Performance issues

[mikovur]

Hi,

I'm trying to get USRP N310 with Arm Ampere M128-30 based system running 5G SA n78 at 100MHz in 4x4 (4x1) mode and I'm constantly getting overflows. Adapter is Mellanox ConnectX4, radio is connected via 2xSFP+ DACs and even though USRP bandwidth tests complete as they should without any issues but srsRAN is having trouble with high number of underflows. Tried distribution among cores, everything is in performance mode, MTU and other network params are setup as well as rmem and wmem values. Only stable config where I get about 400Mbit/s is on a 60MHz in 2x1 setup, anything that aims to 4x1 results in underflows as well.

I cannot even get speeds north of 500Mbit/s as shown here:
https://x.com/srsRANProject/status/1668339595925409793

nor performance on 50MHz as described here:
#109

Any help or ideas would be appreciated.

Thank you!