between a ‘fast’ and a ‘slow’ boards.
Which other debug entries or tools should I use ?
Hi,
From the prints it looks like one has sudo jetson_clocks executed and the other is not. Please run either model(such ad YoloV3 tiny) and share the prints. See if there is deviation while a model is running.
Here are the results of YoloV3 tiny after the call to ‘sudo jetson_clocks’
------------Executing yolov3-tiny-416------------
--------------------------
Model Name: yolov3-tiny-416
FPS:18.31
--------------------------
Wall Time for running model (secs): 771.2218413352966
As you can see, there is no improvement.
I also ran ‘sudo tegrastats’ while the test was running. Here are the results :
Hi,
The issue looks to be in EMC frequency. It runs at 204MHz only. On fast one, it can reach 1.6GHz. Could you check this? Probably the voltage or current to EMC is not sufficient.
Can that be caused by some bad or missing entry in the DT or is it the other way around : missing nodes (related to ‘external-memory-controller@7001b000’) are caused by not getting enough voltage or current ?
Please use devkit to test first.
Everyone here says their custom board is a copy from devkit but everyone filed a topic to ask question on their board.