Low performance of the Metis M2 on the Raspberry Pi5

Hi ​@mgruner ,

That is indeed lower than expected FPS, as our tests run much faster.

• What M.2 HAT are you using?

I suppose you already did it but can you double check that:

• The following line has been added to /boot/firmware/config.txt:
  • dtparam=pciex1_gen=3
• You have rebooted your Raspberry Pi with sudo reboot for these settings to take effect.

Once you have done this, let’s check the actual speed of the PCIe link by doing and share the output with us:

• sudo lspci -s 0000:01:00.0 -vvv

Note: you have to use the address where Metis is located (which might or might not be 0000:01:00.0), which you can find doing lspci.

Kind regards,

Victor

Hello ​@mgruner , I have been able to reproduce your issue and have found a workaround.

Can you please try running like this:

AXELERA_USE_DOUBLE_BUFFER=0 ./inference.py yolov8s-coco-onnx ./media/traffic1_480p.mp4 

If that crashed, please try:

AXELERA_USE_DOUBLE_BUFFER=0 AXELERA_CONFIGURE_BOARD=,30 ./inference.py yolov8s-coco-onnx ./media/traffic1_480p.mp4 

For some reason we are investigating, it looks like in some cases something is going wrong with double buffering on Raspberry Pi 5. Note that the two commands I shared are almost not affecting performance.

Let us know how it goes.

Best,

Victor

FYI ​@Spanner 

Hey ​@Victor Labian, thanks for the prompt response and workarounds! I don't have the Metis with me right now, but will test next week and report back.