Hi, I am attempting to use two USRP x310 to deploy a 5G SA networking using the openairinterface5g open-source system. However, I am experiencing a receive overflow error when attempting to deploy both an OAI-nrUE and OAI-gNB.
The nrUE gives an *ERROR_CODE_OVERFLOW (Overflow) *warning before failing and referencing a function in the OAI code. My gNB runs irregularly, constantly showing the *ERROR_CODE_OVERFLOW(Overflow) *message. In addition to multiple late or "L" messages. My system setting is as follows: - *OAI-nrUE* - Latitude -E5570* (laptop)* - 16 GB RAM, i7-6820HQ with 4 cores, 8 threads @ 2.70 GHz running Ubuntu 18.04 with 5.40-90 low latency kernel; 1-GigE connection to USRP x310 with CBX-120 daughterboard. UHD 3.15 - *OAI-gNB* - Optiplex-7040* (desktop)** - *16 GB RAM, i7-6700 with 4 cores, 8 threads @ 3.40 GHz- running Ubuntu 18.04 with 5.40-89 low latency kernel; 1-GigE connection to USRP x310 with CBX-120 daughterboard. UHD 4.1 I've made the following changes to both systems: - Set the socket buffers (rmem_default, rmem_max, wmem_max, wmem_default) to 33554432 - Set TX and RX ring buffers on the interface to max value of 4096. - Set scaling_governor to "performance" mode for each CPU. - Disabled C states. - Performed self-calibration on OAI-nrUE USRP x310 using uhd_cal_rx_iq_balance, uhd_cal_tx_iq_balance, and uhd_cal_tx_dc_offset. Do you have any recommendations for my overflow issues? Also, Is there a way to lower the number of samples transmitted? Additionally, I tried to run the UHD benchmark test in examples. However, I had issues converting the cpp file to an executable. It failed for some reason. Do you have any advice for this as well? -- V/r LoyCurtis Smith
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